由于细胞外力力传输,细胞上集体细胞迁移的快速但有效的强力模式
Amrit Bagchi1, Bapi Sarker1, Jialiang Zhang2
1Department of Mechanical Engineering & Materials Science, Washington University, St. Louis, Missouri, United States of America.
PLoS computational biology
|January 9, 2025
概括
对齐的原纤维通过促进力传递来增强集体细胞迁移. 这导致了更快的迁移速度,减少了细胞力量,揭示了细胞上运动效率的新范式.
科学领域:
- 细胞机械生物学 细胞机械生物学
- 生物物理学的生物物理.
- 组织工程是组织工程.
背景情况:
- 细胞集体利用力量进行迁移,这一过程受到细胞外基质 (ECM) 的影响.
- 已知对齐的ECM纤维会指导细胞迁移,但力-速度关系的基本机制尚不清楚.
研究的目的:
- 研究如何环境配置,具体对准与随机ECM纤维,改变力量-速度关系在集体细胞迁移.
- 阐明细胞机械传导和通过ECM的应力传递在定向细胞运动中的作用.
主要方法:
- 在软基质上利用了上皮细胞 (MCF10A) 细胞群,与对齐的 (AF) 和随机的 (RF) 原纤维.
- 采用了一种新的电机离合器模型来分析力动力学和迁移效率.
- 模拟的 haptotaxis 和 durotaxis 来理解基质相互作用和迁移线索.
主要成果:
- 与随机纤维相比,对齐的纤维促进了更快的迁移,具有较低的引力.
- 纤维对齐增强了运动波和正常的应力传递,同时最大限度地减少了剪切应力.
- 随机化通过破坏运动波和压力传输引发了细胞干扰.
- 电机离合器模型通过由于摩擦力的快速前方稳定来解释强力有效迁移.
结论:
- 对齐的ECM纤维通过优化力-速度动态来作为有效的集体细胞迁移的导管.
- 由基质特性和纤维对齐影响的前沿稳定率是细胞上迁移效率的关键决定因素.
- 这些发现揭示了理解和潜在地控制生物和工程系统中的集体细胞迁移的新范式.
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