Live Cell Imaging during Mechanical Stretch

Journal of Visualized Experiments : JoVE
Gabriel RápaloEsra Roan

Abstract

There is currently a significant interest in understanding how cells and tissues respond to mechanical stimuli, but current approaches are limited in their capability for measuring responses in real time in live cells or viable tissue. A protocol was developed with the use of a cell actuator to distend live cells grown on or tissues attached to an elastic substrate while imaging with confocal and atomic force microscopy (AFM). Preliminary studies show that tonic stretching of human bronchial epithelial cells caused a significant increase in the production of mitochondrial superoxide. Moreover, using this protocol, alveolar epithelial cells were stretched and imaged, which showed direct damage to the epithelial cells by overdistention simulating one form of lung injury in vitro. A protocol to conduct AFM nano-indentation on stretched cells is also provided.

Citations

Jan 15, 2020·Proceedings of the National Academy of Sciences of the United States of America·Zijun DengAndreas Lendlein
Apr 12, 2019·Frontiers in Bioengineering and Biotechnology·Oliver FriedrichBoris Martinac

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