title: Heparin inhibits PGE1-sensitive adenylate cyclase and antagonizes PGE1 antiaggregating effect in human platelets.
abstract: PGE1-sensitive adenylate cyclase in human platelet lysates in inhibited (50%) by heparin (10 microgram/ml). Inhibition is of a mixed type when analyzed by double-reciprocal analysis. It is also shown that heparin (2.5 to 10 microgram/ml) effectively antagonizes the antiaggregating effect of PGE1 on ADP-induced platelet aggregation. The possibility that heparin may exert its platelet-aggregating activity through inhibition of PGE1-sensitive AC in human platelets is discussed.
mesh_terms: D000067956:Adenylyl Cyclase Inhibitors; D006493:Heparin / Q000494:pharmacology*; D006801:Humans; D010974:Platelet Aggregation / Q000187:drug effects*; D011458:Prostaglandins E / Q000494:pharmacology*
chemical_list: D000067956:Adenylyl Cyclase Inhibitors; D011458:Prostaglandins E; D006493:Heparin