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[Comparison of the effects of SIN-1, sodium nitroprusside and nitrate derivatives on the inhibition of blood platelet aggregation and activation of soluble platelet guanylate-cyclase].

We compared the effects of various nitrates, sodium nitroprusside (SNP), molsidomine, and its bioactive metabolite SIN-1, on platelet aggregation and on the activity of soluble guanylate-cyclase from human platelets. SIN-1 and SNP proved to be potent inhibitors of platelet aggregation and activated soluble guanylate-cyclase in contrast to nitrates and molsidomine which produced weak inhibition of aggregation and failed to activate soluble guanylate-cyclase. These results suggest a correlation between these products' inhibitory effect on aggregation and activation of guanylate-cyclase.