Physiologic control of the functional status of Foxp3+ regulatory T cells.

Physiologic control of the functional status of Foxp3+ regulatory T cells.
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DOI:
10.4049/jimmunol.1002937
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发表时间:
2011-04-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Munn DH
Munn DH
中科院分区:
其他
文献类型:
--
作者:
Mellor AL;Munn DH

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调节性Foxp 3谱系CD 4 T细胞(Tcells)因其维持自身耐受性和抑制T细胞免疫的能力而命名。然而,来自非炎症组织的静息TCLs表现出很少的抑制活性,并且必须被刺激才能获得这种功能。相反,在某些炎性条件下,TGFs可能经历快速重编程以获得辅助/效应子功能。在这篇简短的综述中,我们描述了最近的进展,阐明控制Foxp 3-lineage T细胞功能状态的生理过程。新出现的证据表明,令人惊讶的可能性是,重编程的T细胞可以是在某些生理环境中的辅助活性的不可或缺的来源,如引发CD 8 + T细胞反应。这表明了一种新的范例,其中Foxp 3 + T细胞固有地具有双功能潜力,在局部炎症部位充当“第一应答者”细胞的预形成池,其可以提供经典的调节/抑制活性,或快速重新编程以提供辅助/效应活性,取决于在局部生理环境中表现的信号。
Regulatory Foxp3-lineage CD4 T cells (Tregs) were named for their ability to maintain self tolerance and suppress T cell immunity. However, resting Tregs from non-inflamed tissues exhibit little suppressor activity, and must be stimulated to acquire such function. Conversely, under certain inflammatory conditions Tregs may undergo rapid re-programming to acquire helper/effector functions. In this Brief Review, we describe recent progress in elucidating physiologic processes that control the functional status of Foxp3-lineage Tregs. Emerging evidence suggests the surprising possibility that re-programmed Tregs can be an indispensable source of helper activity in some physiologic settings, such as priming CD8+ T cell responses. This suggests a novel paradigm in which Foxp3+ Tregs intrinsically possess bifunctional potential, acting as a pre-formed pool of ‘first responder’ cells at sites of local inflammation that can provide either classical regulatory/suppressor activity, or rapidly re-program to supply helper/effector activity, contingent on signals that manifest in local physiologic settings.
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