隔离和活的MCF7癌细胞核之间的粘性弹性差异通过AFM微风学解决
Ellen Juel Pørtner1, Anna Mularski1, Tobias William Jarrett1
1Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark.
Journal of the Royal Society, Interface
|June 17, 2025
概括
使用原子力显微镜和活细胞核机制进行了比较. 虽然类似,但孤立的核是较软的,并且表现出更快的从固体转变为液体的行为.
科学领域:
- 细胞和分子机械生物学
- 生物物理学的生物物理.
- 细胞骨的动力学
背景情况:
- 细胞核机制对于细胞功能至关重要,但在孤立细胞和活细胞之间可能存在差异.
- 了解核粘弹性需要时间尺度依赖的分析超出了简单的弹性.
- 原子力显微镜活性微观学 (AFMMR) 提供了一种探测这些属性的方法.
研究的目的:
- 用AFMMR研究和比较使用MCF7细胞中分离和活细胞核的粘弹性特性.
- 评估actin脱聚合对活细胞核力学的影响.
- 建立一个解释细胞核的AFMMR数据的机制框架.
主要方法:
- 使用原子力显微镜活性微观学 (AFMMR) 来测量孤立和活细胞核的频率依赖模量.
- 使用聚烯胺水凝验证了AFMMR技术,包括对悬臂阻力进行校正.
- 应用了杰弗里斯粘弹性模型来分析获得的核力学数据.
主要成果:
- AFMMR显示,隔离细胞和活细胞核具有相似的频率依赖模块,隔离细胞核是较软的.
- 损失触点表明,与活细胞核相比,孤立细胞核的频率从固体状向液体状行为过渡更高.
- 杰弗里斯模型参数对活细胞中分离过程和actin脱聚合的敏感性都表现出了敏感性.
结论:
- AFMMR是一种验证的技术,用于评估孤立细胞和活细胞的核力学.
- 核隔离和actin动力学显著影响核粘弹性特性.
- 杰弗里斯模型为内部和外部核结构的机械贡献分配提供了一个框架.
相关概念视频
Atomic Force Microscopy
3.6K
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
3.6K
Studying the Cytoskeleton
7.2K
The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
7.2K


