细胞内力量定位对癌细胞入侵的影响:通过实验验证的计算模型揭示机械权衡
Amir Shaghoury1, Sapir Dadon1, Daphne Weihs1,2
1Faculty of Biomedical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel.
ACS biomaterials science & engineering
|March 8, 2026
概括
癌细胞的入侵深度和效率取决于内部应用于哪些力量. 底部应用的力量通过减少核压力来促进更深,更有效的入侵,可能提供新的抗转移策略.
科学领域:
- 生物物理学的生物物理.
- 癌症生物学 癌症生物学
- 细胞力学 细胞力学
背景情况:
- 转移驱动大多数癌症死亡,涉及癌细胞对其微环境的力量.
- 动氨酸是细胞力量和运动的关键,但细胞内力量局部化在入侵中的作用还未得到充分研究.
- 之前的工作建立了一个临床相关的测定和有限元模型,用于癌细胞入侵.
研究的目的:
- 为了研究细胞内力应用位置 (核的顶部与底部) 如何影响癌细胞入侵效率.
- 分析力局部化对隙深度,细胞内应力和力向微环境传递的影响.
- 了解基于武力应用的入侵和细胞稳定之间的机械权衡.
主要方法:
- 利用经过实验验证的癌细胞入侵的有限元模型.
- 在不同的力级 (≤100 nN和≥150 nN) 下,模拟在核的顶部和底部施加力.
- 分析了隙深度,细胞内应力,核应力和传递到周围凝的应力.
主要成果:
- 低力 (≤100 nN):顶力导致更深的痕 (35-42%),但凝应力较少 (~10%).
- 高力 (≥150nN):底力传递的凝应力>15%,可比缩入深度和显著减少的核应力 (>250%).
- 当细胞质比细胞核柔软时,这些影响更为明显,这对于侵袭性癌细胞来说是典型的.
结论:
- 细胞内力量局部化极大地影响了入侵效率和细胞稳定性.
- 顶部应用的力量可能有利于在柔软的环境中进行浅层入侵.
- 底部应用的力量,模仿尖端突出,优化深入入侵,降低细胞完整性的风险,表明潜在的抗转移点.
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