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[Effect of heparin on the interaction between platelets with collagen].

An effect of a standard heparin preparation on the interaction between blood platelets and collagen has been investigated. The experiments have shown, that the addition of heparin in the concentration of 0.3; 0.6 or 0.9 IU/mL did not change the interaction between blood platelets and collagen. Such interaction increased, when heparin concentration was 1,2 IU/mL, and remained unchanged despite the further increase in heparin concentration. The authors suggest that such a course of this interaction results from the stimulating action of heparin added in adequate concentration on protein release from platelet alpha granulations--which bound GP II b/III a complex with collagen.