在mESCs的原始内皮分化的TBX3-GATA6电路的纳米介导控制
Hao Wu1, Ying Ye2, Hongxia Dai1
1Cam-Su Genomic Resource Center, Medical College of Soochow University, Suzhou, China.
EMBO reports
|February 2, 2026
概括
通过沉默原始内皮 (PrE) 基因,NANOG蛋白维持胚胎干细胞 (ESC) 的身份. 它阻止TBX3与GATA6合作,从而抑制PrE分化.
科学领域:
- 发展生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 胚胎发育早期的细胞命运决定是由复杂的转录网络控制的.
- NANOG是一种关键的转录因子,对维持多能性和指导表皮质原始内皮 (PrE) 命运选择至关重要.
- 纳诺基基因抑制活动的精确分子机制尚未完全阐明.
研究的目的:
- 调查NANOG维持胚胎干细胞 (ESC) 身份并抑制原始内皮 (PrE) 差异化的分子机制.
- 确定参与NANOG功能中的蛋白质合作伙伴和监管元素.
- 阐明控制多能性和血统承诺之间的平衡的监管轴.
主要方法:
- 同免疫沉测试以确定蛋白质相互作用.
- 染色体免疫沉测序 (ChIP-seq) 来映射增强剂活性和PRC2复合体结合.
- 定量PCR和西式斑点测试用于评估基因和蛋白质表达水平.
- 在ESC中进行功能测试,以评估基因扰动对细胞命运决定的影响.
主要成果:
- 纳诺与TBX3和多抑制综合体2 (PRC2) 合作,通过新型远端增强剂使PrE基因沉默,从而保持ESC身份.
- 丢失NANOG会导致减少PRC2-介导的GATA6抑制,并独立于TBX3.3启动其表达.
- 随后,TBX3的上调促进了其与GATA6的相互作用,激活了涉及GATA6,GATA4和SOX17的前循环,从而推动了PrE的分化.
结论:
- 通过直接抑制和阻止TBX3形成替代蛋白质复合体,NANOG抑制了PrE命运.
- 一个涉及NANOG,TBX3和GATA6的调控轴整合了增强剂控制,染色体修饰和转录因子动态.
- 这一轴对于在胚胎早期发育过程中将ESC维护与血统承诺相结合至关重要.
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