Blimp-1 directly represses Il2 and the Il2 activator Fos, attenuating T cell proliferation and survival.

Blimp-1 directly represses Il2 and the Il2 activator Fos, attenuating T cell proliferation and survival.
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DOI:
10.1084/jem.20080526
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发表时间:
2008-09-01
影响因子:
15.3
通讯作者:
Calame, Kathryn
Calame, Kathryn
中科院分区:
医学1区
文献类型:
--
作者:
Martins, Gislaine A.;Cimmino, Luisa;Liao, Jerry;Magnusdottir, Erna;Calame, Kathryn

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编码Blimp-1的Prdm 1的T细胞特异性缺失的小鼠具有异常的T细胞稳态并发生致命性结肠炎。在这项研究中,我们表明,在T细胞中的Blimp-1的一个关键活动是抑制IL-2,它这样做是通过直接抑制IL-2的转录,也通过抑制Fos转录。使用这些机制,Blimp-1参与了IL-2诱导Prdm 1表达的自动调节环,从而在T细胞活化后抑制其自身的表达,确保适当控制免疫应答。Blimp-1的这种活性对于细胞因子剥夺诱导的T细胞死亡和在体外和体内的抗原特异性应答中减弱T细胞增殖是重要的。
Mice with a T cell–specific deletion of Prdm1, encoding Blimp-1, have aberrant T cell homeostasis and develop fatal colitis. In this study, we show that one critical activity of Blimp-1 in T cells is to repress IL-2, and that it does so by direct repression of Il2 transcription, and also by repression of Fos transcription. Using these mechanisms Blimp-1 participates in an autoregulatory loop by which IL-2 induces Prdm1 expression and thus represses its own expression after T cell activation, ensuring that the immune response is appropriately controlled. This activity of Blimp-1 is important for cytokine deprivation–induced T cell death and for attenuating T cell proliferation in antigen-specific responses both in vitro and in vivo.
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发表时间: 1994-03-01
影响因子: 5.3
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