Anticoagulant Effects of Heparin Complexes with Prolyl-Glycine Peptide and Glycine and Proline Amino Acids.

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The study demonstrates the formation of heparin complexes with prolyl-glycine peptide and proline and glycine amino acids. The method was developed for in vitro production of these complexes at 1:1 dipeptide to heparin molar ratio and 2:1 amino acid to heparin molar ratio. These complexes, unlike the constituents, proline and glycine, exhibited significant anticoagulant, antiplatelet, and fibrin-depolymerization activities of varying degree in vitro and in vivo. The heparin-dipeptide complex produced maximum effect. The dipeptide by itself also showed anticoagulant properties, but less pronounced than in the complex with heparin.