腔腔振荡驱动早期哺乳动物胚胎的模式形成
Zheng Guo1, Jie Yao1, Xu Zheng2
1Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
Cell reports
|February 22, 2025
概括
早期的小鼠胚胎发育涉及到物理力量. 胚胎细胞腔的振荡驱动细胞命运的变化,指导原始内皮和表皮质前体运动,以形成适当的胚胎模式.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 内细胞质量 (ICM) 分离为表皮质 (EPI) 和原始内皮层 (PrE) 是哺乳动物胚胎发育的关键早期阶段.
- 控制ICM内细胞命运的这种空间模式的精确机制仍然不完全理解.
研究的目的:
- 调查物理力,特别是囊胚腔振荡在驱动小鼠胚胎发育过程中的EPI/PrE分离中的作用.
- 阐明这些物理振荡如何影响细胞行为和命运决定.
主要方法:
- 在小鼠早期胚胎发生过程中观察胚囊腔动态.
- 分析ICM细胞行为,包括细胞-细胞接触波动和细胞流动模式.
- 评估基因表达 (PDGFRα) 和蛋白质定位 (YAP) 响应腔振荡.
主要成果:
- 囊胞腔表现出周期性振荡 (快速收缩,缓慢膨胀),与EPI/PrE分离相吻合.
- 腔腔振荡会在ICM中诱导类似流体的状态,增强细胞接触波动.
- 振荡驱动融合的细胞流,将PrE前体指向ICM-光层接口,EPI前体指向 trofhectoderm.
- 由于空腔振荡,PrE前体的PDGFRα表达和YAP核积累增加.
结论:
- 囊胚腔的物理振荡是早期哺乳动物胚胎模式形成的基本驱动因素.
- 胚胎囊腔振荡通过调节ICM机制和指导细胞运动来协调细胞命运分离.
- 这项研究强调了胚胎发育中的物理力量和细胞内在机制之间的相互作用.
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