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Study on the pathogenesis of psoriasis induced by Streptococcus hemolyticus
Author(s): 
Pages: 20-21
Year: Issue:  1
Journal: JOURNAL OF CLINICAL DERMATOLOGY

Keyword:  链球菌溶血性超抗原银屑病凋亡Fas抗原;
Abstract: 探讨β-溶血性链球菌诱发银屑病的机制.采用3H-TdR掺入法测定细胞增殖反应,AnnexinV法测定细胞凋亡,流式细胞仪检测细胞表面抗原表达.结果显示β-溶血性链球菌(SP)刺激淋巴细胞活化增殖,经SP活化的淋巴细胞培养上清液作用于角质形成细胞48h,可促进角质形成细胞增殖,诱导角质形成细胞表达HLA-DR和Fas抗原;再次加入上清液继续作用48h,则诱导角质形成细胞凋亡.SP作为超抗原首先活化T细胞,使之释放细胞因子,后者使角质形成细胞活化增殖,表达HLA-DR和Fas抗原,继而诱导细胞凋亡,此过程可能是银屑病的主要发病机制之一.
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