在内皮细胞中,lamellipodia的动态和微风学,对细胞差距的关闭
Fernando Teran Arce1, Scott Younger2, Amir A Gaber3
1The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, Florida.
Biophysical journal
|November 18, 2023
概括
这项研究揭示了内皮细胞 (EC) lamellipodia动态如何影响血管屏障修复. 了解这些细胞边缘机制为增强炎症期间的屏障完整性提供了新的目标.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 生理学 生理学 生理学
背景情况:
- 血管内皮细胞 (ECs) 形成一个半透的屏障,通过细胞间隙调节运输.
- 炎症增加了EC缺口的形成,导致血管泄漏,和器官功能障碍.
- 了解EC缺口补充机制对于治疗炎症性疾病至关重要.
研究的目的:
- 为了研究lamellipodia在内皮细胞 (EC) 间隙关闭和屏障恢复中的作用.
- 为了分析EC lamellipodia在缺口关闭期间的生物物理特性和动态.
- 为了探索斯芬戈-1-酸盐对EC斑虫行为的影响.
主要方法:
- 微支柱的制造,以在人类肺部EC中创建可复制的细胞间隙.
- 时间间隔光学显微镜测量EC差距关闭率和运动性.
- 原子力显微镜,以描述EC lamellipodia的粘弹性特性.
- 化学图谱用于分析lamellipodia动态与或没有sphingosine-1-phosphate刺激.
主要成果:
- 在EC缺口关闭期间,Lamellipodia表现出降低了度和增加了类似液体的行为.
- 在隙间关闭过程中始终观察到外围形的形成.
- 斯芬贡素-1-酸盐刺激影响了拉梅利波迪亚的动态.
- 拉梅利波迪亚的消散性EC行为与actomyosin细胞骨重组有关.
结论:
- 在调节收缩性质和促进隙间关闭方面,EC Lamellipodia 发挥着关键作用.
- 拉梅利波迪亚的机械性能对于快速恢复血管屏障至关重要.
- 准拉米利波底蛋白动力学是提高血管屏障完整性的潜在策略.
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