Bcl11b, a novel GATA3-interacting protein, suppresses Th1 while limiting Th2 cell differentiation.

Bcl11b, a novel GATA3-interacting protein, suppresses Th1 while limiting Th2 cell differentiation.
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DOI:
10.1084/jem.20171127
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发表时间:
2018-05-07
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Zhu J
Zhu J
中科院分区:
其他
文献类型:
--
作者:
Fang D;Cui K;Hu G;Gurram RK;Zhong C;Oler AJ;Yagi R;Zhao M;Sharma S;Liu P;Sun B;Zhao K;Zhu J

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Bcl11b 是含有 GATA3 的转录复合物的一种新成分,可在体外和体内抑制 Th2 细胞因子的产生。全基因组分析表明,Bcl11b/GATA3 复合物不仅限制 Th2 反应的强度,还抑制 Th1 特异性基因表达。 GATA 结合蛋白 3 (GATA3) 充当 2 型 T 辅助细胞 (Th2) 细胞分化和功能的主转录因子。然而,GATA3 功能如何在 Th2 细胞中精确调控仍不清楚。在这里,我们发现转录因子 B 细胞淋巴瘤 11b (Bcl11b) 是 GATA3 转录复合物中以前未知的成分,参与 GATA3 介导的基因调控。 Bcl11b 通过蛋白质-蛋白质相互作用与 GATA3 结合,并且它们共定位于 Th2 细胞中许多重要的顺式调控元件。在 Bcl11b 缺陷的 Th2 细胞中,无论体外还是体内,2 型细胞因子(包括 IL-4、IL-5 和 IL-13)的表达均上调;这种上调完全依赖于 GATA3。对 Bcl11b 和 GATA3 调节基因(来自 RNA 测序)、共结合模式(来自染色质免疫沉淀测序)以及 Bcl11b 调节的表观遗传修饰和基因可及性的全基因组分析表明,GATA3/Bcl11b 复合物参与限制 Th2 基因表达,以及抑制非 Th2 基因表达。因此,Bcl11b 控制 Th2 细胞中 GATA3 介导的基因激活和抑制。
Bcl11b, a novel component of GATA3-containing transcriptional complex, inhibits Th2 cytokine production both in vitro and in vivo. Genome-wide analysis indicates that the Bcl11b/GATA3 complex not only limits the magnitude of Th2 response but also suppresses Th1-specific gene expression. GATA-binding protein 3 (GATA3) acts as the master transcription factor for type 2 T helper (Th2) cell differentiation and function. However, it is still elusive how GATA3 function is precisely regulated in Th2 cells. Here, we show that the transcription factor B cell lymphoma 11b (Bcl11b), a previously unknown component of GATA3 transcriptional complex, is involved in GATA3-mediated gene regulation. Bcl11b binds to GATA3 through protein–protein interaction, and they colocalize at many important cis-regulatory elements in Th2 cells. The expression of type 2 cytokines, including IL-4, IL-5, and IL-13, is up-regulated in Bcl11b-deficient Th2 cells both in vitro and in vivo; such up-regulation is completely GATA3 dependent. Genome-wide analyses of Bcl11b- and GATA3-regulated genes (from RNA sequencing), cobinding patterns (from chromatin immunoprecipitation sequencing), and Bcl11b-modulated epigenetic modification and gene accessibility suggest that GATA3/Bcl11b complex is involved in limiting Th2 gene expression, as well as in inhibiting non-Th2 gene expression. Thus, Bcl11b controls both GATA3-mediated gene activation and repression in Th2 cells.
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