STAT1 signaling protects self-reactive T cells from control by innate cells during neuroinflammation.

STAT1 signaling protects self-reactive T cells from control by innate cells during neuroinflammation.
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DOI:
10.1172/jci.insight.148222
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发表时间:
2022-06-22
期刊:
影响因子:
8
通讯作者:
Bettelli, Estelle
Bettelli, Estelle
中科院分区:
医学1区
文献类型:
--
作者:
Arbelaez, Carlos A.;Palle, Pushpalatha;Charaix, Jonathan;Bettelli, Estelle

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转录因子STAT 1在调节产生IL-17和GM-CSF的CD 4 + T细胞的分化中起关键作用,所述IL-17和GM-CSF促进实验性自身免疫性脑脊髓炎(EAE)(多发性硬化(MS)的动物模型)的发展。STAT 1在MS和EAE中的保护作用主要归因于其限制致病性Th细胞和促进TcR的能力。使用选择性缺失T细胞中STAT 1的小鼠(STAT 1CD 4-Cre),我们确定了一种潜在的新机制,STAT 1通过该机制独立于Foxp 3 + T细胞调节神经炎症。STAT 1缺陷的效应T细胞成为NK细胞介导的杀伤的靶点,限制了它们诱导EAE的能力。STAT 1缺陷型T细胞通过产生更多的IL-2来促进自身的杀伤,而IL-2反过来又激活了NK细胞。NK细胞的消除恢复了STAT 1 CD 4-Cre小鼠的EAE易感性。因此,我们的研究表明,STAT 1通路可以被操纵,以限制针对CNS的自身免疫过程中的自身反应性T细胞。
The transcription factor STAT1 plays a critical role in modulating the differentiation of CD4+ T cells producing IL-17 and GM-CSF, which promote the development of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS). The protective role of STAT1 in MS and EAE has been largely attributed to its ability to limit pathogenic Th cells and promote Tregs. Using mice with selective deletion of STAT1 in T cells (STAT1CD4-Cre), we identified a potentially novel mechanism by which STAT1 regulates neuroinflammation independently of Foxp3+ Tregs. STAT1-deficient effector T cells became the target of NK cell–mediated killing, limiting their capacity to induce EAE. STAT1-deficient T cells promoted their own killing by producing more IL-2 that, in return, activated NK cells. Elimination of NK cells restored EAE susceptibility in STAT1CD4-Cre mice. Therefore, our study suggests that the STAT1 pathway can be manipulated to limit autoreactive T cells during autoimmunity directed against the CNS.
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