H2-O deficiency promotes regulatory T cell differentiation and CD4 T cell hyperactivity.

H2-O deficiency promotes regulatory T cell differentiation and CD4 T cell hyperactivity.
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H2-O缺乏促进调节性T细胞分化和CD 4 T细胞过度活跃。

DOI:
10.3389/fimmu.2023.1304798
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发表时间:
2023
影响因子:
7.3
通讯作者:
--
中科院分区:
医学2区
文献类型:
--
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调节性T细胞(Treg)是重要的免疫调节因子,但胸腺Treg发育的确切机制仍存在争议。在这里,我们提出了第一个直接的证据,H2-O,MHC II类肽编辑分子伴侣,选择胸腺T细胞。我们发现胸腺髓质中缺乏H2-O促进胸腺Treg发育并导致外周Treg频率增加。脾CD 4 T细胞的单细胞RNA测序(scRNA-seq)分析显示,在不存在H2-O的情况下,不仅富集了效应子样T细胞,而且活化了CD 4 T细胞。我们的数据支持两个概念:a)胸腺髓质中H2-O表达的缺乏产生了允许Treg发育的环境,和B)H2-O的丧失驱动了CD 4 T细胞的基础自身刺激的增加。这些发现有助于更好地理解自身免疫的易感性和设计治疗自身免疫性疾病的疗法。
Regulatory T cells (Treg) are crucial immune modulators, yet the exact mechanism of thymic Treg development remains controversial. Here, we present the first direct evidence for H2-O, an MHC class II peptide editing molecular chaperon, on selection of thymic Tregs. We identified that lack of H2-O in the thymic medulla promotes thymic Treg development and leads to an increased peripheral Treg frequency. Single-cell RNA-sequencing (scRNA-seq) analysis of splenic CD4 T cells revealed not only an enrichment of effector-like Tregs, but also activated CD4 T cells in the absence of H2-O. Our data support two concepts; a) lack of H2-O expression in the thymic medulla creates an environment permissive to Treg development and, b) that loss of H2-O drives increased basal auto-stimulation of CD4 T cells. These findings can help in better understanding of predispositions to autoimmunity and design of therapeutics for treatment of autoimmune diseases.
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