Gadd45a opens up the promoter regions of miR-295 facilitating pluripotency induction.

Gadd45a opens up the promoter regions of miR-295 facilitating pluripotency induction.
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Gadd45a 打开 miR-295 的启动子区域,促进多能性诱导。

DOI:
10.1038/cddis.2017.497
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发表时间:
2017-10-12
影响因子:
9
通讯作者:
Liu X
Liu X
中科院分区:
生物学1区
文献类型:
--
作者:
Li L;Chen K;Wu Y;Long Q;Zhao D;Ma B;Pei D;Liu X

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MicroRNAs (miRNAs)通过控制多能网络在多能状态的建立中起着至关重要的作用。然而,在体细胞重编程过程中控制mirna的分子机制仍然不清楚。在这项研究中,我们发现Gadd45a(生长阻滞和dna损伤诱导蛋白45a)通过激活miR-295来增强重编程。此外,我们发现Gadd45a结合miR-295的启动子区域。核酸酶接近性分析表明,Gadd45a打开了miR-295的启动子区域。miR-295启动子区域的H3K9Ac和H3K27Ac水平也升高。总之,我们的研究结果表明,Gadd45a放松miR-295的启动子区域,并在重编程过程中促进miR-295的表达,这意味着Gadd45a和miR-290集群合作决定细胞命运的简明机制。
MicroRNAs (miRNAs) play crucial roles in the establishment of pluripotent state by controlling pluripotent network. However, the molecular mechanisms controlling miRNAs during somatic cell reprogramming remain obscure. In this study, we show Gadd45a (growth arrest and DNA-damage-inducible protein 45a) enhances reprogramming by activating miR-295. Furthermore, we show that Gadd45a binds the promoter regions of miR-295. Nuclease accessibility assay indicates that Gadd45a opens the promoter regions of miR-295. Levels of H3K9Ac and H3K27Ac on the promoter regions of miR-295 were also increased. In conclusion, our results indicate that Gadd45a relaxes the promoter regions of miR-295 and promotes the expression of miR-295 during reprogramming, implying a concise mechanism of Gadd45a and miR-290 cluster cooperation in cell-fate determination.
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