Resveratrol attenuates adenosine diphosphate-induced platelet activation by reducing protein kinase C activity.
Inappropriate platelet activation is the key point of thrombogenesis. The aim of the present study was to investigate the effects of resveratrol (RESV), a compound extracted from the Chinese medicinal herb Polygonum cuspidatum sieb et Zucc, on the platelet activation induced by adenosine diphosphate (ADP) and its possible mechanism. The percentage of platelet aggregation and surface P-selectin-positive platelets, and the activity of protein kinase C (PKC) of platelet were observed with platelet aggregometer, flow cytometry and phosphorimaging system, respectively. RESV at 25, 50 and 100 microM showed anti-platelet aggregation and inhibition of surface P-selectin-positive platelets in a concentration-dependent manner. RESV (50 microM) inhibited the activity of PKC in the membrane fraction of platelets and decreased the percentage of membrane associated PKC activity in total PKC activity. Moreover, DL-erythro-1,3-Dihydroxy-2-aminooctadecane, an elective protein kinase C inhibitor (PKCI), and RESV had additive effects of inhibiting the percentage of platelet aggregation and surface P-selectin-positive platelets. It is suggested that RESV may inhibit platelet aggregation, the percentage of surface P-selectin-positive platelets and subsequent thrombus formation. The mechanisms may be partly relative to the decrease of the activity of PKC of platelets.
Department of CCU, The First Affiliated Hospital, Inner Mongolia Medical College, Hohhot, China.
Yu-Min
YM
Yang
Xing-Xiang
XX
Wang
Jun-Zhu
JZ
Chen
Shi-Jun
SJ
Wang
Hu
H
Hu
Hong-Qiang
HQ
Wang
D000244:Adenosine Diphosphate / Q000494:pharmacology*; D000328:Adult; D001792:Blood Platelets / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D002462:Cell Membrane / Q000187:drug effects / Q000201:enzymology; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D045468:Fallopia japonica; D006801:Humans; D019007:P-Selectin / Q000378:metabolism; D015539:Platelet Activation / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*; D011493:Protein Kinase C / Q000187:drug effects / Q000378:metabolism*; D000077185:Resveratrol; D013267:Stilbenes / Q000494:pharmacology*
D004365:Drugs, Chinese Herbal; D019007:P-Selectin; D010975:Platelet Aggregation Inhibitors; D013267:Stilbenes; D000244:Adenosine Diphosphate; D011493:Protein Kinase C; D000077185:Resveratrol