The Transcription Factor T-bet Limits Amplification of Type I IFN Transcriptome and Circuitry in T Helper 1 Cells.

The Transcription Factor T-bet Limits Amplification of Type I IFN Transcriptome and Circuitry in T Helper 1 Cells.
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DOI:
10.1016/j.immuni.2017.05.005
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发表时间:
2017-06-20
期刊:
影响因子:
32.4
通讯作者:
Kanno Y
Kanno Y
中科院分区:
医学1区
文献类型:
--
作者:
Iwata S;Mikami Y;Sun HW;Brooks SR;Jankovic D;Hirahara K;Onodera A;Shih HY;Kawabe T;Jiang K;Nakayama T;Sher A;O'Shea JJ;Davis FP;Kanno Y

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宿主防御需要将CD 4+辅助性T(Th)细胞指定为不同的命运,包括优先产生干扰素-γ(IFN-γ)的Th 1细胞。IFN-γ是抗病原性和抗肿瘤IFN大家族的成员,诱导T-bet,一种Th 1细胞的谱系定义转录因子,这反过来又以前馈方式支持IFN-γ的产生。在此,我们显示了T-bet的细胞内在作用,以影响T细胞如何感知其在环境中的分泌产物。在缺乏T-bet的情况下,IFN-γ异常地诱导I型IFN转录组程序。T-bet优先抑制通常由I型IFN激活的基因和途径,以确保其转录应答不会引起I型IFN信号通路的异常扩增,否则由其自身产物触发。因此,除了促进Th 1效应子定型外,T-bet还在分化的Th 1细胞中充当阻遏物,以防止异常的自分泌I型IFN和下游信号传导。
Host defense requires the specification of CD4+ helper T (Th) cells into distinct fates including Th1 cells that preferentially produce interferon-γ(IFN-γ) IFN-γ, a member of a large family of anti-pathogenic and anti-tumor IFNs, induces T-bet, a lineage defining transcription factor for Th1 cells, which in turn supports IFN-γ production in a feed-forward manner. Herein, we showed a cell intrinsic role of T-bet to influence how T cells perceive their secreted product in the environment. In the absence of T-bet, IFN-γ aberrantly induced a type I IFN transcriptomic program. T-bet preferentially repressed genes and pathways ordinarily activated by type I IFNs to ensure that its transcriptional response does not evoke an aberrant amplification of type I IFN signaling circuitry otherwise triggered by its own product. Thus, in addition to promoting Th1 effector commitment, T-bet acts as a repressor in differentiated Th1 cells to prevent abberant autocrine type I IFN and downstream signaling.
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