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Staphylococcus aureus Epicutaneous Exposure Drives Skin Inflammation via IL-36-Mediated T Cell Responses.
Cell Host & Microbe ( IF 20.6 ) Pub Date : 2017-11-08 , DOI: 10.1016/j.chom.2017.10.006
Haiyun Liu 1 , Nathan K Archer 1 , Carly A Dillen 1 , Yu Wang 1 , Alyssa G Ashbaugh 1 , Roger V Ortines 1 , Tracy Kao 1 , Steven K Lee 1 , Shuting S Cai 1 , Robert J Miller 1 , Mark C Marchitto 1 , Emily Zhang 1 , Daniel P Riggins 2 , Roger D Plaut 2 , Scott Stibitz 2 , Raif S Geha 3 , Lloyd S Miller 4
Affiliation  

Staphylococcus aureus colonization contributes to skin inflammation in diseases such as atopic dermatitis, but the signaling pathways involved are unclear. Herein, epicutaneous S. aureus exposure to mouse skin promoted MyD88-dependent skin inflammation initiated by IL-36, but not IL-1α/β, IL-18, or IL-33. By contrast, an intradermal S. aureus challenge promoted MyD88-dependent host defense initiated by IL-1β rather than IL-36, suggesting that different IL-1 cytokines trigger MyD88 signaling depending on the anatomical depth of S. aureus cutaneous exposure. The bacterial virulence factor PSMα, but not α-toxin or δ-toxin, contributed to the skin inflammation, which was driven by IL-17-producing γδ and CD4+ T cells via direct IL-36R signaling in the T cells. Finally, adoptive transfer of IL-36R-expressing T cells to IL-36R-deficient mice was sufficient for mediating S. aureus-induced skin inflammation. Together, this study defines a previously unknown pathway by which S. aureus epicutaneous exposure promotes skin inflammation involving IL-36R/MyD88-dependent IL-17 T cell responses.

中文翻译:

金黄色葡萄球菌表皮暴露通过 IL-36 介导的 T 细胞反应驱动皮肤炎症。

金黄色葡萄球菌定植会导致特应性皮炎等疾病的皮肤炎症,但所涉及的信号通路尚不清楚。在此,表皮金黄色葡萄球菌暴露于小鼠皮肤会促进由 IL-36 引发的 MyD88 依赖性皮肤炎症,但不会促进 IL-1α/β、IL-18 或 IL-33。相比之下,皮内金黄色葡萄球菌挑战促进了由 IL-1β 而不是 IL-36 引发的 MyD88 依赖性宿主防御,这表明不同的 IL-1 细胞因子触发 MyD88 信号传导取决于金黄色葡萄球菌皮肤暴露的解剖深度。细菌毒力因子 PSMα,而不是 α-毒素或 δ-毒素,促成了皮肤炎症,这是由产生 IL-17 的 γδ 和 CD4+ T 细胞通过 T 细胞中的直接 IL-36R 信号传导驱动的。最后,将表达 IL-36R 的 T 细胞过继转移至 IL-36R 缺陷小鼠足以介导金黄色葡萄球菌诱导的皮肤炎症。总之,这项研究定义了一个以前未知的途径,金黄色葡萄球菌表皮暴露通过该途径促进涉及 IL-36R/MyD88 依赖性 IL-17 T 细胞反应的皮肤炎症。
更新日期:2017-11-08
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