在哺乳动物胃流动过程中,细胞迁移和心脏命运决定的早期协调
Shayma Abukar1,2, Peter A Embacher3, Alessandro Ciccarelli4
1Developmental Biology and Cancer Department, Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK.
The EMBO journal
|May 13, 2025
概括
早期的小鼠胚胎发育显示出不同的心脏原生细胞迁移形成心脏. 研究人员跟踪了中皮细胞的移动,确定了左心室/心房道和心房的特定原生细胞.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 中皮细胞在胃化过程中经历复杂的迁移,形成心脏.
- 了解心脏原生细胞的起源和迁移对于发育生物学至关重要.
研究的目的:
- 在小鼠早期心脏发育过程中跟踪中皮细胞迁移和血统.
- 为了识别不同的心脏祖先种群及其迁移行为.
主要方法:
- 活着的小鼠胚胎的光片成像,从化到心脏管的形成.
- 细胞谱系树和3D迁移路径的重建,最多为5个细胞分裂.
- 对原始细胞时间,命运分配和迁移轨迹的分析.
主要成果:
- 已确定左心室/心房道 (LV/AVC) 和心房肌细胞的独立原始细胞,在特定时间出现.
- 观察到LV/AVC祖先的早期分化形成心脏新月,后来形成心房输入管道.
- 具有广泛潜力和多样化的迁徙路径的短命多能原始体的特征,与命运相同的原始体形成鲜明对比.
- 对于不同类型的细胞,发现了不同的迁移模式,包括胚外半皮 (ExEm) 先生的快速,分散的迁移以及内心,LV/AVC和心周细胞的逐渐分离.
结论:
- 胃流动期间的中皮细胞迁移是有组织的,有不同的祖先被分配给特定的心脏命运.
- 早期发育的可塑性存在于短命的多能原始体中.
- 细胞行为,包括速度和分散,在心脏发育的后期阶段分离,影响命运分配.
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