作为控制人类胚胎干细胞命运的机械反应增强元件的可转移元件子集
Tongyu Sun1,2,3, Yueyuan Xu1,2,3, Nicole Angel4
1Department of Cell Biology, Duke University Medical Center, Durham, NC, USA.
Nature cell biology
|September 17, 2025
概括
可转移元件 (TE) 响应机械信号,作为机械响应增强元件 (MREE),控制人类胚胎干细胞命运和基因表达. 这揭示了TE在细胞发育和疾病中的新作用.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 干细胞生物学 干细胞生物学
背景情况:
- 可移植元素 (TE) 占人类基因组的一半,对发育和疾病至关重要.
- 虽然已知TEs的内在细胞调节,但它们对外部机械线索的反应尚未被探索.
研究的目的:
- 研究微环境中的机械信号如何影响人类胚胎干细胞中的可转移元素活性.
- 阐明TEs,特别是LTR7元素作为机械反应增强元件 (MREE) 的机制.
主要方法:
- 对转录组,表观遗传和3D基因组组织变化的分析,以响应矩阵机械线索.
- 研究YAP/TEAD1,BRD4和CTCF在调解TE对机械刺激的反应中的作用.
- 功能性测试,以确定机械反应性TE对基因表达和细胞命运的影响.
主要成果:
- 矩阵机械线索诱导各种TE家族的显著转录组,表观遗传和3D基因组改变,包括LTR7.7.
- LTR7元素作为MREEs起作用,调节人类胚胎干细胞中的基因表达和细胞命运.
- YAP/TEAD1复合体与BRD4相互作用以调节LTR7表观遗传活性,YAP招募CTCF以建立TE和基因促进体之间的长距离相互作用.
- 一个特定的LTR7元素作为FAM189A2的远端增强剂,抑制了最终的内皮分化.
结论:
- 可转移元素作为关键的MREE,集成机械信号来控制人类胚胎干细胞中的基因表达和细胞命运.
- 这些发现揭示了细胞微环境通过TEs影响基因组调节的新机制.
- 这项研究突出了TE在发育和疾病中被低估的作用,这种作用是由机械线索介导的.
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