Long non-coding RNA GAS5 controls human embryonic stem cell self-renewal by maintaining NODAL signalling.

Long non-coding RNA GAS5 controls human embryonic stem cell self-renewal by maintaining NODAL signalling.
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长非编码RNA GAS5通过维持NODAL信号传导控制人胚胎干细胞自我更新

DOI:
10.1038/ncomms13287
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发表时间:
2016-11-04
影响因子:
16.6
通讯作者:
Liu, Houqi
Liu, Houqi
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Xu, Chen;Zhang, Yan;Wang, Qiaoling;Xu, Zhenyu;Jiang, Junfeng;Gao, Yuping;Gao, Minzhi;Kang, Jiuhong;Wu, Minjuan;Xiong, Jun;Ji, Kaihong;Yuan, Wen;Wang, Yue;Liu, Houqi

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长链非编码rna (lncrna)在人类胚胎干细胞(hESCs)自我更新的调控回路中发挥着重要作用。然而,大多数hesc特异性lncrna仍未被表征。在这里,我们证明了生长停滞特异性转录本5 (GAS5),一种已知的肿瘤抑制因子和生长停滞相关的lncRNA,在hESCs中被高表达并直接受到多能因子OCT4和SOX2的调控。表型分析显示,GAS5敲低显著损害hESC自我更新,而其过表达显著促进hESC自我更新。通过RNA测序和功能分析,我们证明GAS5通过保护NODAL表达免受mirna介导的降解来维持NODAL信号传导。因此,我们提出上述多能性因子、GAS5和NODAL形成一个前馈信号回路,维持hESC自我更新。由于GAS5的这种调节功能是干细胞特异性的,我们的研究结果还表明,由于竞争的内源性机制,lncRNAs的功能可能在不同的细胞类型中有所不同。已知长链非编码rna (lncRNA)调控人胚胎干细胞(hESC)的自我更新。在这里,作者发现lncRNA生长抑制特异性转录物5 (GAS5)通过调节NODAL信号来调节多能性,以维持hESCs的自我更新。
Long non-coding RNAs (lncRNAs) are known players in the regulatory circuitry of the self-renewal in human embryonic stem cells (hESCs). However, most hESC-specific lncRNAs remain uncharacterized. Here we demonstrate that growth-arrest-specific transcript 5 (GAS5), a known tumour suppressor and growth arrest-related lncRNA, is highly expressed and directly regulated by pluripotency factors OCT4 and SOX2 in hESCs. Phenotypic analysis shows that GAS5 knockdown significantly impairs hESC self-renewal, but its overexpression significantly promotes hESC self-renewal. Using RNA sequencing and functional analysis, we demonstrate that GAS5 maintains NODAL signalling by protecting NODAL expression from miRNA-mediated degradation. Therefore, we propose that the above pluripotency factors, GAS5 and NODAL form a feed-forward signalling loop that maintains hESC self-renewal. As this regulatory function of GAS5 is stem cell specific, our findings also indicate that the functions of lncRNAs may vary in different cell types due to competing endogenous mechanisms. Long non-coding RNAs (lncRNA) are known to regulate human embryonic stem cell (hESC) self-renewal. Here, the authors identify lncRNA growth-arrest-specific transcript 5 (GAS5) that regulates pluripotency via modulation of NODAL signalling to maintain self-renewal in hESCs.
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