在循环拉伸下细胞基质相互作用的物理生物学
Siddhartha Jaddivada1, Namrata Gundiah2
1Department of Mechanical Engineering, Indian Institute of Science, Bangalore, 560012, India.
Biomechanics and modeling in mechanobiology
|November 27, 2023
概括
细胞力学是由机械敏感的焦点粘附 (FA) 和整合素调节的. 这项研究模拟了基质刚性,带密度和循环拉伸如何影响细胞基质相互作用和力产生,揭示了关键的化学机械合机制.
科学领域:
- 细胞力学 细胞力学
- 生物物理学的生物物理.
- 计算生物学是一种计算生物学.
背景情况:
- 机械敏感的焦点粘附 (FAs) 对于细胞基质相互作用至关重要,通过整合素-连接体结合和应力纤维 (SF) 动态调节细胞功能.
- 在FA中的整合素将细胞外矩阵连接物与细胞内SF连接,使负载转移和细胞引产生.
研究的目的:
- 开发和利用一个多尺度的,随机的有限元素模型来研究细胞组件和基质特性之间的动态相互作用.
- 量化基质刚度,带密度和循环拉伸对纤维细胞机械感知和力产生的影响.
主要方法:
- 在基板上开发了一种一维,多尺度,随机有限元素模型的纤维细胞.
- 整合了信号,SF重塑和FA动态,将随机整合素聚类与连续SF收缩模型联系起来.
- 在不同的基质和机械条件下,量化细胞反应包括引,整合素招募和细胞质水平.
主要成果:
- 细胞的拉力和整合素的招募在空间上有所不同,在状区域的最大值和细胞中心的减少力.
- 为了最大限度的细胞引,最优的基质刚度转移到具有增加联结体密度的更硬的基质.
- 循环拉伸调节了细胞质,整合素度和引力,特别是在符合条件的基板上,并且可以在刚性基板上诱导细胞死亡.
结论:
- 化学机械合对于理解细胞基质机械感知至关重要.
- 基质刚度,带密度和机械拉伸显著影响细胞力产生和粘附动力学.
- 开发的模型提供了关于物理和化学线索如何调节细胞行为和机械反应的见解.
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