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  • Title: Pharmacological effects of a novel recombinant hirudin, CX-397, in vivo and in vitro: comparison with recombinant hirudin variant-1, heparin, and argatroban.
    Author: Komatsu Y, Inoue Y, Goto Y, Fukazawa T, Hayashi H.
    Journal: Thromb Haemost; 1999 Feb; 81(2):250-5. PubMed ID: 10064001.
    Abstract:
    The novel recombinant hirudin analog CX-397 was investigated with respect to its pharmacological activity and antithrombin profiles in vivo and in vitro. In three different types of thrombosis models in rats, including stasis and thrombin-induced venous, glass surface-activated arterio-venous shunt, and ferric chloride-induced arterial thrombosis models, CX-397 and rHV-1 elicited potent antithrombotic effects, where the minimum effective doses of rHV-1 tended to be higher than those of CX-397 in the arterio-venous shunt and arterial thrombosis models. The hemorrhagic risk of CX-397 in template bleeding in rats was not higher than that of rHV-1, indicating that CX-397 is superior to rHV-1 for treating the platelet-dominant type of thrombosis. However, no differences were detected between CX-397 and rHV-1 in their effects on in vitro coagulation times and thrombin-induced platelet aggregation, suggesting the possibility that some unknown mechanisms other than simple thrombin inhibition are also involved in their antithrombotic actions.
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