The IFN-γ receptor promotes immune dysregulation and disease in STING gain-of-function mice.

The IFN-γ receptor promotes immune dysregulation and disease in STING gain-of-function mice.
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DOI:
10.1172/jci.insight.155250
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发表时间:
2022-09-08
期刊:
影响因子:
8
通讯作者:
Miner, Jonathan J.
Miner, Jonathan J.
中科院分区:
医学1区
文献类型:
--
作者:
Stinson, W. Alexander;Miner, Cathrine A.;Zhao, Fang R.;Lundgren, Annena Jane;Poddar, Subhajit;Miner, Jonathan J.

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STING 功能获得性突变会导致人类婴儿期发病的 STING 相关血管病 (SAVI),这是一种以自发性肺部炎症和纤维化为特征的疾病。具有 STING 功能获得性突变的小鼠(SAVI 小鼠)会出现 αβ T 细胞依赖性肺病,并且缺乏淋巴结。尽管 SAVI 被认为是 I 型干扰素病,但三种干扰素受体的相对贡献尚不完全清楚。在这里,我们表明,STING 的功能获得导致 SAVI 小鼠肺部 IFN-γ 诱导的趋化因子上调,并且删除 II 型 IFN 受体 (IFNGR1),但不删除 I 型 IFN 受体 (IFNAR1) 或 III 型 IFN 受体 (IFNλR1),从而改善 SAVI 小鼠的肺部疾病并恢复淋巴结发育。此外,删除 IFNGR1(而非 IFNAR1 或 IFNλR1)可以纠正 SAVI 小鼠和混合骨髓嵌合小鼠中效应子与 Tregs 的比例。最后,就 Cxcl9 上调和细胞激活而言,培养的 SAVI 小鼠巨噬细胞对 IFN-γ 高度敏感,但对 IFN-β 不敏感。这些结果表明 IFNGR1 在 STING 功能获得介导的自身炎症和免疫失调中发挥重要作用。
STING gain-of-function mutations cause STING-associated vasculopathy with onset in infancy (SAVI) in humans, a disease characterized by spontaneous lung inflammation and fibrosis. Mice with STING gain-of-function mutations (SAVI mice) develop αβ T cell–dependent lung disease and also lack lymph nodes. Although SAVI has been regarded as a type I interferonopathy, the relative contributions of the three interferon receptors are incompletely understood. Here, we show that STING gain of function led to upregulation of IFN-γ–induced chemokines in the lungs of SAVI mice and that deletion of the type II IFN receptor (IFNGR1), but not the type I IFN receptor (IFNAR1) or type III IFN receptor (IFNλR1), ameliorated lung disease and restored lymph node development in SAVI mice. Furthermore, deletion of IFNGR1, but not IFNAR1 or IFNλR1, corrected the ratio of effector to Tregs in SAVI mice and in mixed bone marrow chimeric mice. Finally, cultured SAVI mouse macrophages were hyperresponsive to IFN-γ, but not IFN-β, in terms of Cxcl9 upregulation and cell activation. These results demonstrate that IFNGR1 plays a major role in autoinflammation and immune dysregulation mediated by STING gain of function.
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最前沿:T 细胞中 STING 的激活可诱导 I 型 IFN 反应和细胞死亡。
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