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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Antigens in tea-beverage prime human Vγ2Vδ2 T cells in vitro and in vivo for memory and nonmemory antibacterial cytokine responses
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Antigens in tea-beverage prime human Vγ2Vδ2 T cells in vitro and in vivo for memory and nonmemory antibacterial cytokine responses

机译:茶饮料中主要的人Vγ2Vδ2T细胞中的抗原在体内和体外对记忆和非记忆性抗菌素的反应

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摘要

Human γδ T cells mediate innate immunity to microbes via T cell receptor-dependent recognition of unprocessed antigens with conserved molecular patterns. These nonpeptide alkylamine antigens are shared by tumor cells, bacteria, parasites, and fungi but also by edible plant products such as tea, apples, mushrooms, and wine. Here we show that priming of γδ T cells with alkylamine antigens in vitro results in a memory response to these antigens. Such priming results also in a nonmemory response to whole bacteria and to lipopolysaccharide, characterized by IL-12-depen-tfent secretion of IFN-γ by γδ T cells and by γδ T cell proliferation. Drinking tea, which contains L-theanine, a precursor of the nonpeptide antigen ethylamine, primed peripheral blood γδ T cells to mediate a memory response on reexposure to ethylamine and to secrete IFN-γ in response to bacteria. This unique combination of innate immune response and immunologic memory shows that γδ T cells can function as a bridge between innate and acquired immunity. In addition, these data provide an explanation for the health benefits of tea.
机译:人类γδT细胞通过T细胞受体依赖的未加工抗原的保守分子模式介导对微生物的先天免疫。这些非肽烷基胺抗原被肿瘤细胞,细菌,寄生虫和真菌所共有,但也被可食用植物产品(如茶,苹果,蘑菇和葡萄酒)所共有。在这里,我们显示在体外用烷基胺抗原引发γδT细胞会导致对这些抗原的记忆反应。这种引发还导致了对整个细菌和脂多糖的无记忆反应,其特征在于γδT细胞和γδT细胞增殖的IL-12依赖于IFN-γ的分泌。含有L-茶氨酸(非肽抗原乙胺的前体)的茶可灌注外周血γδT细胞,以介导再暴露于乙胺时的记忆反应,并响应细菌而分泌IFN-γ。先天免疫应答和免疫记忆的这种独特结合表明,γδT细胞可以充当先天免疫与后天免疫之间的桥梁。此外,这些数据为茶的健康益处提供了解释。

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