Platelet-derived growth factor-BB modulates membrane mobility of beta1 integrins.

Abstract:

:Platelet-derived growth factor (PDGF)-BB elicits a migratory response including reorganization of the actin cytoskeleton in different cell types. Here we have investigated the effects of PDGF-BB stimulation on beta(1) integrin containing focal adhesions in human diploid fibroblasts adhered to collagen type I. Stimulation with PDGF-BB dissociated focal adhesions and relocated beta(1) integrins from focal adhesions to the periphery of the cells. These changes were rapid and transient in character. Relocation of beta(1) integrins was prevented by inhibitors of phosphoinositide-3-kinase and protein kinase C. PDGF-BB stimulated fibroblasts exhibited an increased diffusion coefficient of cell surface beta(1) integrins as determined by fluorescence recovery of photobleaching. The cell surface expression of beta(1) integrins was not changed after stimulation with PDGF-BB. Our data suggest that PDGF-BB increases the dynamic properties of cell-surface beta(1) integrins, which most likely are important for the migratory response elicited by PDGF-BB.

authors

Ahlén K,Ring P,Tomasini-Johansson B,Holmqvist K,Magnusson KE,Rubin K

doi

10.1016/j.bbrc.2003.12.057

subject

Has Abstract

pub_date

2004-01-30 00:00:00

pages

89-96

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006291X03026640

journal_volume

314

pub_type

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