Pannexin 1 channels facilitate communication between T cells to restrict the severity of airway inflammation.

Pannexin 1 channels facilitate communication between T cells to restrict the severity of airway inflammation.
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Pannexin 1通道促进T细胞之间的通讯,以限制气道炎症的严重程度。

DOI:
10.1016/j.immuni.2021.06.014
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发表时间:
2021-08-10
期刊:
影响因子:
32.4
通讯作者:
Ravichandran KS
Ravichandran KS
中科院分区:
医学1区
文献类型:
--
作者:
Medina CB;Chiu YH;Stremska ME;Lucas CD;Poon I;Tung KS;Elliott MR;Desai B;Lorenz UM;Bayliss DA;Ravichandran KS

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过敏性气道炎症是由 2 型 CD4+ T 细胞炎症反应驱动的。我们发现了核苷酸释放通道 Panx1 在气道疾病期间 T 细胞串扰中的免疫调节作用。 Panx1 与哮喘患者之间的负相关性以及我们的小鼠模型揭示了 T 细胞中 Panx1 限制炎症的必要性、特异性和充分性。 Global Panx1−/− 小鼠经历了加剧的气道炎症,而 T 细胞特异性缺失的 Panx1−/− 小鼠表型复制。一种旨在在 T 细胞中重新表达 Panx1 的转基因逆转了全球 Panx1−/− 小鼠的疾病严重程度。 Panx1 激活发生在促炎性 Teff 和抑制性 Treg 细胞中,并介导抑制 Teff 细胞增殖所需的基于细胞外核苷酸的 Treg-Teff 串扰。机制研究确定了 Panx1 丝氨酸 205 的盐诱导激酶依赖性磷酸化对于通道激活非常重要。表达不可磷酸化 Panx1S205A 的基因靶向小鼠表现出 Panx1−/− 小鼠中加剧的炎症。这些数据确定了 Panx1 依赖性 Treg:Teff 细胞通讯在限制气道疾病中的作用。虽然已知细胞外核苷酸 (ATP) 很重要,但免疫微环境中 ATP 的来源和调节仍不清楚。麦地那等。等人。表明 CD4+ Teff 和 CD4+ Treg 细胞使用 SIK-Panx1 轴来控制 T 细胞间通讯的核苷酸释放和抑制过敏性气道炎症。
Allergic airway inflammation is driven by type-2 CD4+ T cell inflammatory responses. We uncover an immunoregulatory role for the nucleotide release channel, Panx1, in T cell crosstalk during airway disease. Inverse correlations between Panx1 and asthmatics, and our mouse models revealed the necessity, specificity, and sufficiency of Panx1 in T cells to restrict inflammation. Global Panx1−/− mice experienced exacerbated airway inflammation, and T cell-specific deletion phenocopied Panx1−/− mice. A transgenic designed to re-express Panx1 in T cells reversed disease severity in global Panx1−/− mice. Panx1 activation occurred in pro-inflammatory Teff and inhibitory Treg cells and mediated the extracellular nucleotide based Treg-Teff crosstalk required for suppression of Teff cell proliferation. Mechanistic studies identified a Salt inducible kinase-dependent phosphorylation of Panx1 serine 205 important for channel activation. A genetically targeted mouse expressing non-phosphorylatable Panx1S205A phenocopied the exacerbated inflammation in Panx1−/− mice. These data identify Panx1-dependent Treg:Teff cell communication in restricting airway disease. While extracellular nucleotides (ATP) are known to be important, the source and regulation of ATP at immune microenvironments is still unclear. Medina et. al. show that CD4+ Teff and CD4+ Treg cells use a SIK-Panx1 axis to control nucleotide release for inter-T cell communication and suppression of allergic airway inflammation.
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