The initial phase of an immune response functions to activate regulatory T cells.

The initial phase of an immune response functions to activate regulatory T cells.
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DOI:
10.4049/jimmunol.0900691
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发表时间:
2009-07-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Abbas AK
Abbas AK
中科院分区:
其他
文献类型:
--
作者:
O'Gorman WE;Dooms H;Thorne SH;Kuswanto WF;Simonds EF;Krutzik PO;Nolan GP;Abbas AK

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CD4+ T淋巴细胞对抗原的早期反应是产生细胞因子,特别是IL-2。为了检测细胞因子依赖性反应,在体内刺激原始抗原特异性T细胞,并使用磷酸化STAT5分子的存在来鉴定响应IL-2的细胞群。在T细胞启动数小时内,il -2依赖性STAT5磷酸化主要发生在Foxp3+调节性T细胞中。相比之下,抗原特异性T细胞只有在多次抗原暴露或记忆分化后才能接收到STAT5信号。接受IL-2信号的调节性T细胞增殖并发展出增强的抑制活性。这些结果表明,T细胞应答的最早事件之一是内源性调节细胞的激活,可能会阻止自身免疫。
An early reaction of CD4+ T lymphocytes to antigen is the production of cytokines, notably IL-2. In order to detect cytokine dependent responses, naive antigen-specific T cells were stimulated in vivo and the presence of phosphorylated STAT5 molecules was used to identify the cell populations responding to IL-2. Within hours of T-cell priming, IL-2-dependent STAT5 phosphorylation occurred primarily in Foxp3+ regulatory T cells. In contrast, the antigen-specific T cells received STAT5 signals only after repeated antigen exposure or memory differentiation. Regulatory T cells receiving IL-2 signals proliferated and developed enhanced suppressive activity. These results indicate that one of the earliest events in a T cell response is the activation of endogenous regulatory cells, potentially to prevent autoimmunity.
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