A role for Dicer in immune regulation.

A role for Dicer in immune regulation.
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DOI:
10.1084/jem.20061692
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发表时间:
2006-10-30
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Merkenschlager M
Merkenschlager M
中科院分区:
其他
文献类型:
--
作者:
Cobb BS;Hertweck A;Smith J;O'Connor E;Graf D;Cook T;Smale ST;Sakaguchi S;Livesey FJ;Fisher AG;Merkenschlager M

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微小RNA(miRNAs)在转录后水平调控基因表达。在此我们表明,调节性T(Treg)细胞具有不同于常规CD4 T细胞的微小RNA图谱。通过强制表达Foxp3以及令人惊讶的是通过激活常规CD4 T细胞,可赋予一种部分类似Treg细胞的微小RNA图谱。通过去除产生功能性微小RNA的RNA酶III——Dicer来消耗微小RNA,会减少Treg细胞数量并导致免疫病理。Dicer以细胞自主的方式促进胸腺中Treg细胞的发育以及转化生长因子β对Foxp3的高效诱导。这些结果表明,Treg细胞的发育涉及Dicer产生的RNA。
Micro RNAs (miRNAs) regulate gene expression at the posttranscriptional level. Here we show that regulatory T (T reg) cells have a miRNA profile distinct from conventional CD4 T cells. A partial T reg cell–like miRNA profile is conferred by the enforced expression of Foxp3 and, surprisingly, by the activation of conventional CD4 T cells. Depleting miRNAs by eliminating Dicer, the RNAse III enzyme that generates functional miRNAs, reduces T reg cell numbers and results in immune pathology. Dicer facilitates, in a cell-autonomous fashion, the development of T reg cells in the thymus and the efficient induction of Foxp3 by transforming growth factor β. These results suggest that T reg cell development involves Dicer-generated RNAs.
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