Dicer-dependent microRNA pathway safeguards regulatory T cell function.

Dicer-dependent microRNA pathway safeguards regulatory T cell function.
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DICER依赖性microRNA途径保障调节T细胞功能。

DOI:
10.1084/jem.20081062
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发表时间:
2008-09-01
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Rudensky AY
Rudensky AY
中科院分区:
其他
文献类型:
--
作者:
Liston A;Lu LF;O'Carroll D;Tarakhovsky A;Rudensky AY

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调节性 T (T reg) 细胞对于预防自身免疫至关重要。发挥这一作用的是 T reg 细胞在炎症条件下发挥其抑制功能的能力。我们发现 T reg 细胞介导的耐受性严重依赖于 Dicer 控制的 microRNA (miRNA) 途径。 T reg 细胞谱系中 miRNA 的耗尽导致致命的自身免疫,这与 T reg 细胞缺陷小鼠的情况没有什么区别。在所有 T 细胞中缺乏 Dicer 或同时含有 Dicer 缺陷和充足 T reg 细胞的无病小鼠中,Dicer 缺陷 T reg 细胞具有抑制性,尽管程度较轻,而与 Dicer 充足的对应细胞相比,它们的稳态潜力减弱。然而,在患病小鼠中,缺乏 Dicer 的 T reg 细胞完全丧失了抑制能力。因此,miRNA 在炎症条件下保留 T reg 细胞的功能程序。
Regulatory T (T reg) cells are indispensable for preventing autoimmunity. Incumbent to this role is the ability of T reg cells to exert their suppressor function under inflammatory conditions. We found that T reg cell–mediated tolerance is critically dependent on the Dicer-controlled microRNA (miRNA) pathway. Depletion of miRNA within the T reg cell lineage resulted in fatal autoimmunity indistinguishable from that in T reg cell–deficient mice. In disease-free mice lacking Dicer in all T cells or harboring both Dicer-deficient and -sufficient T reg cells, Dicer-deficient T reg cells were suppressive, albeit to a lesser degree, whereas their homeostatic potential was diminished as compared with their Dicer-sufficient counterparts. However, in diseased mice, Dicer-deficient T reg cells completely lost suppressor capacity. Thus, miRNA preserve the T reg cell functional program under inflammatory conditions.
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