Ubiquitin-specific peptidase 18 regulates the differentiation and function of Treg cells.

Ubiquitin-specific peptidase 18 regulates the differentiation and function of Treg cells.
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DOI:
10.1016/j.gendis.2020.03.004
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发表时间:
2021-05
期刊:
影响因子:
6.8
通讯作者:
Liu C
Liu C
中科院分区:
医学2区
文献类型:
--
作者:
Yang L;Jing Y;Kang D;Jiang P;Li N;Zhou X;Chen Y;Westerberg LS;Liu C

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泛素特异性肽酶18(USP18)在CD11b +树突状细胞(DCs)和Th17细胞的发育中发挥着重要作用,然而,其在其他T细胞亚群分化中的作用,尤其是在调节性T(Treg)细胞中的作用尚不清楚。在我们的研究中,我们使用Usp18基因敲除(KO)小鼠来研究USP18缺失对Treg细胞分化和功能的影响。我们发现,USP18缺陷会上调Treg细胞的分化,这可能导致外周T细胞稳态失衡,同时下调产生干扰素-γ(INF-γ)、白细胞介素-2(IL-2)、白细胞介素-17A(IL-17A)的CD4 + T细胞以及产生INF-γ的CD8 + T细胞。从机制上讲,我们还发现Tregs的上调是由于Usp18基因敲除小鼠中CD25表达升高所致。最后,我们发现Usp18基因敲除的Tregs的抑制功能下调。总之,我们的研究首次明确了USP18在Tregs分化及其抑制功能中的作用,这可能为许多自身免疫性疾病中Treg功能的治疗提供新的参考,并且USP18可作为精准医疗的一个新治疗靶点。
Ubiquitin-specific peptidase 18 (USP18) plays an important role in the development of CD11b+ dendritic cells (DCs) and Th17 cells, however, its role in the differentiation of other T cell subsets, especially in regulatory T (Treg) cells, is unknown. In our study, we used Usp18 KO mice to study the loss of USP18 on the impact of Treg cell differentiation and function. We found that USP18 deficiency upregulates the differentiation of Treg cells, which may lead to disrupted homeostasis of peripheral T cells, and downregulates INF-γ, IL-2, IL-17A producing CD4+ T cells and INF-γ producing CD8+ T cells. Mechanistically, we also found that the upregulation of Tregs is due to elevated expression of CD25 in Usp18 KO mice. Finally, we found that the suppressive function of Usp18 KO Tregs is downregulated. Altogether, our study was the first to identify the role of USP18 in Tregs differentiation and its suppressive function, which may provide a new reference for the treatment of Treg function in many autoimmune diseases, and USP18 can be used as a new therapeutic target for precise medical treatment.
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