液压压力和actin聚合的联合力量驱动内皮尖细胞迁移和发芽血管新生
Igor Kondrychyn1, Liqun He2, Haymar Wint1
1Laboratory for Vascular Morphogenesis, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.
eLife
|February 20, 2025
概括
内皮尖细胞通过Aquaporins使用水静压进行迁移,这是一种补充actomyosin力量的新机制. 这一发现对于理解组织形成和血管发育至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 身体生理学 身体生理学
背景情况:
- 细胞迁移对于组织发育和成形至关重要.
- 内皮尖细胞通过入侵无血管组织来驱动生长的血管生成.
- 内皮细胞 (ECs) 即使在活性蛋白聚合被抑制时也表现出迁移,这表明了替代机制.
研究的目的:
- 研究内皮尖细胞迁移的替代机制.
- 探索水素 (Aqps) 和水静压在EC迁移中的作用.
- 为了了解水静压和活体中依赖于actomyosin的迁移之间的相互作用.
主要方法:
- 利用斑马鱼模型研究发芽血管生成.
- 对Aqp1a.1和Aqp8a.1.1进行了功能丧失研究.
- 抑制了actin聚合,以评估其与Aqp抑制的联合作用.
- 在EC中分析了Aqps的VEGFR2-依赖表达.
主要成果:
- ECs采用Aquaporin介导的水流入和水静压机制来进行迁移.
- 斑马鱼EC在血管芽中以VEGFR2-依赖的方式表达aqp1a.1和aqp8a.1.
- 失去了Aqp1a.1和Aqp8a.1,由于细胞质体积增加减少和膜突起而导致断层间血管形成受损.
- 联合抑制actin聚合和Aqp功能显著阻碍了生长的血管生成.
结论:
- 内皮末端细胞利用了依赖于actomyosin和依赖于水静压的机制来实现强大的迁移.
- 水素介导的水静压是内皮细胞迁移和组织形态发生的一个关键,以前被低估的因素.
- 这项研究揭示了血管发育的新途径,并提供了对组织塑造过程的见解.
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