title: Is prostacyclin a physiologically important circulating anti-platelet agent?
mesh_terms: D000244:Adenosine Diphosphate / Q000097:blood; D000937:Antigen-Antibody Reactions; D001792:Blood Platelets / Q000502:physiology*; D000242:Cyclic AMP / Q000097:blood; D011464:Epoprostenol / Q000097:blood / Q000276:immunology / Q000494:pharmacology*; D006801:Humans; D010974:Platelet Aggregation / Q000187:drug effects*; D011453:Prostaglandins / Q000494:pharmacology*
chemical_list: D011453:Prostaglandins; D000244:Adenosine Diphosphate; D011464:Epoprostenol; D000242:Cyclic AMP