The involvement of nitric oxide in the responses of the hemostasis system to the appearance of proline-containing peptides in the blood was studied in experiments on rats. It was shown that a single intranasal administration of peptides PGP, RPGP, and PGPL to rats led to an increase in fibrinolytic, anticoagulant, and antiplatelet potential of blood. The use of the non-selective NO-synthase blocker L-NAME almost completely inhibited the anticoagulant effects of the glyprolines. It was found that the mechanism of the anticoagulant-fibrinolytic and antiplatelet action of glyproline peptides is determined by the activation of the enzymatic pathway of nitric oxide formation. The obtained results revealed the involvement of nitric oxide in the implementation of hemostatic and vascular-endothelial functions of the organism.
Keywords: L-NAME; glyproline peptides; hemostasis system; nitric oxide; vascular endothelial function.
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