Naive pluripotency is associated with global DNA hypomethylation.

Naive pluripotency is associated with global DNA hypomethylation.
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DOI:
10.1038/nsmb.2510
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发表时间:
2013-03
影响因子:
16.8
通讯作者:
Hajkova, Petra
Hajkova, Petra
中科院分区:
生物学1区
文献类型:
--
作者:
Leitch, Harry G.;McEwen, Kirsten R.;Turp, Aleksandra;Encheva, Vesela;Carroll, Tom;Grabole, Nils;Mansfield, William;Nashun, Buhe;Knezovich, Jaysen G.;Smith, Austin;Surani, M. Azim;Hajkova, Petra

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幼稚多能胚胎干细胞(ESCs)和胚胎生殖细胞(EGCs)分别来源于植入前的外胚层和原始生殖细胞(PGCs)。我们研究了ESCs和EGCs之间是否存在差异,鉴于其不同的发育起源。PGCs被编程为进行整体DNA去甲基化;然而,我们发现EGCs表现出与ESC相同的整体DNA甲基化水平。重要的是,通过2 i条件抑制MEK和Gsk 3b导致两种细胞类型中DNA甲基化的显著降低。这是由Prdm 14驱动的,并与Dnmt 3a和Dnmt 3b的下调有关。然而,基因组印记保持在2 i和我们报告的衍生EGCs与完整的基因组印记。总的来说,我们的研究结果表明,在2 i培养灌输一个天真的多能状态,具有独特的表观遗传配置,平行于在植入前上胚层和新生PGCs中观察到的分子特征。
Naïve pluripotent embryonic stem (ESCs) cells and embryonic germ (EGCs) cells are derived from the preimplantation epiblast and primordial germ cells (PGCs), respectively. We investigated whether differences exist between ESCs and EGCs in view of their distinct developmental origins. PGCs are programmed to undergo global DNA demethylation; however we find that EGCs exhibit equivalent levels of global DNA methylation to ESCs. Importantly, inhibition of MEK and Gsk3b by 2i conditions leads to a pronounced reduction in DNA methylation in both cell types. This is driven by Prdm14 and is associated with downregulation of Dnmt3a and Dnmt3b. However, genomic imprints are maintained in 2i and we report derivation of EGCs with intact genomic imprints. Collectively, our findings establish that culture in 2i instils a naïve pluripotent state with a distinctive epigenetic configuration that parallels molecular features observed in both the preimplantation epiblast and nascent PGCs.
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