Foxp3 interacts with c-Rel to mediate NF-κB repression.

Foxp3 interacts with c-Rel to mediate NF-κB repression.
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DOI:
10.1371/journal.pone.0018670
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发表时间:
2011-04-07
期刊:
影响因子:
3.7
通讯作者:
Betz AG
Betz AG
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Loizou L;Andersen KG;Betz AG

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谱系特异性dna结合因子Foxp3的表达控制着自然发生的调节性T细胞的发育和功能。Foxp3已被证明与多种转录调节因子相互作用,包括NFAT、NF-κB (p65)、Runx1和RORγt,以及组蛋白修饰酶TIP60、HDAC7和HDAC9。这些相互作用的总和被认为导致了调节性T细胞转录程序的变化。本研究表明Foxp3直接或作为多聚复合物的一部分与NF-κB组分c-Rel结合。我们证明了Foxp3的n端区域是c-Rel结合所必需的,而不是NFAT的结合。相反,叉头结构域的删除会导致与NFAT的相互作用丧失,但c-Rel不会。我们的研究结果特别有趣,因为c-Rel对于胸腺发育过程中调节性T细胞中Foxp3的诱导至关重要,但在成熟的调节性T细胞中必须被抑制以维持其抑制性表型。
Expression of the lineage-specific DNA-binding factor Foxp3 controls the development and function of naturally occurring regulatory T cells. Foxp3 has been shown to interact with a multitude of transcriptional regulators including NFAT, NF-κB (p65), Runx1 and RORγt, as well as the histone modification enzymes TIP60, HDAC7 and HDAC9. The sum of these interactions is believed to cause the change in the transcriptional program of regulatory T cells. Here we show that Foxp3 directly or as part of a multimeric complex engages with the NF-κB component c-Rel. We demonstrate that the N-terminal region of Foxp3 is required for the binding of c-Rel, but not NFAT. Conversely, deletion of the forkhead domain causes a loss of interaction with NFAT, but not c-Rel. Our findings are of particular interest, as c-Rel is crucial for the induction of Foxp3 in regulatory T cells during thymic development, but has to be repressed in mature regulatory T cells to maintain their suppressive phenotype.
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