Opposing regulation of the locus encoding IL-17 through direct, reciprocal actions of STAT3 and STAT5.

Opposing regulation of the locus encoding IL-17 through direct, reciprocal actions of STAT3 and STAT5.
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DOI:
10.1038/ni.1995
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发表时间:
2011-03
期刊:
影响因子:
30.5
通讯作者:
--
中科院分区:
医学1区
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--
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IL-2是一种与人类自身免疫性疾病相关的细胞因子,它限制了IL-17的产生。我们发现,T细胞中STAT 3的缺失消除了IL-17的产生,并减弱了与IL-2缺乏相关的自身免疫。STAT 3诱导IL-17和RORγt并抑制FOXP 3,而IL-2独立于FOXP 3和RORγt抑制IL-17。我们发现STAT 3和STAT 5结合到Il 17基因座上的多个共同位点。IL-2对STAT 5结合的诱导与这些位点的STAT 3结合减少以及相关活性表观遗传标记的抑制相关。滴定STAT 3和STAT 5的相对活化调节Th 17细胞特化,因此,这些信号的平衡而不是绝对大小决定了细胞产生关键炎性细胞因子的倾向。
IL-2, a cytokine linked to human autoimmune diseases, limits IL-17 production. We show that deletion of STAT3 in T cells abrogates IL-17 production and attenuates autoimmunity associated with IL-2 deficiency. While STAT3 induces IL-17 and RORγt and inhibits FOXP3, IL-2 inhibited IL-17 independently of FOXP3 and RORγt. We found that STAT3 and STAT5 bound to multiple common sites across the Il17 genetic locus. The induction of STAT5 binding by IL-2 was associated with a reduction in STAT3 binding at these sites and the inhibition of associated active epigenetic marks. Titrating the relative activation of STAT3 and STAT5 modulated Th17 cell specification and thus, the balance rather than the absolute magnitude of these signals determine the propensity of cells to make a key inflammatory cytokine.
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