Cutting edge: Human regulatory T cells require IL-35 to mediate suppression and infectious tolerance.

Cutting edge: Human regulatory T cells require IL-35 to mediate suppression and infectious tolerance.
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DOI:
10.4049/jimmunol.1100315
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发表时间:
2011-06-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Vignali DA
Vignali DA
中科院分区:
其他
文献类型:
--
作者:
Chaturvedi V;Collison LW;Guy CS;Workman CJ;Vignali DA

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人类调节性T细胞(TCRs)对于维持免疫耐受是必不可少的。然而,它们用于介导抑制的机制仍然存在争议。虽然IL-35已被证明在小鼠Treg介导的抑制中发挥重要作用,但最近的研究质疑其在人类Treg中的相关性。在这里,我们表明,人类TcR表达和需要IL-35的最大抑制能力。与Tconv相比,在活化的人Tconv中观察到EBI 3和IL 12 A的显著上调,但未观察到IL 10和TGFB。接触非依赖性Treg介导的抑制是IL-35依赖性的,不需要IL-10或TGF-β。最后,人Treg介导的抑制导致抑制的Tconv以IL-35依赖性方式转化为iTr 35细胞,IL-35诱导的iTreg群体。因此,IL-35有助于人Treg介导的抑制,并且其将抑制的靶Tconv转化为iTr 35细胞可能有助于感染耐受。
Human regulatory T cells (Tregs) are essential for the maintenance of immune tolerance. However, the mechanisms they use to mediate suppression remain controversial. Although IL-35 has been shown to play an important role in Treg-mediated suppression in mice, recent studies have questioned its relevance in human Tregs. Here we show that human Tregs express and require IL-35 for maximal suppressive capacity. Substantial up-regulation of EBI3 and IL12A, but not IL10 and TGFB was observed in activated human Tregs compared with Tconv. Contact-independent Treg-mediated suppression was IL-35 dependent and did not require IL-10 or TGF-β. Lastly, human Treg-mediated suppression led to the conversion of the suppressed Tconv into iTr35 cells, IL-35 induced iTreg population, in an IL-35-dependent manner. Thus, IL-35 contributes to human Treg-mediated suppression, and its conversion of suppressed target Tconv into iTr35 cells may contribute to infectious tolerance.
人CD25(+)CD4(+)T调节细胞抑制幼稚和记忆T细胞增殖,可以在体外扩展而不会失去功能。
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