ESRP2-microRNA-122轴指导出生后发生的肝脏多化和成熟的过程
bioRxiv : the preprint server for biology
|July 19, 2024
概括
产后激活表皮分裂调节蛋白2 (ESRP2) 促进肝细胞成熟. ESRP2刺激microRNA-122 (miR-122) 的产生,驱动肝细胞多倍化和肝功能.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 肝细胞多重积分和成熟对于特殊的肝功能至关重要.
- 影响肝脏多化因素的时间合作以及后转录机制的作用仍然不清楚.
研究的目的:
- 阐明控制产后肝细胞多化和成熟的监管层次.
- 研究表皮分裂调节蛋白2 (ESRP2) 和microRNA-122 (miR-122) 在肝细胞发育中的作用.
主要方法:
- 在体内对整个转录组的蛋白质-RNA相互作用分析.
- 单细胞和大量肝细胞RNA测序数据的整合.
- 使用构成性和诱导性ESRP2功能增减的小鼠模型与miR-122救援实验.
主要成果:
- 确定了一个监管层次结构,其中产后ESRP2激活促进了miR-122的生物发生.
- ESRP2直接结合了主要的miR-122宿主基因转录,增强了它的处理.
- 定时ESRP2激活增强了miR-122驱动的细胞动力学失败,确保了适当的肝细胞多质化.
结论:
- 通过miR-122.2,ESRP2作为肝细胞成熟和多化的一个关键调节剂.
- ESRP2调节一个RNA处理程序,以促进从胎儿转录异型到成年转录异型的过渡.
- 这项研究揭示了在肝脏发育过程中整合拼接调节和microRNA生物发生的新机制.
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