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内皮细胞通过构建基底膜,作为肌纤维细胞的支架,来调节膜形态发生
Haruko Watanabe-Takano1, Katsuhiro Kato2, Eri Oguri-Nakamura3
1Department of Molecular Pathophysiology, Institute of Advanced Medical Sciences, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8602, Japan. t-haruko@nms.ac.jp.
Nature communications
|March 4, 2024
概括
内皮细胞 (ECs) 通过构建引导肌纤维细胞的底层膜来编排肺气膜生成. 这一对于肺部发育至关重要的过程涉及Rap1和整蛋白信号,揭示了器官形态发生的新型EC驱动机制.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 肺部医学 肺部医学
背景情况:
- 肺膜生成,肺膜的形成,是一个复杂的形态遗传过程.
- 膜内皮细胞 (ECs) 在肺部发育中起着至关重要的作用,但潜在的机制尚不清楚.
- 肌纤维细胞在胞形成过程中形成二次胞是必不可少的.
研究的目的:
- 阐明ECs调节藻发生的机制.
- 研究Rap1和整合素信号传导在EC介导肺部发育中的作用.
- 了解EC如何构建底层膜以引导肌纤维细胞功能.
主要方法:
- 产生和分析EC特定的Rap1缺陷 (Rap1iECKO) 的小鼠.
- 产生和分析EC特异性整合素β1缺乏的小鼠.
- 评估肺部七角形的形成,气膜化和底层膜结构.
主要成果:
- 特定于EC的Rap1缺陷 (Rap1iECKO) 会导致斑块形成受损和低膜化.
- 拉普1iECKO小鼠显示肌纤维细胞的机械信号减少和缺陷的原4型 (Col-4) 招募到底层膜 (BMs).
- 欧共体特异性整体蛋白β1缺乏导致低膜化,无组织的肌肉细胞和缺陷的肌纤维细胞机械信号传递.
结论:
- 膜EC通过Rap1依赖的整体蛋白β1信号构建BMs,为肌纤维细胞提供支架.
- 这种BM结构激活了肌纤维细胞中的机械信号,驱动了形形成和膜生成.
- 这项研究揭示了肺发育期间器官形态发生的EC功能介导机制.
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