基于微管的杯状结构在在不同基质类型上培养的U2OS细胞中微粒子吸收过程中出现
Carina Rząca1, Agata Kubisiak2, Dominik Panek1
1Jagiellonian University, ul. Łojasiewicza 11, Kraków 30-348, Poland; Department of Molecular and Interfacial Biophysics M. Smoluchowski Institute of Physics, Faculty of Physics Astronomy and Applied Computer Science, ul. Łojasiewicza 11, Kraków 30-348, Poland; Jagiellonian University, ul. Łojasiewicza 11, Kraków 30-348, Poland; Doctoral School of Exact and Natural Sciences, Kraków 30-348, Poland.
Tissue & cell
|January 6, 2026
概括
癌细胞的行为,包括形状,弹性和粒子吸收,随着基质刚度的变化而发生变化. 软凝上的U2OS细胞显示了微粒内部化增加和独特的微管结构,突出了机械敏感性.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 癌症研究 癌症研究
背景情况:
- 基质刚度会影响癌细胞的行为,影响细胞形态,机制和细胞骨组织.
- 了解这些机械敏感反应对于癌细胞研究至关重要.
研究的目的:
- 调查基质刚度如何影响U2OS骨髓瘤细胞形态,机械性质和微粒体吸收.
- 探索细胞骨重塑,特别是微管和相关蛋白质在基质依赖细胞过程中的作用.
主要方法:
- 在聚烯胺 (PA) 水凝 (40kPa) 和刚性玻璃基板上培养U2OS细胞.
- 通过光显微镜评估细胞形态和细胞骨组织.
- 使用原子力显微镜 (AFM) 测量细胞的机械性能.
- 使用光微球量化微粒内部化,并通过3D成像分析细胞骨结构.
主要成果:
- 与40kPaPA凝上的细胞相比,玻璃上的细胞表现出更大的表面积,更多的激素应力纤维,以及增加的刚性.
- 在40kPa的PA凝中,微粒体的吸收显著更高,细胞在颗粒体周围形成基于微管的"杯状"结构.
- IQGAP1被确定为一种与微管相关的关键蛋白质,局部存在于这些结构中,可能参与内细胞分裂.
结论:
- 基质刚度显著调节U2OS细胞行为,包括形态学,机械学和内细胞活动.
- 新的微管杯状结构和IQGAP1在更软的基板上的微粒子吸收中的作用被揭示出来.
- 这些发现强调了骨髓瘤细胞的机械敏感性,并提供了关于细胞吸收机制的见解.
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