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Relative platelet-derived growth factor receptor subunit expression determines cell migration to different dimeric forms of PDGF



Relative platelet-derived growth factor receptor subunit expression determines cell migration to different dimeric forms of PDGF



Growth Factors 3(4): 315-324



Platelet-derived growth factor (PDGF) receptor transfectants of a fibroblastoid cell line (BHK) have been used to investigate the ability of the three dimeric forms of PDGF to elicit a chemotactic response. Cells transfected with the beta receptor subunit were only responsive to PDGF-BB, whereas cells expressing the alpha-receptor subunit were equally responsive to all three dimeric forms, PDGF-AA, PDGF-AB, and PDGF-BB. A positive chemotactic response correlated with rearrangement of actin organization. In a study of human arterial smooth muscle cells that express both PDGF receptor subunits endogenously, we again found that recombinant PDGF-AA could elicit a chemotactic response. However, the two smooth muscle cell isolates we examined differed in their chemotactic response to PDGF-AA. This difference correlated closely with their ability to respond mitogenically to this PDGF dimeric form, and the magnitude of both chemotactic and mitogenic responses was related to the proportion of the two receptor subunit species at the cell surface.

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Accession: 041226031

Download citation: RISBibTeXText

PMID: 2175209

DOI: 10.3109/08977199009003674


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