通过集成光学显微镜和原子力显微镜研究活细胞对机械刺激的反应。
Live cell response to mechanical stimulation studied by integrated optical and atomic force microscopy.
作者信息
Trache Andreea, Lim Soon-Mi
机构信息
Department of Systems Biology and Translational Medicine, College of Medicine, Cardiovascular Research Institute, Texas A&M Health Science Center, USA.
出版信息
J Vis Exp. 2010 Oct 4(44):2072. doi: 10.3791/2072.
To understand the mechanism by which living cells sense mechanical forces, and how they respond and adapt to their environment, a new technology able to investigate cells behavior at sub-cellular level with high spatial and temporal resolution was developed. Thus, an atomic force microscope (AFM) was integrated with total internal reflection fluorescence (TIRF) microscopy and fast-spinning disk (FSD) confocal microscopy. The integrated system is broadly applicable across a wide range of molecular dynamic studies in any adherent live cells, allowing direct optical imaging of cell responses to mechanical stimulation in real-time. Significant rearrangement of the actin filaments and focal adhesions was shown due to local mechanical stimulation at the apical cell surface that induced changes into the cellular structure throughout the cell body. These innovative techniques will provide new information for understanding live cell restructuring and dynamics in response to mechanical force. A detailed protocol and a representative data set that show live cell response to mechanical stimulation are presented.
为了了解活细胞感知机械力的机制,以及它们如何对环境做出反应和适应,人们开发了一种能够在亚细胞水平上以高空间和时间分辨率研究细胞行为的新技术。因此,将原子力显微镜(AFM)与全内反射荧光(TIRF)显微镜和快速旋转盘(FSD)共聚焦显微镜集成在一起。该集成系统广泛适用于任何贴壁活细胞的各种分子动力学研究,能够实时直接光学成像细胞对机械刺激的反应。由于在细胞顶端表面的局部机械刺激导致整个细胞体的细胞结构发生变化,肌动蛋白丝和粘着斑出现了显著的重排。这些创新技术将为理解活细胞对机械力的重组和动力学提供新的信息。本文还介绍了一个详细的实验方案和一组显示活细胞对机械刺激反应的代表性数据集。