The transcription factor T-bet is induced by multiple pathways and prevents an endogenous Th2 cell program during Th1 cell responses.

The transcription factor T-bet is induced by multiple pathways and prevents an endogenous Th2 cell program during Th1 cell responses.
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转录因子 T-bet 由多种途径诱导,并在 Th1 细胞反应期间阻止内源性 Th2 细胞程序。

DOI:
10.1016/j.immuni.2012.09.007
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发表时间:
2012-10-19
期刊:
影响因子:
32.4
通讯作者:
Paul WE
Paul WE
中科院分区:
医学1区
文献类型:
--
作者:
Zhu J;Jankovic D;Oler AJ;Wei G;Sharma S;Hu G;Guo L;Yagi R;Yamane H;Punkosdy G;Feigenbaum L;Zhao K;Paul WE

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T-bet是辅助性T细胞分化的关键转录因子。为了研究T-bet的调控和功能,我们开发了T-bet-ZsGreen报告小鼠品系。我们确定了白细胞介素-12(IL-12)和干扰素-γ(IFN-γ)在诱导弓形虫感染小鼠的T-bet中是多余的,并且当IL-12和IFN-γ诱导时,T-bet对其自身的表达没有贡献。相比之下,T-bet和转录因子Stat 4对于IFN-γ产生是关键的,而IFN-γ信号传导对于诱导IFN-γ是不重要的。T-bet的缺失导致内源性程序的激活,该程序驱动表达T-bet-ZsGreen的细胞中的Th 2细胞分化。全基因组分析表明,T-bet直接诱导许多Th 1细胞相关基因,但间接抑制Th 2细胞相关基因。我们的研究揭示了在调节T-bet和IFN-γ的表达中,几种Th 1细胞诱导途径之间的冗余和协同作用,以及T-bet在抑制内源性Th 2细胞相关程序中的关键作用。
T-bet is a critical transcription factor for T helper-1 (Th1) cell differentiation. To study the regulation and functions of T-bet, we developed a T-bet-ZsGreen reporter mouse strain. We determined that interleukin-12 (IL-12) and interferon-γ (IFN-γ) were redundant in inducing T-bet in mice infected with Toxoplasma gondii and that T-bet did not contribute to its own expression when induced by IL-12 and IFN-γ. By contrast, T-bet and the transcription factor Stat4 were critical for IFN-γ production whereas IFN-γ signaling was dispensable for inducing IFN-γ. Loss of T-bet resulted in activation of an endogenous program driving Th2 cell differentiation in cells expressing T-bet-ZsGreen. Genome-wide analyses indicated that T-bet directly induced many Th1 cell-related genes but indirectly suppressed Th2 cell-related genes. Our study revealed redundancy and synergy among several Th1 cell-inducing pathways in regulating the expression of T-bet and IFN-γ, and a critical role of T-bet in suppressing an endogenous Th2 cell-associated program.
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