نتایج جستجو برای: stat4
تعداد نتایج: 718 فیلتر نتایج به سال:
Recent genome-wide association studies suggest that genetic factors contribute to primary biliary cirrhosis (PBC) susceptibility. Although several reports have demonstrated that the interleukin (IL) 12 signaling pathway is involved in PBC pathogenesis, its precise genetic factors have not been fully clarified. Here, we performed an association analysis between IL12A, IL12RB, and signal transduc...
This study examines mechanisms that regulate T helper lymphocyte (Th) 1 commitment in Helicobacter pylori-infected human gastric mucosa. Interferon (IFN)-γ, interleukin (IL)-4, and IL-12 were measured in total extracts of gastric biopsies taken from H. pylori-infected and uninfected patients by enzyme linked immunosorbent assay. STAT4, STAT6, and Tbet were examined in total proteins extracted f...
BACKGROUND Classic Kaposi sarcoma (cKS) is an inflammatory tumor caused by human herpesvirus 8 (HHV-8) commonly observed in elderly men of Mediterranean origin. We studied a Finnish family of 5 affected individuals in 2 generations. Except for atypical mycobacterial infection of the index case, the affected individuals did not have notable histories of infection. METHODS We performed genome a...
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease with complex genetic inheritance. Many reports have provided evidence that signal transducer and activator of transcription-4 (STAT4) may participate in the pathogenesis SLE.The aim was to investigate clinical significance possible association STAT4 (G/T) polymorphism susceptibility SLE cohort Egyptian female patients.Sixty-fiv...
Abstract Most CD4 T cells primed by influenza A virus (IAV) express the transcription factor T-bet, Th1 ‘master regulator’, and are marked phenotypic functional hallmarks. The extent to which STAT1 STAT4 activation, both needed for maximal T-bet induction in vitro, required direct IAV-primed cell responses is not clear. Here, we transferred STAT-deficient (STAT −/−) or wildtype recognizing IAV ...
IFN-alphabeta is a potent immunoregulatory cytokine involved in the defense against viral and bacterial infections. In this study, we describe an as yet undefined IFN-alphabeta-dependent pathway of IFN-gamma induction in mice. This pathway is based on a synergism of IFN-alphabeta and IL-18, and is independent of IL-12 signaling yet dependent on STAT4. In contradiction to current dogma, we show ...
Transcriptional competence of the interferon-gamma (IFN-gamma) locus is enhanced as Th1 effectors develop from naive CD4 T lymphocytes; conversely, this gene is repressed during Th2 differentiation. We now show that the Switch (Swi)-sucrose nonfermenter (SNF) component Brahma-related gene 1 (Brg1) is recruited, and positioned nucleosomes are remodeled, in a Th1-specific manner that is dependent...
The majority of the genome is noncoding and was thought to be nonfunctional. However, it is now appreciated that transcriptional control of protein coding genes resides within these noncoding regions. Thousands of genes encoding long intergenic noncoding RNAs (lincRNAs) have been recently identified throughout the genome, which positively or negatively regulate transcription of neighboring targ...
A transcription factor network that includes STAT4, T-bet, and Runx3 promotes the differentiation of Th1 cells and inflammatory immune responses. How additional transcription factors regulate the function of Th1 cells has not been defined. In this study we show that the negative regulatory factor Twist1 decreases expression of T-bet, Runx3, and IL-12Rβ2 as it inhibits IFN-γ production. Ectopic ...
Catalase (CAT, OMIM: 115500) is an endogenous antioxidant enzyme and genetic variations in the regulatory regions of the CAT gene may alter the CAT enzyme activity and subsequently may alter the risk of oxidative stress related disease. In this study, potential influence(s) of the A-21T (rs7943316) and C-262T (rs1001179) genetic polymorphisms in the CAT promoter region, using the ALGGEN-PROMO.v...
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