Integrin activation and matrix binding mediate cellular responses to mechanical stretch - PubMed (original) (raw)
. 2005 Apr 29;280(17):16546-9.
doi: 10.1074/jbc.C400455200. Epub 2005 Mar 10.
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- PMID: 15760908
- DOI: 10.1074/jbc.C400455200
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Integrin activation and matrix binding mediate cellular responses to mechanical stretch
Akira Katsumi et al. J Biol Chem. 2005.
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Abstract
Mechanical tension is a critical determinant of cell growth, differentiation, apoptosis, migration, and development. Integrins have been implicated in sensing force but little is known about how forces are transduced to biochemical signals. We now show that mechanical strain stimulates conformational activation of integrin alphavbeta3 in NIH3T3 cells. Integrin activation is mediated by phosphoinositol 3-kinase and is followed by an increase in integrin binding to extracellular matrix proteins. Mechanical stretch stimulation of JNK was dependent on new integrin binding to extracellular matrix. These data define a molecular mechanism for the role of integrins in mechanotransduction.
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