素调节收缩性和调节屏障功能在Rho爆发中介紧接口重塑期间
Zie Craig1, Torey R Arnold1, Kelsey Walworth1
1Department of Molecular, Cellular, and Developmental Biology; University of Michigan; Ann Arbor, Michigan, 48109; USA.
bioRxiv : the preprint server for biology
|November 28, 2024
概括
亚尼林通过控制RhoA活性来调节细胞结节的修复. 这种脚手架蛋白质对于维持屏障功能和修复紧密交叉点的泄漏至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 身体生理学 身体生理学
背景情况:
- 细胞-细胞结合点,特别是紧密结合点,必须动态重塑,以保持在细胞形状变化期间的屏障功能.
- 已经确定了一种涉及局部,短暂的RhoA激活 ("Rho火焰") 的快速紧结修复途径,促进了由actomyosin介导的重塑.
- 结节延长通过流入和p115RhoGEF招募触发RhoA激活,但调整RhoA活性和Myosin II收缩性的机制尚不清楚.
研究的目的:
- 研究脚手架蛋白质阿尼林在紧密结合修复过程中调节RhoA活性和actomyosin收缩性的作用.
- 阐明Anillin如何影响Rho火焰的动态及其对结合点完整性的影响.
主要方法:
- 在细胞培养中进行阿尼林抗击实验.
- 使用活细胞成像分析RhoA活动动态在Rho爆发.
- 评估F-actin和Myosin II在结点上的积累.
- 功能性测试,以评估紧紧的节点修复和屏障功能.
主要成果:
- 亚尼林局部化到Rho爆发并调节RhoA活动和actomyosin收缩.
- 氨基林倒置导致更强烈但更短的Rho爆发,F-actin和Myosin II积累减少.
- 这导致节点收缩减少,并削弱了紧密的节点断裂的强化.
- 林依赖的RhoA调节对于有效的紧接口泄漏修复和防止屏障损坏至关重要.
结论:
- 素通过调整RhoA信号传递和actomyosin动态,在紧张结点修复中发挥着新的调节作用.
- 素对于维持细胞屏障功能和修复紧密结节中的破裂至关重要.
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