Early Th1 cell differentiation is marked by a Tfh cell-like transition.

Early Th1 cell differentiation is marked by a Tfh cell-like transition.
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DOI:
10.1016/j.immuni.2011.11.012
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发表时间:
2011-12-23
期刊:
影响因子:
32.4
通讯作者:
O'Shea JJ
O'Shea JJ
中科院分区:
医学1区
文献类型:
--
作者:
Nakayamada S;Kanno Y;Takahashi H;Jankovic D;Lu KT;Johnson TA;Sun HW;Vahedi G;Hakim O;Handon R;Schwartzberg PL;Hager GL;O'Shea JJ

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滤泡辅助 T (Tfh) 细胞是辅助 T 细胞的重要子集;然而,他们与其他辅助血统的关系尚不完全清楚。在此,我们展示了白介素 12 通过转录因子 STAT4 诱导 Il21 和 Bcl6 基因发挥作用,产生具有 Tfh 和 Th1 细胞特征的细胞。然而,STAT4 还诱导转录因子 T-bet。使用 ChIP-seq,我们定义了 T-bet 的全基因组靶点,发现它抑制 Bcl6 和 Tfh 细胞的其他标记物,从而减弱 Th1 细胞分化后期新生的 Tfh 样表型。小鼠弓形虫感染后,Tfh 样 T 细胞迅速产生,但 T-bet 限制了 Tfh 细胞的扩增以及随后的生发中心形成和抗体产生。我们的数据表明,Tfh 和 Th1 细胞通过 STAT4 介导的信号共享一个过渡阶段,该信号促进两种表型。然而,T-bet 会抑制 Tfh 细胞功能,促进 Th1 细胞完全分化。
Follicular helper T (Tfh) cells comprise an important subset of helper T cells; however, their relationship with other helper lineages is incompletely understood. Herein, we showed interleukin-12 acting via the transcription factor STAT4 induced both Il21 and Bcl6 genes, generating cells with features of both Tfh and Th1 cells. However, STAT4 also induced the transcription factor T-bet. Using ChIP-seq, we defined the genome-wide targets of T-bet and found that it repressed Bcl6 and other markers of Tfh cells, thereby attenuating the nascent Tfh-like phenotype in the late phase of Th1 cell specification. Tfh-like T cells were rapidly generated following Toxoplasma gondii infection in mice, but T-bet constrained Tfh cells expansion and consequent germinal center formation and antibody production. Our data argue that Tfh and Th1 cells share a transitional stage through the signal mediated by STAT4, which promotes both phenotypes. However, T-bet represses Tfh cell functionalities, promoting full Th1 cell differentiation.
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