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. 1992 Mar;89(3):878–882. doi: 10.1172/JCI115667

Platelet-derived growth factor receptors on macrovascular endothelial cells mediate relaxation via nitric oxide in rat aorta.

L D Cunningham 1, P Brecher 1, R A Cohen 1
PMCID: PMC442933  PMID: 1311719

Abstract

The effects of platelet-derived growth factor (PDGF) were studied in isolated rings of rat aorta contracted submaximally to phenylephrine. The BB isoform of PDGF elicited relaxation in rings with endothelium and further contraction in rings without endothelium. Both the endothelium-dependent relaxation and endothelium-independent contraction occurred at concentrations known to induce PDGF receptor-mediated responses in cultured cells. Furthermore, the relaxation was isoform specific. This conclusion is supported by the unique ability of PDGF-BB to induce endothelium-dependent relaxations, as well as by studies showing isoform specific, concentration-dependent desensitization of PDGF-BB relaxation. The relaxation induced by PDGF-BB was prevented by N omega-nitro-L-arginine. It was also observed that endothelium-independent contractions to the AB and AA isoforms of PDGF were less than those to PDGF-BB. Contrary to the widely held view that PDGF receptors are not present on the endothelium of macrovessels, these studies provide evidence for an endothelium-dependent, nitric oxide mediated relaxation of rat aorta caused by PDGF via PDGF beta beta-receptors.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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