Monitoring in real-time focal adhesion protein dynamics in response to a discrete mechanical stimulus
The adhesion of cells to the extracellular matrix is a hierarchical, force-dependent, multistage process that evolves at several temporal scales. An understanding of this complex process requires a precise measurement of forces and its correlation with protein responses in living cells. We present a...
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Veröffentlicht in: | Review of scientific instruments 2017-01, Vol.88 (1), p.013703-013703 |
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creator | von Bilderling, Catalina Caldarola, Martín Masip, Martín E. Bragas, Andrea V. Pietrasanta, Lía I. |
description | The adhesion of cells to the extracellular matrix is a hierarchical, force-dependent, multistage process that evolves at several temporal scales. An understanding of this complex process requires a precise measurement of forces and its correlation with protein responses in living cells. We present a method to quantitatively assess live cell responses to a local and specific mechanical stimulus. Our approach combines atomic force microscopy with fluorescence imaging. Using this approach, we evaluated the recruitment of adhesion proteins such as vinculin, focal adhesion kinase, paxillin, and zyxin triggered by applying forces in the nN regime to live cells. We observed in real time the development of nascent adhesion sites, evident from the accumulation of early adhesion proteins at the position where the force was applied. We show that the method can be used to quantify the recruitment characteristic times for adhesion proteins in the formation of focal complexes. We also found a spatial remodeling of the mature focal adhesion protein zyxin as a function of the applied force. Our approach allows the study of a variety of complex biological processes involved in cellular mechanotransduction. |
doi_str_mv | 10.1063/1.4973664 |
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subjects | Adhesion tests Atomic force microscopy Biological activity Cell Physiological Phenomena Correlation analysis Fluorescence Focal Adhesions Kinases Mechanotransduction, Cellular Proteins Proteins - chemistry Real time Recruitment Scientific apparatus & instruments Vinculin |
title | Monitoring in real-time focal adhesion protein dynamics in response to a discrete mechanical stimulus |
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