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  • Title: Platelet aggregation in recombinant-hirudin-anticoagulated blood.
    Author: Glusa E.
    Journal: Haemostasis; 1991; 21 Suppl 1():116-20. PubMed ID: 1909991.
    Abstract:
    Recombinant hirudin (r-hirudin) inhibited the thrombin-induced aggregation and 14C-serotonin secretion of human platelets in the same concentration range as native hirudin. In r-hirudinized blood, lower spontaneous platelet aggregation was found than in citrated or heparinized blood. Except for a demonstrable aggregation-potentiating effect, adrenaline did not induce aggregation in r-hirudin- or in citrate-anticoagulated blood. The lowest platelet adhesion to glass surface was found in r-hirudinized plasma. The ADP-induced aggregation was nearly the same in the three differently anticoagulated plasma samples: however, desaggregation predominated in r-hirudinized plasma. Adrenaline caused only a slight aggregation in r-hirudinized plasma. ADP and adrenaline caused 14C-serotonin secretion in citrated plasma only. The collagen- as well as the PAF- and arachidonic-acid-induced aggregation did not differ significantly in the three plasma samples. Hence, r-hirudin is suitable for studying platelet functions at physiological calcium concentrations.
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