1008672501@GENIA Treebank@formal@@1@S@MDS1/EVI1 enhances TGF-beta1 signaling and strengthens its growth-inhibitory effect but the leukemia-associated fusion protein AML1/MDS1/EVI1, product of the t(3;21), abrogates growth-inhibition in response to TGF-beta1.@@@@1@28@@oe@19-12-2010 1008672502@GENIA Treebank@formal@@1@S@MDS1/EVI1, located on chromosome 3 band q26, encodes a zinc-finger DNA-binding transcription activator not detected in normal hematopoietic cells but expressed in several normal tissues.@@@@1@28@@oe@19-12-2010 1008672503@GENIA Treebank@formal@@1@S@MDS1/EVI1 is inappropriately activated in myeloid leukemias following chromosomal rearrangements involving band 3q26.@@@@1@14@@oe@19-12-2010 1008672504@GENIA Treebank@formal@@1@S@The rearrangements lead either to gene truncation, and to expression of the transcription repressor EVI1, as seen in the t(3;3)(q21;q26) and inv(3)(q21q26), or to gene fusion, as seen in the t(3;21)(q26;q22) which results in the fusion protein AML1/MDS1/EVI1.@@@@1@43@@oe@19-12-2010 1008672505@GENIA Treebank@formal@@1@S@This fusion protein contains the DNA-binding domain of the transcription factor AML1 fused in-frame to the entire MDS1/EVI1 with the exclusion of its first 12 amino acids.@@@@1@28@@oe@19-12-2010 1008672506@GENIA Treebank@formal@@1@S@In this report, we have analyzed the response of the hematopoietic precursor cell line 32Dcl3, expressing either the normal protein MDS1/EVI1 or the fusion protein AML1/MDS1/EVI1, to factors that control cell differentiation or cell replication.@@@@1@39@@oe@19-12-2010 1008672507@GENIA Treebank@formal@@1@S@The 32Dcl3 cells are IL-3-dependent for growth and they differentiate into granulocytes when exposed to G-CSF.@@@@1@17@@oe@19-12-2010 1008672508@GENIA Treebank@formal@@1@S@They are growth-inhibited by TGF-beta1.@@@@1@6@@oe@19-12-2010 1008672509@GENIA Treebank@formal@@1@S@We show that whereas the expression of MDS1/EVI1 has no effect on granulocytic differentiation induced by G-CSF, expression of AML1/MDS1/EVI1 blocks differentiation resulting in cell death.@@@@1@28@@oe@19-12-2010 1008672510@GENIA Treebank@formal@@1@S@This effect is similar to that previously described by others for 32Dcl3 cells that express transgenic Evil.@@@@1@18@@oe@19-12-2010 1008672511@GENIA Treebank@formal@@1@S@Furthermore, we show that whereas the expression of the fusion protein AML1/MDS1/EVI1 completely abrogates the growth-inhibitory effect of TGF-beta1 and allows 32Dcl3 cells to proliferate, expression of the normal protein MDS1/EVI1 has the opposite effect, and it strengthens the response of cells to the growth-inhibitory effect of TGF-beta1.@@@@1@52@@oe@19-12-2010 1008672512@GENIA Treebank@formal@@1@S@By using the yeast two-hybrid system, we also show that EVI1 (contained in its entirety in MDS1/EVI1 and AML1/MDS1/EVI1) physically interacts with SMAD3, which is an intracellular mediator of TGF-beta1 signaling.@@@@1@36@@oe@19-12-2010 1008672513@GENIA Treebank@formal@@1@S@Finally, we have correlated the response of the cells to G-CSF or TGF-beta1 with the ability of the normal and fusion proteins to activate or repress promoters which they can directly regulate by binding to the promoter site.@@@@1@40@@oe@19-12-2010 1008672514@GENIA Treebank@formal@@1@S@We propose that mutations of MDS1/EVI1 either by gene truncation resulting in the transcription repressor EVI1 or by gene fusion to AML1 lead to an altered cellular response to growth and differentiation factors that could result in leukemic transformation.@@@@1@40@@oe@19-12-2010 1008672515@GENIA Treebank@formal@@1@S@The different response of myeloid cells ectopically expressing the normal or the fusion protein to G-CSF and TGF-beta1 could depend on the different transactivation properties of these proteins resulting in divergent expression of downstream genes regulated by the two proteins.@@@@1@41@@oe@19-12-2010 1008718101@GENIA Treebank@formal@@1@S@Interferon-alpha induction of STATs1, -3 DNA binding and growth arrest is independent of Lck and active mitogen-activated kinase in T cells.@@@@1@23@@oe@19-12-2010 1008718102@GENIA Treebank@formal@@1@S@Type I interferons (IFNs) are a family of cytokines that have antiviral and antiproliferative effects.@@@@1@18@@oe@19-12-2010 1008718103@GENIA Treebank@formal@@1@S@Data regarding the processes by which these cytokines transduce signals from the cell membrane to the nucleus are becoming increasingly complex.@@@@1@22@@oe@19-12-2010 1008718104@GENIA Treebank@formal@@1@S@The most characterized pathway is via JAK-STAT signaling.@@@@1@9@@oe@19-12-2010 1008718105@GENIA Treebank@formal@@1@S@Previous studies established a potential role for the Src-family kinase Lck in JAK-STAT signaling.@@@@1@15@@oe@19-12-2010 1008718106@GENIA Treebank@formal@@1@S@Therefore, this study was designed to analyze the role of Lck in IFN-alpha signaling by using the Jurkat, JCam (an Lck-defective cell line derived from Jurkat), and JCam/Lck (JCam cells with Lck restored).@@@@1@41@@oe@19-12-2010 1008718107@GENIA Treebank@formal@@1@S@The results show that IFN-alpha can induce MAPK activity, but only in cells containing Lck.@@@@1@17@@oe@19-12-2010 1008718108@GENIA Treebank@formal@@1@S@Furthermore, STATs1 and -3 are effectively phosphorylated and activated to bind DNA in the absence of Lck expression in IFN-alpha-treated cells.@@@@1@23@@oe@19-12-2010 1008718109@GENIA Treebank@formal@@1@S@Finally, the results demonstrate that IFN-alpha exerts an antiproliferative effect in all three cell lines.@@@@1@17@@oe@19-12-2010 1008718110@GENIA Treebank@formal@@1@S@These data indicate that Lck and active MAPK do not affect IFN-alpha-induced growth arrest or induction of STAT1s1 and -3 DNA binding ability.@@@@1@24@@oe@19-12-2010 1008718111@GENIA Treebank@formal@@1@S@Copyright 1999 Academic Press.@@@@1@5@@oe@19-12-2010 1008764801@GENIA Treebank@formal@@1@S@T helper differentiation proceeds through Stat1-dependent, Stat4-dependent and Stat4-independent phases.@@@@1@12@@oe@19-12-2010 1008764802@GENIA Treebank@formal@@1@S@Much of our focus in understanding Th1/Th2 development has been on the signals delivered by IL-12 and IL-4 as final determinants of terminal T cell differentiation.@@@@1@27@@oe@19-12-2010 1008764803@GENIA Treebank@formal@@1@S@Because extinction of IL-12 signaling in early Th2 development could potentially be important in imprinting a more permanent Th2 phenotype on a population of T cells, we have also examined various parameters regulating the IL-12 signaling pathway.@@@@1@39@@oe@19-12-2010 1008764804@GENIA Treebank@formal@@1@S@Whereas IL-4 appears to repress functional IL-12 signaling through inhibition of IL-12R beta 2 expression, IFN-gamma in the mouse, and IFN-alpha in the human appear to induce IL-12R beta 2 expression and promote IL-12 responsiveness.@@@@1@38@@oe@19-12-2010 1008764805@GENIA Treebank@formal@@1@S@We propose that Th1 development can be considered in two stages, capacitance and development.@@@@1@16@@oe@19-12-2010 1008764806@GENIA Treebank@formal@@1@S@Capacitance would simply involve expression of IL-12R beta 1 and beta 2 subunits, regulated by TCR, IL-4 and IFNs.@@@@1@22@@oe@19-12-2010 1008764807@GENIA Treebank@formal@@1@S@The second stage, development, we propose is the true IL-12 induced developmental stage, involving expression of Stat4 inducible proteins.@@@@1@23@@oe@19-12-2010 1008764808@GENIA Treebank@formal@@1@S@In the human, this may also occur via IFN-alpha, which is able to activate Stat4.@@@@1@18@@oe@19-12-2010 1008764809@GENIA Treebank@formal@@1@S@It is perhaps possible that all of Stat4 actions on Th1 development may be exert directly by Stat4 at the IFN-gamma gene, however we suggest that, more likely, Stat4 may act to induce Th1 development through the induction of other non-cytokine genes, whose stable expression maintains the transcriptional state of a Th1 cell.@@@@1@58@@oe@19-12-2010 1009033801@GENIA Treebank@formal@@1@S@The relationship between Ca2+-ATPase and freely exchangeable Ca2+ in the dense tubules: a study in platelets from women.@@@@1@20@@oe@19-12-2010 1009033802@GENIA Treebank@formal@@1@S@The main aims of this work were to examine in women: the relationship between the freely exchangeable Ca2+ (FECa2+) in the dense tubules and the activity of the sarco(endo)plasmic reticulum (SER) Ca2+-ATPase (SERCA) in platelets, and the relationship of these parameters with blood pressure and serum lipoproteins.@@@@1@60@@oe@19-12-2010 1009033803@GENIA Treebank@formal@@1@S@Platelets from 14 white and 13 black women in good health were studied.@@@@1@14@@oe@19-12-2010 1009033804@GENIA Treebank@formal@@1@S@The FECa2+ was measured as the ionomycin-evoked Ca2+ release (in the presence of thapsigargin) in Ca2+-free medium.@@@@1@20@@oe@19-12-2010 1009033805@GENIA Treebank@formal@@1@S@SERCA activity was measured as the thapsigargin sensitive, Ca2+ dependent and ouabain resistant, ATP hydrolyses in platelet membranes.@@@@1@21@@oe@19-12-2010 1009033806@GENIA Treebank@formal@@1@S@Relative expressions of SERCA 2 and 3 isoforms and Ras-related protein (Rap) 1 in platelet membranes were determined by Western immunoblots.@@@@1@24@@oe@19-12-2010 1009033807@GENIA Treebank@formal@@1@S@Highly significant correlations were observed for FECa2+ in the dense tubules with: 1) the maximal reaction velocity (Vmax) of the SERCA (r = 0.592, P = .0014), and 2) Rapl (r = 0.551, P = .0035).@@@@1@49@@oe@19-12-2010 1009033808@GENIA Treebank@formal@@1@S@In addition, negative correlations were observed between FECa2+ in the dense tubules and age.@@@@1@16@@oe@19-12-2010 1009033809@GENIA Treebank@formal@@1@S@No correlations were observed for these variables with blood pressure or serum lipoproteins.@@@@1@14@@oe@19-12-2010 1009033810@GENIA Treebank@formal@@1@S@We conclude the FECa2+ and the Vmax of the SERCA are reliable indicators of Ca2+ load in platelets from women.@@@@1@21@@oe@19-12-2010 1009033811@GENIA Treebank@formal@@1@S@However, in women, unlike previous observations in men, these platelet parameters are not correlated with blood pressure and serum lipoproteins.@@@@1@24@@oe@19-12-2010 1009092301@GENIA Treebank@formal@@1@S@Nonimmunoglobulin gene hypermutation in germinal center B cells.@@@@1@9@@oe@19-12-2010 1009092302@GENIA Treebank@formal@@1@S@Somatic hypermutation is the most critical mechanism underlying the diversification of Ig genes.@@@@1@14@@oe@19-12-2010 1009092303@GENIA Treebank@formal@@1@S@Although mutation occurs specifically in B cells during the germinal center reaction, it remains a matter of debate whether the mutation machinery also targets non-Ig genes.@@@@1@28@@oe@19-12-2010 1009092304@GENIA Treebank@formal@@1@S@We have studied mutations in the 5' noncoding region of the Bcl6 gene in different subtypes of lymphomas.@@@@1@19@@oe@19-12-2010 1009092305@GENIA Treebank@formal@@1@S@We found frequent hypermutation in follicular lymphoma (25 of 59 = 42%) (germinal center cell origin) and mucosa-associated lymphoid tissue (MALT) lymphoma (19 of 45 = 42%) (postgerminal center), but only occasionally in mantle cell lymphoma (1 of 21 = 4.8%) (pregerminal center).@@@@1@62@@oe@19-12-2010 1009092306@GENIA Treebank@formal@@1@S@Most mutations were outside the motifs potentially important for transcription, suggesting they were not important in lymphomagenesis but may, like Ig mutation, represent an inherent feature of the lymphoma precursor cells.@@@@1@35@@oe@19-12-2010 1009092307@GENIA Treebank@formal@@1@S@Therefore, we investigated their normal cell counterparts microdissected from a reactive tonsil.@@@@1@14@@oe@19-12-2010 1009092308@GENIA Treebank@formal@@1@S@Bcl6 mutation was found in 13 of 24 (54%) clones from the germinal centre but only in 1 of 24 (4%) clones from the naive B cells of the mantle zone.@@@@1@38@@oe@19-12-2010 1009092309@GENIA Treebank@formal@@1@S@The frequency, distribution, and nature of these mutations were similar to those resulting from the Ig hypermutation process.@@@@1@21@@oe@19-12-2010 1009092310@GENIA Treebank@formal@@1@S@The results show unequivocal evidence of non-Ig gene hypermutation in germinal center B cells and provide fresh insights into the process of hypermutation and lymphomagenesis.@@@@1@26@@oe@19-12-2010 1009093101@GENIA Treebank@formal@@1@S@1,25-Dihydroxyvitamin D3 induces differentiation of a retinoic acid-resistant acute promyelocytic leukemia cell line (UF-1) associated with expression of p21(WAF1/CIP1) and p27(KIP1).@@@@1@24@@oe@19-12-2010 1009093102@GENIA Treebank@formal@@1@S@Retinoic acid (RA) resistance is a serious problem for patients with acute promyelocytic leukemia (APL) who are receiving all-trans RA.@@@@1@25@@oe@19-12-2010 1009093103@GENIA Treebank@formal@@1@S@However, the mechanisms and strategies to overcome RA resistance by APL cells are still unclear.@@@@1@17@@oe@19-12-2010 1009093104@GENIA Treebank@formal@@1@S@The biologic effects of RA are mediated by two distinct families of transcriptional factors: RA receptors (RARs) and retinoid X receptors (RXRs).@@@@1@28@@oe@19-12-2010 1009093105@GENIA Treebank@formal@@1@S@RXRs heterodimerize with 1, 25-dihydroxyvitamin D3 [1,25(OH)2D3] receptor (VDR), enabling their efficient transcriptional activation.@@@@1@19@@oe@19-12-2010 1009093106@GENIA Treebank@formal@@1@S@The cyclin-dependent kinase (cdk) inhibitor p21(WAF1/CIP1) has a vitamin D3-responsive element (VDRE) in its promoter, and 1,25(OH)2D3 enhances the expression of p21(WAF1/CIP1) and induces differentiation of selected myeloid leukemic cell lines.@@@@1@37@@oe@19-12-2010 1009093107@GENIA Treebank@formal@@1@S@We have recently established a novel APL cell line (UF-1) with features of RA resistance.@@@@1@18@@oe@19-12-2010 1009093108@GENIA Treebank@formal@@1@S@1,25(OH)2D3 can induce growth inhibition and G1 arrest of UF-1 cells, resulting in differentiation of these cells toward granulocytes.@@@@1@21@@oe@19-12-2010 1009093109@GENIA Treebank@formal@@1@S@This 1, 25(OH)2D3-induced G1 arrest is enhanced by all-trans RA.@@@@1@10@@oe@19-12-2010 1009093110@GENIA Treebank@formal@@1@S@Also, 1, 25(OH)2D3 (10(-10) to 10(-7) mol/L) in combination with RA markedly inhibits cellular proliferation in a dose- and time-dependent manner.@@@@1@24@@oe@19-12-2010 1009093111@GENIA Treebank@formal@@1@S@Associated with these findings, the levels of p21(WAF1/CIP1) and p27(KIP1) mRNA and protein increased in these cells.@@@@1@19@@oe@19-12-2010 1009093112@GENIA Treebank@formal@@1@S@Northern blot analysis showed that p21(WAF1/CIP1) and p27(KIP1) mRNA and protein increased in these cells.@@@@1@16@@oe@19-12-2010 1009093113@GENIA Treebank@formal@@1@S@Northern blot analysis showed that p21(WAF1/CIP1) and p27(KIP1) transcripts were induced after 6 hours' exposure to 1,25(OH)2D3 and then decreased to basal levels over 48 hours.@@@@1@28@@oe@19-12-2010 1009093114@GENIA Treebank@formal@@1@S@Western blot experiments showed that p21(WAF1/CIP1) protein levels increased and became detectable after 12 hours of 1,25(OH)2D3 treatment and induction of p27(KIP1) protein was much more gradual and sustained in UF-1 cells.@@@@1@33@@oe@19-12-2010 1009093115@GENIA Treebank@formal@@1@S@Interestingly, the combination of 1, 25(OH)2D3 and RA markedly enhanced the levels of p27(KIP1) transcript and protein as compared with levels induced by 1, 25(OH)2D3 alone.@@@@1@26@@oe@19-12-2010 1009093116@GENIA Treebank@formal@@1@S@In addition, exogenous p27(KIP1) expression can enhance the level of CD11b antigen in myeloid leukemic cells.@@@@1@18@@oe@19-12-2010 1009093117@GENIA Treebank@formal@@1@S@In contrast, RA alone can induce G1 arrest of UF-1 cells; however, it did not result in an increase of p21(WAF1/CIP1) and p27(KIP1) transcript and protein expression in RA-resistant cells.@@@@1@34@@oe@19-12-2010 1009093118@GENIA Treebank@formal@@1@S@Taken together, we conclude that 1,25(OH)2D3 induces increased expression of cdk inhibitors, which mediates a G1 arrest, and this may be associated with differentiation of RA-resistant UF-1 cells toward mature granulocytes.@@@@1@35@@oe@19-12-2010 1009094201@GENIA Treebank@formal@@1@S@Human immunodeficiency virus-associated Hodgkin's disease derives from post-germinal center B cells.@@@@1@13@@oe@19-12-2010 1009094202@GENIA Treebank@formal@@1@S@Human immunodeficiency virus-associated Hodgkin's disease (HIV-HD) displays several peculiarities when compared with HD of the general population.@@@@1@21@@oe@19-12-2010 1009094203@GENIA Treebank@formal@@1@S@These include overrepresentation of clinically aggressive histologic types and frequent infection of Reed-Sternberg (RS) cells by Epstein-Barr virus (EBV).@@@@1@24@@oe@19-12-2010 1009094204@GENIA Treebank@formal@@1@S@Recently, we have reported that the histogenesis of HD of the general population may be assessed by monitoring the expression pattern of BCL-6, a transcription factor expressed in germinal center (GC) B cells, and of CD138/syndecan-1 (syn-1), a proteoglycan associated with post-GC, terminal B-cell differentiation.@@@@1@55@@oe@19-12-2010 1009094205@GENIA Treebank@formal@@1@S@In this study, we have applied these two markers to the study of HIV-HD histogenesis and correlated their expression status to the virologic features of this disease.@@@@1@29@@oe@19-12-2010 1009094206@GENIA Treebank@formal@@1@S@We have found that RS cells of all histologic categories of HIV-HD consistently display the BCL-6(-)/syn-1(+) phenotype and thus reflect post-GC B cells.@@@@1@24@@oe@19-12-2010 1009094207@GENIA Treebank@formal@@1@S@Although BCL-6(-)/syn-1(+)RS cells of HIV-HD express CD40, they are not surrounded by CD40 ligand-positive (CD40L+) reactive T lymphocytes, which, in HD of the general population, are thought to regulate the disease phenotype through CD40/CD40L interactions.@@@@1@43@@oe@19-12-2010 1009094208@GENIA Treebank@formal@@1@S@Conversely, RS cells of virtually all HIV-HD express the EBV-encoded latent membrane protein 1 (LMP1), which, being functionally homologous to CD40, may contribute, at least in part, to the modulation of the HIV-HD phenotype.@@@@1@43@@oe@19-12-2010 1009210901@GENIA Treebank@formal@@1@S@Interferon-beta mediates stromal cell rescue of T cells from apoptosis.@@@@1@11@@oe@19-12-2010 1009210902@GENIA Treebank@formal@@1@S@The resolution of immune responses is characterized by extensive apoptosis of activated T cells.@@@@1@15@@oe@19-12-2010 1009210903@GENIA Treebank@formal@@1@S@However, to generate and maintain immunological memory, some antigen-specific T cells must survive and revert to a resting G0/G1 state.@@@@1@23@@oe@19-12-2010 1009210904@GENIA Treebank@formal@@1@S@Cytokines that bind to the common gamma chain of the IL-2 receptor promote the survival of T cell blasts, but also induce proliferation.@@@@1@25@@oe@19-12-2010 1009210905@GENIA Treebank@formal@@1@S@In contrast, soluble factors secreted by stromal cells induce Tcell survival in a resting G0/G1 state.@@@@1@19@@oe@19-12-2010 1009210906@GENIA Treebank@formal@@1@S@We now report that interferon-beta is the principal mediator of stromal cell-mediated Tcell rescue from apoptosis.@@@@1@18@@oe@19-12-2010 1009210907@GENIA Treebank@formal@@1@S@Interferon-alpha and -beta promote the reversion of blast Tcells to a resting G0/G1 configuration with all the characteristic features of stromal cell rescue; such as high Bcl-XL expression and low Bcl-2.@@@@1@34@@oe@19-12-2010 1009210908@GENIA Treebank@formal@@1@S@Type I interferons and stromal cells stimulate apparently identical signaling pathways, leading to STAT-1 activation.@@@@1@17@@oe@19-12-2010 1009210909@GENIA Treebank@formal@@1@S@We also show that this mechanism may play a fundamental role in the persistence of T cells at sites of chronic inflammation; suggesting that chronic inflammation is an aberrant consequence of immunological memory.@@@@1@35@@oe@19-12-2010 1009282501@GENIA Treebank@formal@@1@S@Glucocorticoids promote nonphlogistic phagocytosis of apoptotic leukocytes.@@@@1@8@@oe@19-12-2010 1009282502@GENIA Treebank@formal@@1@S@Phagocyte recognition, uptake, and nonphlogistic degradation of neutrophils and other leukocytes undergoing apoptosis promote the resolution of inflammation.@@@@1@21@@oe@19-12-2010 1009282503@GENIA Treebank@formal@@1@S@This study assessed the effects of anti-inflammatory glucocorticoids on this leukocyte clearance mechanism.@@@@1@14@@oe@19-12-2010 1009282504@GENIA Treebank@formal@@1@S@Pretreatment of "semimature" 5-day human monocyte-derived macrophages (M phi) for 24 h with methylprednisolone, dexamethasone, and hydrocortisone, but not the nonglucocorticoid steroids aldosterone, estradiol, and progesterone, potentiated phagocytosis of apoptotic neutrophils.@@@@1@42@@oe@19-12-2010 1009282505@GENIA Treebank@formal@@1@S@These effects were specific in that the potentiated phagocytosis of apoptotic neutrophils was completely blocked by the glucocorticoid receptor antagonist RU38486, and glucocorticoids did not promote 5-day M phi ingestion of opsonized erythrocytes.@@@@1@35@@oe@19-12-2010 1009282506@GENIA Treebank@formal@@1@S@Similar glucocorticoid-mediated potentiation was observed with 5-day M phi uptake of alternative apoptotic "targets" (eosinophils and Jurkat T cells) and in uptake of apoptotic neutrophils by alternative phagocytes (human glomerular mesangial cells and murine M phi elicited into the peritoneum or derived from bone marrow).@@@@1@52@@oe@19-12-2010 1009282507@GENIA Treebank@formal@@1@S@Importantly, methylprednisolone-mediated enhancement of the uptake of apoptotic neutrophils did not trigger the release of the chemokines IL-8 and monocyte chemoattractant protein-1.@@@@1@24@@oe@19-12-2010 1009282508@GENIA Treebank@formal@@1@S@Furthermore, longer-term potentiation by methylprednisolone was observed in maturing human monocyte-derived M phi, with greater increases in 5-day M phi uptake of apoptotic cells being observed the earlier glucocorticoids were added during monocyte maturation into M phi.@@@@1@40@@oe@19-12-2010 1009282509@GENIA Treebank@formal@@1@S@We conclude that potentiation of nonphlogistic clearance of apoptotic leukocytes by phagocytes is a hitherto unrecognized property of glucocorticoids that has potential implications for therapies aimed at promoting the resolution of inflammatory diseases.@@@@1@34@@oe@19-12-2010 1009657401@GENIA Treebank@formal@@1@S@Glucocorticoid-induced cell death requires autoinduction of glucocorticoid receptor expression in human leukemic T cells.@@@@1@15@@oe@19-12-2010 1009657402@GENIA Treebank@formal@@1@S@In contrast to the negative autoregulation of glucocorticoid receptor (GR) expression seen in most cells and tissues, GR expression is positively autoregulated in human leukemic T cells and in other cells sensitive to glucocorticoid-induced cell death.@@@@1@40@@oe@19-12-2010 1009657403@GENIA Treebank@formal@@1@S@To determine whether positive autoregulation is a necessary component of glucocorticoid-induced cell death, a wild-type GR gene under the control of a tetracycline-regulated promoter was stably transfected into glucocorticoid-resistant cells lacking endogenous functional receptor.@@@@1@36@@oe@19-12-2010 1009657404@GENIA Treebank@formal@@1@S@Transfectants grown in the presence of tetracycline contained about 15,000 receptors/cell, a value approximately equal to basal level GR expression in glucocorticoid-sensitive 6TG1.1 cells before steroid treatment.@@@@1@29@@oe@19-12-2010 1009657405@GENIA Treebank@formal@@1@S@Under these conditions, dexamethasone had a minimal effect on cell growth, elicited little internucleosomal DNA fragmentation, and induced no cell cycle perturbation.@@@@1@26@@oe@19-12-2010 1009657406@GENIA Treebank@formal@@1@S@In the absence of tetracycline, GR mRNA and protein expression increased 2-3-fold, and cells expressed 48,000 receptors, a level nearly equivalent to that present in 6TG1.1 cells after 18 h of autoinduction.@@@@1@36@@oe@19-12-2010 1009657407@GENIA Treebank@formal@@1@S@Under these conditions, dexamethasone markedly inhibited cell growth, caused G1 arrest, and induced significant internucleosomal DNA fragmentation.@@@@1@21@@oe@19-12-2010 1009657408@GENIA Treebank@formal@@1@S@These studies therefore suggest that basal level GR expression is inadequate to mediate glucocorticoid-induced apoptosis in glucocorticoid-sensitive T cells and that positive autoregulation is a necessary component of this process.@@@@1@31@@oe@19-12-2010 1009778801@GENIA Treebank@formal@@1@S@Jeg-3 human choriocarcinoma-induced immunosuppression: downregulation of interleukin-2, interleukin-2 receptor alpha-chain, and its Jak/Stat signaling pathway.@@@@1@19@@oe@19-12-2010 1009778802@GENIA Treebank@formal@@1@S@PROBLEM: The mechanisms of the immunosuppressive and immunosuppression-inducing capacities of Jeg-3 human choriocarcinoma cell line supernatants (HCSs) are not yet completely understood.@@@@1@26@@oe@19-12-2010 1009778803@GENIA Treebank@formal@@1@S@The influence on interleukin (IL)-2, IL-4 and interferon (IFN)-gamma production; IL-2 receptor (IL-2R) alpha-, beta-, and gamma-chain; and the signaling pathway molecules Janus kinase (Jak)1, Jak3, signal transducers and activators of transcription (Stat)1, Stat3, and Stat5 should be investigated.@@@@1@63@@oe@19-12-2010 1009778804@GENIA Treebank@formal@@1@S@METHOD OF STUDY: For assessment of IL production, whole peripheral venous blood from healthy donors was stimulated with phorbol-myristate-acetate and ionomycine.@@@@1@24@@oe@19-12-2010 1009778805@GENIA Treebank@formal@@1@S@Secretion of ILs was blocked with monensine.@@@@1@8@@oe@19-12-2010 1009778806@GENIA Treebank@formal@@1@S@Intracellular ILs were analyzed by flow cytometry.@@@@1@8@@oe@19-12-2010 1009778807@GENIA Treebank@formal@@1@S@For IL-2R and signaling pathway molecule analysis, peripheral blood lymphocytes were stimulated with phytohemagglutinin (PHA).@@@@1@19@@oe@19-12-2010 1009778808@GENIA Treebank@formal@@1@S@IL-2R chains were measured by flow cytometry, and Jaks/Stats by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot.@@@@1@24@@oe@19-12-2010 1009778809@GENIA Treebank@formal@@1@S@RESULTS: Phorbol-myristate-acetate and ionomycine strongly increase the percent-age of IL-2+ cells; an additional 50% HCSs significantly suppresses the percentage to, or below the level of unstimulated cells.@@@@1@32@@oe@19-12-2010 1009778810@GENIA Treebank@formal@@1@S@IFN-gamma production is strongly decreased by HCSs in some cases, but not in others.@@@@1@16@@oe@19-12-2010 1009778811@GENIA Treebank@formal@@1@S@PHA stimulates IL-2R alpha-, beta-, and gamma-chain expression and their signaling pathway molecules Jak1, Jak3, Stat1, Stat3, and Stat5.@@@@1@26@@oe@19-12-2010 1009778812@GENIA Treebank@formal@@1@S@50% HCS downregulates the alpha-chain and slightly upregulates the beta-chain.@@@@1@12@@oe@19-12-2010 1009778813@GENIA Treebank@formal@@1@S@Jak1, Jak3, Stat1, Stat3, and Stat5 expression is suppressed approximately to, or below the level of unstimulated cells.@@@@1@24@@oe@19-12-2010 1009778814@GENIA Treebank@formal@@1@S@CONCLUSIONS: HCS forcefully blocks the production of IL-2; the IL-2R alpha-chain; and Jak1, Jak3, Stat1, Stat3, and Stat5 expression.@@@@1@27@@oe@19-12-2010 1009778815@GENIA Treebank@formal@@1@S@The observed phenomena might be caused by downregulation of an IL-2R regulation gene, and might play a key role in the expansion of choriocarcinoma, and possibly in the survival of the fetal allograft.@@@@1@36@@oe@19-12-2010 1009860601@GENIA Treebank@formal@@1@S@Characterization of expression of the gene for human pterin carbinolamine dehydratase/dimerization cofactor of HNF1.@@@@1@15@@oe@19-12-2010 1009860602@GENIA Treebank@formal@@1@S@Pterin carbinolamine dehydratase/dimerization cofactor of HNF1 (PCD/DCoH) is a dual-function protein.@@@@1@14@@oe@19-12-2010 1009860603@GENIA Treebank@formal@@1@S@In the cytoplasm it acts as a dehydratase in the regeneration of tetrahydrobiopterin, the cofactor for aromatic amino acid hydroxylases.@@@@1@22@@oe@19-12-2010 1009860604@GENIA Treebank@formal@@1@S@In the nucleus, it functions as a dimerization cofactor of HNF1 and increases the transcriptional activity of HNF1.@@@@1@20@@oe@19-12-2010 1009860605@GENIA Treebank@formal@@1@S@To deepen our understanding of this protein, we characterized its expression in human tissues and cells.@@@@1@18@@oe@19-12-2010 1009860606@GENIA Treebank@formal@@1@S@Human PCD/DCoH was present predominantly in liver and kidney, with significant amounts in testis and ovary, trace amounts in lung, and undetectable levels in whole brain, heart, and spleen.@@@@1@35@@oe@19-12-2010 1009860607@GENIA Treebank@formal@@1@S@It was expressed in all of the cells that were examined.@@@@1@12@@oe@19-12-2010 1009860608@GENIA Treebank@formal@@1@S@Importantly, it was also present in the nucleus of HeLa cells, which lack HNF1, and in the cytoplasm of fibroblasts that have little or no tetrahydrobiopterin.@@@@1@30@@oe@19-12-2010 1009860609@GENIA Treebank@formal@@1@S@The expression of human PCD/DCoH in the liver and nonhepatic cells was compared at both the mRNA and protein levels.@@@@1@21@@oe@19-12-2010 1009860610@GENIA Treebank@formal@@1@S@Although the mRNA level in liver was only fourfold higher than that in keratinocytes and fibroblasts, the hepatic PCD/DCoH protein level was 20-fold higher than that in normal human epidermal keratinocytes and dermal fibroblasts.@@@@1@36@@oe@19-12-2010 1009860611@GENIA Treebank@formal@@1@S@Cloning of the 5' and 3' untranslated region (UTR) of human keratinocyte PCD/DCoH revealed that it has 53 bp more of GC-rich 5' untranslated sequence than the published liver PCD/DCoH.@@@@1@33@@oe@19-12-2010 1009860612@GENIA Treebank@formal@@1@S@In vitro transcription and translation analysis showed that the longer 5' UTR resulted in about a 35% decrease in translation efficiency.@@@@1@23@@oe@19-12-2010 1009860613@GENIA Treebank@formal@@1@S@These data show that human PCD/DCoH is not only present in cells where tetrahydrobiopterin is synthesized or HNF1 is present but is a widely distributed protein.@@@@1@27@@oe@19-12-2010 1009860614@GENIA Treebank@formal@@1@S@Its differential expression in different tissues and cells is regulated not only at the transcriptional level but also at the translational level.@@@@1@23@@oe@19-12-2010 1010124901@GENIA Treebank@formal@@1@S@Vitamin D receptor 3'-untranslated region polymorphisms: lack of effect on mRNA stability.@@@@1@14@@oe@19-12-2010 1010124902@GENIA Treebank@formal@@1@S@Allelic variation at the 3'-end of the vitamin D receptor (VDR) gene has been associated with a 3-5-fold increased risk of developing prostate cancer and with differences in bone mineralization.@@@@1@33@@oe@19-12-2010 1010124903@GENIA Treebank@formal@@1@S@This genetic diversity does not alter the VDR protein structurally, but instead may be a marker(s) of other, nearby polymorphisms that influence message stability or translation.@@@@1@32@@oe@19-12-2010 1010124904@GENIA Treebank@formal@@1@S@The work reported here was instigated to identify additional VDR 3'-UTR polymorphisms that may have functional significance and to then test whether these genetic variants alter message stability.@@@@1@29@@oe@19-12-2010 1010124905@GENIA Treebank@formal@@1@S@Initially, four novel, frequently occurring sequence variants were identified that associated with two common haplotypes that were described previously.@@@@1@22@@oe@19-12-2010 1010124906@GENIA Treebank@formal@@1@S@These common sequence variants were not found within three message-destabilizing elements that we mapped within the 3'-UTR of the vitamin D receptor mRNA.@@@@1@24@@oe@19-12-2010 1010124907@GENIA Treebank@formal@@1@S@Furthermore, the two VDR 3'-UTR haplotypes conferred an identical half-life on a heterologous beta-globin reporter gene, in an in vitro assay.@@@@1@24@@oe@19-12-2010 1010124908@GENIA Treebank@formal@@1@S@We therefore conclude that common polymorphisms within the VDR 3'-UTR do not influence message stability.@@@@1@16@@oe@19-12-2010 1010160201@GENIA Treebank@formal@@1@S@[Induction of apoptosis in lymphocytes by glucocorticoids: between physiology and pharmacology]@@@@1@14@@oe@19-12-2010 1010160202@GENIA Treebank@formal@@1@S@Glucocorticoids are physiological molecules that are also extensively used in clinics as anti-inflammatory, immunosuppressive or anti-tumoral agents.@@@@1@19@@oe@19-12-2010 1010160203@GENIA Treebank@formal@@1@S@Glucocorticoids can induce apoptosis on normal lymphoid cells and play a key role in the physiology of thymic selection.@@@@1@20@@oe@19-12-2010 1010160204@GENIA Treebank@formal@@1@S@In clinics these molecules are also used for their potencies in inducing apoptosis of malignant lymphoid cells.@@@@1@18@@oe@19-12-2010 1010160205@GENIA Treebank@formal@@1@S@Glucocorticoids are mediating their effects after binding to an intracellular receptor belonging to the steroid receptor superfamily: the glucocorticoid receptor (GR).@@@@1@25@@oe@19-12-2010 1010160206@GENIA Treebank@formal@@1@S@Once activated, the GR, can mediate his effects through direct binding on the DNA or via protein/protein interactions with transcription factors.@@@@1@24@@oe@19-12-2010 1010160207@GENIA Treebank@formal@@1@S@Depending on the type of lymphocytes, the mechanism of apoptosis induced by glucocorticoids fall roughly in two categories: induction of "death genes" by the activated GR (I kappa B, c-jun) or repression of survival factors (AP-1, c-Myc).@@@@1@48@@oe@19-12-2010 1010160208@GENIA Treebank@formal@@1@S@In the case of thymic selection the mechanism is more subtle depending on the mutual repression of Nur77 and GR.@@@@1@21@@oe@19-12-2010 1010264101@GENIA Treebank@formal@@1@S@Modulation of the immune response by progesterone-induced lymphocyte factors.@@@@1@10@@oe@19-12-2010 1010264102@GENIA Treebank@formal@@1@S@Rat spleen and peripheral blood lymphocytes express progesterone receptors whose concentration is increased greatly during the early phase of pregnancy.@@@@1@21@@oe@19-12-2010 1010264103@GENIA Treebank@formal@@1@S@After stimulation of progesterone the expression of receptors was augmented 2-3 times.@@@@1@13@@oe@19-12-2010 1010264104@GENIA Treebank@formal@@1@S@When cells were cultured in the presence of progesterone they released a soluble factor that inhibited cellular immunoreactions (MLR, CRC) and cellular proliferation as measured by thymidine incorporation by spleen-cell culture.@@@@1@35@@oe@19-12-2010 1010264105@GENIA Treebank@formal@@1@S@This factor also inhibited the synthesis of anti-DNP antibodies by a mouse hybridoma and diminished the proportion of cells in phase S.@@@@1@23@@oe@19-12-2010 1010264106@GENIA Treebank@formal@@1@S@However, the percentage of asymmetric molecules produced by the hybridoma remained unaltered.@@@@1@14@@oe@19-12-2010 1010264107@GENIA Treebank@formal@@1@S@These results support the hypothesis that soluble factors released by rat lymphocytes modulate the immune response of the mother and participate in the mechanism that protects the fetus against antipaternal antibodies.@@@@1@32@@oe@19-12-2010 1010305901@GENIA Treebank@formal@@1@S@Cleavage of transcription factor SP1 by caspases during anti-IgM-induced B-cell apoptosis.@@@@1@12@@oe@19-12-2010 1010305902@GENIA Treebank@formal@@1@S@Apoptosis is instrumental in the processes generating the diversity of the B-cell repertoire.@@@@1@14@@oe@19-12-2010 1010305903@GENIA Treebank@formal@@1@S@Autoreactive B-cells are eliminated by anti-IgM crosslinking after encountering self-antigens, but precise mechanisms leading to B-cell apoptosis are still not well understood.@@@@1@24@@oe@19-12-2010 1010305904@GENIA Treebank@formal@@1@S@We report here the cleavage of the transcription factor SP1 in the human Burkitt lymphoma cell line BL60 during anti-IgM-induced apoptosis.@@@@1@22@@oe@19-12-2010 1010305905@GENIA Treebank@formal@@1@S@Western blot analysis revealed two cleavage products of approximately 68 kDa and 45 kDa after induction of apoptosis.@@@@1@19@@oe@19-12-2010 1010305906@GENIA Treebank@formal@@1@S@Cleavage could be completely inhibited by zDEVD-fmk, an inhibitor specific for caspase 3-like proteases.@@@@1@16@@oe@19-12-2010 1010305907@GENIA Treebank@formal@@1@S@In-vitro cleavage of recombinant SP1 by recombinant caspase 3 (CPP32) or caspase 7 (Mch 3) results in similar cleavage products as those observed in vivo.@@@@1@30@@oe@19-12-2010 1010305908@GENIA Treebank@formal@@1@S@Recombinant caspase 6 (Mch 2) primarily generates a 68-kDa cleavage product, as observed after calcium ionophore (CaI) induced B-cell apoptosis.@@@@1@26@@oe@19-12-2010 1010305909@GENIA Treebank@formal@@1@S@In contrast, caspase 1 (ICE) did not cleave SP1 in vitro.@@@@1@15@@oe@19-12-2010 1010305910@GENIA Treebank@formal@@1@S@The time course of SP1 cleavage during anti-IgM-induced apoptosis is paralleled by an increase of caspase activity measured by DEVD-p-nitroanilide (DEVD-pNA) cleavage.@@@@1@25@@oe@19-12-2010 1010305911@GENIA Treebank@formal@@1@S@DNA band-shift assays revealed a decrease in the intensity of the full length SP1/DNA complex and an increase in the intensity of a smaller complex due to the binding of one SP1 cleavage product.@@@@1@35@@oe@19-12-2010 1010305912@GENIA Treebank@formal@@1@S@By Edman sequencing we could identify a caspase 3 cleavage site after Asp584 (D584AQPQAGR), generating a 22-kDa C-terminal SP1 protein fragment which still contains the DNA binding site.@@@@1@32@@oe@19-12-2010 1010305913@GENIA Treebank@formal@@1@S@Our results show the cleavage of the human transcription factor SP1 in vivo and in vitro, underlining the central role of caspase 3-like proteases during the process of anti-IgM-induced apoptosis.@@@@1@32@@oe@19-12-2010 1018781201@GENIA Treebank@formal@@1@S@Spi-C, a novel Ets protein that is temporally regulated during B lymphocyte development.@@@@1@15@@oe@19-12-2010 1018781202@GENIA Treebank@formal@@1@S@A novel Ets protein was isolated by yeast one-hybrid screening of a cDNA library made from lipopolysaccharide-stimulated mouse splenic B cells, using the SP6 kappa promoter kappaY element as a bait.@@@@1@33@@oe@19-12-2010 1018781203@GENIA Treebank@formal@@1@S@The novel Ets protein was most closely related to PU.1 and Spi-B within the DNA binding Ets domain and was therefore named Spi-C.@@@@1@24@@oe@19-12-2010 1018781204@GENIA Treebank@formal@@1@S@However, Spi-C may represent a novel subgroup within the Ets protein family, as it differed significantly from Spi-B and PU.1 within helix 1 of the Ets domain.@@@@1@30@@oe@19-12-2010 1018781205@GENIA Treebank@formal@@1@S@Spi-C was encoded by a single-copy gene that was mapped to chromosome 10, region C.@@@@1@17@@oe@19-12-2010 1018781206@GENIA Treebank@formal@@1@S@Spi-C interacted with DNA similarly to PU.1 as judged by methylation interference, band-shift and site selection analysis, and activated transcription of a kappaY element reporter gene upon co-transfection of HeLa cells.@@@@1@34@@oe@19-12-2010 1018781207@GENIA Treebank@formal@@1@S@Spi-C RNA was expressed in mature B lymphocytes and at lower levels in macrophages.@@@@1@15@@oe@19-12-2010 1018781208@GENIA Treebank@formal@@1@S@Furthermore, pre-B cell and plasma cell lines were Spi-C-negative, suggesting that Spi-C might be a regulatory molecule during a specific phase of B lymphoid development.@@@@1@28@@oe@19-12-2010 1019238601@GENIA Treebank@formal@@1@S@A human IFNGR1 small deletion hotspot associated with dominant susceptibility to mycobacterial infection [see comments]@@@@1@17@@oe@19-12-2010 1019238602@GENIA Treebank@formal@@1@S@The immunogenetic basis of severe infections caused by bacille Calmette-Guerin vaccine and environmental mycobacteria in humans remains largely unknown.@@@@1@20@@oe@19-12-2010 1019238603@GENIA Treebank@formal@@1@S@We describe 18 patients from several generations of 12 unrelated families who were heterozygous for 1 to 5 overlapping IFNGR1 frameshift small deletions and a wild-type IFNGR1 allele.@@@@1@29@@oe@19-12-2010 1019238604@GENIA Treebank@formal@@1@S@There were 12 independent mutation events at a single mutation site, defining a small deletion hotspot.@@@@1@18@@oe@19-12-2010 1019238605@GENIA Treebank@formal@@1@S@Neighbouring sequence analysis favours a small deletion model of slipped mispairing events during replication.@@@@1@15@@oe@19-12-2010 1019238606@GENIA Treebank@formal@@1@S@The mutant alleles encode cell-surface IFNgamma receptors that lack the intra-cytoplasmic domain, which, through a combination of impaired recycling, abrogated signalling and normal binding to IFNgamma exert a dominant-negative effect.@@@@1@34@@oe@19-12-2010 1019238607@GENIA Treebank@formal@@1@S@We thus report a hotspot for human IFNGR1 small deletions that confer dominant susceptibility to infections caused by poorly virulent mycobacteria.@@@@1@22@@oe@19-12-2010 1019244601@GENIA Treebank@formal@@1@S@Erythroid gene expression is differentially regulated by erythropoietin, haemin and delta-aminolaevulinic acid in UT-7 cells.@@@@1@17@@oe@19-12-2010 1019244602@GENIA Treebank@formal@@1@S@Erythropoietin (Epo) is essential for the later stages of erythropoiesis, acting to promote cell survival and proliferation, but its role in differentiation remains to be defined.@@@@1@31@@oe@19-12-2010 1019244603@GENIA Treebank@formal@@1@S@The UT-7 cell line exhibits both erythroid and megakaryocytic characteristics and can be induced to differentiate along the erythroid pathway by Epo or the megakaryocytic pathway by phorbol myristic acetate.@@@@1@31@@oe@19-12-2010 1019244604@GENIA Treebank@formal@@1@S@We have compared the effects of Epo and the chemical inducers, delta-aminolaevulinic acid (delta-ALA) and haemin on the differentiation capacity of UT-7 cells.@@@@1@27@@oe@19-12-2010 1019244605@GENIA Treebank@formal@@1@S@Epo alone promoted relatively early events in erythroid maturation, without significant changes in haemoglobin production or morphology.@@@@1@19@@oe@19-12-2010 1019244606@GENIA Treebank@formal@@1@S@GATA-2 and c-myb were down-regulated by Epo, and GATA-2 was further down-modulated by the inducers.@@@@1@17@@oe@19-12-2010 1019244607@GENIA Treebank@formal@@1@S@Conversely, SCL expression was up-regulated by Epo and further increased by haemin and delta-ALA.@@@@1@16@@oe@19-12-2010 1019244608@GENIA Treebank@formal@@1@S@Epo caused an increase in the proportion of cells expressing cell surface glycophorin A (GPA) and up-regulated beta- and gamma-globin by several fold.@@@@1@26@@oe@19-12-2010 1019244609@GENIA Treebank@formal@@1@S@Both haemin and delta-ALA caused a de novo increase in alpha-globin expression as well as enhancing Epo-induced beta-globin expression, leading to a marked increase in haemoglobin production.@@@@1@29@@oe@19-12-2010 1019244610@GENIA Treebank@formal@@1@S@These results suggest that haemoglobin production in UT-7 cells is limited by a deficiency of erythroid-specific aminolaevulinic acid synthase (ALAS-E) activity or globin synthesis as a consequence of their immaturity as a multipotential cell line.@@@@1@38@@oe@19-12-2010 1019402001@GENIA Treebank@formal@@1@S@Evidence for a polyclonal etiology of palmar fibromatosis.@@@@1@9@@oe@19-12-2010 1019402002@GENIA Treebank@formal@@1@S@X chromosome inactivation patterns at the androgen receptor locus were evaluated to determine clonality in microdissected lesional tissue and in leukocytes from 2 women with Dupuytren's disease.@@@@1@29@@oe@19-12-2010 1019402003@GENIA Treebank@formal@@1@S@The tissue from both patients generated a polyclonal pattern of X chromosome inactivation of the human androgen receptor gene.@@@@1@20@@oe@19-12-2010 1019402004@GENIA Treebank@formal@@1@S@This finding supports a polyclonal reactive process as the underlying etiology for palmar fibromatosis.@@@@1@15@@oe@19-12-2010 1019537901@GENIA Treebank@formal@@1@S@Transient pseudo-hypoaldosteronism following resection of the ileum: normal level of lymphocytic aldosterone receptors outside the acute phase.@@@@1@19@@oe@19-12-2010 1019537902@GENIA Treebank@formal@@1@S@Pseudo-hypoaldosteronism (PHA) is due to mineralocorticoid resistance and manifests as hyponatremia and hyperkalemia with increased plasma aldosterone levels.@@@@1@21@@oe@19-12-2010 1019537903@GENIA Treebank@formal@@1@S@It may be familial or secondary to abnormal renal sodium handling.@@@@1@12@@oe@19-12-2010 1019537904@GENIA Treebank@formal@@1@S@We report the case of a 54-year-old woman with multifocal cancer of the colon, who developed PHA after subtotal colectomy, ileal resection and jejunostomy.@@@@1@27@@oe@19-12-2010 1019537905@GENIA Treebank@formal@@1@S@She was treated with 6 g of salt daily to prevent dehydration, which she stopped herself because of reduced fecal losses.@@@@1@23@@oe@19-12-2010 1019537906@GENIA Treebank@formal@@1@S@One month later she was admitted with signs of acute adrenal failure, i.e. fatigue, severe nausea, blood pressure of 80/60 mmHg, extracellular dehydration, hyponatremia (118 mmol/l); hyperkalemia (7.6 mmol/l), increased blood urea nitrogen (BUN) (200 mg/dl) and creatininemia (2.5 mg/dl), and decreased plasma bicarbonates level (HCO3-: 16 mmol/l; N: 27-30).@@@@1@74@@oe@19-12-2010 1019537907@GENIA Treebank@formal@@1@S@However, the plasma cortisol was high (66 microg/100 ml at 10:00 h; N: 8-15) and the ACTH was normal (13 pg/ml, N: 10-60); there was a marked increase in plasma renin activity (>37 ng/ml/h; N supine <3), active renin (869 pg/ml; N supine: 1.120), aldosterone (>2000 pg/ml; N supine <150) and plasma AVP (20 pmol/l; N: 0.5-2.5).@@@@1@88@@oe@19-12-2010 1019537908@GENIA Treebank@formal@@1@S@The plasma ANH level was 38 pmol/l (N supine: 5-25).@@@@1@14@@oe@19-12-2010 1019537909@GENIA Treebank@formal@@1@S@A urinary steroidogram resulted in highly elevated tetrahydrocortisol (THF: 13.3 mg/24h; N: 1.4+/-0.8) with no increase in tetrahydrocortisone (THE: 3.16 mg/24h; N: 2.7+/-2.0) excretion, and with low THE/THF (0.24; N: 1.87+/-0.36) and alpha THF/THF (0.35; N: 0.92+/-0.42) ratios.@@@@1@58@@oe@19-12-2010 1019537910@GENIA Treebank@formal@@1@S@The number of mineralocorticoid receptors in mononuclear leukocytes was in the lower normal range for age, while the number of glucocorticoid receptors was reduced.@@@@1@26@@oe@19-12-2010 1019537911@GENIA Treebank@formal@@1@S@Small-bowel resection in ileostomized patients causes excessive fecal sodium losses and results in chronic sodium depletion with contraction of the plasma volume and severe secondary hyperaldosteronism.@@@@1@27@@oe@19-12-2010 1019537912@GENIA Treebank@formal@@1@S@Nevertheless, this hyperaldosteronism may be associated with hyponatremia and hyperkalemia suggesting PHA related to the major importance of the colon for the absorption of sodium.@@@@1@27@@oe@19-12-2010 1019537913@GENIA Treebank@formal@@1@S@In conclusion, this case report emphasizes 1) the possibility of a syndrome of acquired PHA with severe hyperkalemia after resection of the ileum and colon responding to oral salt supplementation; 2) the major increase in AVP and the small increase in ANH; 3) the strong increase in urinary THF with low THE/THF and alpha THF/THF ratios; 4) the normal number of lymphocytic mineralocorticoid receptors outside the acute episode.@@@@1@77@@oe@19-12-2010 1019542801@GENIA Treebank@formal@@1@S@The Epstein-Barr virus nuclear antigen 2 (EBNA2), a protein required for B lymphocyte immortalization, induces the synthesis of type I interferon in Burkitt's lymphoma cell lines.@@@@1@32@@oe@19-12-2010 1019542802@GENIA Treebank@formal@@1@S@Epstein-Barr virus nuclear antigen 2 (EBNA2), a protein involved in cell transformation, interferes with the cellular response to type I interferons (IFN-alpha/beta).@@@@1@29@@oe@19-12-2010 1019542803@GENIA Treebank@formal@@1@S@We investigated the function of conditionally expressed EBNA2 in the context of the IFN response in Burkitt's lymphoma cell lines.@@@@1@22@@oe@19-12-2010 1019542804@GENIA Treebank@formal@@1@S@Expression of EBNA2 led to the transcriptional activation of both endogenous or transfected IFN-stimulated genes (ISGs), genes which contain within their promoters either the interferon-stimulated response element (ISRE) or the gamma interferon activation site (GAS).@@@@1@43@@oe@19-12-2010 1019542805@GENIA Treebank@formal@@1@S@In search of a molecular mechanism for the transcriptional induction of ISGs, we observed an EBNA2-dependent synthesis of IFN-beta mRNA at low levels and the secretion of low amounts of IFN.@@@@1@33@@oe@19-12-2010 1019542806@GENIA Treebank@formal@@1@S@A transfected IFN-beta promoter responded to EBNA2 activation, and a sequence closely resembling a RBP-Jkappa binding site was pinpointed as a potential target of EBNA2 activity.@@@@1@28@@oe@19-12-2010 1019542807@GENIA Treebank@formal@@1@S@EBNA2-dependent transcriptional induction of the IFN-beta promoter occurred in EBV-negative Burkitt's lymphoma cells, indicating that other EBV genes were not required for the induction of IFN-beta synthesis.@@@@1@30@@oe@19-12-2010 1020000701@GENIA Treebank@formal@@1@S@In vivo modulation of glucocorticoid receptor mRNA by inhaled fluticasone propionate in bronchial mucosa and blood lymphocytes in subjects with mild asthma.@@@@1@23@@oe@19-12-2010 1020000702@GENIA Treebank@formal@@1@S@BACKGROUND: In vivo regulation of the glucocorticoid receptor (GR) by glucocorticoids provides a means of modulating sensitivity of targeted cells.@@@@1@24@@oe@19-12-2010 1020000703@GENIA Treebank@formal@@1@S@OBJECTIVE: We sought to determine the in vivo modulation of GR mRNA expression by fluticasone propionate (FP) in subjects with mild asthma.@@@@1@26@@oe@19-12-2010 1020000704@GENIA Treebank@formal@@1@S@METHODS: Ten atopic asthmatic subjects were treated with FP 250 microg twice daily for 4 weeks.@@@@1@18@@oe@19-12-2010 1020000705@GENIA Treebank@formal@@1@S@Before and after treatment, the patients underwent fiberoptic bronchoscopy with endobronchial biopsy and sampling of venous blood for measurements of GR mRNA levels.@@@@1@25@@oe@19-12-2010 1020000706@GENIA Treebank@formal@@1@S@A solution hybridization assay was used for quantitative analysis of GR mRNA.@@@@1@13@@oe@19-12-2010 1020000707@GENIA Treebank@formal@@1@S@In addition, a 24-hour urinary cortisol excretion and an adrenocorticotropic hormone test before and after treatment with FP were performed.@@@@1@22@@oe@19-12-2010 1020000708@GENIA Treebank@formal@@1@S@RESULTS: A high interindividual variation in GR mRNA expression was seen.@@@@1@13@@oe@19-12-2010 1020000709@GENIA Treebank@formal@@1@S@However, we detected a significant reduction of the GR mRNA levels in the endobronchial biopsy specimens after FP treatment (36.6 +/- 23.1 and 25.0 +/- 10.9 amol GR mRNA/microg RNA, respectively; P <.01).@@@@1@40@@oe@19-12-2010 1020000710@GENIA Treebank@formal@@1@S@In the peripheral blood lymphocytes an even more striking downregulation of the GR by its cognate ligand was documented (30.3 +/- 26.5 and 8.8 +/- 5 amol GR mRNA/microg RNA, respectively; P <.001), possibly reflecting differences in glucocorticoid sensitivity between tissues.@@@@1@48@@oe@19-12-2010 1020000711@GENIA Treebank@formal@@1@S@A small but significant reduction of the 24-hour urinary cortisol excretion was observed (233 +/- 109 and 157 +/- 66 nmol/L, respectively; P <.01), whereas the feedback regulation of glucocorticoid synthesis by means of the hypothalamic-pituitary-adrenal axis as assessed by the adrenocorticotropic hormone test remained normal after treatment with FP.@@@@1@57@@oe@19-12-2010 1020000712@GENIA Treebank@formal@@1@S@CONCLUSION: The results in this study confirm the potency of the inhaled corticosteroid FP and provide evidence for a considerable tissue-specific interindividual variation in the expression of the GR.@@@@1@31@@oe@19-12-2010 1020189901@GENIA Treebank@formal@@1@S@p38 mitogen-activated protein kinase mediates signal integration of TCR/CD28 costimulation in primary murine T cells.@@@@1@16@@oe@19-12-2010 1020189902@GENIA Treebank@formal@@1@S@Optimal T cell activation requires two signals, one generated by TCR and another by the CD28 costimulatory receptor.@@@@1@20@@oe@19-12-2010 1020189903@GENIA Treebank@formal@@1@S@In this study, we investigated the regulation of costimulation-induced mitogen-activated protein kinase (MAPK) activation in primary mouse T cells.@@@@1@23@@oe@19-12-2010 1020189904@GENIA Treebank@formal@@1@S@In contrast to that reported for human Jurkat T cells, we found that p38 MAPK, but not Jun NH2-terminal kinase (JNK), is weakly activated upon stimulation with either anti-CD3 or anti-CD28 in murine thymocytes and splenic T cells.@@@@1@44@@oe@19-12-2010 1020189905@GENIA Treebank@formal@@1@S@However, p38 MAPK is activated strongly and synergistically by either CD3/CD28 coligation or PMA/Ca2+ ionophore stimulation, which mimics TCR-CD3/CD28-mediated signaling.@@@@1@23@@oe@19-12-2010 1020189906@GENIA Treebank@formal@@1@S@Activation of p38 MAPK correlates closely with the stimulation of T cell proliferation.@@@@1@14@@oe@19-12-2010 1020189907@GENIA Treebank@formal@@1@S@In contrast, PMA-induced JNK activation is inhibited by Ca2+ ionophore.@@@@1@12@@oe@19-12-2010 1020189908@GENIA Treebank@formal@@1@S@T cell proliferation and production of IL-2, IL-4, and IFN-gamma induced by both CD3 and CD3/CD28 ligation and the nuclear expression of the c-Jun and ATF-2 proteins are each blocked by the p38 MAPK inhibitor SB203580.@@@@1@39@@oe@19-12-2010 1020189909@GENIA Treebank@formal@@1@S@Our findings demonstrate that p38 MAPK 1) plays an important role in signal integration during costimulation of primary mouse T cells, 2) may be involved in the induction of c-Jun activation and augmentation of AP-1 transcriptional activity, and 3) regulates whether T cells enter a state of functional unresponsiveness.@@@@1@55@@oe@19-12-2010 1020198401@GENIA Treebank@formal@@1@S@The functional synergy between IL-12 and IL-2 involves p38 mitogen-activated protein kinase and is associated with the augmentation of STAT serine phosphorylation.@@@@1@23@@oe@19-12-2010 1020198402@GENIA Treebank@formal@@1@S@IL-12 and IL-2 can stimulate mitogen- or CD3-activated T cells to proliferate, produce IFN-gamma, and kill tumor cells.@@@@1@21@@oe@19-12-2010 1020198403@GENIA Treebank@formal@@1@S@The magnitude of these functional responses is greatly augmented when T cells are activated by the combination of IL-12 and IL-2.@@@@1@22@@oe@19-12-2010 1020198404@GENIA Treebank@formal@@1@S@Although peripheral blood T cells are largely unresponsive to these cytokines without prior activation, a small subset of CD8+ T cells (CD8+CD18bright) is strongly activated by the combination of IL-12 and IL-2.@@@@1@36@@oe@19-12-2010 1020198405@GENIA Treebank@formal@@1@S@In this report we show that the functional synergy between IL-12 and IL-2 in CD8+CD18bright T cells correlates with the activation of the stress kinases, p38 mitogen-activated protein (MAP) kinase and stress-activated protein kinase (SAPK)/Jun N-terminal kinase, but not with the activation of the extracellular signal-regulated kinases.@@@@1@55@@oe@19-12-2010 1020198406@GENIA Treebank@formal@@1@S@The functional synergy between IL-2 and IL-12 is also associated with a prominent increase in STAT1 and STAT3 serine phosphorylation over that observed with IL-12 or IL-2 alone.@@@@1@29@@oe@19-12-2010 1020198407@GENIA Treebank@formal@@1@S@By contrast, STAT tyrosine phosphorylation is not augmented over that seen with either cytokine alone.@@@@1@17@@oe@19-12-2010 1020198408@GENIA Treebank@formal@@1@S@A specific inhibitor of p38 MAP kinase completely inhibits the serine phosphorylation of STAT1 and STAT3 induced by IL-12 and IL-2 and abrogates the functional synergy between IL-12 and IL-2 without affecting STAT tyrosine phosphorylation.@@@@1@36@@oe@19-12-2010 1020198409@GENIA Treebank@formal@@1@S@This suggests that p38 MAP kinase may play an important role in regulating STAT serine phosphorylation in response to the combination of IL-12 and IL-2.@@@@1@26@@oe@19-12-2010 1020198410@GENIA Treebank@formal@@1@S@Furthermore, these findings indicate that the optimal activation of T cells by IL-12 and IL-2 may depend on an interaction between the p38 MAP kinase and Janus kinase/STAT signaling pathways.@@@@1@32@@oe@19-12-2010 1020702301@GENIA Treebank@formal@@1@S@Modulation of E2F complexes during G0 to S phase transition in human primary B-lymphocytes.@@@@1@15@@oe@19-12-2010 1020702302@GENIA Treebank@formal@@1@S@The pocket protein-E2F complexes are convergence points for cell cycle signaling.@@@@1@12@@oe@19-12-2010 1020702303@GENIA Treebank@formal@@1@S@In the present report, we identified and monitored the pocket protein-E2F complexes in human primary B-lymphocytes after activation by phorbol 12-myristate 13-acetate.@@@@1@24@@oe@19-12-2010 1020702304@GENIA Treebank@formal@@1@S@Consistent with previous data from human and mouse fibroblasts and T-lymphocytes, E2F4 and DP1 form the predominant E2F heterodimers both in G0 and G1 phases of the human B-lymphocyte cell cycle, whereas E2F1 and -3 are first detected in late G1, and their expression levels increase towards S phase.@@@@1@53@@oe@19-12-2010 1020702305@GENIA Treebank@formal@@1@S@Intriguingly, the major E2F complex that we detected in quiescent human B-lymphocytes is consisted of pRB, E2F4, and DP1.@@@@1@23@@oe@19-12-2010 1020702306@GENIA Treebank@formal@@1@S@Though the levels of DP1 and -2 increase when cells progress from G0 to S, the proportion of DP1 to DP2 remains relatively constant during the cell cycle.@@@@1@30@@oe@19-12-2010 1020702307@GENIA Treebank@formal@@1@S@We also observed an increase in electrophoretic mobility of the predominant E2F components, DP1 and E2F4, as B-lymphocytes progressed from G0 into early G1.@@@@1@27@@oe@19-12-2010 1020702308@GENIA Treebank@formal@@1@S@This increase in mobility was attributable to dephosphorylation, as lambda phosphatase treatment could convert the slower migrating forms into the corresponding faster mobility forms.@@@@1@26@@oe@19-12-2010 1020702309@GENIA Treebank@formal@@1@S@We further demonstrated that this change in phosphorylation status correlates with a decrease in DNA binding activity.@@@@1@18@@oe@19-12-2010 1020702310@GENIA Treebank@formal@@1@S@This modulation of DNA binding activity mediated through the dephosphorylation of DP1 and E2F4 could help to explain the lack of in vivo DNA footprinting in late G1 and S phases of gene promoters negatively regulated through E2F sites and suggests a novel mechanism for controlling E2F transcriptional activity during the transition from quiescence to proliferation.@@@@1@57@@oe@19-12-2010 1020706101@GENIA Treebank@formal@@1@S@Retinoid X receptor (RXR) agonist-induced activation of dominant-negative RXR-retinoic acid receptor alpha403 heterodimers is developmentally regulated during myeloid differentiation.@@@@1@22@@oe@19-12-2010 1020706102@GENIA Treebank@formal@@1@S@The multiple biologic activities of retinoic acid (RA) are mediated through RAR and retinoid X receptor (RXR) nuclear receptors that interact with specific DNA target sequences as heterodimers (RXR-RAR) or homodimers (RXR-RXR).@@@@1@41@@oe@19-12-2010 1020706103@GENIA Treebank@formal@@1@S@RA receptor activation appears critical to regulating important aspects of hematopoiesis, since transducing a COOH-terminally truncated RARalpha exhibiting dominant-negative activity (RARalpha403) into normal mouse bone marrow generates hematopoietic growth factor-dependent cell lines frozen at the multipotent progenitor (EML) or committed promyelocyte (MPRO) stages.@@@@1@51@@oe@19-12-2010 1020706104@GENIA Treebank@formal@@1@S@Nevertheless, relatively high, pharmacological concentrations of RA (1 to 10 &mgr;M) overcome these differentiation blocks and induce terminal granulocytic differentiation of the MPRO promyelocytes while potentiating interleukin-3 (IL-3)-induced commitment of EML cells to the granulocyte/monocyte lineage.@@@@1@47@@oe@19-12-2010 1020706105@GENIA Treebank@formal@@1@S@In the present study, we utilized RXR- and RAR-specific agonists and antagonists to determine how RA overcomes the dominant-negative activity of the truncated RARalpha in these different myeloid developmental stages.@@@@1@32@@oe@19-12-2010 1020706106@GENIA Treebank@formal@@1@S@Unexpectedly, we observed that an RXR-specific, rather than an RAR-specific, agonist induces terminal granulocytic differentiation of MPRO promyelocytes, and this differentiation is associated with activation of DNA response elements corresponding to RAR-RXR heterodimers rather than RXR-RXR homodimers.@@@@1@42@@oe@19-12-2010 1020706107@GENIA Treebank@formal@@1@S@This RXR agonist activity is blocked by RAR-specific antagonists, suggesting extensive cross-talk between the partners of the RXR -RARalpha403 heterodimer.@@@@1@21@@oe@19-12-2010 1020706108@GENIA Treebank@formal@@1@S@In contrast, in the more immature, multipotent EML cells we observed that this RXR-specific agonist is inactive either in potentiating IL-3-mediated commitment of EML cells to the granulocyte lineage or in transactivating RAR-RXR response elements.@@@@1@38@@oe@19-12-2010 1020706109@GENIA Treebank@formal@@1@S@RA- triggered GALdbd-RARalpha hybrid activity in these cells indicates that the multipotent EML cells harbor substantial nuclear hormone receptor coactivator activity.@@@@1@21@@oe@19-12-2010 1020706110@GENIA Treebank@formal@@1@S@However, the histone deacetylase (HDAC) inhibitor trichostatin A readily activates an RXR-RAR reporter construct in the multipotent EML cells but not in the committed MPRO promyelocytes, indicating that differences in HDAC-containing repressor complexes in these two closely related but distinct hematopoietic lineages might account for the differential activation of the RXR-RARalpha403 heterodimers that we observed at these different stages of myeloid development.@@@@1@67@@oe@19-12-2010 1020846101@GENIA Treebank@formal@@1@S@Bcl-6 expression in reactive follicular hyperplasia, follicular lymphoma, and angioimmunoblastic T-cell lymphoma with hyperplastic germinal centers: heterogeneity of intrafollicular T-cells and their altered distribution in the pathogenesis of angioimmunoblastic T-cell lymphoma.@@@@1@35@@oe@19-12-2010 1020846102@GENIA Treebank@formal@@1@S@BACKGROUND: The Bcl-6 gene product, a nuclear phosphoprotein, is expressed independently of Bcl-6 gene rearrangement.@@@@1@19@@oe@19-12-2010 1020846103@GENIA Treebank@formal@@1@S@In lymph nodes, expression of Bcl-6 protein is restricted to germinal center (GC) B-cells and 10% to 15% of CD3/CD4+ intrafollicular T cells.@@@@1@29@@oe@19-12-2010 1020846104@GENIA Treebank@formal@@1@S@Interfollicular cells are negative for Bcl-6 protein, except for rare CD3+/CD4+ T cells.@@@@1@15@@oe@19-12-2010 1020846105@GENIA Treebank@formal@@1@S@Recently, we reported cases of angioimmunoblastic T-cell lymphoma (AITL) with hyperplastic GCs (AITL/GC), and observed that borders of enlarged GCs were ill defined, with features suggestive of an outward migration of GC cells to surrounding interfollicular zones.@@@@1@45@@oe@19-12-2010 1020846106@GENIA Treebank@formal@@1@S@This prompted a study of follicular borders with Bcl-6 staining in reactive follicular hyperplasias and follicular lymphomas to compare with AITL/GC.@@@@1@22@@oe@19-12-2010 1020846107@GENIA Treebank@formal@@1@S@MATERIALS AND METHODS: Formalin-fixed paraffin sections were used for immunostaining of Bcl-6.@@@@1@14@@oe@19-12-2010 1020846108@GENIA Treebank@formal@@1@S@Six cases of AITL/GC, 12 nonspecific reactive follicular hyperplasia (FH), 7 HIV adenopathy, 10 follicular lymphoma (FL), and 8 typical AITL (ie, AITL without GC) were studied.@@@@1@39@@oe@19-12-2010 1020846109@GENIA Treebank@formal@@1@S@Double staining for Bcl-6/CD20, Bcl-6/CD3, and Bcl-6/CD57 was performed in selected cases.@@@@1@15@@oe@19-12-2010 1020846110@GENIA Treebank@formal@@1@S@RESULTS: In FH and HIV adenopathy, staining for Bcl-6 revealed densely populated GCs with well-defined and regular GC borders, whereas Bcl-6+ cells were rare in the interfollicular areas.@@@@1@32@@oe@19-12-2010 1020846111@GENIA Treebank@formal@@1@S@An occasional GC with an ill-defined border was invariably surrounded by a broad mantle zone; those with indistinct mantle zones had well-defined, regular borders.@@@@1@27@@oe@19-12-2010 1020846112@GENIA Treebank@formal@@1@S@In FL, follicles were densely populated, and their borders were irregular, with some Bcl-6+ cells in the interfollicular zones.@@@@1@23@@oe@19-12-2010 1020846113@GENIA Treebank@formal@@1@S@In AITL/GC, GCs were less dense, GC borders were ill defined and irregular, and the number of interfollicular Bcl-6+ cells was markedly increased.@@@@1@27@@oe@19-12-2010 1020846114@GENIA Treebank@formal@@1@S@Double staining revealed that these interfollicular Bcl-6+ cells in AITL/GC were Bcl6+/CD3+/CD20-/CD57- T cells.@@@@1@15@@oe@19-12-2010 1020846115@GENIA Treebank@formal@@1@S@Moreover, CD3+ intrafollicular T cells were depleted in AITL/GC, whereas they were abundant in FH.@@@@1@18@@oe@19-12-2010 1020846116@GENIA Treebank@formal@@1@S@Intrafollicular CD57+ cells did not stain for Bcl-6, and were also depleted in AITL/GC.@@@@1@16@@oe@19-12-2010 1020846117@GENIA Treebank@formal@@1@S@In typical AITL, some neoplastic cells were positive for Bcl-6, showing variable degrees of staining.@@@@1@18@@oe@19-12-2010 1020846118@GENIA Treebank@formal@@1@S@CONCLUSIONS: (1) GCs of AITL/GC differed from those of other reactive follicular hyperplasias and follicular lymphomas, and staining for Bcl-6 was useful to discern them.@@@@1@30@@oe@19-12-2010 1020846119@GENIA Treebank@formal@@1@S@(2) Intrafollicular CD3+ T cells, many of which were also positive for Bcl-6, were markedly depleted in AITL/GC, with increased interfollicular Bcl-6+/CD3+ cells, suggesting an outward migration of intrafollicular T cells in this condition.@@@@1@41@@oe@19-12-2010 1020846120@GENIA Treebank@formal@@1@S@(3) Interfollicular Bcl-6+/CD3+ cells in AITL/GC were too numerous to be accounted for by migration alone, suggesting local proliferation.@@@@1@23@@oe@19-12-2010 1020846121@GENIA Treebank@formal@@1@S@(4) Intrafollicular CD57+ cells were negative for Bcl-6, indicating heterogeneity of the intrafollicular T-cell population.@@@@1@19@@oe@19-12-2010 1020846122@GENIA Treebank@formal@@1@S@(5) Some neoplastic cells in AITL stained for Bcl-6, suggesting up-regulation of Bcl-6 expression in this tumor.@@@@1@21@@oe@19-12-2010 1021032201@GENIA Treebank@formal@@1@S@Retinoic acid induces apoptosis of human CD34+ hematopoietic progenitor cells: involvement of retinoic acid receptors and retinoid X receptors depends on lineage commitment of the hematopoietic progenitor cells.@@@@1@30@@oe@19-12-2010 1021032202@GENIA Treebank@formal@@1@S@Retinoids are bifunctional regulators of growth and differentiation of hematopoietic cells.@@@@1@12@@oe@19-12-2010 1021032203@GENIA Treebank@formal@@1@S@In this study we explored the effects of retinoic acid (RA) on apoptosis of human CD34+ hematopoietic progenitor cells isolated from normal bone marrow.@@@@1@27@@oe@19-12-2010 1021032204@GENIA Treebank@formal@@1@S@RA (100 nM) induced an increase in the percentage of dead cells from 24% to 44% at day 6 (p < 0.05, n = 6) as compared to control cells cultured in medium alone.@@@@1@42@@oe@19-12-2010 1021032205@GENIA Treebank@formal@@1@S@The effect was dose dependent and appeared relatively late.@@@@1@10@@oe@19-12-2010 1021032206@GENIA Treebank@formal@@1@S@Significant differences were observed from day 4 onward.@@@@1@9@@oe@19-12-2010 1021032207@GENIA Treebank@formal@@1@S@Apoptosis, or programmed cell death, was demonstrated as the mode of cell death by using the TUNEL assay, which detects single strand nicks in DNA, or by the Nicoletti technique demonstrating a subdiploid population by DNA staining.@@@@1@42@@oe@19-12-2010 1021032208@GENIA Treebank@formal@@1@S@RA previously was found to inhibit granulocyte colony-stimulating factor--and not granulocyte-macrophage colony-stimulating factor--stimulated proliferation of CD34+ cells.@@@@1@22@@oe@19-12-2010 1021032209@GENIA Treebank@formal@@1@S@However, we found that RA opposed anti-apoptotic effects of G-CSF and GM-CSF on CD34+ cells (G-CSF: 8% dead cells at day 6; G-CSF + RA: 20%; GM-CSF: 12%; GM-CSF + RA: 27%).@@@@1@47@@oe@19-12-2010 1021032210@GENIA Treebank@formal@@1@S@Moreover, RA induced apoptosis of CD34+ cells and CD34+CD71+ cells stimulated with erythropoietin.@@@@1@15@@oe@19-12-2010 1021032211@GENIA Treebank@formal@@1@S@To explore the receptor signaling pathways involved in RA-induced apoptosis, we used selective ligands for retinoic acid receptors (RARs; RO13-7410) and retinoid X receptors (RXRs; RO 25-6603).@@@@1@35@@oe@19-12-2010 1021032212@GENIA Treebank@formal@@1@S@We found that RARs were involved in RA-mediated apoptosis of myeloid progenitor cells, whereas RARs as well as RXRs were involved in RA-mediated apoptosis of erythroid progenitor cells.@@@@1@30@@oe@19-12-2010 1021238901@GENIA Treebank@formal@@1@S@Dicarba-closo-dodecaboranes as a pharmacophore.@@@@1@5@@oe@19-12-2010 1021238902@GENIA Treebank@formal@@1@S@Retinoidal antagonists and potential agonists.@@@@1@6@@oe@19-12-2010 1021238903@GENIA Treebank@formal@@1@S@Synthesis and biological evaluation of the first dicarba-closo-dodecaborane (carborane) derivatives of retinoids are described.@@@@1@17@@oe@19-12-2010 1021238904@GENIA Treebank@formal@@1@S@Their retinoidal activity were examined in terms of the differentiation-inducing ability toward human promyelocytic leukemia HL-60 cells.@@@@1@18@@oe@19-12-2010 1021238905@GENIA Treebank@formal@@1@S@High retinoidal activity (agonist or antagonist for retinoic acid receptor (RAR) requires a carboxylic acid moiety and an appropriate hydrophobic group located at a suitable position on the molecule.@@@@1@33@@oe@19-12-2010 1021238906@GENIA Treebank@formal@@1@S@The 4-carboranyl-substituted compounds (7, 11) showed antagonistic activity but no agonistic activity even in the presence of the potent synergist HX630.@@@@1@25@@oe@19-12-2010 1021238907@GENIA Treebank@formal@@1@S@On the other hand, the 3-carboranyl-substituted compounds (8, 12) showed potential agonistic activity, but no antagonistic activity.@@@@1@23@@oe@19-12-2010 1021238908@GENIA Treebank@formal@@1@S@The results indicates that carboranes are applicable as the hydrophobic moiety of biologically active molecules.@@@@1@16@@oe@19-12-2010 1021485401@GENIA Treebank@formal@@1@S@Modulation of the immune response and tumor growth by activated Ras.@@@@1@12@@oe@19-12-2010 1021485402@GENIA Treebank@formal@@1@S@As a result of its transforming abilities, activated Ras is expressed in a great number of cancers.@@@@1@19@@oe@19-12-2010 1021485403@GENIA Treebank@formal@@1@S@The ras mutation frequency varies between 95% in pancreatic cancer and 5% in breast cancer.@@@@1@18@@oe@19-12-2010 1021485404@GENIA Treebank@formal@@1@S@In leukemia, the highest frequency (30%) is found in acute myeloid leukemia.@@@@1@17@@oe@19-12-2010 1021485405@GENIA Treebank@formal@@1@S@The presence of ras mutations has been correlated with a poor prognosis and negative clinical outcome.@@@@1@17@@oe@19-12-2010 1021485406@GENIA Treebank@formal@@1@S@This suggests that mutated Ras activates mechanisms, which favor tumor growth, enhance the metastatic capacity of tumors or modulate tumor-specific immune responses.@@@@1@25@@oe@19-12-2010 1021485407@GENIA Treebank@formal@@1@S@Several new functions of Ras, such as downregulation of major histocompatibility complex molecules, upregulation of certain cytokines, growth factors and degradative enzymes have been uncovered in the last decade.@@@@1@33@@oe@19-12-2010 1021485408@GENIA Treebank@formal@@1@S@Additionally, mutated Ras can also serve as a primary target for the development of immunotherapy or drug therapy.@@@@1@20@@oe@19-12-2010 1021485409@GENIA Treebank@formal@@1@S@This review will discuss the mechanisms by which Ras expressing tumors are able to evade destruction by the immune system and enhance their growth and metastatic potential.@@@@1@28@@oe@19-12-2010 1021485410@GENIA Treebank@formal@@1@S@It will further elaborate on the attempts to develop successful immunotherapy and drug therapy targeting Ras expressing tumors.@@@@1@19@@oe@19-12-2010 1021607101@GENIA Treebank@formal@@1@S@Expression of E2A-HLF chimeric protein induced T-cell apoptosis, B-cell maturation arrest, and development of acute lymphoblastic leukemia.@@@@1@20@@oe@19-12-2010 1021607102@GENIA Treebank@formal@@1@S@The E2A-HLF fusion gene, generated by t(17;19)(q22;p13) in acute lymphoblastic leukemia (ALL), encodes a chimeric transcription factor in which the trans-activating domains of E2A are fused to the DNA- binding and dimerization domains of hepatic leukemic factor (HLF).@@@@1@44@@oe@19-12-2010 1021607103@GENIA Treebank@formal@@1@S@To investigate its biological role, we generated transgenic mice expressing E2A-HLF using Ig enhancer and promoter, which direct transgene expression in cells committed to the lymphoid lineage.@@@@1@30@@oe@19-12-2010 1021607104@GENIA Treebank@formal@@1@S@The transgenic mice exhibited abnormal development in the thymus and spleen and were susceptible to infection.@@@@1@17@@oe@19-12-2010 1021607105@GENIA Treebank@formal@@1@S@The thymus contained small numbers of thymocytes, and TUNEL staining showed that higher population of thymocytes were undergoing apoptosis.@@@@1@21@@oe@19-12-2010 1021607106@GENIA Treebank@formal@@1@S@The spleen exhibited a marked reduction in splenic lymphocytes and the flow cytometric analyses and the in vitro colony formation assays showed that the B-cell maturation was blocked at a very early developmental stage.@@@@1@35@@oe@19-12-2010 1021607107@GENIA Treebank@formal@@1@S@These findings indicated that the expression of E2A-HLF induced T-cell apoptosis and B-cell maturation arrest in vivo and that the susceptibility of the transgenic mice to infection was due to immunodeficiency.@@@@1@32@@oe@19-12-2010 1021607108@GENIA Treebank@formal@@1@S@Moreover, several transgenic mice developed acute leukemia, classified as T-ALL based on the surface marker analysis and DNA rearrangements, suggesting that an additional event is required for malignant transformation of lymphoid cells expressing E2A-HLF.@@@@1@38@@oe@19-12-2010 1021607109@GENIA Treebank@formal@@1@S@Our findings provide insight into the biological function of E2A-HLF in lymphoid development and also its role in leukemogenesis.@@@@1@20@@oe@19-12-2010 1022125001@GENIA Treebank@formal@@1@S@Leukocyte populations, hormone receptors and apoptosis in eutopic and ectopic first trimester human pregnancies.@@@@1@16@@oe@19-12-2010 1022125002@GENIA Treebank@formal@@1@S@The implantation of trophoblast cells at extrauterine sites still results in decidualization.@@@@1@13@@oe@19-12-2010 1022125003@GENIA Treebank@formal@@1@S@The objective of the present study was to compare decidualization at eutopic and ectopic implantation sites.@@@@1@17@@oe@19-12-2010 1022125004@GENIA Treebank@formal@@1@S@Tissues from women undergoing elective termination of uterine pregnancy and from women with ectopic pregnancy were used to detect the presence of cells important for the maintenance of pregnancy, such as BCL-2+, CD56+, CD3+, CD8+ and CD68+ cells, and the presence of oestrogen (ER) and progesterone receptors (PR) by immunohistochemistry.@@@@1@60@@oe@19-12-2010 1022125005@GENIA Treebank@formal@@1@S@In-situ detection of fragmented DNA was performed to identify apoptotic cells.@@@@1@12@@oe@19-12-2010 1022125006@GENIA Treebank@formal@@1@S@The percentage of CD3+ cells among all immunocompetent cells in the tubal epithelium was 46.6% (39.9% of CD3+ were also CD8+); the other 53.4% were CD68+ cells.@@@@1@34@@oe@19-12-2010 1022125007@GENIA Treebank@formal@@1@S@CD56+ cells were undetectable in ectopic decidua at the feto-maternal interface in ectopic tissue.@@@@1@15@@oe@19-12-2010 1022125008@GENIA Treebank@formal@@1@S@In uterine decidua, we found 29.9% CD3+ cells (2.2% of CD3+ were CD8+), 51.6% CD56+ cells and 18.5% CD68+ cells.@@@@1@29@@oe@19-12-2010 1022125009@GENIA Treebank@formal@@1@S@The ratio of BCL2+ to CD3+ cells in ectopic pregnancy was 0.41.@@@@1@13@@oe@19-12-2010 1022125010@GENIA Treebank@formal@@1@S@In uterine pregnancy, the ratio of BCL-2 to CD3 was 0.44 and 0.39 for CD56.@@@@1@17@@oe@19-12-2010 1022125011@GENIA Treebank@formal@@1@S@Tissues from both ectopic and uterine pregnancies were positive for PR.@@@@1@12@@oe@19-12-2010 1022125012@GENIA Treebank@formal@@1@S@Fewer apoptotic cell bodies were present in ectopic pregnancy.@@@@1@10@@oe@19-12-2010 1022125013@GENIA Treebank@formal@@1@S@The use of tissue obtained from ectopic pregnancy may become an excellent model to identify the mechanism of trophoblast invasion in eutopic pregnancies.@@@@1@24@@oe@19-12-2010 1022413501@GENIA Treebank@formal@@1@S@Differential inhibition of Smad6 and Smad7 on bone morphogenetic protein- and activin-mediated growth arrest and apoptosis in B cells.@@@@1@20@@oe@19-12-2010 1022413502@GENIA Treebank@formal@@1@S@Smad6 and Smad7 prevent ligand-induced activation of signal-transducing Smad proteins in the transforming growth factor-beta family.@@@@1@17@@oe@19-12-2010 1022413503@GENIA Treebank@formal@@1@S@Here we demonstrate that both Smad6 and Smad7 are human bone morphogenetic protein-2 (hBMP-2)-inducible antagonists of hBMP-2-induced growth arrest and apoptosis in mouse B cell hybridoma HS-72 cells.@@@@1@32@@oe@19-12-2010 1022413504@GENIA Treebank@formal@@1@S@Moreover, we confirmed that the ectopic expressions of Smad6 and Smad7 inhibited the hBMP-2-induced Smad1/Smad5 phosphorylation.@@@@1@18@@oe@19-12-2010 1022413505@GENIA Treebank@formal@@1@S@We previously reported that Smad7 is an activin A-inducible antagonist of activin A-induced growth arrest and apoptosis in HS-72 cells.@@@@1@21@@oe@19-12-2010 1022413506@GENIA Treebank@formal@@1@S@Interestingly, although mRNA expression of Smad6 was induced by activin A in HS-72 cells, Smad6 showed no antagonistic effect on activin A-induced growth arrest and apoptosis.@@@@1@29@@oe@19-12-2010 1022413507@GENIA Treebank@formal@@1@S@Moreover, we found that the ectopic expression of Smad7, but not Smad6, inhibited the activin A-induced Smad2 phosphorylation in HS-72 cells.@@@@1@25@@oe@19-12-2010 1022413508@GENIA Treebank@formal@@1@S@Thus, Smad6 and Smad7 exhibit differential inhibitory effects in bone morphogenetic protein-2- and activin A-mediated signaling in B lineage cells.@@@@1@22@@oe@19-12-2010 1022415601@GENIA Treebank@formal@@1@S@Transcription factors Sp1 and AP-2 mediate induction of acid sphingomyelinase during monocytic differentiation.@@@@1@14@@oe@19-12-2010 1022415602@GENIA Treebank@formal@@1@S@Cells from the human monocytic leukemia cell line THP-1 differentiate towards a macrophage-like phenotype when stimulated with phorbol 12-myristate -13- acetate (PMA), 1,25-dihydroxy-vitamin D3, and various other agents.@@@@1@31@@oe@19-12-2010 1022415603@GENIA Treebank@formal@@1@S@We demonstrate here that the expression of the lysosomal enzyme acid sphingomyelinase (ASM; E.C.3.1.4.12) is induced during this process and is strongly elevated in differentiated THP-1 cells, as well as in differentiated human mononuclear phagocytes.@@@@1@40@@oe@19-12-2010 1022415604@GENIA Treebank@formal@@1@S@Using Northern blotting, RNase protection assay, and nuclear run-on analyses, we show that the up-regulation of ASM expression is regulated mainly at the level of transcription and that new protein synthesis is required for enhanced ASM activity.@@@@1@41@@oe@19-12-2010 1022415605@GENIA Treebank@formal@@1@S@This cell-type specific induction by PMA treatment was further investigated with respect to transcriptional control.@@@@1@16@@oe@19-12-2010 1022415606@GENIA Treebank@formal@@1@S@A series of 5' deletion derivatives of the upstream regulatory region were used in transient transfection assays to identify promoter elements required for basal and inducible gene expression.@@@@1@29@@oe@19-12-2010 1022415607@GENIA Treebank@formal@@1@S@A PMA responsive element was localized to a region between -319 and -219 bp upstream of the initiation codon and co-transfections with transcription factor expression plasmids for AP-2 and Sp1 resulted in augmented ASM promoter activity, which was abolished when the binding sites for these two factors were deleted.@@@@1@51@@oe@19-12-2010 1022415608@GENIA Treebank@formal@@1@S@Using electrophoretic mobility shift assays and supershift assays we demonstrate that this region is specifically bound by Sp1 and AP-2.@@@@1@21@@oe@19-12-2010 1022415609@GENIA Treebank@formal@@1@S@These factors are present in nuclear extracts prepared from both induced and uninduced THP-1 cells.@@@@1@16@@oe@19-12-2010 1022415610@GENIA Treebank@formal@@1@S@However, the intensity of the complex formed appeared to increase when nuclear extracts from PMA-treated cells were used.@@@@1@20@@oe@19-12-2010 1022415611@GENIA Treebank@formal@@1@S@From these studies, we conclude that a concerted action of the transcription factors AP-2 and Sp1 is essential for the up -regulation of ASM expression during the process of macrophage differentiation.@@@@1@32@@oe@19-12-2010 1022422301@GENIA Treebank@formal@@1@S@Estrogen and progesterone induction of survival of monoblastoid cells undergoing TNF-alpha-induced apoptosis.@@@@1@13@@oe@19-12-2010 1022422302@GENIA Treebank@formal@@1@S@Induction of apoptosis of mononucleated cells is a physiological process for regulating the intensity of the immune response.@@@@1@19@@oe@19-12-2010 1022422303@GENIA Treebank@formal@@1@S@The female steroid hormones estrogen (E2) and progesterone (Prog) are known to modulate the reactivity of the immune system; recently it has been demonstrated that they can regulate induction of apoptosis of endothelial cells and osteoblasts.@@@@1@42@@oe@19-12-2010 1022422304@GENIA Treebank@formal@@1@S@TNF-alpha-mediated induction of apoptosis has been well characterized in myeloid cells.@@@@1@12@@oe@19-12-2010 1022422305@GENIA Treebank@formal@@1@S@We investigated whether E2 and Prog could interfere with TNF-alpha-induced apoptosis of the monoblastoid U937 cell line.@@@@1@18@@oe@19-12-2010 1022422306@GENIA Treebank@formal@@1@S@Treatment with E2 or Prog increased survival and prevented apoptosis induced by TNF-alpha in both undifferentiated and macrophage-like PMA-differentiated U937 cells, as assessed by trypan blue exclusion cell counting, thymidine incorporation, AnnexinV labeling, followed by flow cytometry and DNA fragmentation studies.@@@@1@46@@oe@19-12-2010 1022422307@GENIA Treebank@formal@@1@S@This effect can be associated with the activation of specific hormone receptors, since we observed the expression of the estrogen receptor alpha (ER-alpha), ER-beta, and progesterone receptor (PR) mRNAs; the ER-alpha protein expression was confirmed by immunocytochemical analysis.@@@@1@47@@oe@19-12-2010 1022422308@GENIA Treebank@formal@@1@S@In addition, hormone-mediated survival against apoptosis was concentration dependent, reaching the half-maximal effect at 10 nM and blocked by the ER antagonist ICI 182,780 in undifferentiated cells, further supporting a receptor-mediated mechanism of cell survival.@@@@1@41@@oe@19-12-2010 1022422309@GENIA Treebank@formal@@1@S@Other steroid receptor drugs such as Raloxifene, RU486, or the ICI 182,780 in PMA-differentiated cells displayed agonist activity by preventing TNF-alpha-induced apoptosis as efficiently as the hormones alone, providing further evidence to the notion that steroid receptor drugs may manifest agonist or antagonist activities depending on the cellular context in which they are studied.@@@@1@60@@oe@19-12-2010 1022422310@GENIA Treebank@formal@@1@S@Treatment with E2 was also associated with a time-dependent decrease in the mRNA level of the proapoptotic Nip-2 protein, supporting the hypothesis that hormone responsiveness of U937 cells is mediated by target gene transcription.@@@@1@36@@oe@19-12-2010 1022422311@GENIA Treebank@formal@@1@S@Together, these results demonstrate that ER and PR can be activated by endogenous or exogenous ligands to induce a genetic response that impairs TNF-alpha-induced apoptosis in U937 cells.@@@@1@30@@oe@19-12-2010 1022422312@GENIA Treebank@formal@@1@S@The data presented here suggest that the female steroid receptors play a role in regulation of the immune response by preventing apoptosis of monoblastoid cells; this effect might have important consequences in the clinical use of steroid receptor drugs.@@@@1@41@@oe@19-12-2010 1022422313@GENIA Treebank@formal@@1@S@--Vegeto, E., Pollio, G., Pellicciari, C., Maggi, A.@@@@1@17@@oe@19-12-2010 1022422314@GENIA Treebank@formal@@1@S@Estrogen and progesterone induction of survival of monoblastoid cells undergoing TNF-alpha-inuced apoptosis.@@@@1@13@@oe@19-12-2010 1022427801@GENIA Treebank@formal@@1@S@Grf40, A novel Grb2 family member, is involved in T cell signaling through interaction with SLP-76 and LAT.@@@@1@21@@oe@19-12-2010 1022427802@GENIA Treebank@formal@@1@S@We molecularly cloned a new Grb2 family member, named Grf40, containing the common SH3-SH2-SH3 motif.@@@@1@18@@oe@19-12-2010 1022427803@GENIA Treebank@formal@@1@S@Expression of Grf40 is predominant in hematopoietic cells, particularly T cells.@@@@1@13@@oe@19-12-2010 1022427804@GENIA Treebank@formal@@1@S@Grf40 binds to the SH2 domain-containing leukocyte protein of 76 kD (SLP-76) via its SH3 domain more tightly than Grb2.@@@@1@23@@oe@19-12-2010 1022427805@GENIA Treebank@formal@@1@S@Incidentally, Grf40 binds to linker for activation of T cells (LAT) possibly via its SH2 domain.@@@@1@20@@oe@19-12-2010 1022427806@GENIA Treebank@formal@@1@S@Overexpression of wild-type Grf40 in Jurkat cells induced a significant increase of SLP-76-dependent interleukin (IL)-2 promoter and nuclear factor of activated T cell (NF-AT) activation upon T cell receptor (TCR) stimulation, whereas the COOH-terminal SH3-deleted Grf40 mutant lacked any recognizable increase in IL-2 promoter activity.@@@@1@54@@oe@19-12-2010 1022427807@GENIA Treebank@formal@@1@S@Furthermore, the SH2-deleted Grf40 mutant led to a marked inhibition of these regulatory activities, the effect of which is apparently stronger than that of the SH2-deleted Grb2 mutant.@@@@1@31@@oe@19-12-2010 1022427808@GENIA Treebank@formal@@1@S@Our data suggest that Grf40 is an adaptor molecule involved in TCR-mediated signaling through a more efficient interaction than Grb2 with SLP-76 and LAT.@@@@1@25@@oe@19-12-2010 1022447001@GENIA Treebank@formal@@1@S@Signal transduction through interferon-gamma receptor on human eosinophils.@@@@1@9@@oe@19-12-2010 1022447002@GENIA Treebank@formal@@1@S@BACKGROUND: We reported on the constitutive interferon-gamma receptor (IFN-gammaR) expression on eosinophils.@@@@1@16@@oe@19-12-2010 1022447003@GENIA Treebank@formal@@1@S@But signal transduction through IFN-gammaR on eosinophils remains to be elucidated.@@@@1@12@@oe@19-12-2010 1022447004@GENIA Treebank@formal@@1@S@In this study, we examined the involvement of the Jak/Stat pathway in the signaling of eosinophils after IFN-gammaR conjugation by the ligand binding.@@@@1@25@@oe@19-12-2010 1022447005@GENIA Treebank@formal@@1@S@METHODS: Purified peripheral eosinophils were stimulated with IFN-gamma at 37 degrees C for 1-60 min.@@@@1@17@@oe@19-12-2010 1022447006@GENIA Treebank@formal@@1@S@Tyrosine phosphorylation of IFN-gammaR, Jak1, Jak2, and Stat1alpha was examined by immunoblotting.@@@@1@16@@oe@19-12-2010 1022447007@GENIA Treebank@formal@@1@S@Gel-shift assay was also examined to show the formation of Stat1alpha-DNA complexes.@@@@1@13@@oe@19-12-2010 1022447008@GENIA Treebank@formal@@1@S@RESULTS: We show that binding of IFN-gamma to human eosinophils initiated a series of events that resulted in the rapid tyrosine phosphorylation of not only the IFN-gammaRalpha chain but also Jak1, Jak2, and Stat1alpha.@@@@1@38@@oe@19-12-2010 1022447009@GENIA Treebank@formal@@1@S@In addition, IFN-gamma enhanced the DNA-binding activity of Stat1alpha.@@@@1@11@@oe@19-12-2010 1022447010@GENIA Treebank@formal@@1@S@CONCLUSION: These data indicate that IFN-gamma affects eosinophils through its specific receptor and utilizes the Jak/Stat pathway as its mode of signaling.@@@@1@24@@oe@19-12-2010 1022597901@GENIA Treebank@formal@@1@S@Constitutive activation of an epithelial signal transducer and activator of transcription (STAT) pathway in asthma.@@@@1@18@@oe@19-12-2010 1022597902@GENIA Treebank@formal@@1@S@Cytokine effects on immunity and inflammation often depend on the transcription factors termed signal transducers and activators of transcription (STATs), so STAT signaling pathways are candidates for influencing inflammatory disease.@@@@1@34@@oe@19-12-2010 1022597903@GENIA Treebank@formal@@1@S@We reasoned that selective IFN responsiveness of the first STAT family member (Stat1) and Stat1-dependent immune-response genes such as intercellular adhesion molecule-1 (ICAM-1), IFN regulatory factor-1 (IRF-1), and Stat1 itself in airway epithelial cells provides a basis for detecting cytokine signaling abnormalities in inflammatory airway disease.@@@@1@55@@oe@19-12-2010 1022597904@GENIA Treebank@formal@@1@S@On the basis of nuclear localization and phosphorylation, we found that epithelial Stat1 (but not other control transcription factors) was invariably activated in asthmatic compared with normal control or chronic bronchitis subjects.@@@@1@36@@oe@19-12-2010 1022597905@GENIA Treebank@formal@@1@S@Furthermore, epithelial levels of activated Stat1 correlated with levels of expression for epithelial ICAM-1, IRF-1, and Stat1, and in turn, ICAM-1 levels correlated with T-cell accumulation in tissue.@@@@1@34@@oe@19-12-2010 1022597906@GENIA Treebank@formal@@1@S@However, only low levels of IFN-gamma or IFN-gamma-producing cells were detected in airway tissue in all subjects.@@@@1@19@@oe@19-12-2010 1022597907@GENIA Treebank@formal@@1@S@The results therefore provide initial evidence linking abnormal behavior of STAT pathways for cytokine signaling to the development of an inflammatory disease.@@@@1@23@@oe@19-12-2010 1022597908@GENIA Treebank@formal@@1@S@In that context, the results also change the current scheme for asthma pathogenesis to one that must include a localized gain in transcriptional signal ordinarily used for a T helper 1-type cytokine (IFN-gamma) in combination with allergy-driven overproduction of T helper 2-type cytokines.@@@@1@47@@oe@19-12-2010 1022801101@GENIA Treebank@formal@@1@S@HLA class I-mediated induction of cell proliferation involves cyclin E-mediated inactivation of Rb function and induction of E2F activity.@@@@1@20@@oe@19-12-2010 1022801102@GENIA Treebank@formal@@1@S@Chronic rejection of transplanted organs is manifested as atherosclerosis of the blood vessels of the allograft.@@@@1@17@@oe@19-12-2010 1022801103@GENIA Treebank@formal@@1@S@HLA class I Ags have been implicated to play a major role in this process, since signaling via HLA class I molecules can induce the proliferation of aortic endothelial as well as smooth muscle cells.@@@@1@37@@oe@19-12-2010 1022801104@GENIA Treebank@formal@@1@S@In this study, we show that HLA class I-mediated induction of cell proliferation correlates with inactivation of the Rb protein in the T cell line Jurkat as well as human aortic endothelial cells.@@@@1@35@@oe@19-12-2010 1022801105@GENIA Treebank@formal@@1@S@HLA class I-mediated inactivation of Rb can be inhibited specifically by neutralizing Abs to basic fibroblast growth factor (bFGF), suggesting a role for FGF receptors in the signaling process.@@@@1@33@@oe@19-12-2010 1022801106@GENIA Treebank@formal@@1@S@Signaling through HLA class I molecules induced cyclin E-associated kinase activity within 4 h in quiescent endothelial cells, and appeared to mediate the inactivation of Rb.@@@@1@28@@oe@19-12-2010 1022801107@GENIA Treebank@formal@@1@S@A cdk2 inhibitor, Olomoucine, as well as a dominant-negative cdk2 construct prevented HLA class I-mediated inactivation of Rb; in contrast, dominant-negative cdk4 and cdk6 constructs had no effect.@@@@1@33@@oe@19-12-2010 1022801108@GENIA Treebank@formal@@1@S@Furthermore, there was no increase in cyclin D-associated kinase activity upon HLA class I ligation, suggesting that cyclin E-dependent kinase activity mediates Rb inactivation, leading to E2F activation and cell proliferation.@@@@1@35@@oe@19-12-2010 1022813301@GENIA Treebank@formal@@1@S@Increased glucocorticoid receptor beta in airway cells of glucocorticoid-insensitive asthma.@@@@1@11@@oe@19-12-2010 1022813302@GENIA Treebank@formal@@1@S@Glucocorticoid (GC)-insensitive asthma is a challenging clinical problem that can be associated with life-threatening disease progression.@@@@1@20@@oe@19-12-2010 1022813303@GENIA Treebank@formal@@1@S@The molecular basis of GC insensitivity is unknown.@@@@1@9@@oe@19-12-2010 1022813304@GENIA Treebank@formal@@1@S@Alternative splicing of the GC receptor (GCR) pre-mRNA generates a second GCR, termed GCRbeta, which does not bind GC but antagonizes the transactivating activity of the classic GCR.@@@@1@33@@oe@19-12-2010 1022813305@GENIA Treebank@formal@@1@S@Thus increased expression of GCRbeta could account for glucocorticoid insensitivity.@@@@1@11@@oe@19-12-2010 1022813306@GENIA Treebank@formal@@1@S@Bronchoalveolar lavage (BAL) cells and peripheral blood mononuclear cells (PBMC) were examined for GCRbeta immunoreactivity using a GCRbeta-specific antibody by immunohistochemical staining.@@@@1@27@@oe@19-12-2010 1022813307@GENIA Treebank@formal@@1@S@Cell localization of GCRbeta expression was performed using a double immunostaining technique.@@@@1@13@@oe@19-12-2010 1022813308@GENIA Treebank@formal@@1@S@Patients with GC-insensitive asthma expressed a significantly higher number of GCRbeta-immunoreactive cells in their BAL and peripheral blood than GC-sensitive asthmatics or normal control subjects.@@@@1@26@@oe@19-12-2010 1022813309@GENIA Treebank@formal@@1@S@Furthermore, GCRbeta expression in GC-insensitive asthma was particularly high in airway T cells, which are thought to play a major role in the pathogenesis of asthma.@@@@1@29@@oe@19-12-2010 1022813310@GENIA Treebank@formal@@1@S@We also examined the expression of GCRbeta in specimens from the airways of patients with chronic bronchitis.@@@@1@18@@oe@19-12-2010 1022813311@GENIA Treebank@formal@@1@S@In chronic bronchitis, few cells were GCRbeta-positive and their numbers did not differ significantly from normal control subjects.@@@@1@20@@oe@19-12-2010 1022813312@GENIA Treebank@formal@@1@S@We conclude that GC-insensitive asthma is associated with increased expression of GCRbeta in airway T cells.@@@@1@17@@oe@19-12-2010 1022932401@GENIA Treebank@formal@@1@S@Differences in phosphorylation of the IL-2R associated JAK/STAT proteins between HTLV-I(+), IL-2-independent and IL-2-dependent cell lines and uncultured leukemic cells from patients with adult T-cell lymphoma/leukemia.@@@@1@28@@oe@19-12-2010 1022932402@GENIA Treebank@formal@@1@S@To determine activation status of the IL-2R-associated (Jak/STAT) pathway in the HTLV-I infected cells, we examined tyrosine phosphorylation of Jak3, STAT3, and STAT5 in several HTLV-I(+) T-cell lines and in uncultured leukemic T cells isolated from patients with adult T-cell lymphoma/leukemia (ATLL).@@@@1@50@@oe@19-12-2010 1022932403@GENIA Treebank@formal@@1@S@Constitutive basal phosphorylation of Jak3 and, usually, STAT3 and STAT5 was detected in all four IL-2-independent cell lines tested, but in none of the three IL-2-dependent cell lines.@@@@1@32@@oe@19-12-2010 1022932404@GENIA Treebank@formal@@1@S@Similarly, there was no detectable basal phosphorylation of Jak3 and STAT5 in the leukemic cells from ATLL patients (0/8 and 0/3, respectively).@@@@1@27@@oe@19-12-2010 1022932405@GENIA Treebank@formal@@1@S@However, stimulation with IL-2 resulted in Jak3 and STAT5 phosphorylation in both leukemic ATLL cells and IL-2-dependent lines.@@@@1@20@@oe@19-12-2010 1022932406@GENIA Treebank@formal@@1@S@Furthermore, expression of SHP-1 phosphatase which is a negative regulator of cytokine receptor signaling, was lost in most IL-2 independent cell lines (3/4) but not in the leukemic ATLL cells (0/3).@@@@1@38@@oe@19-12-2010 1022932407@GENIA Treebank@formal@@1@S@Finally, the HTLV-I(+) T-cell lines (313) but not the control, HTLV-I(-) T-cell lines were resistant to rapamycin and its novel analog RAD.@@@@1@27@@oe@19-12-2010 1022932408@GENIA Treebank@formal@@1@S@We conclude that (1) HTLV-I infection per se does not result in a constitutive phosphorylation of the Jak3, STAT3, and STAT5 proteins; (2) malignant transformation in at least some cases of ATLL does not require the constitutive, but may require IL-2-induced, activation of the IL-2R Jak/STAT pathway; and (3) there are major differences in T-cell immortalization mechanism(s) which appear to involve SHP-1 and target molecules for rapamycin and RAD.@@@@1@85@@oe@19-12-2010 1022983701@GENIA Treebank@formal@@1@S@USF/c-Myc enhances, while Yin-Yang 1 suppresses, the promoter activity of CXCR4, a coreceptor for HIV-1 entry.@@@@1@20@@oe@19-12-2010 1022983702@GENIA Treebank@formal@@1@S@Transcription factors USF1 and USF2 up-regulate gene expression (i.e., HIV-1 long terminal repeats) via interaction with an E box on their target promoters, which is also a binding site for c-Myc.@@@@1@36@@oe@19-12-2010 1022983703@GENIA Treebank@formal@@1@S@The c-Myc oncoprotein is important in control of cellular proliferation and differentiation, while Yin-Yang 1 (YY1) has been shown to control the expression of a number of cellular and viral genes.@@@@1@35@@oe@19-12-2010 1022983704@GENIA Treebank@formal@@1@S@These two proteins physically interact with each other and mutually inhibit their respective biological functions.@@@@1@16@@oe@19-12-2010 1022983705@GENIA Treebank@formal@@1@S@In this study, we show that USF/c-Myc up-regulates, while YY1 down-regulates the promoter activity of CXCR4, a coreceptor for T cell-tropic HIV-1 entry.@@@@1@27@@oe@19-12-2010 1022983706@GENIA Treebank@formal@@1@S@We have identified an E box around -260 and a YY1 binding site around -300 relative to the transcription start site.@@@@1@22@@oe@19-12-2010 1022983707@GENIA Treebank@formal@@1@S@Mutation of the E box abolished USF/c-Myc- mediated up-regulation of CXCR4 promoter activity, and mutation of the YY1 binding site was associated with unresponsiveness to YY1-mediated inhibition.@@@@1@28@@oe@19-12-2010 1022983708@GENIA Treebank@formal@@1@S@These data suggest that USF/c-Myc and YY1 may play an important role in the HIV-1-replicative cycle, by modulating both the viral fusion/entry process and viral expression.@@@@1@28@@oe@19-12-2010 1023134501@GENIA Treebank@formal@@1@S@Glucocorticoid receptors are down-regulated in inflamed colonic mucosa but not in peripheral blood mononuclear cells from patients with inflammatory bowel disease [see comments]@@@@1@25@@oe@19-12-2010 1023134502@GENIA Treebank@formal@@1@S@BACKGROUND: Growing evidence indicates that the immune system and the hypothalamic-pituitary-adrenal system are linked by several mechanisms, for example intracellular glucocorticoid receptors (hGR).@@@@1@28@@oe@19-12-2010 1023134503@GENIA Treebank@formal@@1@S@Glucocorticoids are the standard treatment of acute attacks of inflammatory bowel disease (IBD).@@@@1@16@@oe@19-12-2010 1023134504@GENIA Treebank@formal@@1@S@Binding of glucocorticoids to hGR down-regulates the transcription of inflammatory genes that can propagate IBD.@@@@1@16@@oe@19-12-2010 1023134505@GENIA Treebank@formal@@1@S@PATIENTS AND METHODS: IBD patients were either treated with 5-60 mg of prednisolone for more than 1 week or were without glucocorticoid treatment for more than 4 weeks.@@@@1@30@@oe@19-12-2010 1023134506@GENIA Treebank@formal@@1@S@hGR levels were determined from isolated cytosol of peripheral blood mononuclear cells (PBMCs) or mucosal biopsies using a radioassay with [3H]-dexamethasone.@@@@1@24@@oe@19-12-2010 1023134507@GENIA Treebank@formal@@1@S@Interleukin (IL) 6 levels were determined by enzyme-linked immunosorbent assay (ELISA).@@@@1@16@@oe@19-12-2010 1023134508@GENIA Treebank@formal@@1@S@RESULTS: The systemic (PBMC) hGR levels of corticosteroid-treated IBD patients were significantly lower than those of control subjects (59.6 +/- 57.1 dpm mg-1 cytosol protein vs. 227.0 +/- 90.8 dpm mg-1 cytosol protein, P = 0.007) and IBD patients not receiving glucocorticoid treatment (179.7 +/- 171.3 dpm mg-1 cytosol protein, P = 0.002).@@@@1@63@@oe@19-12-2010 1023134509@GENIA Treebank@formal@@1@S@Systemic hGR levels in untreated IBD patients did not differ significantly from those in control subjects.@@@@1@17@@oe@19-12-2010 1023134510@GENIA Treebank@formal@@1@S@In patients with connective tissue diseases, systemic hGR levels were also found to be decreased in the absence of glucocorticoid treatment.@@@@1@23@@oe@19-12-2010 1023134511@GENIA Treebank@formal@@1@S@Systemic hGR levels in patients with Crohn's disease (CD) treated with steroids (66.6 +/- 61.0 dpm mg-1 cytosol protein) were not different from those in patients with ulcerative colitis (UC) (56.1 +/- 51.6 dpm mg-1 cytosol protein).@@@@1@47@@oe@19-12-2010 1023134512@GENIA Treebank@formal@@1@S@In contrast to these findings, mucosal hGR levels were significantly decreased in both steroid-treated (18.0 +/- 15.5) and not steroid-treated (37.8 +/- 30.5) patients compared with control subjects ( 125.6 +/- 97.1; P = 0.00009 and P = 0.0008 respectively ).@@@@1@48@@oe@19-12-2010 1023134513@GENIA Treebank@formal@@1@S@IL-6 levels in all IBD groups with and without steroids were significantly different from those in control subjects.@@@@1@19@@oe@19-12-2010 1023134514@GENIA Treebank@formal@@1@S@CONCLUSION: In IBD there is no difference in systemic hGR levels between not steroid-treated patients and control subjects, in spite of inflammatory activity (IL-6).@@@@1@29@@oe@19-12-2010 1023134515@GENIA Treebank@formal@@1@S@Mucosal hGR levels were decreased independently of treatment, probably leading to a decreased protection against NF-kappaB action in the intestinal mucosa.@@@@1@23@@oe@19-12-2010 1023547601@GENIA Treebank@formal@@1@S@The oestrogen receptor codon 10 polymorphism detected in breast cancer is also present in non-malignant cells.@@@@1@17@@oe@19-12-2010 1023547602@GENIA Treebank@formal@@1@S@The effect of oestrogens on oestrogen-receptive organs and cells is mediated via intracellular receptors (ERalpha and ERbeta).@@@@1@20@@oe@19-12-2010 1023547603@GENIA Treebank@formal@@1@S@Oestrogen receptor gene polymorphisms in the region encoding the N-terminal portion of the protein are reportedly associated with pathological conditions including breast cancer, hypertension, spontaneous abortion and coronary heart disease.@@@@1@33@@oe@19-12-2010 1023547604@GENIA Treebank@formal@@1@S@A silent mutation in codon 10 of exon 1, detected in ER-negative and ER-positive human breast cancer cell lines, in breast tumors and blood DNA from breast cancer patients, has been recognized as a polymorphic site.@@@@1@40@@oe@19-12-2010 1023547605@GENIA Treebank@formal@@1@S@In this study we examined, by denaturing gradient-gel electrophoresis and DNA sequence analysis, the possible presence of a codon 10 polymorphic site in normal oestrogen target organs and cells such as the uterus (myometrium and endometrium), in the placenta and peripheral blood mononuclear cells and in a benign uterus tumour (leiomyoma).@@@@1@59@@oe@19-12-2010 1023547606@GENIA Treebank@formal@@1@S@We have detected ER codon 10 polymorphism in these samples and have compared them to those observed in breast cancer samples.@@@@1@22@@oe@19-12-2010 1023547607@GENIA Treebank@formal@@1@S@All tissues and cells studied were homozygous for the wild-type gene, and were heterozygous as well as homozygous for the codon-10-variant type.@@@@1@24@@oe@19-12-2010 1023547608@GENIA Treebank@formal@@1@S@These results indicate that the presence of the codon-10-variant type is not a characteristic of breast cancer.@@@@1@18@@oe@19-12-2010 1023547609@GENIA Treebank@formal@@1@S@Out current findings suggest that further investigations are warranted to elucidate the possible linkage of ER codon 10 polymorphism to physiological and pathological conditions.@@@@1@25@@oe@19-12-2010 1031881401@GENIA Treebank@formal@@1@S@Bacterial peptidoglycan induces CD14-dependent activation of transcription factors CREB/ATF and AP-1.@@@@1@12@@oe@19-12-2010 1031881402@GENIA Treebank@formal@@1@S@Peptidoglycan (PGN), the major cell wall component of Gram-positive bacteria, induces secretion of cytokines in macrophages through CD14, the pattern recognition receptor that binds lipopolysaccharide and other microbial products.@@@@1@35@@oe@19-12-2010 1031881403@GENIA Treebank@formal@@1@S@To begin to elucidate the mechanisms that regulate the transcription of cytokine genes, we wanted to determine which transcription factors are activated by PGN in mouse RAW264.7 and human THP-1 macrophage cells.@@@@1@34@@oe@19-12-2010 1031881404@GENIA Treebank@formal@@1@S@Our results demonstrated that: (i) PGN induced phosphorylation of the transcription factors ATF-1 and CREB; (ii) ATF-1 and CREB bound DNA as a dimer and induced transcriptional activation of a CRE reporter plasmid, which was inhibited by dominant negative CREB and ATF-1; (iii) PGN induced phosphorylation of c-Jun, protein synthesis of JunB and c-Fos, and transcriptional activation of the AP-1 reporter plasmid, which was inhibited by dominant negative c-Fos; and (iv) PGN-induced activation of CREB/ATF and AP-1 was mediated through CD14.@@@@1@98@@oe@19-12-2010 1031881405@GENIA Treebank@formal@@1@S@This is the first study to demonstrate activation of CREB/ATF and AP-1 transcription factors by PGN or by any other component of Gram-positive bacteria.@@@@1@25@@oe@19-12-2010 1032036701@GENIA Treebank@formal@@1@S@Nuclear factor-90 of activated T-cells: A double-stranded RNA-binding protein and substrate for the double-stranded RNA-dependent protein kinase, PKR.@@@@1@21@@oe@19-12-2010 1032036702@GENIA Treebank@formal@@1@S@NFAT transcription factors play a central role in initiating T-cell activation through the induction of immediate-early T-cell specific genes including interleukin-2 (IL-2).@@@@1@25@@oe@19-12-2010 1032036703@GENIA Treebank@formal@@1@S@NFAT transcription factors bind to a sequence in the IL-2 enhancer known as the antigen receptor response element 2 (ARRE-2).@@@@1@23@@oe@19-12-2010 1032036704@GENIA Treebank@formal@@1@S@Multiple proteins exhibiting ARRE-2 binding activity have been isolated, including a heterodimer from stimulated T-cell nuclear extracts consisting of Mr = 90 000 (NF90) and Mr = 45 000 (NF45) subunits.@@@@1@37@@oe@19-12-2010 1032036705@GENIA Treebank@formal@@1@S@The subunits of this heterodimer have been cloned, and NF90 was found to encode a protein containing two domains that are predicted to form motifs capable of binding to double-stranded RNA.@@@@1@33@@oe@19-12-2010 1032036706@GENIA Treebank@formal@@1@S@Using in vitro translated polypeptides, we have demonstrated that NF90 specifically binds to double-stranded RNA.@@@@1@17@@oe@19-12-2010 1032036707@GENIA Treebank@formal@@1@S@Furthermore, NF90 was phosphorylated in a double-stranded RNA-dependent manner likely by the interferon-induced, double-stranded RNA-dependent protein kinase, PKR.@@@@1@22@@oe@19-12-2010 1032036708@GENIA Treebank@formal@@1@S@The NF90 protein was found to be expressed not only in T-cells, but also in nonimmune HeLa cells.@@@@1@20@@oe@19-12-2010 1032036709@GENIA Treebank@formal@@1@S@In HeLa cells, the protein was almost exclusively localized to the ribosome salt wash fraction of cell lysates.@@@@1@20@@oe@19-12-2010 1032216001@GENIA Treebank@formal@@1@S@Control of lymphocyte development by the Ikaros gene family.@@@@1@10@@oe@19-12-2010 1032216002@GENIA Treebank@formal@@1@S@Lymphoid cell differentiation relies on precisely orchestrated gene activation and repression events.@@@@1@13@@oe@19-12-2010 1032216003@GENIA Treebank@formal@@1@S@Gene targeting studies have demonstrated crucial roles for the transcription factors Ikaros and Aiolos in regulating multiple stages of B and T cell development.@@@@1@25@@oe@19-12-2010 1032216004@GENIA Treebank@formal@@1@S@Recent experiments suggest that Ikaros and Aiolos set B cell antigen-receptor (BCR)- and TCR-mediated signaling thresholds and that the molecules exist within T cells in nuclear complexes that contain nucleosome remodeling and histone deacetylase activities.@@@@1@39@@oe@19-12-2010 1032706401@GENIA Treebank@formal@@1@S@c-Myc and E1A induced cellular sensitivity to activated NK cells involves cytotoxic granules as death effectors.@@@@1@17@@oe@19-12-2010 1032706402@GENIA Treebank@formal@@1@S@The contact of natural killer (NK) cells with foreign cells and with certain virus-infected or tumor cells triggers the cytolytic machinery of NK cells.@@@@1@27@@oe@19-12-2010 1032706403@GENIA Treebank@formal@@1@S@This triggering leads to exocytosis of the cytotoxic NK cell granules.@@@@1@12@@oe@19-12-2010 1032706404@GENIA Treebank@formal@@1@S@The oncoproteins c-Myc and E1A render cells vulnerable to NK cell mediated cytolysis yet the mechanisms of sensitization are not well understood.@@@@1@23@@oe@19-12-2010 1032706405@GENIA Treebank@formal@@1@S@In a model where foreign cells (rat fibroblasts) were cocultured with human IL-2 activated NK cells, we observed that NK cells were capable of efficiently killing their targets only if the cells overexpressed the oncogene c-Myc or E1A.@@@@1@42@@oe@19-12-2010 1032706406@GENIA Treebank@formal@@1@S@Both the parental and the oncogene expressing fibroblasts similarly triggered phosphoinositide hydrolysis in the bound NK cells, demonstrating that NK cells were cytolytically activated in contact with both resistant parental and oncogene expressing sensitive target fibroblasts.@@@@1@38@@oe@19-12-2010 1032706407@GENIA Treebank@formal@@1@S@The cell death was independent of wild-type p53 and was not inhibited by an anti-apoptotic protein EIB19K.@@@@1@18@@oe@19-12-2010 1032706408@GENIA Treebank@formal@@1@S@These results provided evidence that c-Myc and E1A activated the NK cell induced cytolysis at a post-triggering stage of NK cell-target cell interaction.@@@@1@24@@oe@19-12-2010 1032706409@GENIA Treebank@formal@@1@S@In consistence, the c-Myc and E1A overexpressing fibroblasts were more sensitive to the cytolytic effects of isolated NK cell-derived granules than parental cells.@@@@1@25@@oe@19-12-2010 1032706410@GENIA Treebank@formal@@1@S@The data indicate that oncogenes activate the cytotoxicity of NK cell granules.@@@@1@13@@oe@19-12-2010 1032706411@GENIA Treebank@formal@@1@S@This mechanism can have a role in directing the cytolytic action of NK cells towards the virus-infected and cancer cells.@@@@1@21@@oe@19-12-2010 1032810701@GENIA Treebank@formal@@1@S@Apoptosis and growth inhibition in malignant lymphocytes after treatment with arsenic trioxide at clinically achievable concentrations [see comments]@@@@1@20@@oe@19-12-2010 1032810702@GENIA Treebank@formal@@1@S@BACKGROUND: Arsenic trioxide (As2O3) can induce clinical remission in patients with acute promyelocytic leukemia via induction of differentiation and programmed cell death (apoptosis).@@@@1@29@@oe@19-12-2010 1032810703@GENIA Treebank@formal@@1@S@We investigated the effects of As2O3 on a panel of malignant lymphocytes to determine whether growth-inhibitory and apoptotic effects of As2O3 can be observed in these cells at clinically achievable concentrations.@@@@1@32@@oe@19-12-2010 1032810704@GENIA Treebank@formal@@1@S@METHODS: Eight malignant lymphocytic cell lines and primary cultures of lymphocytic leukemia and lymphoma cells were treated with As2O3, with or without dithiothreitol (DTT) or buthionine sulfoximine (BSO) (an inhibitor of glutathione synthesis).@@@@1@42@@oe@19-12-2010 1032810705@GENIA Treebank@formal@@1@S@Apoptosis was assessed by cell morphology, flow cytometry, annexin V protein level, and terminal deoxynucleotidyl transferase labeling of DNA fragments.@@@@1@24@@oe@19-12-2010 1032810706@GENIA Treebank@formal@@1@S@Cellular proliferation was determined by 5-bromo-2'-deoxyuridine incorporation into DNA and flow cytometry and by use of a mitotic arrest assay.@@@@1@21@@oe@19-12-2010 1032810707@GENIA Treebank@formal@@1@S@Mitochondrial transmembrane potential (delta psi(m)) was measured by means of rhodamine 123 staining and flow cytometry.@@@@1@19@@oe@19-12-2010 1032810708@GENIA Treebank@formal@@1@S@Protein expression was assessed by western blot analysis or immunofluorescence.@@@@1@11@@oe@19-12-2010 1032810709@GENIA Treebank@formal@@1@S@RESULTS: Therapeutic concentrations of As2O3 (1-2 microM) had dual effects on malignant lymphocytes: 1) inhibition of growth through adenosine triphosphate (ATP) depletion and prolongation of cell cycle time and 2) induction of apoptosis.@@@@1@42@@oe@19-12-2010 1032810710@GENIA Treebank@formal@@1@S@As2O3-induced apoptosis was preceded by delta psi(m) collapse.@@@@1@9@@oe@19-12-2010 1032810711@GENIA Treebank@formal@@1@S@DTT antagonized and BSO enhanced As2O3-induced ATP depletion, delta psi(m) collapse, and apoptosis.@@@@1@16@@oe@19-12-2010 1032810712@GENIA Treebank@formal@@1@S@Caspase-3 activation, usually resulting from delta psi(m) collapse, was not always associated with As2O3-induced apoptosis.@@@@1@18@@oe@19-12-2010 1032810713@GENIA Treebank@formal@@1@S@As2O3 induced PML (promyelocytic leukemia) protein degradation but did not modulate expression of cell cycle-related proteins, including c-myc, retinoblastoma protein, cyclin-dependent kinase 4, cyclin D1, and p53, or expression of differentiation-related antigens.@@@@1@41@@oe@19-12-2010 1032810714@GENIA Treebank@formal@@1@S@CONCLUSIONS: Substantial growth inhibition and apoptosis without evidence of differentiation were induced in most malignant lymphocytic cells treated with 1-2 microM As2O3.@@@@1@24@@oe@19-12-2010 1032810715@GENIA Treebank@formal@@1@S@As2O3 may prove useful in the treatment of malignant lymphoproliferative disorders.@@@@1@12@@oe@19-12-2010 1032914701@GENIA Treebank@formal@@1@S@Recognition of NFATp/AP-1 composite elements within genes induced upon the activation of immune cells.@@@@1@15@@oe@19-12-2010 1032914702@GENIA Treebank@formal@@1@S@Composite elements are regulatory modules of promoters or enhancers that consist of binding sites of two different but synergizing transcription factors.@@@@1@22@@oe@19-12-2010 1032914703@GENIA Treebank@formal@@1@S@A well-studied example is nuclear factors of activated T-cell (NFAT) sites which are composite elements of a NFATp/c and an activating protein 1 (AP-1) binding site.@@@@1@31@@oe@19-12-2010 1032914704@GENIA Treebank@formal@@1@S@We have developed a computational approach to identify potential NFAT target genes which (a) comprises an improved method to scan for individual NFAT composite elements; (b) considers positional effects relative to transcription start sites; and (c) involves cluster analysis of potential NFAT composite elements.@@@@1@53@@oe@19-12-2010 1032914705@GENIA Treebank@formal@@1@S@All three steps progressively helpX?ed to discriminate T-cell-specific promoter sequences against other functional regions (coding and intronic sequences) of the same genes, against promoters of muscle-specific genes or against random sequences.@@@@1@35@@oe@19-12-2010 1032914706@GENIA Treebank@formal@@1@S@Using this approach, we identified potential NFAT composite elements in promoters of cytokine genes and their receptors as well as in promoters of genes for AP-1 family members, Ca2+-binding proteins and some other components of the regulatory network operating in activated T-cells and other immune cells.@@@@1@49@@oe@19-12-2010 1032914707@GENIA Treebank@formal@@1@S@The method developed can be adapted to characterize and identify other composite elements as well.@@@@1@16@@oe@19-12-2010 1032914708@GENIA Treebank@formal@@1@S@The program for recognition NFAT composite elements is available through the World Wide Web (http://compel.bionet.nsc.ru/FunSite/CompelScan.html and http://transfac.gbf.de/dbsearch/funsitep/s_comp.html).@@@@1@20@@oe@19-12-2010 1032914709@GENIA Treebank@formal@@1@S@Copyright 1999 Academic Press.@@@@1@5@@oe@19-12-2010 1033039601@GENIA Treebank@formal@@1@S@A role for RanBP1 in the release of CRM1 from the nuclear pore complex in a terminal step of nuclear export.@@@@1@22@@oe@19-12-2010 1033039602@GENIA Treebank@formal@@1@S@We recently developed an assay in which nuclear export of the shuttling transcription factor NFAT (nuclear factor of activated T cells) can be reconstituted in permeabilized cells with the GTPase Ran and the nuclear export receptor CRM1.@@@@1@40@@oe@19-12-2010 1033039603@GENIA Treebank@formal@@1@S@We have now used this assay to identify another export factor.@@@@1@12@@oe@19-12-2010 1033039604@GENIA Treebank@formal@@1@S@After preincubation of permeabilized cells with a Ran mutant that cannot hydrolyze GTP (RanQ69L), cytosol supports NFAT export, but CRM1 and Ran alone do not.@@@@1@31@@oe@19-12-2010 1033039605@GENIA Treebank@formal@@1@S@The RanQ69L preincubation leads to accumulation of CRM1 at the cytoplasmic periphery of the nuclear pore complex (NPC) in association with the p62 complex and Can/Nup214.@@@@1@29@@oe@19-12-2010 1033039606@GENIA Treebank@formal@@1@S@RanGTP-dependent association of CRM1 with these nucleoporins was reconstituted in vitro.@@@@1@12@@oe@19-12-2010 1033039607@GENIA Treebank@formal@@1@S@By biochemical fractionation and reconstitution, we showed that RanBP1 restores nuclear export after the RanQ69L preincubation.@@@@1@18@@oe@19-12-2010 1033039608@GENIA Treebank@formal@@1@S@It also stimulates nuclear export in cells that have not been preincubated with RanQ69L.@@@@1@15@@oe@19-12-2010 1033039609@GENIA Treebank@formal@@1@S@RanBP1 as well as Ran-binding domains of the cytoplasmic nucleoporin RanBP2 promote the release of CRM1 from the NPC.@@@@1@20@@oe@19-12-2010 1033039610@GENIA Treebank@formal@@1@S@Taken together, our results indicate that RanGTP is important for the targeting of export complexes to the cytoplasmic side of the NPC and that RanBP1 and probably RanBP2 are involved in the dissociation of nuclear export complexes from the NPC in a terminal step of transport.@@@@1@48@@oe@19-12-2010 1033156401@GENIA Treebank@formal@@1@S@Expression of Th1 and Th2 type cytokines responding to HBsAg and HBxAg in chronic hepatitis B patients.@@@@1@18@@oe@19-12-2010 1033156402@GENIA Treebank@formal@@1@S@The cytokine pattern on viral antigen recognition is believed to exert a profound influence on the resolution of viral infections and viral clearance.@@@@1@24@@oe@19-12-2010 1033156403@GENIA Treebank@formal@@1@S@This study was initiated to investigate whether a cytokine imbalance oriented toward Th2 type response plays a role in chronic hepatitis B.@@@@1@23@@oe@19-12-2010 1033156404@GENIA Treebank@formal@@1@S@Cytokine profiles of peripheral blood mononuclear cells associated with chronic hepatitis B were analysed by RT-PCR.@@@@1@17@@oe@19-12-2010 1033156405@GENIA Treebank@formal@@1@S@Upon HBsAg stimulation, expression of IFN-gamma, IL-2, IL-4, and IL-10 was detected in 41%, 8%, 41%, and 50% of the patients, respectively.@@@@1@35@@oe@19-12-2010 1033156406@GENIA Treebank@formal@@1@S@Among these cytokines, the expression of IFN-gamma was associated with high levels of serum AST/ALT.@@@@1@17@@oe@19-12-2010 1033156407@GENIA Treebank@formal@@1@S@However, we could not prove that Th2 type cytokines had a protective effect on hepatocytes.@@@@1@17@@oe@19-12-2010 1033156408@GENIA Treebank@formal@@1@S@Upon HBxAg stimulation, there was no recognizable association of cytokine patterns with AST/ALT levels.@@@@1@16@@oe@19-12-2010 1033156409@GENIA Treebank@formal@@1@S@In conclusion, production of a Th1 cytokine, IFN-gamma, by HBsAg-reactive cells was associated with hepatocyte damage in chronic hepatitis B, while no counteracting effect of Th2 cytokines produced by those cells was observed.@@@@1@38@@oe@19-12-2010 1033948201@GENIA Treebank@formal@@1@S@Protein kinase B (c-Akt), phosphatidylinositol 3-kinase, and STAT5 are activated by erythropoietin (EPO) in HCD57 erythroid cells but are constitutively active in an EPO-independent, apoptosis-resistant subclone (HCD57-SREI cells).@@@@1@38@@oe@19-12-2010 1033948202@GENIA Treebank@formal@@1@S@We found that erythropoietin (EPO) and stem cell factor (SCF) activated protein kinase B (PKB/Akt) in EPO-dependent HCD57 erythroid cells.@@@@1@27@@oe@19-12-2010 1033948203@GENIA Treebank@formal@@1@S@To better understand signals controlling proliferation and viability, erythroid cells that resist apoptosis in the absence of EPO were subcloned and characterized (HCD57-SREI cells).@@@@1@28@@oe@19-12-2010 1033948204@GENIA Treebank@formal@@1@S@Constitutive activations of PKB/Akt, STAT5a, and STAT5b were noted in these EPO-independent cells.@@@@1@16@@oe@19-12-2010 1033948205@GENIA Treebank@formal@@1@S@PI3-kinase activity was an upstream activator of PKB/Akt because the PI3-kinase inhibitor LY294002 blocked both constitutive PKB/Akt and factor-dependent PKB/Akt activity.@@@@1@22@@oe@19-12-2010 1033948206@GENIA Treebank@formal@@1@S@The LY294002 study showed that proliferation and viability of both HCD57-SREI and HCD57 cells correlated with the activity of PKB/Akt; however, PKB/Akt activity alone did not protect these cells from apoptosis.@@@@1@34@@oe@19-12-2010 1033948207@GENIA Treebank@formal@@1@S@Treatment of HCD57 cells with SCF also activated PKB/Akt, but did not protect from apoptosis.@@@@1@17@@oe@19-12-2010 1033948208@GENIA Treebank@formal@@1@S@This result suggested that PKB/PI3-kinase activity is necessary but not sufficient to promote viability and/or proliferation.@@@@1@17@@oe@19-12-2010 1033948209@GENIA Treebank@formal@@1@S@Constitutive STAT5 activity, activated through an unknown pathway not including JAK2 or EPOR, may act in concert with the constitutive PI3-kinase/PKB/Akt pathway to protect the EPO-independent HCD57-SREI cells from apoptosis and promote limited proliferation.@@@@1@37@@oe@19-12-2010 1034834001@GENIA Treebank@formal@@1@S@Human T-cell leukemia virus type 1 Tax protein induces the expression of STAT1 and STAT5 genes in T-cells.@@@@1@19@@oe@19-12-2010 1034834002@GENIA Treebank@formal@@1@S@Human T-cell leukemia virus type 1 (HTLV-1) Tax transforms normal T-cells in the presence of interleukin (IL)-2 in vitro.@@@@1@25@@oe@19-12-2010 1034834003@GENIA Treebank@formal@@1@S@STAT is a family of transcription factors that play a pivotal role in cytokine-induced functions of a various type of cells.@@@@1@22@@oe@19-12-2010 1034834004@GENIA Treebank@formal@@1@S@We investigated the involvement of STATs in the transformation of T-cells by HTLV-1.@@@@1@14@@oe@19-12-2010 1034834005@GENIA Treebank@formal@@1@S@HTLV-1-transformed T-cell lines expressed higher amounts of STAT1, STAT3 and STAT5 RNA and proteins than virus-negative T cells.@@@@1@20@@oe@19-12-2010 1034834006@GENIA Treebank@formal@@1@S@The expression of STAT1 and STAT5 in a human T-cell line was induced by Tax.@@@@1@16@@oe@19-12-2010 1034834007@GENIA Treebank@formal@@1@S@IL-2 induced the DNA binding activity of STAT3 and STAT5 of a HTLV-1-transformed cell line and then stimulated its proliferation.@@@@1@21@@oe@19-12-2010 1034834008@GENIA Treebank@formal@@1@S@In contrast, IL-2 did neither in a cell line lacking STAT3 and STAT5.@@@@1@15@@oe@19-12-2010 1034834009@GENIA Treebank@formal@@1@S@The expression of STAT1, STAT3 and STAT5 mRNAs were also induced by a T-cell mitogen in normal human peripheral blood mononuclear cells.@@@@1@24@@oe@19-12-2010 1034834010@GENIA Treebank@formal@@1@S@Our results suggest that the induction of STAT1 and STAT5 by Tax enhances cytokine-induced functions of virus-infected T-cells, hence the induction may play a role in IL-2-dependent transformation steps of T-cells by HTLV-1.@@@@1@35@@oe@19-12-2010 1035224701@GENIA Treebank@formal@@1@S@Selection and long-term persistence of reactive CTL clones during an EBV chronic response are determined by avidity, CD8 variable contribution compensating for differences in TCR affinities.@@@@1@28@@oe@19-12-2010 1035224702@GENIA Treebank@formal@@1@S@Recent studies have suggested that the diversity of TCR repertoire after primary immunization is conserved in memory T cells and that a progressive narrowing of this repertoire may take place during recall infections.@@@@1@34@@oe@19-12-2010 1035224703@GENIA Treebank@formal@@1@S@It now remains to be investigated which parameters determine the repertoire of the memory response and possibly restrict its diversity after subsequent antigenic challenges.@@@@1@25@@oe@19-12-2010 1035224704@GENIA Treebank@formal@@1@S@To address this question, we took advantage of a panel of CD8+ T cell clones from the joint of a rheumatoid arthritis patient and selected for their reactivity against a single MHC/peptide complex.@@@@1@35@@oe@19-12-2010 1035224705@GENIA Treebank@formal@@1@S@Characterization of both TCR chains documented a great diversity among those clones and the persistence of clonotypes over a 2-yr period.@@@@1@22@@oe@19-12-2010 1035224706@GENIA Treebank@formal@@1@S@Strikingly, despite the observed repertoire heterogeneity, all clones displayed a narrow range of MHC/peptide density requirements in cytotoxicity assays (ED50 between 9 and 36 nM).@@@@1@30@@oe@19-12-2010 1035224707@GENIA Treebank@formal@@1@S@TCR affinities were then indirectly estimated by blocking CD8 interaction with an anti-CD8 mAb.@@@@1@15@@oe@19-12-2010 1035224708@GENIA Treebank@formal@@1@S@We found a wide range of TCR affinities among the different clonotypes that segregated with Vbeta usage.@@@@1@18@@oe@19-12-2010 1035224709@GENIA Treebank@formal@@1@S@We thus propose that during an in vivo chronic response, a narrow range of avidity of the TCR-CD8 complex conditions long-term clonotype persistence, and that the level of CD8 contribution is adjusted to keep clonotypes with variable TCR affinities within this avidity window.@@@@1@46@@oe@19-12-2010 1035227301@GENIA Treebank@formal@@1@S@Modulation of CD28 expression: distinct regulatory pathways during activation and replicative senescence.@@@@1@14@@oe@19-12-2010 1035227302@GENIA Treebank@formal@@1@S@The costimulatory molecule CD28 has a restricted tissue distribution and is expressed on T cells and some plasmacytoma cells.@@@@1@20@@oe@19-12-2010 1035227303@GENIA Treebank@formal@@1@S@Although CD28 is constitutively expressed, its expression is transiently down-regulated following T cell activation and declines progressively with in vitro senescence.@@@@1@23@@oe@19-12-2010 1035227304@GENIA Treebank@formal@@1@S@In vivo, CD8+ T cells and, less frequently, CD4+ T cells may completely lose CD28 surface expression during chronic infections and with aging.@@@@1@27@@oe@19-12-2010 1035227305@GENIA Treebank@formal@@1@S@This correlates with changes of nuclear protein-binding activities to two motifs, site alpha and beta, within the CD28 minimal promoter.@@@@1@23@@oe@19-12-2010 1035227306@GENIA Treebank@formal@@1@S@Both alpha- and beta-bound complexes are found only in lymphoid tissues, in CD28+ T cells, and in some transformed B cells.@@@@1@24@@oe@19-12-2010 1035227307@GENIA Treebank@formal@@1@S@These complexes are coordinately expressed except during replicative senescence, which is characterized by the down-modulation of site beta- but not site alpha-binding activities.@@@@1@25@@oe@19-12-2010 1035227308@GENIA Treebank@formal@@1@S@In contrast, T cell activation induces a parallel decline in both site alpha- and beta-binding activities.@@@@1@18@@oe@19-12-2010 1035227309@GENIA Treebank@formal@@1@S@CD4+ and CD8+ T cells differ in their beta-binding profiles, which may explain the more pronounced down-regulation of CD28 in senescent CD8+ T cells.@@@@1@26@@oe@19-12-2010 1035227310@GENIA Treebank@formal@@1@S@In vivo expanded CD4+CD28null and CD8+CD28null T cells uniformly lack alpha- and beta- bound complexes, resembling the pattern seen in chronically activated cells and not of senescent cells.@@@@1@29@@oe@19-12-2010 1035662901@GENIA Treebank@formal@@1@S@Glucocorticoid receptors in anorexia nervosa and Cushing's disease.@@@@1@10@@oe@19-12-2010 1035662902@GENIA Treebank@formal@@1@S@BACKGROUND: Patients with anorexia nervosa do not display cushingoid features in spite of elevated cortisol plasma levels.@@@@1@19@@oe@19-12-2010 1035662903@GENIA Treebank@formal@@1@S@Whether a cortisol resistance or a reduced availability of the metabolic substrates necessary to develop the effect of glucocorticoids is responsible for this has not been established.@@@@1@28@@oe@19-12-2010 1035662904@GENIA Treebank@formal@@1@S@METHODS: Twenty-two patients with severe restrictive anorexia nervosa, 10 patients with active Cushing's disease, and 24 healthy volunteers without psychiatric disorders or mood alterations were investigated.@@@@1@31@@oe@19-12-2010 1035662905@GENIA Treebank@formal@@1@S@Glucocorticoid receptor characteristics were examined on mononuclear leukocytes by measuring [3H]dexamethasone binding and the effect of dexamethasone on [3H]thymidine incorporation, which represents an index of DNA synthesis.@@@@1@29@@oe@19-12-2010 1035662906@GENIA Treebank@formal@@1@S@RESULTS: The number of glucocorticoid receptors on mononuclear leukocytes (MNL) was comparable in patients with anorexia nervosa, patients with active Cushing's disease, and normal subjects (binding capacity 3.3 +/- 0.23 vs. 3.7 +/- 0.30 and 3.5 +/- 0.20 fmol/10(6) cells).@@@@1@49@@oe@19-12-2010 1035662907@GENIA Treebank@formal@@1@S@Conversely, glucocorticoid receptor affinity was significantly decreased in anorexia nervosa as well as in Cushing's patients compared to control subjects (dissociation constant 4.0 +/- 0.31 and 4.1 +/- 0.34 vs. 2.9 +/- 0.29 nmol/L, p < .001) and inversely correlated with the levels of urinary free cortisol in both groups of patients.@@@@1@58@@oe@19-12-2010 1035662908@GENIA Treebank@formal@@1@S@Basal [3H]thymidine incorporation in MNL was significantly reduced in anorexia nervosa as well as in Cushing's patients compared to control subjects (p < .001) and was diminished by dexamethasone to an extent similar to control subjects in patients with anorexia nervosa, but significantly (p < .001) less in those with Cushing's disease.@@@@1@60@@oe@19-12-2010 1035662909@GENIA Treebank@formal@@1@S@In patients with anorexia nervosa, the incorporation of [3H]thymidine into the MNL was inversely correlated with urinary free cortisol levels.@@@@1@22@@oe@19-12-2010 1035662910@GENIA Treebank@formal@@1@S@CONCLUSIONS: These data indicate that the lack of cushingoid features in patients with anorexia nervosa is not ascribable to a reduced sensitivity to glucocorticoids but is more likely due to the paucity of metabolic substrates.@@@@1@37@@oe@19-12-2010 1035781801@GENIA Treebank@formal@@1@S@Latent membrane protein 1 of Epstein-Barr virus interacts with JAK3 and activates STAT proteins.@@@@1@15@@oe@19-12-2010 1035781802@GENIA Treebank@formal@@1@S@Latent membrane protein 1 (LMP1) acts like a permanently activated receptor of the tumor necrosis factor (TNF)-receptor superfamily and is absolutely required for B cell immortalization by Epstein-Barr virus.@@@@1@35@@oe@19-12-2010 1035781803@GENIA Treebank@formal@@1@S@Molecular and biochemical approaches demonstrated that LMP1 usurps cellular signaling pathways resulting in the induction of NF-kappaB and AP-1 via two C-terminal activating regions.@@@@1@25@@oe@19-12-2010 1035781804@GENIA Treebank@formal@@1@S@We demonstrate here that a third region encompassing a proline rich sequence within the 33 bp repetitive stretch of LMP1's C-terminus is required for the activation of Janus kinase 3 (JAK3).@@@@1@35@@oe@19-12-2010 1035781805@GENIA Treebank@formal@@1@S@The interaction of LMP1 and JAK3 leads to the enhanced tyrosine auto/transphosphorylation of JAK3 within minutes after crosslinking of a conditional NGF-R:LMP1 chimera and is a prerequisite for the activation of STAT transcription factors.@@@@1@35@@oe@19-12-2010 1035781806@GENIA Treebank@formal@@1@S@These results reveal a novel activating region in the LMP1 C-terminus and identify the JAK/STAT pathway as a target of this viral integral membrane protein in B cells.@@@@1@29@@oe@19-12-2010 1035802801@GENIA Treebank@formal@@1@S@20-Epi analogues of 1,25-dihydroxyvitamin D3 are highly potent inducers of DRIP coactivator complex binding to the vitamin D3 receptor.@@@@1@20@@oe@19-12-2010 1035802802@GENIA Treebank@formal@@1@S@1,25-Dihydroxyvitamin D3 (1,25(OH)2D3) plays a major role in the stimulation of bone growth, mineralization, and intestinal calcium and phosphate absorption; it also acts as a general inhibitor of cellular proliferation.@@@@1@36@@oe@19-12-2010 1035802803@GENIA Treebank@formal@@1@S@Several new, clinically relevant compounds dissociate antiproliferative and calcemic activities of 1,25(OH)2D3, but the molecular basis for this has not been clearly elucidated.@@@@1@26@@oe@19-12-2010 1035802804@GENIA Treebank@formal@@1@S@Here, we tested whether the potency of one class of compounds, 20-epi analogues, to induce myeloid cell differentiation, is because of direct molecular effects on vitamin D receptor (VDR).@@@@1@36@@oe@19-12-2010 1035802805@GENIA Treebank@formal@@1@S@We report that two 20-epi analogues, MC1627 and MC1288, induced differentiation and transcription of p21(Waf1,Cip1), a key VDR target gene involved in growth inhibition, at a concentration 100-fold lower than that of 1,25(OH)2D3.@@@@1@43@@oe@19-12-2010 1035802806@GENIA Treebank@formal@@1@S@We compared this sensitivity to analogue effects on VDR interacting proteins: RXR, GRIP-1, and DRIP205, a subunit of the DRIP coactivator complex.@@@@1@27@@oe@19-12-2010 1035802807@GENIA Treebank@formal@@1@S@Compared with the interaction of VDR with RXR or GRIP-1, the differentiation dose-response most closely correlated to the ligand-dependent recruitment of the DRIP coactivator complex to VDR and to the ability of the receptor to activate transcription in a cell-free system.@@@@1@43@@oe@19-12-2010 1035802808@GENIA Treebank@formal@@1@S@These results provide compelling links between the efficiency of the 20-epi analogue in inducing VDR/DRIP interactions, transactivation in vitro, and its enhanced ability to induce cellular differentiation.@@@@1@30@@oe@19-12-2010 1035817801@GENIA Treebank@formal@@1@S@Multiple NF-ATc isoforms with individual transcriptional properties are synthesized in T lymphocytes.@@@@1@13@@oe@19-12-2010 1035817802@GENIA Treebank@formal@@1@S@The transcription factor NF-ATc that controls gene expression in T lymphocytes and embryonic cardiac cells is expressed in three prominent isoforms.@@@@1@22@@oe@19-12-2010 1035817803@GENIA Treebank@formal@@1@S@This is due to alternative splice/polyadenylation events that lead to the predominant synthesis of two long isoforms in naive T cells and a shorter NF-ATc isoform in effector T cells.@@@@1@31@@oe@19-12-2010 1035817804@GENIA Treebank@formal@@1@S@Whereas the previously described isoform NF-ATc/A contains a relatively short C terminus, the longer isoforms, B and C, span extra C-terminal peptides of 128 and 246 aa, respectively.@@@@1@33@@oe@19-12-2010 1035817805@GENIA Treebank@formal@@1@S@We show here that in addition to the strong N-terminal trans-activation domain, TAD-A, which is common to all three NF-ATc isoforms, NF-ATc/C contains a second trans-activation domain, TAD-B, in its C-terminal peptide.@@@@1@38@@oe@19-12-2010 1035817806@GENIA Treebank@formal@@1@S@Various stimuli of T cells that induce the activity of TAD-A also enhance the activity of TAD-B, but, unlike TAD-A, TAD-B remains unphosphorylated by protein from 12-O-tetradecanoyl 12-phorbol 13-acetate-stimulated T cells.@@@@1@35@@oe@19-12-2010 1035817807@GENIA Treebank@formal@@1@S@The shorter C-terminal peptide of isoform NF-ATc/B exerts a suppressive transcriptional effect.@@@@1@13@@oe@19-12-2010 1035817808@GENIA Treebank@formal@@1@S@These properties of NF-ATc/B and- C might be of importance for gene regulation in naive T lymphocytes in which NF-ATc/B and -C are predominantly synthesized.@@@@1@26@@oe@19-12-2010 1035876401@GENIA Treebank@formal@@1@S@Development and maturation of secondary lymphoid tissues.@@@@1@8@@oe@19-12-2010 1035876402@GENIA Treebank@formal@@1@S@The secondary lymphoid tissues are located at strategic sites where foreign antigens can be efficiently brought together with immune system regulatory and effector cells.@@@@1@25@@oe@19-12-2010 1035876403@GENIA Treebank@formal@@1@S@The organized structure of the secondary lymphoid tissues is thought to enhance the sensitivity of antigen recognition and to support proper regulation of the activation and maturation of the antigen-responsive lymphoid cells.@@@@1@33@@oe@19-12-2010 1035876404@GENIA Treebank@formal@@1@S@Although a substantial amount is known about the cellular elements that compose the lymphoid and nonlymphoid components of the secondary lymphoid tissues, information concerning the signals that control the development of the tissues and that maintain the organized tissue microenvironment remain undefined.@@@@1@44@@oe@19-12-2010 1035876405@GENIA Treebank@formal@@1@S@Studies over the past few years have identified lymphotoxin as a critical signaling molecule not only for the organogenesis of secondary lymphoid tissues but for the maintenance of aspects of their microarchitecture as well.@@@@1@35@@oe@19-12-2010 1035876406@GENIA Treebank@formal@@1@S@Additional signaling molecules that contribute to the formation of normal lymphoid tissue structure are being identified at an accelerating pace.@@@@1@21@@oe@19-12-2010 1035876407@GENIA Treebank@formal@@1@S@Analyses of mouse strains with congenital defects in different aspects of secondary lymphoid tissue development are beginning to clarify the role of these tissues in immune responses and host defense.@@@@1@31@@oe@19-12-2010 1035876408@GENIA Treebank@formal@@1@S@This review focuses on studies defining recently identified crucial signals for the biogenesis of secondary lymphoid organs and for the maintenance of their proper microarchitecture.@@@@1@26@@oe@19-12-2010 1035876409@GENIA Treebank@formal@@1@S@It also discusses new insights into how the structure of these tissues supports effective immune responses.@@@@1@17@@oe@19-12-2010 1035877501@GENIA Treebank@formal@@1@S@Selection of the T cell repertoire.@@@@1@7@@oe@19-12-2010 1035877502@GENIA Treebank@formal@@1@S@Advances in gene technology have allowed the manipulation of molecular interactions that shape the T cell repertoire.@@@@1@18@@oe@19-12-2010 1035877503@GENIA Treebank@formal@@1@S@Although recognized as fundamental aspects of T lymphocyte development, only recently have the mechanisms governing positive and negative selection been examined at a molecular level.@@@@1@27@@oe@19-12-2010 1035877504@GENIA Treebank@formal@@1@S@Positive selection refers to the active process of rescuing MHC-restricted thymocytes from programmed cell death.@@@@1@16@@oe@19-12-2010 1035877505@GENIA Treebank@formal@@1@S@Negative selection refers to the deletion or inactivation of potentially autoreactive thymocytes.@@@@1@13@@oe@19-12-2010 1035877506@GENIA Treebank@formal@@1@S@This review focuses on interactions during thymocyte maturation that define the T cell repertoire, with an emphasis placed on current literature within this field.@@@@1@26@@oe@19-12-2010 1035901201@GENIA Treebank@formal@@1@S@Phorbol ester-induced mononuclear cell differentiation is blocked by the mitogen-activated protein kinase kinase (MEK) inhibitor PD98059.@@@@1@19@@oe@19-12-2010 1035901202@GENIA Treebank@formal@@1@S@The purpose of this study was to evaluate whether the mitogen-activated protein kinase (MAPK) signaling pathway contributes to 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced mononuclear differentiation in the human myeloblastic leukemia ML-1 cells.@@@@1@35@@oe@19-12-2010 1035901203@GENIA Treebank@formal@@1@S@Upon TPA treatment, the activity of ERK1 and ERK2 rapidly increased, with maximal induction between 1 and 3 h, while ERK2 protein levels remained constant.@@@@1@29@@oe@19-12-2010 1035901204@GENIA Treebank@formal@@1@S@The activity of JNK1 was also significantly induced, with JNK1 protein levels increasing moderately during exposure to TPA.@@@@1@20@@oe@19-12-2010 1035901205@GENIA Treebank@formal@@1@S@Treatment of cells with PD98059, a specific inhibitor of mitogen-activated protein kinase kinase (MEK), inhibited TPA-induced ERK2 activity.@@@@1@23@@oe@19-12-2010 1035901206@GENIA Treebank@formal@@1@S@Furthermore, PD98059 completely blocked the TPA-induced differentiation of ML-1 cells, as assessed by a number of features associated with mononuclear differentiation including changes in morphology, nonspecific esterase activity, phagocytic ability, NADPH oxidase activity, mitochondrial respiration, and c-jun mRNA inducibility.@@@@1@47@@oe@19-12-2010 1035901207@GENIA Treebank@formal@@1@S@We conclude that activation of the MEK/ERK signaling pathway is necessary for TPA-induced mononuclear cell differentiation.@@@@1@17@@oe@19-12-2010 1035913801@GENIA Treebank@formal@@1@S@Immune functions, clinical parameters and hormone receptor status in breast cancer patients.@@@@1@14@@oe@19-12-2010 1035913802@GENIA Treebank@formal@@1@S@We have carried out a detailed analysis of the cellular immune functions of breast cancer patients in comparison with healthy controls.@@@@1@22@@oe@19-12-2010 1035913803@GENIA Treebank@formal@@1@S@A possible correlation between immune and clinical parameters was analysed in 50 breast cancer patients.@@@@1@16@@oe@19-12-2010 1035913804@GENIA Treebank@formal@@1@S@Immune parameters, natural killer cell and T lymphocyte functions and the numbers of circulating T lymphocytes were analysed against the clinical parameters comprising the tumour burden, the stage of the disease and the expression of hormone receptors on the tumour.@@@@1@43@@oe@19-12-2010 1035913805@GENIA Treebank@formal@@1@S@In order to analyse the immune function data effectively, low responders were identified with stringent cut-off values.@@@@1@19@@oe@19-12-2010 1035913806@GENIA Treebank@formal@@1@S@Considerably higher proportions of low responders were found among the patient population.@@@@1@13@@oe@19-12-2010 1035913807@GENIA Treebank@formal@@1@S@Elevated numbers of circulating T lymphocytes and CD3-directed cytolysis correlated with the expression of oestrogen receptors independently of the clinical/histological parameters.@@@@1@22@@oe@19-12-2010 1035945701@GENIA Treebank@formal@@1@S@UV-induced CYP1A1 gene expression in human cells is mediated by tryptophan.@@@@1@12@@oe@19-12-2010 1035945702@GENIA Treebank@formal@@1@S@Induction of cytochrome P-4501A1 (CYP1A1) activity by UV has been observed earlier in animal studies via a mechanism that has not yet been resolved.@@@@1@27@@oe@19-12-2010 1035945703@GENIA Treebank@formal@@1@S@Our previous data have indicated that formylated indolocarbazoles which are formed by UV irradiation of tryptophan solutions are very potent Ah-receptor agonists.@@@@1@23@@oe@19-12-2010 1035945704@GENIA Treebank@formal@@1@S@To evaluate the effect of UV light on cytochrome P4501A1 gene expression, we studied the induction of CYP1A1 mRNA by UV irradiation of cultured human keratinocytes (HaCaT cell line), primary human blood lymphocytes and mouse Hepa-1 cells.@@@@1@42@@oe@19-12-2010 1035945705@GENIA Treebank@formal@@1@S@The cells were exposed to UV light delivered by a bank of 6 Philips TL20/12RS sun lamps emitting primarily in the UVB range in the absence and presence of tryptophan.@@@@1@31@@oe@19-12-2010 1035945706@GENIA Treebank@formal@@1@S@A semiquantitative reverse transcriptase-linked polymerase chain reaction (RT-PCR) was used for analysis of gene expression in the treated cells.@@@@1@22@@oe@19-12-2010 1035945707@GENIA Treebank@formal@@1@S@The results show that the CYP1A1 mRNA level induced by UV in the presence of tryptophan was higher than that induced by UV alone in both HaCaT cells and lymphocytes after 3 h of incubation post-UV irradiation.@@@@1@38@@oe@19-12-2010 1035945708@GENIA Treebank@formal@@1@S@To find out if the induction by UV light is caused by the formation of an Ah receptor ligand, Hepa-1 wild-type and Ah receptor deficient c12 cell lines were applied.@@@@1@32@@oe@19-12-2010 1035945709@GENIA Treebank@formal@@1@S@Wild-type (wt) cells were inducible either by the tryptophan photoproduct 6-formylindolo[3,2-b]carbazole (FICZ) or by UV-irradiation but very low or undetectable levels were observed in the c12 cells.@@@@1@38@@oe@19-12-2010 1035945710@GENIA Treebank@formal@@1@S@This shows that the induction of gene expression by FICZ and UV is Ah receptor dependent.@@@@1@17@@oe@19-12-2010 1035945711@GENIA Treebank@formal@@1@S@Together, these results indicate that UV-induced CYP1A1 gene expression in mammalian cells is mediated by an Ah receptor ligand formed from tryptophan.@@@@1@24@@oe@19-12-2010 1035945712@GENIA Treebank@formal@@1@S@Thus, the photoproducts of tryptophan are suggested to be mediators of light via binding to the Ah receptor and as such also could have a role in light-regulated biological rhythms.@@@@1@32@@oe@19-12-2010 1035989401@GENIA Treebank@formal@@1@S@Effects of diesel organic extracts on chemokine production by peripheral blood mononuclear cells.@@@@1@14@@oe@19-12-2010 1035989402@GENIA Treebank@formal@@1@S@BACKGROUND: Polyaromatic hydrocarbons (PAHs) associated with diesel exhaust particles (DEPs) are found in the atmospheric urban pollution.@@@@1@23@@oe@19-12-2010 1035989403@GENIA Treebank@formal@@1@S@Such compounds have been shown to favor IgE production, bronchial hyperresponsiveness, and airway inflammation.@@@@1@17@@oe@19-12-2010 1035989404@GENIA Treebank@formal@@1@S@Chemokines are a group of chemotactic cytokines involved in the recruitment of inflammatory cells.@@@@1@15@@oe@19-12-2010 1035989405@GENIA Treebank@formal@@1@S@OBJECTIVE: We investigated the effect of DEP-PAHs on the release and mRNA expression of IL-8, MCP-1, and RANTES by PBMCs obtained from healthy subjects.@@@@1@28@@oe@19-12-2010 1035989406@GENIA Treebank@formal@@1@S@METHODS: Protein production in supernatants was assessed by ELISA, and mRNA expression was evaluated by semiquantitative RT-PCR.@@@@1@20@@oe@19-12-2010 1035989407@GENIA Treebank@formal@@1@S@RESULTS: Secretion of IL-8 and RANTES increased in a dose-dependent manner with increasing concentrations of DEP-PAHs (range, 0.5 ng to 50 ng/mL).@@@@1@27@@oe@19-12-2010 1035989408@GENIA Treebank@formal@@1@S@On the contrary, the release of MCP-1 was significantly inhibited, also in a dose-dependent manner.@@@@1@18@@oe@19-12-2010 1035989409@GENIA Treebank@formal@@1@S@Messenger RNA production coding for IL-8, RANTES, and MCP-1 showed parallel variations to the production of the correspondent proteins.@@@@1@22@@oe@19-12-2010 1035989410@GENIA Treebank@formal@@1@S@Effects of DEP-PAHs became significant at 7 hours and up to 48 hours time culture for MCP-1, and up to 24 hours time culture for IL-8 and RANTES.@@@@1@30@@oe@19-12-2010 1035989411@GENIA Treebank@formal@@1@S@Moreover, supernatants from DEP-PAH-activated cells, compared with those of controls, exhibited a significantly enhanced chemotactic activity for neutrophils and eosinophils, which was significantly inhibited by pretreatment with anti-IL-8 and anti-RANTES neutralizing antibodies, respectively.@@@@1@39@@oe@19-12-2010 1035989412@GENIA Treebank@formal@@1@S@CONCLUSION: These findings suggest that the chemokine pathways are modulated by DEP-PAHs at the transcriptional level, reinforcing the idea that the development of inflammatory reactions might be affected by diesel exhaust emission.@@@@1@35@@oe@19-12-2010 1036419301@GENIA Treebank@formal@@1@S@Oxidative stress triggers STAT3 tyrosine phosphorylation and nuclear translocation in human lymphocytes.@@@@1@13@@oe@19-12-2010 1036419302@GENIA Treebank@formal@@1@S@Oxidizing agents are powerful activators of factors responsible for the transcriptional activation of cytokine-encoding genes involved in tissue injury.@@@@1@20@@oe@19-12-2010 1036419303@GENIA Treebank@formal@@1@S@In this study we show evidence that STAT3 is a transcription factor whose activity is modulated by H2O2 in human lymphocytes, in which endogenous catalase had previously been inhibited.@@@@1@31@@oe@19-12-2010 1036419304@GENIA Treebank@formal@@1@S@H2O2-induced nuclear translocation of STAT3 to form sequence-specific DNA-bound complexes was evidenced by immunoblotting of nuclear fractions and electrophoretic mobility shift assays, and vanadate was found to strongly synergize with H2O2.@@@@1@33@@oe@19-12-2010 1036419305@GENIA Treebank@formal@@1@S@Moreover, anti-STAT3 antibodies specifically precipitated a protein of 92 kDa that becomes phosphorylated on tyrosine upon lymphocyte treatment with H2O2.@@@@1@22@@oe@19-12-2010 1036419306@GENIA Treebank@formal@@1@S@Phenylarsine oxide, a tyrosine phosphatase inhibitor, and genistein, a tyrosine kinase inhibitor, cooperated and cancelled, respectively, the H2O2-promoted STAT3 nuclear translocation.@@@@1@28@@oe@19-12-2010 1036419307@GENIA Treebank@formal@@1@S@Evidence is also presented, using Fe2+/Cu2+ ions, that.OH generated from H2O2 through Fenton reactions could be a candidate oxygen reactive species to directly activate STAT3.@@@@1@29@@oe@19-12-2010 1036419308@GENIA Treebank@formal@@1@S@Present data suggest that H2O2 and vanadate are likely to inhibit the activity of intracellular tyrosine phosphatase(s), leading to enhanced STAT3 tyrosine phosphorylation and hence its translocation to the nucleus.@@@@1@35@@oe@19-12-2010 1036419309@GENIA Treebank@formal@@1@S@These results demonstrate that the DNA binding activity of STAT3 can be modulated by oxidizing agents and provide a framework to understand the effects of oxidative stress on the JAK-STAT signaling pathway.@@@@1@33@@oe@19-12-2010 1036660001@GENIA Treebank@formal@@1@S@Monocyte adhesion and spreading on human endothelial cells is dependent on Rho-regulated receptor clustering.@@@@1@15@@oe@19-12-2010 1036660002@GENIA Treebank@formal@@1@S@The GTPase Rho is known to mediate the assembly of integrin-containing focal adhesions and actin stress fibers.@@@@1@18@@oe@19-12-2010 1036660003@GENIA Treebank@formal@@1@S@Here, we investigate the role of Rho in regulating the distribution of the monocyte-binding receptors E-selectin, ICAM-1, and VCAM-1 in human endothelial cells.@@@@1@27@@oe@19-12-2010 1036660004@GENIA Treebank@formal@@1@S@Inhibition of Rho activity with C3 transferase or N19RhoA, a dominant negative RhoA mutant, reduced the adhesion of monocytes to activated endothelial cells and inhibited their spreading.@@@@1@30@@oe@19-12-2010 1036660005@GENIA Treebank@formal@@1@S@Similar effects were observed after pretreatment of endothelial cells with cytochalasin D.@@@@1@13@@oe@19-12-2010 1036660006@GENIA Treebank@formal@@1@S@In contrast, dominant negative Rac and Cdc42 proteins did not affect monocyte adhesion or spreading.@@@@1@17@@oe@19-12-2010 1036660007@GENIA Treebank@formal@@1@S@C3 transferase and cytochalasin D did not alter the expression levels of monocyte-binding receptors on endothelial cells, but did inhibit clustering of E-selectin, ICAM-1, and VCAM-1 on the cell surface induced by monocyte adhesion or cross-linking antibodies.@@@@1@41@@oe@19-12-2010 1036660008@GENIA Treebank@formal@@1@S@Similarly, N19RhoA inhibited receptor clustering.@@@@1@7@@oe@19-12-2010 1036660009@GENIA Treebank@formal@@1@S@Monocyte adhesion and receptor cross-linking induced stress fiber assembly, and inhibitors of myosin light chain kinase prevented this response but did not affect receptor clustering.@@@@1@27@@oe@19-12-2010 1036660010@GENIA Treebank@formal@@1@S@Finally, receptor clusters colocalized with ezrin/moesin/radixin proteins.@@@@1@9@@oe@19-12-2010 1036660011@GENIA Treebank@formal@@1@S@These results suggest that Rho is required in endothelial cells for the assembly of stable adhesions with monocytes via the clustering of monocyte-binding receptors and their association with the actin cytoskeleton, independent of stress fiber formation.@@@@1@38@@oe@19-12-2010 1036769801@GENIA Treebank@formal@@1@S@Binding characteristics of the glucocorticoid receptor in peripheral blood lymphocytes in multiple sclerosis.@@@@1@14@@oe@19-12-2010 1036769802@GENIA Treebank@formal@@1@S@Although the exact etiology of multiple sclerosis (MS) remains unresolved, immune reactions are believed to be the central pathogenic mechanisms.@@@@1@24@@oe@19-12-2010 1036769803@GENIA Treebank@formal@@1@S@Endogenous and therapeutic steroid hormones affect the immune system, and inflammatory diseases are associated with activation of the hypothalamic-pituitary-adrenal axis, providing evidence of an immune-endocrine interplay.@@@@1@29@@oe@19-12-2010 1036769804@GENIA Treebank@formal@@1@S@Function tests in MS have revealed dysregulation of the hypothalamic-pituitary-adrenal system in a substantial proportion of patients.@@@@1@18@@oe@19-12-2010 1036769805@GENIA Treebank@formal@@1@S@We characterized glucocorticoid receptor (GR) binding in peripheral blood lymphocytes from 39 MS patients and 14 age- and sex-matched controls with respect to dissociation constant and binding capacity, using a whole-cell binding assay with [3H]dexamethasone as the ligand.@@@@1@42@@oe@19-12-2010 1036769806@GENIA Treebank@formal@@1@S@GR binding parameters did not differ significantly between patients (Kd 8.98 +/- 1.07 nM, Bmax 183 +/- 29.8 fmol/mg) and controls (Kd 9.36 +/- 1.17 nM, Bmax 158 +/- 16 fmol/mg).@@@@1@38@@oe@19-12-2010 1036769807@GENIA Treebank@formal@@1@S@No effect of age, sex, course, duration or severity of disease, or prior steroid treatments was detected.@@@@1@22@@oe@19-12-2010 1036769808@GENIA Treebank@formal@@1@S@GR binding parameters were analyzed in relation to the results of the combined dexamethasone-CRH test, which reflects corticosteroid receptor function at the hypothalamus, in 30 patients and 9 controls.@@@@1@32@@oe@19-12-2010 1036769809@GENIA Treebank@formal@@1@S@While controls showed a moderate correlation between binding affinity of the GR in lymphocytes and regulatory function at the hypothalamic level, the patients did not.@@@@1@27@@oe@19-12-2010 1036769810@GENIA Treebank@formal@@1@S@These data suggest that the physiological relationship between binding and function of the glucocorticoid receptor is disturbed in MS.@@@@1@20@@oe@19-12-2010 1036789701@GENIA Treebank@formal@@1@S@CBP/p300 integrates Raf/Rac-signaling pathways in the transcriptional induction of NF-ATc during T cell activation.@@@@1@15@@oe@19-12-2010 1036789702@GENIA Treebank@formal@@1@S@NF-ATc, an inducibly expressed transcription factor, controls gene expression in T lymphocytes and cardiomyocytes.@@@@1@17@@oe@19-12-2010 1036789703@GENIA Treebank@formal@@1@S@We show here that the transcriptional co-activators CBP/p300 bind to and control the activity of the inducible N-terminal transactivation domain of NF-ATc, TAD-A.@@@@1@25@@oe@19-12-2010 1036789704@GENIA Treebank@formal@@1@S@Similar to the N terminal transactivation domain of c-Jun, TAD-A is inducibly phosphorylated, but this phosphorylation is dispensable for the interaction with CBP/p300.@@@@1@26@@oe@19-12-2010 1036789705@GENIA Treebank@formal@@1@S@Constitutive active versions of c-Raf and Rac synergistically enhance the CBP/p300-mediated increase of TAD-A activity, indicating the important role CBP/p300 plays in the integration of T cell activation signals.@@@@1@31@@oe@19-12-2010 1036789706@GENIA Treebank@formal@@1@S@Since a mutation of CBP abolishing HAT activity is almost as active as wild-type CBP in T cells, functions of CBP/p300 other than histone acetylation appear to control the NF-AT-dependent transcription in T cells.@@@@1@36@@oe@19-12-2010 1036941901@GENIA Treebank@formal@@1@S@Association of the interleukin-4 receptor alpha chain with p47phox, an activator of the phagocyte NADPH oxidase in B cells.@@@@1@21@@oe@19-12-2010 1036941902@GENIA Treebank@formal@@1@S@Interleukin (IL)-4 plays an important role in IgE synthesis in B cells and in Th2 differentiation in T cells.@@@@1@23@@oe@19-12-2010 1036941903@GENIA Treebank@formal@@1@S@IL-4 conducts its biological activities through binding to the IL-4 receptor (IL-4R) on the surface of target cells.@@@@1@21@@oe@19-12-2010 1036941904@GENIA Treebank@formal@@1@S@IL-4R are thought to be composed of the IL-4R alpha chain (IL-4R alpha) and either the IL-2R gamma chain or the IL-13R alpha chain.@@@@1@27@@oe@19-12-2010 1036941905@GENIA Treebank@formal@@1@S@We have previously shown that the membrane-proximal portion in the cytoplasmic domain of the human IL-4R alpha (hIL-4R alpha) is critical for proliferation, generation of germline epsilon transcript, and activation of STAT6, based on analyses of truncated hIL-4R alphas.@@@@1@45@@oe@19-12-2010 1036941906@GENIA Treebank@formal@@1@S@In this study, we found that p47phox, an activator of the phagocyte NADPH oxidase, binds to this portion by the two-hybrid system.@@@@1@26@@oe@19-12-2010 1036941907@GENIA Treebank@formal@@1@S@Furthermore, we observed the association of p47phox with the hIL-4R alpha in B cells derived from a normal donor.@@@@1@21@@oe@19-12-2010 1036941908@GENIA Treebank@formal@@1@S@These results suggest that p47phox is involved in the signal transduction of IL-4 in B cells.@@@@1@17@@oe@19-12-2010 1036941909@GENIA Treebank@formal@@1@S@However, activation of STAT6, CD23 expression, and IgE synthesis induced by IL-4 were not affected in p47phox-deficient patients, which raises the possibility that p47phox may be important in other signaling activities as well in B cells.@@@@1@41@@oe@19-12-2010 1036968101@GENIA Treebank@formal@@1@S@Aiolos transcription factor controls cell death in T cells by regulating Bcl-2 expression and its cellular localization.@@@@1@18@@oe@19-12-2010 1036968102@GENIA Treebank@formal@@1@S@We searched for proteins that interact with Ras in interleukin (IL)-2-stimulated or IL-2-deprived cells, and found that the transcription factor Aiolos interacts with Ras.@@@@1@29@@oe@19-12-2010 1036968103@GENIA Treebank@formal@@1@S@The Ras-Aiolos interaction was confirmed in vitro and in vivo by co-immunoprecipitation.@@@@1@13@@oe@19-12-2010 1036968104@GENIA Treebank@formal@@1@S@Indirect immunofluorescence shows that IL-2 controls the cellular distribution of Aiolos and induces its tyrosine phosphorylation, required for dissociation from Ras.@@@@1@23@@oe@19-12-2010 1036968105@GENIA Treebank@formal@@1@S@We also identified functional Aiolos-binding sites in the Bcl-2 promoter, which are able to activate the luciferase reporter gene.@@@@1@21@@oe@19-12-2010 1036968106@GENIA Treebank@formal@@1@S@Mutation of Aiolos-binding sites within the Bcl-2 promoter inhibits transactivation of the reporter gene luciferase, suggesting direct control of Bcl-2 expression by Aiolos.@@@@1@25@@oe@19-12-2010 1036968107@GENIA Treebank@formal@@1@S@Co-transfection experiments confirm that Aiolos induces Bcl-2 expression and prevents apoptosis in IL-2-deprived cells.@@@@1@15@@oe@19-12-2010 1036968108@GENIA Treebank@formal@@1@S@We propose a model for the regulation of Bcl-2 expression via Aiolos.@@@@1@13@@oe@19-12-2010 1037037201@GENIA Treebank@formal@@1@S@C/EBP beta in rheumatoid arthritis: correlation with inflammation, not disease specificity.@@@@1@14@@oe@19-12-2010 1037037202@GENIA Treebank@formal@@1@S@Rheumatoid arthritis synovial tissue was examined and compared with osteoarthritis tissue for the presence of the nuclear transcription factor C/EBP beta (NF-IL-6).@@@@1@25@@oe@19-12-2010 1037037203@GENIA Treebank@formal@@1@S@The region (lining or sublining), cell type, and subcellular distribution (cytoplasmic or nuclear) of the expression of C/EBP beta was characterized.@@@@1@28@@oe@19-12-2010 1037037204@GENIA Treebank@formal@@1@S@Rheumatoid arthritis synovial fluid and blood and normal peripheral blood were also examined.@@@@1@14@@oe@19-12-2010 1037037205@GENIA Treebank@formal@@1@S@C/EBP beta was detected in the synovial lining and in sublining cells of synovial tissue from patients with both rheumatoid and osteoarthritis.@@@@1@23@@oe@19-12-2010 1037037206@GENIA Treebank@formal@@1@S@A significant (P < 0.001 and < 0.05, respectively) increase in the percentage of cells with nuclear staining was seen in the lining layer, compared to cells in the sublining region, in rheumatoid and osteoarthritis.@@@@1@41@@oe@19-12-2010 1037037207@GENIA Treebank@formal@@1@S@In both diseases a strong correlation (r = 0.79, P < 0.001) was observed between the percentage of cells in the synovial lining that were positive for nuclear C/EBP beta and lining cell depth.@@@@1@38@@oe@19-12-2010 1037037208@GENIA Treebank@formal@@1@S@Two-color immunohistochemistry demonstrated that both macrophages and fibroblast-like synoviocytes were positive for nuclear C/EBP beta.@@@@1@16@@oe@19-12-2010 1037037209@GENIA Treebank@formal@@1@S@The presence of C/EBP beta was confirmed by immunohistochemistry and Western blot analysis with isolated synovial fibroblasts.@@@@1@18@@oe@19-12-2010 1037037210@GENIA Treebank@formal@@1@S@Nuclear C/EBP beta was also detected in rheumatoid synovial fluid monocytes/macrophages, but not in lymphocytes or neutrophils.@@@@1@19@@oe@19-12-2010 1037037211@GENIA Treebank@formal@@1@S@Western blot analysis confirmed the presence of C/EBP beta in these cells.@@@@1@13@@oe@19-12-2010 1037037212@GENIA Treebank@formal@@1@S@The intensity of C/EBP beta staining was greater (P < 0.001) in synovial fluid monocytes than in those from normal or rheumatoid peripheral blood.@@@@1@27@@oe@19-12-2010 1037037213@GENIA Treebank@formal@@1@S@In conclusion, the enhanced nuclear staining for C/EBP beta in the synovial lining, compared to the sublining, suggesting activation in the lining, and the positive correlation of lining layer depth with the percentage of cells in the lining positive for nuclear C/EBP beta, suggest a potential role for C/EBP beta in chronic inflammation.@@@@1@59@@oe@19-12-2010 1037037214@GENIA Treebank@formal@@1@S@The regulation of the production or activity of C/EBP beta, to inhibit inflammatory mediator expression by synovial macrophages and fibroblasts, offers a novel approach to therapeutic intervention.@@@@1@30@@oe@19-12-2010 1037352201@GENIA Treebank@formal@@1@S@p70(s6k) integrates phosphatidylinositol 3-kinase and rapamycin-regulated signals for E2F regulation in T lymphocytes.@@@@1@14@@oe@19-12-2010 1037352202@GENIA Treebank@formal@@1@S@In T lymphocytes, the hematopoietic cytokine interleukin-2 (IL-2) uses phosphatidylinositol 3-kinase (PI 3-kinase)-induced signaling pathways to regulate E2F transcriptional activity, a critical cell cycle checkpoint.@@@@1@33@@oe@19-12-2010 1037352203@GENIA Treebank@formal@@1@S@PI 3-kinase also regulates the activity of p70(s6k), the 40S ribosomal protein S6 kinase, a response that is abrogated by the macrolide rapamycin.@@@@1@26@@oe@19-12-2010 1037352204@GENIA Treebank@formal@@1@S@This immunosuppressive drug is known to prevent T-cell proliferation, but the precise point at which rapamycin regulates T-cell cycle progression has yet to be elucidated.@@@@1@27@@oe@19-12-2010 1037352205@GENIA Treebank@formal@@1@S@Moreover, the effects of rapamycin on, and the role of p70(s6k) in, IL-2 and PI 3-kinase activation of E2Fs have not been characterized.@@@@1@27@@oe@19-12-2010 1037352206@GENIA Treebank@formal@@1@S@Our present results show that IL-2- and PI 3-kinase-induced pathways for the regulation of E2F transcriptional activity include both rapamycin-resistant and rapamycin-sensitive components.@@@@1@24@@oe@19-12-2010 1037352207@GENIA Treebank@formal@@1@S@Expression of a rapamycin-resistant mutant of p70(s6k) in T cells could restore rapamycin-suppressed E2F responses.@@@@1@16@@oe@19-12-2010 1037352208@GENIA Treebank@formal@@1@S@Thus, the rapamycin-controlled processes involved in E2F regulation appear to be mediated by p70(s6k).@@@@1@16@@oe@19-12-2010 1037352209@GENIA Treebank@formal@@1@S@However, the rapamycin-resistant p70(s6k) could not rescue rapamycin inhibition of T-cell cycle entry, consistent with the involvement of additional, rapamycin-sensitive pathways in the control of T-cell cycle progression.@@@@1@32@@oe@19-12-2010 1037352210@GENIA Treebank@formal@@1@S@The present results thus show that p70(s6k) is able to regulate E2F transcriptional activity and provide direct evidence for the first time for a link between IL-2 receptors, PI 3-kinase, and p70(s6k) that regulates a crucial G1 checkpoint in T lymphocytes.@@@@1@44@@oe@19-12-2010 1037354801@GENIA Treebank@formal@@1@S@SOCS-3 is tyrosine phosphorylated in response to interleukin-2 and suppresses STAT5 phosphorylation and lymphocyte proliferation.@@@@1@16@@oe@19-12-2010 1037354802@GENIA Treebank@formal@@1@S@Members of the recently discovered SOCS/CIS/SSI family have been proposed as regulators of cytokine signaling, and while targets and mechanisms have been suggested for some family members, the precise role of these proteins remains to be defined.@@@@1@40@@oe@19-12-2010 1037354803@GENIA Treebank@formal@@1@S@To date no SOCS proteins have been specifically implicated in interleukin-2 (IL-2) signaling in T cells.@@@@1@19@@oe@19-12-2010 1037354804@GENIA Treebank@formal@@1@S@Here we report SOCS-3 expression in response to IL-2 in both T-cell lines and human peripheral blood lymphocytes.@@@@1@19@@oe@19-12-2010 1037354805@GENIA Treebank@formal@@1@S@SOCS-3 protein was detectable as early as 30 min following IL-2 stimulation, while CIS was seen only at low levels after 2 h.@@@@1@25@@oe@19-12-2010 1037354806@GENIA Treebank@formal@@1@S@Unlike CIS, SOCS-3 was rapidly tyrosine phosphorylated in response to IL-2.@@@@1@13@@oe@19-12-2010 1037354807@GENIA Treebank@formal@@1@S@Tyrosine phosphorylation of SOCS-3 was observed upon coexpression with Jak1 and Jak2 but only weakly with Jak3.@@@@1@18@@oe@19-12-2010 1037354808@GENIA Treebank@formal@@1@S@In these experiments, SOCS-3 associated with Jak1 and inhibited Jak1 phosphorylation, and this inhibition was markedly enhanced by the presence of IL-2 receptor beta chain (IL-2Rbeta).@@@@1@31@@oe@19-12-2010 1037354809@GENIA Treebank@formal@@1@S@Moreover, following IL-2 stimulation of T cells, SOCS-3 was able to interact with the IL-2 receptor complex, and in particular tyrosine phosphorylated Jak1 and IL-2Rbeta.@@@@1@29@@oe@19-12-2010 1037354810@GENIA Treebank@formal@@1@S@Additionally, in lymphocytes expressing SOCS-3 but not CIS, IL-2-induced tyrosine phosphorylation of STAT5b was markedly reduced, while there was only a weak effect on IL-3-mediated STAT5b tyrosine phosphorylation.@@@@1@32@@oe@19-12-2010 1037354811@GENIA Treebank@formal@@1@S@Finally, proliferation induced by both IL-2- and IL-3 was significantly inhibited in the presence of SOCS-3.@@@@1@18@@oe@19-12-2010 1037354812@GENIA Treebank@formal@@1@S@The findings suggest that when SOCS-3 is rapidly induced by IL-2 in T cells, it acts to inhibit IL-2 responses in a classical negative feedback loop.@@@@1@28@@oe@19-12-2010 1037469901@GENIA Treebank@formal@@1@S@The role of gamma/delta T cell receptor positive cells in pregnancy.@@@@1@12@@oe@19-12-2010 1037469902@GENIA Treebank@formal@@1@S@PROBLEM: Due to the lack of classical HLA antigens on the trophoblast, fetal antigens are possibly presented in a non major histocompatibility complex (MHC) restricted way.@@@@1@31@@oe@19-12-2010 1037469903@GENIA Treebank@formal@@1@S@Decidual gammadelta T cells, which significantly increase in number during pregnancy, might play a role in recognition of fetal antigens and also in determining the quality of the response to these antigens.@@@@1@35@@oe@19-12-2010 1037469904@GENIA Treebank@formal@@1@S@Our study was aimed at investigating the role of this cell population in progesterone-dependent immunomodulation.@@@@1@16@@oe@19-12-2010 1037469905@GENIA Treebank@formal@@1@S@METHOD OF STUDY: Peripheral lymphocytes from healthy pregnant women and from habitual aborters were tested by immunocytochemistry for the presence of gamma/delta T cell receptor (TCR) and progesterone receptor.@@@@1@33@@oe@19-12-2010 1037469906@GENIA Treebank@formal@@1@S@To investigate the effect of treatment with a pan anti gamma/delta antibody, lymphocytes were incubated for 3 hr with the antibody, and then interleukin (IL)-10, IL-12 and progesterone-induced blocking factor (PIBF) expression (by immuno-cytochemistry) as well as natural killer (NK) cell activity were determined.@@@@1@57@@oe@19-12-2010 1037469907@GENIA Treebank@formal@@1@S@RESULTS: In peripheral blood of healthy pregnant women the percentage of gamma/delta TCR+ cells was significantly higher (P < 0.001) than in that of recurrent aborters or of non-pregnant individuals.@@@@1@34@@oe@19-12-2010 1037469908@GENIA Treebank@formal@@1@S@Ninety-seven percent of gamma/delta TCR+ pregnancy lymphocytes expressed progesterone receptor.@@@@1@11@@oe@19-12-2010 1037469909@GENIA Treebank@formal@@1@S@Binding of a specific antibody to the gamma/delta TCR inhibited PIBF- as well as IL-10 production, whereas it increased NK activity and IL-12 expression.@@@@1@26@@oe@19-12-2010 1037469910@GENIA Treebank@formal@@1@S@CONCLUSIONS: These data suggest the role of gamma/delta TCR-bearing lymphocytes in progesterone-dependent immunomodulation.@@@@1@15@@oe@19-12-2010 1037653101@GENIA Treebank@formal@@1@S@Expression and role of PML gene in normal adult hematopoiesis: functional interaction between PML and Rb proteins in erythropoiesis.@@@@1@21@@oe@19-12-2010 1037653102@GENIA Treebank@formal@@1@S@The expression of the PML gene was investigated in purified early hematopoietic progenitor cells (HPCs) induced to unilineage erythroid or granulocytic differentiation.@@@@1@25@@oe@19-12-2010 1037653103@GENIA Treebank@formal@@1@S@PML mRNA and protein, while barely detectable in quiescent HPCs, are consistently induced by growth factor stimulation through the erythroid or granulocytic lineage.@@@@1@26@@oe@19-12-2010 1037653104@GENIA Treebank@formal@@1@S@Thereafter, PML is downmodulated in late granulocytic maturation, whereas it is sustainably expressed through the erythroid pathway.@@@@1@20@@oe@19-12-2010 1037653105@GENIA Treebank@formal@@1@S@In functional studies, PML expression was inhibited by addition of antisense oligomers targeting PML mRNA (alpha-PML).@@@@1@20@@oe@19-12-2010 1037653106@GENIA Treebank@formal@@1@S@Interestingly, early treatment (day 0 HPCs) with alpha-PML reduced the number of both erythroid and granulocytic colonies, whereas late treatment (day 5 culture) reduced erythroid, but not granulocytic, clonogenesis.@@@@1@38@@oe@19-12-2010 1037653107@GENIA Treebank@formal@@1@S@These findings suggest that PML is required for early hematopoiesis and erythroid, but not granulocytic maturation.@@@@1@18@@oe@19-12-2010 1037653108@GENIA Treebank@formal@@1@S@The pattern of PML expression in normal hematopoiesis mimics that of retinoblastoma pRb 105.@@@@1@15@@oe@19-12-2010 1037653109@GENIA Treebank@formal@@1@S@Combined treatment of HPCs with alpha-PML and alpha-Rb oligomers inhibited both PML and Rb protein expression and completely blocked erythroid colony development.@@@@1@23@@oe@19-12-2010 1037653110@GENIA Treebank@formal@@1@S@Furthermore, PML and pRb 105 were co-immunoprecipitated in cellular lysates derived from erythroid precursors indicating that this functional interaction may have a biochemical basis.@@@@1@26@@oe@19-12-2010 1037653111@GENIA Treebank@formal@@1@S@These results suggest a key functional role of PML in early hematopoiesis and late erythropoiesis: the latter phenomenon may be related to the molecular and functional interaction of PML with pRb 105.@@@@1@34@@oe@19-12-2010 1037889601@GENIA Treebank@formal@@1@S@Signal transduction pathways in normal human monocytes stimulated by cytokines and mediators: comparative study with normal human neutrophils or transformed cells and the putative roles in functionality and cell biology.@@@@1@32@@oe@19-12-2010 1037889602@GENIA Treebank@formal@@1@S@Granulocyte-macrophage colony-stimulating factor (GM-CSF) and interleukin (IL) -3 induced tyrosine phosphorylation of 92-kDa protein in normal human monocytes.@@@@1@23@@oe@19-12-2010 1037889603@GENIA Treebank@formal@@1@S@We identified this 92-kDa protein as STAT5, but not as STATs1, 3, and 6 nor c-fes and vav protooncogene products, and demonstrated its translocation to the nucleus, enhancement of specific DNA binding capacity, and potentiation of trancriptional activity by GM-CSF.@@@@1@47@@oe@19-12-2010 1037889604@GENIA Treebank@formal@@1@S@N-formyl-methionyl-leucyl-phenylalanine (FMLP) and phorbol myristate acetate (PMA) induced tyrosine phosphorylation of 42- and 44-kDa proteins, which were identified as extracellular signal-regulated kinase (ERK), in human monocytes.@@@@1@35@@oe@19-12-2010 1037889605@GENIA Treebank@formal@@1@S@In marked contrast to neutrophils and MO7e cells, GM-CSF did not induce tyrosine phosphorylation and activation of ERK in monocytes.@@@@1@22@@oe@19-12-2010 1037889606@GENIA Treebank@formal@@1@S@Among upstream signaling molecules of ERK, Shc was constitutively associated with Grb2 and was not tyrosine-phosphorylated by GM-CSF and FMLP, and Sos1 and c-Raf-1 were not phosphorylated by GM-CSF, IL-3, TNF, and FMLP in monocytes, whereas all these signaling molecules were affected and/or utilized by GM-CSF in MO7e cells.@@@@1@56@@oe@19-12-2010 1037889607@GENIA Treebank@formal@@1@S@In contrast to neutrophils, p38 was constitutively phosphorylated and agonist-dependent phosphorylation and activation was not detected in human monocytes.@@@@1@21@@oe@19-12-2010 1037889608@GENIA Treebank@formal@@1@S@Superoxide release stimulated by FMLP was inhibited partially by PD98059 or SB203580, a specific inhibitor of ERK or p38 pathway, and was almost completely inhibited by the combination of both inhibitors, whereas PMA-induced superoxide release was resistant to these two inhibitors in monocytes.@@@@1@47@@oe@19-12-2010 1037889609@GENIA Treebank@formal@@1@S@PD98059 inhibited GM-CSF-dependent proliferation of MO7e cells.@@@@1@8@@oe@19-12-2010 1037889610@GENIA Treebank@formal@@1@S@Present results indicate trancriptional roles of STAT5 and functional roles of ERK and/or p38 in normal human monocytes stimulated by physiological receptor-mediated agonists GM-CSF and FMLP.@@@@1@27@@oe@19-12-2010 1037889611@GENIA Treebank@formal@@1@S@Possible roles of ERK in proliferation of transformed cells were also suggested.@@@@1@13@@oe@19-12-2010 1038091501@GENIA Treebank@formal@@1@S@Tyrphostin AG-490 inhibits cytokine-mediated JAK3/STAT5a/b signal transduction and cellular proliferation of antigen-activated human T cells.@@@@1@16@@oe@19-12-2010 1038091502@GENIA Treebank@formal@@1@S@Janus kinase 3 (JAK3) is a cytoplasmic tyrosine kinase required for T cell development and activated by cytokines that utilize the interleukin-2 (IL-2) receptor common gamma chain (gamma(c)).@@@@1@35@@oe@19-12-2010 1038091503@GENIA Treebank@formal@@1@S@Genetic inactivation of JAK3 is manifested as severe combined immunodeficiency disease (SCID) in humans and mice.@@@@1@19@@oe@19-12-2010 1038091504@GENIA Treebank@formal@@1@S@These findings have suggested that JAK3 represents a pharmacological target to control certain lymphoid-derived diseases.@@@@1@16@@oe@19-12-2010 1038091505@GENIA Treebank@formal@@1@S@Here we provide novel evidence that AG-490 potently inhibits the autokinase activity of JAK3 and tyrosine phosphorylation and DNA binding of signal transducer and activator of transcription 5a and 5b (STAT5a/b).@@@@1@34@@oe@19-12-2010 1038091506@GENIA Treebank@formal@@1@S@Similar inhibitory effects were observed with other cytokines that use gamma(c).@@@@1@12@@oe@19-12-2010 1038091507@GENIA Treebank@formal@@1@S@AG-490 also inhibited IL-2-mediated proliferative growth in human T cells with an IC50) = 25 microM that was partially recoverable.@@@@1@21@@oe@19-12-2010 1038091508@GENIA Treebank@formal@@1@S@Moreover, we demonstrate that this inhibitor prevented tetanus toxoid antigen-specific T cell proliferation and expansion but failed to block activation of Zap70 or p56Lck after anti-CD3 stimulation of human T cells.@@@@1@33@@oe@19-12-2010 1038091509@GENIA Treebank@formal@@1@S@Taken together, these findings suggest that AG-490 inhibits the JAK3-mediated Type II signaling pathway but not the T cell receptor-derived Type I pathway and possesses therapeutic potential for T cell-derived pathologies such as graft-versus-host disease, allergy, and autoimmune disorders.@@@@1@43@@oe@19-12-2010 1038150001@GENIA Treebank@formal@@1@S@Genetic evidence for an additional factor required for erythropoietin-induced signal transduction.@@@@1@12@@oe@19-12-2010 1038150002@GENIA Treebank@formal@@1@S@Erythropoietin (EPO) and its receptor (EPOR) are required for the development of mature erythrocytes.@@@@1@19@@oe@19-12-2010 1038150003@GENIA Treebank@formal@@1@S@After binding of ligand, the EPOR activates a variety of signaling pathways that ultimately control cellular proliferation, survival, and specific gene expression.@@@@1@26@@oe@19-12-2010 1038150004@GENIA Treebank@formal@@1@S@Although erythroid progenitors appear to be the principal EPO-responsive cell type in vivo due to the restricted expression of the EPOR, many growth factor-dependent cell lines expressing the EPOR can respond to EPO by activating many or all of these pathways.@@@@1@43@@oe@19-12-2010 1038150005@GENIA Treebank@formal@@1@S@In the present study, we have identified a cellular context (the interleukin-2 [IL-2]-dependent HT-2 line) in which the EPO stimulation of the EPOR fails to support cellular proliferation, STAT-5 induction, or MAPK activation, despite efficient phosphorylation of the EPOR and JAK2 and inhibition of apoptosis after withdrawal of IL-2.@@@@1@59@@oe@19-12-2010 1038150006@GENIA Treebank@formal@@1@S@Interestingly, when we fused HT-2 cells expressing the EPOR with Ba/F3 cells in a complementation assay, the resulting hybridomas proliferated and potently activated STAT-5 and MAPK in response to EPO.@@@@1@33@@oe@19-12-2010 1038150007@GENIA Treebank@formal@@1@S@These data indicate that an unidentified cellular factor is needed to mediate signaling by the EPOR.@@@@1@17@@oe@19-12-2010 1038150008@GENIA Treebank@formal@@1@S@Moreover, Ba/F3 cells apparently express this factor(s) and somatic fusions can, therefore, confer EPO-responsiveness to HT-2 cells that lack this factor.@@@@1@28@@oe@19-12-2010 1038409401@GENIA Treebank@formal@@1@S@Cutting edge: expression of the NF of activated T cells in eosinophils: regulation by IL-4 and IL-5.@@@@1@20@@oe@19-12-2010 1038409402@GENIA Treebank@formal@@1@S@We report that NF-AT1 and NF-AT4 are expressed cytoplasmically in resting eosinophils, whereas NF-AT2 and NF-AT3 have not been seen.@@@@1@22@@oe@19-12-2010 1038409403@GENIA Treebank@formal@@1@S@Likewise, NF-AT1 mRNA and NF-AT4 mRNA have been detected in resting eosinophils, and their levels can be significantly up-regulated by the Th2-associated cytokines IL-4 and IL-5.@@@@1@29@@oe@19-12-2010 1038409404@GENIA Treebank@formal@@1@S@There is no detectable NF-AT protein expression in the nuclei of resting eosinophils.@@@@1@14@@oe@19-12-2010 1038409405@GENIA Treebank@formal@@1@S@However NF-ATs appear in the nuclei of IL-4-, IL-5-, or ionomycin-stimulated eosinophils.@@@@1@15@@oe@19-12-2010 1038409406@GENIA Treebank@formal@@1@S@Only NF-AT1 and NF-AT4, but not NF-AT2 and NF-AT3, have translocated into the nuclei in IL-4- or IL-5-stimulated eosinophils.@@@@1@22@@oe@19-12-2010 1038409407@GENIA Treebank@formal@@1@S@These findings delineate a novel pathway in the cytokine network in which Th2 lymphocytes "control" eosinophils via the release of IL-4 and IL-5, and activation of NF-AT in eosinophils.@@@@1@33@@oe@19-12-2010 1038409408@GENIA Treebank@formal@@1@S@The findings also suggest that a later feedback "talking" may exist between eosinophils and Th2 lymphocytes.@@@@1@19@@oe@19-12-2010 1038415301@GENIA Treebank@formal@@1@S@Altered memory T cell differentiation in patients with early rheumatoid arthritis.@@@@1@12@@oe@19-12-2010 1038415302@GENIA Treebank@formal@@1@S@The chronic immune response in rheumatoid arthritis (RA) might be driven by activated Th1 cells without sufficient Th2 cell differentiation to down-modulate inflammation.@@@@1@26@@oe@19-12-2010 1038415303@GENIA Treebank@formal@@1@S@To test whether disordered memory T cell differentiation contributes to the typical Th1-dominated chronic inflammation in RA we investigated differentiation of resting CD4+ memory T cells in patients with early (6 wk to 12 mo) untreated RA and in age- and sex-matched healthy controls in vitro.@@@@1@49@@oe@19-12-2010 1038415304@GENIA Treebank@formal@@1@S@No difference in cytokine secretion profiles of freshly isolated memory T cells was detected between patients and controls.@@@@1@19@@oe@19-12-2010 1038415305@GENIA Treebank@formal@@1@S@A cell culture system was then employed that permitted the differentiation of Th effectors from resting memory T cells by short term priming.@@@@1@24@@oe@19-12-2010 1038415306@GENIA Treebank@formal@@1@S@Marked differences were found in response to priming.@@@@1@9@@oe@19-12-2010 1038415307@GENIA Treebank@formal@@1@S@Th2 cells could be induced in all healthy controls by priming with anti-CD28 in the absence of TCR ligation.@@@@1@20@@oe@19-12-2010 1038415308@GENIA Treebank@formal@@1@S@By contrast, priming under those conditions resulted in Th2 differentiation in only 9 of 24 RA patients.@@@@1@19@@oe@19-12-2010 1038415309@GENIA Treebank@formal@@1@S@Exogenous IL-4 could overcome the apparent Th2 differentiation defect in seven patients but was without effect in the remaining eight patients.@@@@1@22@@oe@19-12-2010 1038415310@GENIA Treebank@formal@@1@S@In all patients a marked decrease in IL-2-producing cells and a significant increase in well-differentiated Th1 cells that produced IFN-gamma but not IL-2 were evident after priming with anti-CD3 and anti-CD28.@@@@1@32@@oe@19-12-2010 1038415311@GENIA Treebank@formal@@1@S@The data suggest that CD4+ memory T cells from patients with early untreated RA manifest an intrinsic abnormality in their ability to differentiate into specific cytokine-producing effector cells that might contribute to the characteristic Th1-dominated chronic (auto)immune inflammation in RA.@@@@1@44@@oe@19-12-2010 1038565001@GENIA Treebank@formal@@1@S@Functional B-cell response in intrahepatic lymphoid follicles in chronic hepatitis C.@@@@1@12@@oe@19-12-2010 1038565002@GENIA Treebank@formal@@1@S@Intrahepatic lymphoid follicle (ILF) formation is one of the most characteristic and commonly observed histological features in patients with chronic hepatitis C.@@@@1@25@@oe@19-12-2010 1038565003@GENIA Treebank@formal@@1@S@However, little is known regarding whether follicles in the liver belong to functional lymphoid tissues, where B cells are activated, differentiated, and proliferated, or if the lymphocytes are merely infiltrated after recruitment from the secondary lymphoid organs.@@@@1@43@@oe@19-12-2010 1038565004@GENIA Treebank@formal@@1@S@To ascertain this possibility, we examined the expression of markers for B-cell activation, differentiation, and proliferation in ILFs in patients with chronic hepatitis C using surgically resected specimens, and compared them with specimens of perihepatic lymph nodes by an immunohistochemical technique.@@@@1@46@@oe@19-12-2010 1038565005@GENIA Treebank@formal@@1@S@Germinal center (GC) formation in the ILFs was frequently found in HCV-positive cases.@@@@1@16@@oe@19-12-2010 1038565006@GENIA Treebank@formal@@1@S@The distribution of immunoglobulin M (IgM)-, IgD-, and IgG-positive cells and the expression patterns of Ki-67, CD23, or bcl-2 and bcl-6 gene products in the follicles with GC formation in the liver of patients with chronic hepatitis C were similar to those of lymph nodes, indicating that B cells are activated, proliferated, and differentiated in the ILFs with GC formation in patients with chronic hepatitis C.@@@@1@77@@oe@19-12-2010 1038565007@GENIA Treebank@formal@@1@S@Oligoclonal expansion of B cells in the livers with ILFs was confirmed by an analysis of immunoglobulin heavy chain (IgH) gene rearrangement determined by polymerase chain reaction (PCR).@@@@1@33@@oe@19-12-2010 1038565008@GENIA Treebank@formal@@1@S@These data strongly suggest that ILFs with GC formation, which are frequently found in patients with chronic hepatitis C, may functionally be the same as those found in lymph nodes with respect to B-cell expansion and maturation.@@@@1@40@@oe@19-12-2010 1039520101@GENIA Treebank@formal@@1@S@Ovarian and breast cytotoxic T lymphocytes can recognize peptides from the amino enhancer of split protein of the Notch complex.@@@@1@21@@oe@19-12-2010 1039520102@GENIA Treebank@formal@@1@S@In this study we investigated recognition by ovarian tumor associated lymphocyte (OVTAL), and breast tumor associated lymphocytes (BRTAL), of peptides corresponding to the sequence 125-135 of the Aminoenhancer of split (AES) protein.@@@@1@41@@oe@19-12-2010 1039520103@GENIA Treebank@formal@@1@S@Three of these peptides designated as G75:AES1/2 (128-135), G60: AES1/2 (127-137) and G61: AES1/2 (125-133) correspond to the wildtype AES sequence, while the fourth G76:GPLTPLPV, AES1/2 (128-135) corresponds to a variant sequence of the peptide G75 with the N-terminal Leu substituted to glycine.@@@@1@53@@oe@19-12-2010 1039520104@GENIA Treebank@formal@@1@S@These sequences were chosen for study because mass-spectrometric analysis (MS) of a CTL active HPLC peptide fraction eluted from immunoaffinity precipitated HLA-A2 molecule, revealed: (a) the presence of an ion with a mass-to-charge ratio (m/z) of 793 which was more abundant than other ions of similar masses; (b) the tentatively reconstituted sequence of the ion 793 matched the sequence of peptide G76.@@@@1@74@@oe@19-12-2010 1039520105@GENIA Treebank@formal@@1@S@We found that AES peptides G75 (128-135) and G76 (128-135) (L128G) reconstituted CTL recognition at concentrations ranging between 200-500 nM.@@@@1@27@@oe@19-12-2010 1039520106@GENIA Treebank@formal@@1@S@These concentrations are lower than concentrations reported to activate effector function of CTL recognizing other epithelial tumor Ag.@@@@1@19@@oe@19-12-2010 1039520107@GENIA Treebank@formal@@1@S@Furthermore, analysis with cloned CD8+ T cells indicated that G75 and G76 were not cross-reactive specificities, suggesting a key role for the N-terminal residues of the variant peptide in dictating specificities.@@@@1@34@@oe@19-12-2010 1039520108@GENIA Treebank@formal@@1@S@Since the AES proteins are part of a set of transcriptional repressors encoded by the Enhancer of split [E(spl)] genes, and since these repressors are activated to suppress cell differentiation in response to Notch receptors signalling, the AES peptides may represent a novel class of self-antigens that deserve further consideration as tumor Ag in epithelial cancers.@@@@1@61@@oe@19-12-2010 1039629001@GENIA Treebank@formal@@1@S@Clonality analysis using X-chromosome inactivation at the human androgen receptor gene (Humara).@@@@1@15@@oe@19-12-2010 1039629002@GENIA Treebank@formal@@1@S@Evaluation of large cohorts of patients with chronic myeloproliferative diseases, secondary neutrophilia, and reactive thrombocytosis.@@@@1@18@@oe@19-12-2010 1039629003@GENIA Treebank@formal@@1@S@Chronic myeloproliferative diseases (MPDs) are not associated with consistent cytogenetic or molecular abnormalities.@@@@1@16@@oe@19-12-2010 1039629004@GENIA Treebank@formal@@1@S@Demonstration of clonal cell growth by analysis of X-chromosome inactivation (XCI) patterns in females provides a promising tool for diagnosis.@@@@1@23@@oe@19-12-2010 1039629005@GENIA Treebank@formal@@1@S@However, this technique can be complicated by excessive lyonization of normal cells mimicking clonal cell growth: We analyzed XCI patterns at the human androgen receptor (HUMARA) locus in 146 healthy females, 65 women with secondary neutrophilia, 31 women with reactive thrombocytosis, and 86 women with chronic MPDs.@@@@1@55@@oe@19-12-2010 1039629006@GENIA Treebank@formal@@1@S@A skewed XCI pattern with greater than 75% amplification of 1 allele (allele ratio > 3:1) was found in 22 (9.1%) of 242 control subjects.@@@@1@34@@oe@19-12-2010 1039629007@GENIA Treebank@formal@@1@S@The incidence of skewing was statistically significantly lower in women younger than 30 years (2/73) compared with women older than 60 years (10/53).@@@@1@28@@oe@19-12-2010 1039629008@GENIA Treebank@formal@@1@S@Of 86 patients with a chronic MPD, 71 (82%) exhibited an allele ratio greater than 3:1, whereas only 10 (12%) of 86 age-matched control subjects showed a skewed XCI pattern.@@@@1@41@@oe@19-12-2010 1039629009@GENIA Treebank@formal@@1@S@Although statistical evaluation of the data showed a significant difference between patients with a chronic MPD and control subjects, proof of clonality in individual, especially elderly, patients is difficult.@@@@1@33@@oe@19-12-2010 1039772201@GENIA Treebank@formal@@1@S@The glucocorticoid receptor cooperates with the erythropoietin receptor and c-Kit to enhance and sustain proliferation of erythroid progenitors in vitro.@@@@1@21@@oe@19-12-2010 1039772202@GENIA Treebank@formal@@1@S@Although erythropoietin (Epo) is essential for the production of mature red blood cells, the cooperation with other factors is required for a proper balance between progenitor proliferation and differentiation.@@@@1@33@@oe@19-12-2010 1039772203@GENIA Treebank@formal@@1@S@In avian erythroid progenitors, steroid hormones cooperate with tyrosine kinase receptors to induce renewal of erythroid progenitors.@@@@1@19@@oe@19-12-2010 1039772204@GENIA Treebank@formal@@1@S@We examined the role of corticosteroids in the in vitro expansion of primary human erythroid cells in liquid cultures and colony assays.@@@@1@23@@oe@19-12-2010 1039772205@GENIA Treebank@formal@@1@S@Dexamethasone (Dex), a synthetic glucocorticoid hormone, cooperated with Epo and stem cell factor to induce erythroid progenitors to undergo 15 to 22 cell divisions, corresponding to a 10(5)- to 10(6)-fold amplification of erythroid cells.@@@@1@40@@oe@19-12-2010 1039772206@GENIA Treebank@formal@@1@S@Dex acted directly on erythroid progenitors and maintained the colony-forming capacity of the progenitor cells expanded in liquid cultures.@@@@1@20@@oe@19-12-2010 1039772207@GENIA Treebank@formal@@1@S@The hormone delayed terminal differentiation into erythrocytes, which was assayed by morphology, hemoglobin accumulation, and the expression of genes characteristic for immature cells.@@@@1@27@@oe@19-12-2010 1039772208@GENIA Treebank@formal@@1@S@Sustained proliferation of erythroid progenitors could be induced equally well from purified erythroid burst-forming units (BFU-E), from CD34(+) blast cells, and from bone marrow depleted from CD34(+) cells.@@@@1@33@@oe@19-12-2010 1040075501@GENIA Treebank@formal@@1@S@Escape of human cytomegalovirus from HLA-DR-restricted CD4(+) T-cell response is mediated by repression of gamma interferon-induced class II transactivator expression.@@@@1@21@@oe@19-12-2010 1040075502@GENIA Treebank@formal@@1@S@Human cytomegalovirus (HCMV), a betaherpesvirus, is a pathogen which escapes immune recognition through various mechanisms.@@@@1@20@@oe@19-12-2010 1040075503@GENIA Treebank@formal@@1@S@In this paper, we show that HCMV down regulates gamma interferon (IFN-gamma)-induced HLA-DR expression in U373 MG astrocytoma cells due to a defect downstream of STAT1 phosphorylation and nuclear translocation.@@@@1@35@@oe@19-12-2010 1040075504@GENIA Treebank@formal@@1@S@Repression of class II transactivator (CIITA) mRNA expression is detected within the first hours of IFN-gamma-HCMV coincubation and results in the absence of HLA-DR synthesis.@@@@1@28@@oe@19-12-2010 1040075505@GENIA Treebank@formal@@1@S@This defect leads to the absence of presentation of the major immediate-early protein IE1 to specific CD4(+) T-cell clones when U373 MG cells, used as antigen-presenting cells, are treated with IFN-gamma plus HCMV.@@@@1@36@@oe@19-12-2010 1040075506@GENIA Treebank@formal@@1@S@However, presentation of endogenously synthesized IE1 can be restored when U373 MG cells are transfected with CIITA prior to infection with HCMV.@@@@1@24@@oe@19-12-2010 1040075507@GENIA Treebank@formal@@1@S@Altogether, the data indicate that the defect induced by HCMV resides in the activation of the IFN-gamma-responsive promoter of CIITA.@@@@1@22@@oe@19-12-2010 1040075508@GENIA Treebank@formal@@1@S@This is the first demonstration of a viral inhibition of CIITA expression.@@@@1@13@@oe@19-12-2010 1040377001@GENIA Treebank@formal@@1@S@ICSAT overexpression is not sufficient to cause adult T-cell leukemia or multiple myeloma.@@@@1@14@@oe@19-12-2010 1040377002@GENIA Treebank@formal@@1@S@ICSAT (Interferon Consensus Sequence binding protein for Activated T cells) is a lymphocyte-specific member of the interferon regulatory factor (IRF) family of transcription factors, originally identified through Southwestern screening of the ATL(Adult T-cell leukemia)-16T expression library.@@@@1@46@@oe@19-12-2010 1040377003@GENIA Treebank@formal@@1@S@In this study, we created transgenic mice overexpressing ICSAT in lymphocytes.@@@@1@13@@oe@19-12-2010 1040377004@GENIA Treebank@formal@@1@S@Although spontaneous tumorigenesis was not observed, IL-2 production with Concanavalin A stimulation was significantly increased in transgenic mice overexpressing ICSAT.@@@@1@22@@oe@19-12-2010 1040377005@GENIA Treebank@formal@@1@S@ICSAT overexpression in lymphocytes seems insufficient for the leukemogenesis of ATL or multiple myeloma (MM), however, it may regulate T cell activation and its overexpression may lead to leukemogenesis via controlling IL-2 production.@@@@1@38@@oe@19-12-2010 1040377006@GENIA Treebank@formal@@1@S@Copyright 1999 Academic Press.@@@@1@5@@oe@19-12-2010 1040758001@GENIA Treebank@formal@@1@S@Clonality analysis of granulocytes and T lymphocytes in healthy females by the PCR-based HUMARA method.@@@@1@16@@oe@19-12-2010 1040758002@GENIA Treebank@formal@@1@S@Clonality analysis utilizing X-chromosome inactivation has been used in the study of various diseases, including hematological malignancies.@@@@1@19@@oe@19-12-2010 1040758003@GENIA Treebank@formal@@1@S@The human androgen receptor gene (HUMARA) assay is the newest of such methods, and the majority of the female population can be assessed by this relatively simple procedure.@@@@1@32@@oe@19-12-2010 1040758004@GENIA Treebank@formal@@1@S@One problem in using these clonality analysis methods, however, is that there may be significant variation in Lyonization in blood cells in normal individuals.@@@@1@27@@oe@19-12-2010 1040758005@GENIA Treebank@formal@@1@S@To determine the diversity in X-chromosome methylation patterns, which reflect Lyonization, assessed by the HUMARA assay in the supposedly normal population, we analyzed granulocytes and T cells from 97 relatively young (18- to 35-year-old) healthy female volunteers.@@@@1@43@@oe@19-12-2010 1040758006@GENIA Treebank@formal@@1@S@We found that the methylation patterns in the two HUMARA alleles were distributed even more widely, both in granuloctyes and in T cells, than previously reported with other methods.@@@@1@32@@oe@19-12-2010 1040758007@GENIA Treebank@formal@@1@S@We also found that the deviation of methylation in granulocytes and T cells was well correlated.@@@@1@17@@oe@19-12-2010 1040758008@GENIA Treebank@formal@@1@S@Thus, we conclude that appropriate controls from the same individuals, such as T cells in the case of stem cell disorders, should always be employed to conclusively determine whether certain cells of hematopoietic origin are clonal.@@@@1@40@@oe@19-12-2010 1041733301@GENIA Treebank@formal@@1@S@Extracellular signal-regulated protein kinase (ERK)-dependent and ERK-independent pathways target STAT3 on serine-727 in human neutrophils stimulated by chemotactic factors and cytokines.@@@@1@25@@oe@19-12-2010 1041733302@GENIA Treebank@formal@@1@S@STAT3 (signal transducer and activator of transcription 3) is a latent transcription factor that is activated by tyrosine phosphorylation (Tyr-705) in cells stimulated with cytokines or growth factors.@@@@1@33@@oe@19-12-2010 1041733303@GENIA Treebank@formal@@1@S@Recent studies suggest that one or more cytoplasmic serine kinases also phosphorylate STAT3 and are necessary for maximal gene activation.@@@@1@21@@oe@19-12-2010 1041733304@GENIA Treebank@formal@@1@S@Here we demonstrate, with a site-specific antibody, that STAT3 is phosphorylated on Ser-727 in human neutrophils stimulated with chemotactic factors (N-formyl-methionyl-leucyl-phenylalanine and complement C5a), cytokines [granulocyte/macrophage colony-stimulating factor (GM-CSF) and granulocyte colony-stimulating factor (G-CSF)], or a protein kinase C activator (PMA).@@@@1@56@@oe@19-12-2010 1041733305@GENIA Treebank@formal@@1@S@(2-Amino-3'-methoxyphenyl)oxanaphthalen-4-one (PD 98059), an inhibitor of extracellular signal-regulated protein kinase (ERK) activation, blocked the serine phosphorylation of STAT3 induced by chemotactic factors or PMA.@@@@1@31@@oe@19-12-2010 1041733306@GENIA Treebank@formal@@1@S@The drug was less effective on cytokines: it virtually abolished the response to GM-CSF that occurred 5 min after stimulation but only partly decreased those at 15-30 min and did not appreciably alter responses to G-CSF regardless of incubation time.@@@@1@42@@oe@19-12-2010 1041733307@GENIA Treebank@formal@@1@S@1-(5-Isoquinolinylsulphonyl)-2-methylpiperazine dihydrochloride (H7), an inhibitor of a putative STAT3 serine kinase, and 4-(4-fluorophenyl)-2-(4-methylsulphinylphenyl)-5-(4-pyridyl) 1H-imidazole (SB 203580), an inhibitor of p38 mitogen-activated protein (MAP) kinase, did not dampen any of these serine phosphorylation responses.@@@@1@43@@oe@19-12-2010 1041733308@GENIA Treebank@formal@@1@S@We propose that neutrophils use both ERK-dependent and ERK-independent pathways to phosphorylate Ser-727 on STAT3.@@@@1@16@@oe@19-12-2010 1041733309@GENIA Treebank@formal@@1@S@The former pathway is recruited by all ERK-activating stimuli, whereas the latter pathway uses an undefined serine kinase and is recruited selectively by cytokines.@@@@1@26@@oe@19-12-2010 1042178601@GENIA Treebank@formal@@1@S@Activation of STAT5 by IL-4 relies on Janus kinase function but not on receptor tyrosine phosphorylation, and can contribute to both cell proliferation and gene regulation.@@@@1@28@@oe@19-12-2010 1042178602@GENIA Treebank@formal@@1@S@We have investigated mechanisms and consequences of STAT5 activation through the human IL-4 receptor (IL-4R).@@@@1@18@@oe@19-12-2010 1042178603@GENIA Treebank@formal@@1@S@By functionally expressing receptor mutants in the murine pro-B cell line Ba/F3, we could show that phosphorylated tyrosine residues within the IL-4R alpha chain are dispensable for IL-4-induced STAT5 activity.@@@@1@32@@oe@19-12-2010 1042178604@GENIA Treebank@formal@@1@S@However, disruption of a membrane-proximal proline-rich sequence motif ('box1') in either subunit of the bipartite IL-4R abolished not only ligand-induced tyrosine phosphorylation of Janus kinases JAK1 and JAK3, but also IL-4-triggered activation of STAT5 and concomitant cell proliferation.@@@@1@45@@oe@19-12-2010 1042178605@GENIA Treebank@formal@@1@S@A dominant-negative version of STAT5b, but not of STAT5a, interfered with IL-4-induced DNA synthesis in Ba/F3 cells, suggesting an involvement of STAT5b in the control of cell proliferation through IL-4R.@@@@1@34@@oe@19-12-2010 1042178606@GENIA Treebank@formal@@1@S@Reporter gene experiments finally showed that transcription from promoters of STAT5 target genes can be specifically induced by challenging cells with IL-4, and that both STAT5a and STAT5b can contribute to IL-4-triggered transcriptional control.@@@@1@36@@oe@19-12-2010 1042627801@GENIA Treebank@formal@@1@S@MHC-peptide ligand interactions establish a functional threshold for antigen-specific T cell recognition.@@@@1@13@@oe@19-12-2010 1042627802@GENIA Treebank@formal@@1@S@Antigen-specific T cell recognition is dependent on the functional density of the TCR-ligand, which consists of specific MHC molecules and a specifically bound peptide.@@@@1@26@@oe@19-12-2010 1042627803@GENIA Treebank@formal@@1@S@We have examined the influence of the affinity and concentration of exogenous peptide and the density of specific MHC molecules on the proliferation of a CD4+, DQA1*0501/DQB1*0201 (DQ2.1)-restricted, HSV-2-specific T cell clone.@@@@1@38@@oe@19-12-2010 1042627804@GENIA Treebank@formal@@1@S@Using antigen peptide analogs with different mutations of known DQ2-anchor residues, T cell response was reduced in an peptide-affinity and - concentration specific manner.@@@@1@25@@oe@19-12-2010 1042627805@GENIA Treebank@formal@@1@S@The decrease using weaker binding peptides was gradual as stimulation with a peptide with intermediate affinity yielded intermediate T cell proliferation and the poorest binding peptide induced an even weaker T cell response.@@@@1@34@@oe@19-12-2010 1042627806@GENIA Treebank@formal@@1@S@MHC class II density on the APC was modified using DQ2 homo- and heterozygous B-LCLs as APCs, however this variation of MHC concentration had no effect on T cell proliferation.@@@@1@32@@oe@19-12-2010 1042627807@GENIA Treebank@formal@@1@S@We interpret this as a reflection of a low threshold for activation of the T cell clone, in which peptide-MHC avidity is the over-riding determinant of the strength of ligand signal.@@@@1@33@@oe@19-12-2010 1042627901@GENIA Treebank@formal@@1@S@Peptide binding affinity and pH variation establish functional thresholds for activation of HLA-DQ-restricted T cell recognition.@@@@1@17@@oe@19-12-2010 1042627902@GENIA Treebank@formal@@1@S@Peptides derived from the HSV-2 VP16 protein were utilized for studies of peptide binding to DQ0302 molecules and T cell activation at both neutral and acidic pH.@@@@1@28@@oe@19-12-2010 1042627903@GENIA Treebank@formal@@1@S@The native peptide VP16 430-444 contains an Asp at position 442, binds to DQ0302 strongly, with a Kd value of 50nM at acidic pH and very weakly, with a Kd value of greater than 10 microM at neutral pH.@@@@1@43@@oe@19-12-2010 1042627904@GENIA Treebank@formal@@1@S@A truncated version of 430-444, i.e., VP16 433-442, binds with an affinity 10-fold lower compared to 430-444 at acidic pH, and binding at neutral pH was barely detectable.@@@@1@33@@oe@19-12-2010 1042627905@GENIA Treebank@formal@@1@S@The homologous peptide 430-444,442A has an Asp to Ala substitution at position 442 and binds to DQ0302 with a Kd similar to 433-442.@@@@1@24@@oe@19-12-2010 1042627906@GENIA Treebank@formal@@1@S@The short truncated analog 433-442A binds very poorly at both acidic and neutral pH.@@@@1@15@@oe@19-12-2010 1042627907@GENIA Treebank@formal@@1@S@Both the wild type 430-444 and 433-442 peptides stimulated a HSV-specific T cell clone after a brief incubation with antigen presenting cells (APC) expressing DQ0302 at acidic pH.@@@@1@31@@oe@19-12-2010 1042627908@GENIA Treebank@formal@@1@S@Much higher concentrations of wild type peptides were needed to activate T cells at neutral pH.@@@@1@17@@oe@19-12-2010 1042627909@GENIA Treebank@formal@@1@S@In contrast, APC pulsed with Ala-substituted peptides 430-444,442A or 433-442A at neutral pH failed to stimulate the T cell clone, while APC pulsed at acidic pH and subsequently washed led to successful T cell activation.@@@@1@38@@oe@19-12-2010 1042627910@GENIA Treebank@formal@@1@S@The Ala-substituted peptide was recognized by the T cell clone at neutral pH only when it was present in the APC culture throughout the stimulation process.@@@@1@27@@oe@19-12-2010 1042627911@GENIA Treebank@formal@@1@S@While the MHC-peptide complexes formed with the native peptide are stable, complexes formed with the Ala-substituted peptide had a functional t1/2 of less than 4 hr at neutral pH.@@@@1@31@@oe@19-12-2010 1042797101@GENIA Treebank@formal@@1@S@Diminished responses to IL-13 by human monocytes differentiated in vitro: role of the IL-13Ralpha1 chain and STAT6.@@@@1@19@@oe@19-12-2010 1042797102@GENIA Treebank@formal@@1@S@The primary IL-13 receptor complex on human monocytes is believed to be a heterodimer comprised of the IL-4R alpha chain and the IL-2R gamma chain (gamma(c))-like molecule, IL-13R alpha1.@@@@1@34@@oe@19-12-2010 1042797103@GENIA Treebank@formal@@1@S@mRNA levels for IL-13R alpha1, but not IL-4R alpha, were markedly decreased in in vitro monocyte-derived macrophages (MDMac), and with increasing time of monocytes in culture correlated with the loss of IL-13 regulation of lipopolysaccharide-induced TNF-alpha production.@@@@1@43@@oe@19-12-2010 1042797104@GENIA Treebank@formal@@1@S@Analysis of cell lines Daudi and THP-1 that differentially express gamma(c) and IL-13R alpha1 showed that IL-13 can activate STAT6 in IL-13R alpha1-positive THP-1 cells but not in gamma(c)-positive, IL-13R alpha1-negative Daudi cells.@@@@1@35@@oe@19-12-2010 1042797105@GENIA Treebank@formal@@1@S@IL-13 activation of STAT6 was reduced in MDMac which was associated with diminished IL-13-induced expression of CD23 and MHC class II.@@@@1@22@@oe@19-12-2010 1042797106@GENIA Treebank@formal@@1@S@However, with reduced IL-13R alpha1 expression and low nuclear STAT6 activity, some IL-13-induced responses were unaltered in magnitude in MDMac.@@@@1@23@@oe@19-12-2010 1042797107@GENIA Treebank@formal@@1@S@In the absence of functional IL-13R alpha1 and gamma(c), IL-13 must signal through an alternative receptor complex on MDMac.@@@@1@21@@oe@19-12-2010 1042797108@GENIA Treebank@formal@@1@S@Experiments with a blocking antibody to IL-4R alpha showed that this chain remains an essential component of the IL-13 receptor complex on MDMac.@@@@1@24@@oe@19-12-2010 1043002501@GENIA Treebank@formal@@1@S@Monoallelic expression of Pax5: a paradigm for the haploinsufficiency of mammalian Pax genes?@@@@1@15@@oe@19-12-2010 1043002502@GENIA Treebank@formal@@1@S@It is generally assumed that most mammalian genes are transcribed from both alleles.@@@@1@14@@oe@19-12-2010 1043002503@GENIA Treebank@formal@@1@S@Hence, the diploid state of the genome offers the advantage that a loss-of-function mutation in one allele can be compensated for by the remaining wild-type allele of the same gene.@@@@1@32@@oe@19-12-2010 1043002504@GENIA Treebank@formal@@1@S@Indeed, the vast majority of human disease syndromes and engineered mutations in the mouse genome are recessive, indicating that recessiveness is the 'default' state.@@@@1@29@@oe@19-12-2010 1043002505@GENIA Treebank@formal@@1@S@However, a minority of genes are semi-dominant, as heterozygous loss-of-function mutation in these genes leads to phenotypic abnormalities.@@@@1@21@@oe@19-12-2010 1043002506@GENIA Treebank@formal@@1@S@This condition, known as haploinsufficiency, has been described for five of the nine mammalian Pax genes, which are associated with mouse developmental mutants and human disease syndromes.@@@@1@31@@oe@19-12-2010 1043002507@GENIA Treebank@formal@@1@S@Recently we have reported that the Pax5 gene is subject to allele-specific regulation during B cell development.@@@@1@18@@oe@19-12-2010 1043002508@GENIA Treebank@formal@@1@S@Pax5 is predominantly transcribed from only one of its two alleles in early B-lymphoid progenitors and mature B cells, while it transiently switches to a biallelic mode of transcription in pre-B and immature B cells.@@@@1@37@@oe@19-12-2010 1043002509@GENIA Treebank@formal@@1@S@As a consequence, B-lymphoid tissues are mosaic with regard to the transcribed allele, and heterozygous mutation of Pax5 therefore results in deletion of B lymphocytes expressing only the mutant allele.@@@@1@33@@oe@19-12-2010 1043002510@GENIA Treebank@formal@@1@S@The allele-specific regulation of Pax5 raises the intriguing possibility that monoallelic expression may also be the mechanism causing the haploinsufficiency of other Pax genes.@@@@1@25@@oe@19-12-2010 1043002511@GENIA Treebank@formal@@1@S@In this review, we discuss different models accounting for the haploinsufficiency of mammalian Pax genes, provide further evidence in support of the allele-specific regulation of Pax5 and discuss the implication of these findings in the context of the recent literature describing the stochastic and monoallelic activation of other hematopoietic genes.@@@@1@53@@oe@19-12-2010 1043094401@GENIA Treebank@formal@@1@S@The Epstein-Barr virus latency BamHI-Q promoter is positively regulated by STATs and Zta interference with JAK/STAT activation leads to loss of BamHI-Q promoter activity.@@@@1@25@@oe@19-12-2010 1043094402@GENIA Treebank@formal@@1@S@In Epstein-Barr virus (EBV)-associated tumors in nonimmunocompromised patients, EBV gene expression is highly restricted.@@@@1@19@@oe@19-12-2010 1043094403@GENIA Treebank@formal@@1@S@EBV-encoded nuclear antigen (EBNA)-1 is expressed, whereas the immunogenic and proliferative EBNAs are not.@@@@1@19@@oe@19-12-2010 1043094404@GENIA Treebank@formal@@1@S@This pattern of EBNA expression is generated by usage of the BamHI-Q promoter (Qp).@@@@1@17@@oe@19-12-2010 1043094405@GENIA Treebank@formal@@1@S@We have determined that the JAK/STAT pathway positively regulates Qp activity.@@@@1@12@@oe@19-12-2010 1043094406@GENIA Treebank@formal@@1@S@In transient-transfection assays, a Qp-CAT reporter was activated by cotransfected JAK-1 and by treatment of cells with the cytokine IL-6.@@@@1@22@@oe@19-12-2010 1043094407@GENIA Treebank@formal@@1@S@The ability of Qp to bind signal transducer and activator of transcription (STAT) proteins was directly demonstrated by electrophoretic mobility-shift assay, and mutation of potential STAT-binding sites reduced Qp responsiveness to Janus kinase (JAK)-1.@@@@1@41@@oe@19-12-2010 1043094408@GENIA Treebank@formal@@1@S@Consistent with a role for STATs in Qp function, Qp using Burkitt's lymphoma Rael cells and cultured nasopharyngeal carcinoma (NPC) cells contained nuclear STAT protein.@@@@1@30@@oe@19-12-2010 1043094409@GENIA Treebank@formal@@1@S@We investigated whether the inability to maintain EBV-positive NPC cell lines in culture was related to Qp activity.@@@@1@19@@oe@19-12-2010 1043094410@GENIA Treebank@formal@@1@S@Passaging of the NPC cell line HK666 led to activation of expression of BZLF1, which encodes Zta and loss of Qp function.@@@@1@24@@oe@19-12-2010 1043094411@GENIA Treebank@formal@@1@S@Transient expression assays linked Zta expression to the down-regulation of Qp.@@@@1@12@@oe@19-12-2010 1043094412@GENIA Treebank@formal@@1@S@Cotransfection of Zta reduced Qp activity in reporter assays.@@@@1@10@@oe@19-12-2010 1043094413@GENIA Treebank@formal@@1@S@This negative regulation required Zta DNA-binding activity.@@@@1@8@@oe@19-12-2010 1043094414@GENIA Treebank@formal@@1@S@We provide evidence that Zta up-regulation of p53 leads to p53-mediated interference with JAK/STAT activation of Qp.@@@@1@18@@oe@19-12-2010 1043094415@GENIA Treebank@formal@@1@S@The data imply that JAK/STAT signaling has a role in EBV-associated malignancies.@@@@1@13@@oe@19-12-2010 1043337001@GENIA Treebank@formal@@1@S@Selective DNA-binding activity of interleukin-10-stimulated STAT molecules in human monocytes.@@@@1@11@@oe@19-12-2010 1043337002@GENIA Treebank@formal@@1@S@It has been demonstrated that interferon-gamma (IFN-gamma) and interleukin-10 (IL-10) have various reverse effects on macrophages; however, the molecular mechanism of this difference has not been fully understood.@@@@1@35@@oe@19-12-2010 1043337003@GENIA Treebank@formal@@1@S@In this study, we analyzed the binding activity of IL-10- and IFN-gamma-activated STAT molecules to two kinds of GAS-motif sequences.@@@@1@22@@oe@19-12-2010 1043337004@GENIA Treebank@formal@@1@S@IL-10-activated STAT1 could bind to the GAS-motif sequence in the promoter region of the Fcgamma receptor, but not to that in the promoter region of the COX-2 gene, whereas IFN-gamma-activated STAT1 and STAT5 could bind to both sequences.@@@@1@41@@oe@19-12-2010 1043337005@GENIA Treebank@formal@@1@S@IL-10 inhibited IFN-gamma-induced STAT activation without newly synthesized protein.@@@@1@10@@oe@19-12-2010 1043337006@GENIA Treebank@formal@@1@S@We further demonstrated that aspirin, but not dexamethasone, suppressed IFN-gamma-induced STAT activation.@@@@1@15@@oe@19-12-2010 1043337007@GENIA Treebank@formal@@1@S@Taken together, these results suggest that IL-10-activated STAT1 has a specificity in binding to the GAS-motif sequences, whereas IFN-gamma-activated STAT1 and STAT5 have a broader spectrum in binding to the GAS-motif sequences.@@@@1@35@@oe@19-12-2010 1043337008@GENIA Treebank@formal@@1@S@This may explain the difference between IL-10 and IFN-gamma in biological activity, and the inhibitory effect of IL-10 on IFN-gamma activities.@@@@1@23@@oe@19-12-2010 1043558601@GENIA Treebank@formal@@1@S@Block of granulocytic differentiation of 32Dcl3 cells by AML1/ETO(MTG8) but not by highly expressed Bcl-2.@@@@1@19@@oe@19-12-2010 1043558602@GENIA Treebank@formal@@1@S@The chimeric gene, AML1/ETO (MTG8), generated in t(8;21) acute myeloid leukemia enhances the expression of Bcl-2.@@@@1@21@@oe@19-12-2010 1043558603@GENIA Treebank@formal@@1@S@To evaluate whether this enhancement is the primary role of AML1/ETO in leukemogenesis, effects of over-expression of Bcl-2 in the murine myeloid precursor cell line, 32Dcl3, were examined.@@@@1@32@@oe@19-12-2010 1043558604@GENIA Treebank@formal@@1@S@When 32Dcl3 cells expressing exogenous Bcl-2 were induced to differentiate, the onset of morphological differentiation was delayed.@@@@1@19@@oe@19-12-2010 1043558605@GENIA Treebank@formal@@1@S@However, even the cells expressing very high levels of exogenous Bcl-2 eventually underwent differentiation without a significant decrease in the synthesis of Bcl-2.@@@@1@25@@oe@19-12-2010 1043558606@GENIA Treebank@formal@@1@S@On the contrary, 32Dcl3 cells stably expressing AML1/ETO were completely resistant to differentiation and continued to grow in the presence of G-CSF.@@@@1@24@@oe@19-12-2010 1043558607@GENIA Treebank@formal@@1@S@These results are consistent with the interpretation that stimulation of Bcl-2 expression is not the primary target of AML1/ETO.@@@@1@20@@oe@19-12-2010 1043875801@GENIA Treebank@formal@@1@S@The Legionella pneumophila rpoS gene is required for growth within Acanthamoeba castellanii.@@@@1@13@@oe@19-12-2010 1043875802@GENIA Treebank@formal@@1@S@To investigate regulatory networks in Legionella pneumophila, the gene encoding the homolog of the Escherichia coli stress and stationary-phase sigma factor RpoS was identified by complementation of an E. coli rpoS mutation.@@@@1@34@@oe@19-12-2010 1043875803@GENIA Treebank@formal@@1@S@An open reading frame that is approximately 60% identical to the E. coli rpoS gene was identified.@@@@1@19@@oe@19-12-2010 1043875804@GENIA Treebank@formal@@1@S@Western blot analysis showed that the level of L. pneumophila RpoS increased in stationary phase.@@@@1@16@@oe@19-12-2010 1043875805@GENIA Treebank@formal@@1@S@An insertion mutation was constructed in the rpoS gene on the chromosome of L. pneumophila, and the ability of this mutant strain to survive various stress conditions was assayed and compared with results for the wild-type strain.@@@@1@39@@oe@19-12-2010 1043875806@GENIA Treebank@formal@@1@S@Both the mutant and wild-type strains were more resistant to stress when in stationary phase than when in the logarithmic phase of growth.@@@@1@24@@oe@19-12-2010 1043875807@GENIA Treebank@formal@@1@S@This finding indicates that L. pneumophila RpoS is not required for a stationary-phase-dependent resistance to stress.@@@@1@17@@oe@19-12-2010 1043875808@GENIA Treebank@formal@@1@S@Although the mutant strain was able to kill HL-60- and THP-1-derived macrophages, it could not replicate within a protozoan host, Acanthamoeba castellanii.@@@@1@25@@oe@19-12-2010 1043875809@GENIA Treebank@formal@@1@S@These data suggest that L. pneumophila possesses a growth phase-dependent resistance to stress that is independent of RpoS control and that RpoS likely regulates genes that enable it to survive in the environment within protozoa.@@@@1@36@@oe@19-12-2010 1043875810@GENIA Treebank@formal@@1@S@Our data indicate that the role of rpoS in L. pneumophila is very different from what has previously been reported for E. coli rpoS.@@@@1@25@@oe@19-12-2010 1043890301@GENIA Treebank@formal@@1@S@Cutting edge: TCR stimulation by antibody and bacterial superantigen induces Stat3 activation in human T cells.@@@@1@18@@oe@19-12-2010 1043890302@GENIA Treebank@formal@@1@S@Recent data show that TCR/CD3 stimulation induces activation of Stat5 in murine T cells.@@@@1@15@@oe@19-12-2010 1043890303@GENIA Treebank@formal@@1@S@Here, we show that CD3 ligation by mAb and Staphylococcal enterotoxin (SE) induce a rapid, gradually accumulating, long-lasting tyrosine, and serine phosphorylation of Stat3 (but not Stat5) in allogen-specific human CD4+ T cell lines.@@@@1@43@@oe@19-12-2010 1043890304@GENIA Treebank@formal@@1@S@In contrast, IL-2 induces a rapid and transient tyrosine and serine phosphorylation of Stat3.@@@@1@16@@oe@19-12-2010 1043890305@GENIA Treebank@formal@@1@S@Compared with IL-2, CD3 ligation induces a delayed Stat3 binding to oligonucleotide probes from the ICAM-1 and IL-2R alpha promoter.@@@@1@22@@oe@19-12-2010 1043890306@GENIA Treebank@formal@@1@S@CD3-mediated activation of Stat3 is almost completely inhibited by a Src kinase inhibitor (PP1), whereas IL-2-induced Stat3 activation is unaffected.@@@@1@24@@oe@19-12-2010 1043890307@GENIA Treebank@formal@@1@S@In conclusion, we show that CD3 ligation by mAb and SE triggers a rapid, PP1-sensitive tyrosine and serine phosphorylation of Stat3 in human CD4+ T cells.@@@@1@29@@oe@19-12-2010 1043890308@GENIA Treebank@formal@@1@S@Moreover, we provide evidence that TCR/CD3 and IL-2 induce Stat3 activation via distinct signaling pathways.@@@@1@17@@oe@19-12-2010 1044322801@GENIA Treebank@formal@@1@S@[Hormonal metabolic status in breast cancer patients after conservative surgery: comparison with known prognostic criteria]@@@@1@18@@oe@19-12-2010 1044322802@GENIA Treebank@formal@@1@S@Body weight, body mass index, body fat, lean body mass, blood-glucose, cholesterol, HDL-cholesterol, triglyceride, beta-lipoproteins, insulin, gonadotropin, estradiol, testosterone, SHBG, T3, T4 and TSH levels as well as estradiol and progesterone receptor levels in excised tumor were studied in 40 patients with breast cancer prior to conservative treatment.@@@@1@64@@oe@19-12-2010 1044322803@GENIA Treebank@formal@@1@S@Said anthropometric, metabolic and hormonal parameters were compared with the index of lymphocytic infiltration of tumor selected as a prognostic factor.@@@@1@23@@oe@19-12-2010 1044322804@GENIA Treebank@formal@@1@S@A significant correlation between high lymphocytic infiltration (2.5 points), low body mass and fat was identified.@@@@1@20@@oe@19-12-2010 1044322805@GENIA Treebank@formal@@1@S@Also, smoking contributed to loss of body mass and fat; however, it caused lymphocytic infiltration to rise.@@@@1@21@@oe@19-12-2010 1044322806@GENIA Treebank@formal@@1@S@Moderate body mass, relatively low fat level and positive receptor status are among factors of good prognosis in breast cancer of early stages.@@@@1@25@@oe@19-12-2010 1044368801@GENIA Treebank@formal@@1@S@Tumor necrosis factor alpha decreases, and interleukin-10 increases, the sensitivity of human monocytes to dexamethasone: potential regulation of the glucocorticoid receptor.@@@@1@25@@oe@19-12-2010 1044368802@GENIA Treebank@formal@@1@S@Resistance to glucocorticoid therapy has been observed in patients with autoimmune/inflammatory diseases and may be related to the inflammatory process itself.@@@@1@22@@oe@19-12-2010 1044368803@GENIA Treebank@formal@@1@S@The aim of this study was to examine the ability of tumor necrosis factor alpha (TNFalpha, a proinflammatory cytokine) and interleukin (IL)-10 (an anti-inflammatory cytokine) to differentially regulate the sensitivity of human monocytes/macrophages to glucocorticoids.@@@@1@44@@oe@19-12-2010 1044368804@GENIA Treebank@formal@@1@S@To accomplish this, we first analyzed the pattern of TNFalpha and IL-10 inhibition by dexamethasone in LPS-stimulated whole-blood cell cultures.@@@@1@22@@oe@19-12-2010 1044368805@GENIA Treebank@formal@@1@S@Second, we studied the modulation of the sensitivity of these cells to dexamethasone by preincubation with TNFalpha or IL-10 and measurement of LPS-stimulated IL-6 secretion.@@@@1@27@@oe@19-12-2010 1044368806@GENIA Treebank@formal@@1@S@In addition, we evaluated the effect of dexamethasone on phorbolmyristate-acetate-stimulated IL-1 receptor antagonist secretion by the human monocytic cell line U937.@@@@1@23@@oe@19-12-2010 1044368807@GENIA Treebank@formal@@1@S@Finally, we investigated whether the modulation of corticosensitivity in TNFalpha- and IL-10-pretreated U937 cells was related to a change of the glucocorticoid receptor concentration and affinity.@@@@1@28@@oe@19-12-2010 1044368808@GENIA Treebank@formal@@1@S@Dexamethasone had different effects on LPS-induced TNFalpha and IL-10 secretion; whereas it suppressed TNFalpha in a dose-dependent fashion, its effect on IL-10 secretion was biphasic, producing stimulation at lower, and inhibition at higher doses.@@@@1@39@@oe@19-12-2010 1044368809@GENIA Treebank@formal@@1@S@The concentration of LPS employed influenced the effect of dexamethasone on IL-10 secretion (P < 0.001).@@@@1@19@@oe@19-12-2010 1044368810@GENIA Treebank@formal@@1@S@Pretreatment with TNFalpha diminished, and with IL-10 improved, the ability of dexamethasone to suppress IL-6 secretion in whole-blood cell cultures (P < 0.01 for both) and to enhance IL-1 receptor antagonist secretion by U937 cells (P < 0.05 for both).@@@@1@47@@oe@19-12-2010 1044368811@GENIA Treebank@formal@@1@S@TNFalpha decreased (P < 0.001), while IL-10 increased (P < 0.001), the concentration of dexamethasone binding sites in these cells, with no discernible effect on their binding affinity.@@@@1@36@@oe@19-12-2010 1044368812@GENIA Treebank@formal@@1@S@We conclude that glucocorticoids differentially modulate TNFalpha and IL-10 secretion by human monocytes in a LPS dose-dependent fashion and that the sensitivity of these cells to glucocorticoids is altered by TNFalpha or IL-10 pretreatment; TNFalpha blocks their effects, whereas IL-10 acts synergistically with glucocorticoids.@@@@1@47@@oe@19-12-2010 1044368813@GENIA Treebank@formal@@1@S@This is accompanied by opposite glucocorticoid receptor changes, respectively opposing and favoring glucocorticoid actions.@@@@1@16@@oe@19-12-2010 1044368814@GENIA Treebank@formal@@1@S@This study suggests that the pattern of pro-/antiinflammatory cytokine secretion may alter the response of patients to glucocorticoid therapy.@@@@1@20@@oe@19-12-2010