纤维密度和矩阵刚度对A549瘤多细胞迁移的双重影响
Bo-Jiang Lin1, Hiromichi Fujie2, Masashi Yamazaki2
1Department of Mechanical Systems Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 1920397, Japan.
Biochemical and biophysical research communications
|November 23, 2024
概括
瘤矩阵的刚性和纤维结构影响癌细胞的入侵. 物理压缩会使矩阵变硬,促进入侵,但纤维结构可能会抵消这种效应.
科学领域:
- 生物物理学的生物物理.
- 癌症生物学 癌症生物学
- 生物材料是一种生物材料.
背景情况:
- 瘤微环境的生物力学特性,包括细胞外矩阵 (ECM) 物理,显著影响瘤的进展和转移.
- 瘤生长诱导矩阵压缩,度梯度可以引导癌细胞入侵 (durotaxis),但缺乏全面的机械描述.
研究的目的:
- 为了研究集体运动对A549腺癌球体体在硬度和纤维调整的原基质中的影响.
- 了解矩阵变形对瘤-ECM相互作用的机械影响,模仿固体瘤的发展.
主要方法:
- A549腺癌球体在经过离心压缩的原结构上培养.
- 离心物理硬和凝结了原基质,模拟瘤诱导的变形.
- 在7天内评估了对球状体扩张,增殖强度和矩阵金属蛋白酶 (MMP) 活性的影响.
主要成果:
- 压缩的原结构阻碍了球状体的扩张,独立于瘤的增殖能力.
- 由于压缩结构的刚性减弱,矩阵金属蛋白酶活性增加.
- 矩阵的纤维结构似乎抵消了由矩阵刚度引起的运动性.
结论:
- 矩阵压缩改变了瘤微环境的生物力学,影响了癌细胞的行为.
- 虽然矩阵硬化可以促进入侵,但ECM的纤维结构在调节这种反应方面发挥着至关重要的作用.
- 这些发现突出了矩阵力学和瘤细胞运动之间的复杂相互作用,这与理解转移有关.
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