Infectious tolerance: human CD25(+) regulatory T cells convey suppressor activity to conventional CD4(+) T helper cells.

Infectious tolerance: human CD25(+) regulatory T cells convey suppressor activity to conventional CD4(+) T helper cells.
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DOI:
10.1084/jem.20020394
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发表时间:
2002-07-15
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Enk AH
Enk AH
中科院分区:
其他
文献类型:
--
作者:
Jonuleit H;Schmitt E;Kakirman H;Stassen M;Knop J;Enk AH

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调节性CD4⁺CD25⁺T细胞(Treg)对于维持免疫自身耐受是必不可少的。我们证明人CD25⁺Treg细胞通过细胞 - 细胞接触介导的对常规CD4⁺T细胞的抑制作用是抗固定的,不依赖于膜结合型转化生长因子 - β(TGF - β),但需要CD25⁺Treg细胞的活化和蛋白质合成。CD25⁺Treg细胞与去除Treg细胞的CD4⁺T细胞共同活化会导致CD4⁺T细胞无能,而这些无能的CD4⁺T细胞反过来又会抑制常规的、新鲜分离的CD4⁺T辅助(Th)细胞的活化。这种通过细胞接触从CD25⁺Treg细胞传递的传染性抑制活性是不依赖细胞接触的,并且部分由可溶性转化生长因子(TGF) - β介导。在常规CD4⁺Th细胞中诱导抑制特性代表了传染性耐受现象背后的一种机制。这解释了先前发表的关于TGF - β在CD25⁺Treg细胞诱导的免疫抑制中作用的相互矛盾的数据。
Regulatory CD4+CD25+ T cells (Treg) are mandatory for maintaining immunologic self-tolerance. We demonstrate that the cell-cell contact–mediated suppression of conventional CD4+ T cells by human CD25+ Treg cells is fixation resistant, independent from membrane-bound TGF-β but requires activation and protein synthesis of CD25+ Treg cells. Coactivation of CD25+ Treg cells with Treg cell–depleted CD4+ T cells results in anergized CD4+ T cells that in turn inhibit the activation of conventional, freshly isolated CD4+ T helper (Th) cells. This infectious suppressive activity, transferred from CD25+ Treg cells via cell contact, is cell contact–independent and partially mediated by soluble transforming growth factor (TGF)-β. The induction of suppressive properties in conventional CD4+ Th cells represents a mechanism underlying the phenomenon of infectious tolerance. This explains previously published conflicting data on the role of TGF-β in CD25+ Treg cell–induced immunosuppression.
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发表时间: 2001-06-04
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影响因子: --
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