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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A variable immunoreceptor in a subpopulation of human neutrophils
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A variable immunoreceptor in a subpopulation of human neutrophils

机译:人类嗜中性粒细胞亚群中的可变免疫受体

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摘要

Neutrophils are thought to rely solely on nonspecific immune mechanisms. Here we provide molecular biological, immunologi-cal, ultrastructural, and functional evidence for the presence of a T cell receptor (TCR)-based variable immunoreceptor in a 5-8% subpopulation of human neutrophils. We demonstrate that these peripheral blood neutrophils express variable and individual-specific TCRαβ repertoires and the RAG1/RAG2 recombinase complex. The proinflammatory cytokine granulocyte colony-stimulating factor regulates expression of the neutrophil immunoreceptor and RAG1/RAG2 in vivo. Specific engagement of the neutrophil TCR complex protects from apoptosis and stimulates secretion of the neutrophil-activating chemokine IL-8. Our results, which also demonstrate the presence of the TCR in murine neutrophils, suggest the coexistence of a variable and an innate host defense system in mammalian neutrophils.
机译:中性粒细胞被认为仅依赖于非特异性免疫机制。在这里,我们提供了分子生物学,免疫学,超微结构和功能性证据,表明在人类嗜中性粒细胞的5-8%亚群中存在基于T细胞受体(TCR)的可变免疫受体。我们证明,这些外周血中性粒细胞表达可变的和个体特异性的TCRαβ库和RAG1 / RAG2重组酶复合物。促炎细胞因子粒细胞集落刺激因子在体内调节中性粒细胞免疫受体和RAG1 / RAG2的表达。中性粒细胞TCR复合物的特异性结合可防止细胞凋亡并刺激中性粒细胞活化趋化因子IL-8的分泌。我们的结果也证明了TCR在鼠中性粒细胞中的存在,表明在哺乳动物中性粒细胞中变量和先天宿主防御系统并存。

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