T-bet and GATA3 orchestrate Th1 and Th2 differentiation through lineage-specific targeting of distal regulatory elements.

T-bet and GATA3 orchestrate Th1 and Th2 differentiation through lineage-specific targeting of distal regulatory elements.
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DOI:
10.1038/ncomms2260
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发表时间:
2012
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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T-bet 和 GATA3 调节 CD4+ T 细胞 Th1/Th2 细胞的命运决定,但对于小鼠 Ifng 和 Il4/Il5/Il13 基因座之外的这些因素之间的相互作用知之甚少。在这里,我们展示了 T-bet 和 GATA3 与人类效应 T 细胞中免疫调节基因的多个远端位点结合。这些位点显示功能元件的标记,在报告基因检测中充当增强子,并与 T-bet 和 GATA3 的要求相关。此外,我们证明这两个因子都结合 Tbx21 的远端位点,并且 T-bet 直接激活其自身的表达。我们还表明,在 Th1 细胞中,GATA3 分布远离 Th2 基因,而是占据 Th1 基因上的 T-bet 结合位点,并且 T-bet 足以诱导 GATA3 在这些位点结合。我们认为 T-bet 和 GATA3 功能的这些方面对于 Th1/Th2 分化以及理解其他 T 细胞谱系决策中转录因子的相互作用非常重要。 T-bet 和 GATA3 调节 T 细胞分化为 Th1 或 Th2 细胞命运,但人们对它们在 IFNγ 和 Il4 /Il5/Il13 位点之外的功能相互作用知之甚少。坎尼尔等人。将这些因子映射到人类 T 细胞的基因组中,揭示了未被认识到的功能广度以及它们之间的相互作用。
T-bet and GATA3 regulate the CD4+ T cell Th1/Th2 cell fate decision but little is known about the interplay between these factors outside of the murine Ifng and Il4/Il5/Il13 loci. Here we show that T-bet and GATA3 bind to multiple distal sites at immune regulatory genes in human effector T cells. These sites display markers of functional elements, act as enhancers in reporter assays and are associated with a requirement for T-bet and GATA3. Furthermore, we demonstrate that both factors bind distal sites at Tbx21 and that T-bet directly activates its own expression. We also show that in Th1 cells, GATA3 is distributed away from Th2 genes, instead occupying T-bet binding sites at Th1 genes, and that T-bet is sufficient to induce GATA3 binding at these sites. We propose these aspects of T-bet and GATA3 function are important for Th1/Th2 differentiation and for understanding transcription factor interactions in other T cell lineage decisions. T-bet and GATA3 regulate differentiation of T cells into Th1 or Th2 cell fates, but little is known about their functional interaction outside of the IFNγ and Il4 /Il5/Il13 loci. Kanhere et al. map these factors across the genome in human T cells, revealing unappreciated breadth of function and interplay between them.
T-BET的丧失,但不是STAT1阻止了实验性自身免疫性脑脊髓炎的发展。
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