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.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ahlén K,Ring P,Tomasini-Johansson B,Holmqvist K,Magnusson KE,Rubin Kdoi
10.1016/j.bbrc.2003.12.057subject
Has Abstractpub_date
2004-01-30 00:00:00pages
89-96issue
1eissn
0006-291Xissn
1090-2104pii
S0006291X03026640journal_volume
314pub_type
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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