Batf stabilizes Th17 cell development via impaired Stat5 recruitment of Ets1-Runx1 complexes.

Batf stabilizes Th17 cell development via impaired Stat5 recruitment of Ets1-Runx1 complexes.
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DOI:
10.15252/embj.2021109803
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发表时间:
2023-04-17
期刊:
The EMBO journal
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其他
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尽管激活蛋白-1(AP-1)因子BATF是Th17细胞发育所必需的,但其支持Th17计划的作用机制尚不完全清楚。在这里,我们发现BATF通过抑制IL-2表达和IL-2诱导的Stat5激活来限制替代基因程序,从而部分地确保了Th17细胞的身份。这反过来又将依赖Stat5的Ets1-RUNX1因子的招募限制在Th1和Treg细胞特定的基因位点。因此,除了Th17特异性基因座上的开创性调控元件外,BATF还间接地抑制Stat5-Ets1-RUNX1复合体的组装,从而增强Th1和Treg细胞特异性基因的转录。这些发现揭示了Stat5-Ets1-RUNX1相互作用在转录网络中的重要作用,该网络定义了T细胞的交替命运,并表明BATF通过调节Stat5组装的增强体的竞争行为在诱导和维持Th17计划方面发挥了不可或缺的作用,这些增强体促进Th1和Treg细胞的发育。BATF损害Stat5-Ets1-RUNX1复合体的组装,该复合体促进Th1和Treg细胞发育程序,以维持Th17细胞的特性。
Although the activator protein‐1 (AP‐1) factor Batf is required for Th17 cell development, its mechanisms of action to underpin the Th17 program are incompletely understood. Here, we find that Batf ensures Th17 cell identity in part by restricting alternative gene programs through its actions to restrain IL‐2 expression and IL‐2‐induced Stat5 activation. This, in turn, limits Stat5‐dependent recruitment of Ets1‐Runx1 factors to Th1‐ and Treg‐cell‐specific gene loci. Thus, in addition to pioneering regulatory elements in Th17‐specific loci, Batf acts indirectly to inhibit the assembly of a Stat5‐Ets1‐Runx1 complex that enhances the transcription of Th1‐ and Treg‐cell‐specific genes. These findings unveil an important role for Stat5‐Ets1‐Runx1 interactions in transcriptional networks that define alternate T cell fates and indicate that Batf plays an indispensable role in both inducing and maintaining the Th17 program through its actions to regulate the competing actions of Stat5‐assembled enhanceosomes that promote Th1‐ and Treg‐cell developmental programs. Batf impairs assembly of a Stat5‐Ets1‐Runx1 complex that promotes Th1 and Treg‐cell developmental programs to maintain Th17 cell identity.
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