Pivotal role of dermal IL-17-producing γδ T cells in skin inflammation.

Pivotal role of dermal IL-17-producing γδ T cells in skin inflammation.
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DOI:
10.1016/j.immuni.2011.08.001
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发表时间:
2011-10-28
期刊:
影响因子:
32.4
通讯作者:
Yan J
Yan J
中科院分区:
医学1区
文献类型:
--
作者:
Cai Y;Shen X;Ding C;Qi C;Li K;Li X;Jala VR;Zhang HG;Wang T;Zheng J;Yan J

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白细胞介素(IL)-23和CD 4+辅助性T细胞-17(Th 17)被认为在银屑病的发展中至关重要。在这里,我们报告了IL-23主要刺激真皮γδT细胞产生IL-17,导致疾病进展。真皮γδT细胞组成性表达IL-23受体(IL-23 R)、RORγt和各种趋化因子受体。真皮γδT细胞产生IL-17不依赖于αβT细胞。在T细胞受体δ缺陷(Tcrd−/−)和IL-17受体缺陷(Il 17 ra −/−)小鼠中,IL-23诱导的表皮增生和炎症显著减少,但在Tcra−/−小鼠中正常发生。在Tcrd−/−小鼠中,咪喹莫特诱导的皮肤病理学也显著降低。可能进一步促进疾病进展,IL-23刺激真皮γδT细胞扩增。在银屑病患者中,γδT细胞在受影响的皮肤中也大大增加,并产生大量的IL-17。因此,IL-23应答性真皮γδ T细胞是皮肤中主要的IL-17产生者,并且可能代表治疗银屑病的新靶点。
Interleukin (IL)-23 and CD4+ T helper-17 (Th17) cells are thought to be critical in the development of psoriasis. Here, we report that IL-23 predominantly stimulated dermal γδT cells to produce IL-17 that led to disease progression. Dermal γδT cells constitutively expressed the IL-23 receptor (IL-23R), RORγt, and various chemokine receptors. IL-17 production from dermal γδT cells was independent of αβT cells. The epidermal hyperplasia and inflammation induced by IL-23 were significantly decreased in T cell receptor δ deficient (Tcrd−/−) and IL-17 receptor deficient (Il17ra−/−) mice but occurred normally in Tcra−/− mice. Imiquimod-induced skin pathology was also significantly decreased in Tcrd−/− mice. Perhaps further promoting disease progression, IL-23 stimulated dermal γδT cell expansion. In psoriasis patients, γδT cells were also greatly increased in affected skin and produced large amounts of IL-17. Thus, IL-23-responsive dermal γδ T cells are the major IL-17 producers in the skin and may represent a novel target for the treatment of psoriasis.
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