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Regulation of Protective and Pathogenic Th17 Responses

机译:调节性和致病性Th17反应

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The recent description of a T helper lymphocyte subset (Th17) that is characterized by the production of IL-17, TNF-α , IL-6, IL-22, and GM-CSF has substantially influenced current concepts of the pathogenesis of inflammatory diseases such as arthritis or encephalitis. Contrasting with the prevailing dogma that held IFN-γ producing Th1 cells responsible for the pathogenesis of most organ-specific autoimmune diseases it had been noted for some time that IFN-γ-/- mice were more susceptible to arthritis and encephalitis than their wild-type, littermates and that IL-12 was dispensable for disease induction. Recently it has become clear, that Th17 cells are of central importance for the pathogenesis of inflammatory diseases. The differentiation of naive Th cells into Th17 is triggered by antigen recognition in the presence of both IL-6 and TGF-β . IL-23, a heterodimeric cytokine which shares the p40 chain with IL-12 is an important survival factor for Th17 whereas IL-27, another member of the IL-12 family strongly inhibits Th17 production. Here we review the protective and pathogenic functions of Th17 in host defense and inflammatory diseases.
机译:以IL-17,TNF-α,IL-6,IL-22和GM-CSF产生为特征的T辅助淋巴细胞亚群(Th17)的最新描述已在很大程度上影响了炎症性疾病发病机理的最新概念例如关节炎或脑炎。与盛行导致大多数器官特异性自身免疫性疾病发病机理的产生IFN-γ的Th1细胞的流行教条相反,人们注意到一段时间以来,IFN-γ-/-小鼠比野生型小鼠更易患关节炎和脑炎。类型,同窝仔和IL-12对于疾病诱导是可有可无的。最近已经清楚,Th17细胞对于炎性疾病的发病机理至关重要。在IL-6和TGF-β均存在的情况下,抗原识别可触发幼稚Th细胞向Th17的分化。与IL-12共享p40链的异二聚体细胞因子IL-23是Th17的重要生存因子,而IL-12家族的另一个成员IL-27则强烈抑制Th17的产生。在这里,我们回顾了Th17在宿主防御和炎症性疾病中的保护和致病功能。

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