CCR6 is required for epidermal trafficking of γδ-T cells in an IL-23-induced model of psoriasiform dermatitis.

CCR6 is required for epidermal trafficking of γδ-T cells in an IL-23-induced model of psoriasiform dermatitis.
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DOI:
10.1038/jid.2012.260
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发表时间:
2013-01
影响因子:
6.5
通讯作者:
Hwang, Sam T.
Hwang, Sam T.
中科院分区:
医学1区
文献类型:
--
作者:
Mabuchi, Tomotaka;Singh, Tej Pratap;Takekoshi, Tomonori;Jia, Guang-fu;Wu, Xuesong;Kao, Mandy C.;Weiss, Ido;Farber, Joshua M.;Hwang, Sam T.

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小鼠皮肤中表达Th 17细胞因子的CCR 6+,γδ-低(GDL)T细胞亚群参与IL-23诱导的银屑病样皮炎。我们使用CCR 6缺陷(KO)和野生型(WT)小鼠来分析GDL T细胞和功能阻断mAb的皮肤运输模式,以确定CCR 6在IL-23介导的皮炎中的作用。在本文中,早在初始处理后24小时,在注射IL-23的WT小鼠耳部皮肤中,CCL 20高度上调,并且在注射IL-23的WT小鼠的表皮中观察到大量的CCR 6+细胞。抗CCL 20 mAb减少了银屑病样皮炎并阻断了GDL T细胞向表皮的募集。在CCR 6 KO小鼠中,GDL T细胞在IL-23处理后未能在表皮中积累,但WT和CCR 6 KO小鼠真皮中的GDL T细胞总数相等。CCR 6 KO小鼠真皮中IL-22+ GDL T细胞的比例降低约70%(与WT小鼠相比),表明CCR 6缺陷型小鼠中效应子功能以及GDL T细胞的表皮募集受损。因此,这些数据表明CCR 6调节皮肤中γδ T细胞亚群的表皮运输,并表明CCR 6作为银屑病治疗靶标的潜力。
A subset of CCR6+, γδ-low (GDL) T cells that express Th17 cytokines in mouse skin participates in IL-23-induced psoriasisform dermatitis. We use CCR6-deficient (KO) and wildtype (WT) mice to analyze skin trafficking patterns of GDL T cells and function-blocking mAbs to determine the role of CCR6 in IL-23-mediated dermatitis. Herein, CCL20 was highly upregulated in IL-23-injected WT mouse ear skin as early as 24 hours after initial treatment, and large numbers of CCR6+ cells were observed in the epidermis of IL-23-injected WT mice. Anti-CCL20 mAbs reduced psoriasiform dermatitis and blocked recruitment of GDL T cells to the epidermis. In CCR6 KO mice, GDL T cells failed to accumulate in the epidermis after IL-23 treatment, but total numbers of GDL T cells in the dermis of WT and CCR6 KO mice were equivalent. There was a ~70% reduction in the proportion of IL-22+ GDL T cells in the dermis of CCR6 KO mice (vs. WT mice), suggesting that effector function as well as epidermal recruitment of GDL T cells are impaired in CCR6-deficient mice. Thus, these data show CCR6 regulates epidermal trafficking of γδ T cell subsets in skin and suggest the potential of CCR6 as a therapeutic target for psoriasis.
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