[The antithromboxane activity of alpha- and omega-modified carbocyclic analogs of PGH1]

In in vitro experiments on a model of arachidonate- and thrombin-induced platelet aggregation, analogues of PG endoperoxides displayed an antiaggregatory effect or stimulated spontaneous platelet aggregation in the whole blood of man and rabbits, but a slight antiaggregatory effect in the rabbit intact organism. The presence of the hydroxyl group instead of the routine alkyl omega-chain produced an antiaggregatory effect due to TxA2 receptor blockade.