抑制ERK信号传递促进了人体胚胎囊中的多能性表皮质
Claire S Simon1,2, Afshan McCarthy2, Laura Woods1
1Loke Centre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, CB2 3EG, UK.
Nature communications
|July 28, 2025
概括
纤维细胞生长因子 (FGF) 和细胞外信号调节激酶 (ERK) 途径调节人类早期发育. 抑制ERK信号传递促进表皮质细胞扩张,这对于产生人类多能干细胞至关重要.
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
- 分子胚胎学分子胚胎学
背景情况:
- 早期人类胚胎发育和血统规范机制的理解尚不完全.
- 在小鼠中的研究突出了纤维细胞生长因子 (FGF) 和细胞外信号调节激酶 (ERK) 在植入前发育中的作用.
- 内细胞质量 (ICM) 细胞分化为表细胞和下细胞系,对随后的胚胎和胚胎外发育至关重要.
研究的目的:
- 阐明在人类发育过程中控制内细胞质量 (ICM) 规范的分子机制.
- 调查FGF和ERK信号传导在从人类ICM细胞中区分表皮质细胞和低细胞细胞系中的作用.
- 确定控制表皮质细胞扩张的信号通路,以潜在地衍生出人类多能干细胞.
主要方法:
- 在体外培养人类多能干细胞.
- 使用外源刺激和特定抑制剂操纵FGF和ERK信号通路.
- 对细胞系标记物和基因表达特征的分析.
- 单细胞转录组分析以评估细胞异质性和分子状态.
主要成果:
- 外源性FGF刺激促进了低质细胞特异化,而牺牲了表质细胞命运.
- 特定的ERK活性抑制导致了表皮质细胞的扩张.
- 单细胞转录组学显示,ERK抑制的表皮质细胞降低了FGF信号的调节,并维持了表皮质标记物.
- 这些表皮质细胞能够产生原始的人类多能干细胞.
结论:
- 在人类ICM规范过程中,表细胞和低细胞系的分离取决于ERK信号传递.
- 抑制ERK通路提供了一种扩展表皮质细胞的方法,促进了人类多能干细胞的衍生.
- 这项研究阐明了管理早期人类血统决策的关键分子机制.
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