Naftidrofuryl inhibits the release of 5-hydroxytryptamine and platelet-derived growth factor from human platelets.
Angioplasty and bypass-grafting are associated with restenosis which limits their efficacy. Platelet-rich thrombus formation is the predominant cause of acute occlusion whereas platelet release products with proliferating properties, e.g. 5-hydroxytryptamine (5-HT) and platelet-derived growth factor (PDGF), may contribute to late restenosis. Naftidrofuryl (NAF), a drug for the treatment of peripheral vascular disease, was shown previously to inhibit platelet shape change and aggregation. This study establishes whether NAF inhibits the release of 5-HT and PDGF from platelets obtained from healthy subjects. Platelets stimulated with agonists aggregated less and released less 5-HT/PDGF when pre-incubated with NAF. Indomethacin (INDO), a cyclooxygenase inhibitor, alone inhibited aggregation and PDGF/5-HT release; NAF enhanced the inhibitory effects of INDO. The effect of NAF, on its own or in combination with a cyclooxygenase inhibitor, may therefore confer protection against graft occlusion.
Barradas
M A
MA
Department of Chemical Pathology and Human Metabolism, Royal Free Hospital School of Medicine, London, UK.
Jagroop
I A
IA
Mikhailidis
D P
DP
D000244:Adenosine Diphosphate / Q000494:pharmacology; D000328:Adult; D001792:Blood Platelets / Q000187:drug effects* / Q000378:metabolism; D002997:Clomipramine / Q000494:pharmacology; D003094:Collagen / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D007213:Indomethacin / Q000494:pharmacology; D008297:Male; D009257:Nafronyl / Q000494:pharmacology*; D010974:Platelet Aggregation / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*; D010982:Platelet-Derived Growth Factor / Q000378:metabolism*; D012701:Serotonin / Q000097:blood* / Q000494:pharmacology
D010975:Platelet Aggregation Inhibitors; D010982:Platelet-Derived Growth Factor; D012701:Serotonin; D009257:Nafronyl; D000244:Adenosine Diphosphate; D003094:Collagen; D002997:Clomipramine; D007213:Indomethacin