RESUMEN
OBJECTIVE: To investigate the effect of protein kinase A (PKA) activation on aggregation funetion of platelets in vitro. METHODS: The peripheral blood of healthy adults were collected, and the washed platelets were gained from collected peripheral blood. The washed platelets were treated with PKA activator Forskolin, then the platelet aggregation was induced by using Ristocetin, Thrombin, Collagen and ADP respectively, the platelet aggregation level was detected by the platelet aggregator. RESULTS: Compared with the controls, 5 µmol/L forskolin significantly inhibited ADP and collagen-induced platelet aggregation (Pï¼0.001), and showed mild inhibiting effect on Thrombin-induced platelet aggregation (Pï¼0.05). 2.5-10 µmol/L forskolin significantly inhibited ADP and Collagen -induced platelet aggregation (Pï¼0.001); but not showed significantly inhibitory effects on Ristocetin-induced platelet aggregation (Pï¼0.05). CONCLUSION: PKA activation inhibits agonists-induced platelet aggregation.