由不同的机制形成的细胞间道纳米管的机械性能
Yanli Sun1, Huikai Zhang1, Ilya B Zavodnik2
1Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, School of Aerospace Engineering, Tsinghua University, Beijing, 100084, China.
Heliyon
|September 12, 2024
概括
道纳米管 (TNT) 是用于货物运输的细胞连接. 这项研究揭示了由不同的机制形成的TNT具有相似的机械性质,受大小,细胞骨和细胞外基质的影响.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 机械生物学 机械生物学
背景情况:
- 道纳米管 (TNTs) 便于各种货物的细胞间运输.
- TNTs可以通过actin驱动的突起或细胞与细胞接触和脱而形成.
- 由不同的机制形成的TNTs的机械性质在很大程度上仍然没有特征.
研究的目的:
- 研究和比较通过不同的机制形成的TNT的机械性能.
- 了解TNT形成机制如何影响TNT的抗拉强度和弹性.
- 探索细胞和环境因素对TNT机制的影响.
主要方法:
- 开发用于机械测试TNTs的新型微操作技术.
- 在HEK293 (突出驱动) 和C2C12 (接触驱动) 电池中对TNT进行比较分析.
- 研究细胞骨和细胞外Ca2+的影响,以及细胞外矩阵 (ECM) 硬效应.
主要成果:
- 由这两种机制形成的TNT具有相似的抗拉强度,并表现为弹性元素.
- TNT的抗拉强度显示尺寸取决于长度和直径.
- 细胞骨完整性,细胞外Ca2+和ECM刚性显著调节TNT的机械性质.
结论:
- 在不同的形成路径中,TNTs的机械性能保持不变.
- TNT 机械是适应性的,并受到细胞和微环境线索的影响.
- 一个理论模型阐明了TNT尺寸,iTNT数量和机械性能之间的关系.
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