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人类原始多能性与预激发多能性的翻译及翻译后调控。

Translational and post-translational control of human naïve versus primed pluripotency.

作者信息

Chen Cheng, Zhang Xiaobing, Wang Yisha, Chen Xinyu, Chen Wenjie, Dan Songsong, She Shiqi, Hu Weiwei, Dai Jie, Hu Jianwen, Cao Qingyi, Liu Qianyu, Huang Yinghua, Qin Baoming, Kang Bo, Wang Ying-Jie

机构信息

State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, China.

Shaoxing People's Hospital, Shaoxing Hospital, Zhejiang University School of Medicine, Shaoxing, Zhejiang 312000, China.

出版信息

iScience. 2021 Dec 17;25(1):103645. doi: 10.1016/j.isci.2021.103645. eCollection 2022 Jan 21.

Abstract

Deciphering the regulatory network for human naive and primed pluripotency is of fundamental theoretical and applicable significance. Here, by combining quantitative proteomics, phosphoproteomics, and acetylproteomics analyses, we revealed RNA processing and translation as the most differentially regulated processes between naive and primed human embryonic stem cells (hESCs). Although glycolytic primed hESCs rely predominantly on the eukaryotic initiation factor 4E (eIF4E)-mediated cap-dependent pathway for protein translation, naive hESCs with reduced mammalian target of rapamycin complex (mTORC1) activity are more tolerant to eIF4E inhibition, and their bivalent metabolism allows for translating selective mRNAs via both eIF4E-dependent and eIF4E-independent/eIF4A2-dependent pathways to form a more compact naive proteome. Globally up-regulated proteostasis and down-regulated post-translational modifications help to further refine the naive proteome that is compatible with the more rapid cycling of naive hESCs, where CDK1 plays an indispensable coordinative role. These findings may assist in better understanding the unrestricted lineage potential of naive hESCs and in further optimizing conditions for future clinical applications.

摘要

解析人类原始态和启动态多能性的调控网络具有重要的理论和应用意义。在此,通过结合定量蛋白质组学、磷酸化蛋白质组学和乙酰化蛋白质组学分析,我们揭示了RNA加工和翻译是原始态和启动态人类胚胎干细胞(hESC)之间差异最显著的调控过程。虽然糖酵解启动态hESC主要依赖真核起始因子4E(eIF4E)介导的帽依赖性途径进行蛋白质翻译,但雷帕霉素复合物(mTORC1)活性降低的原始态hESC对eIF4E抑制更具耐受性,其二价代谢允许通过eIF4E依赖性和eIF4E非依赖性/eIF4A2依赖性途径翻译选择性mRNA,以形成更紧凑的原始态蛋白质组。整体上调的蛋白质稳态和下调的翻译后修饰有助于进一步优化与原始态hESC更快细胞周期相适应的原始态蛋白质组,其中细胞周期蛋白依赖性激酶1(CDK1)发挥不可或缺的协调作用。这些发现可能有助于更好地理解原始态hESC不受限制的谱系潜能,并进一步优化未来临床应用的条件。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a059/8718978/6d375f87980a/fx1.jpg

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