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The antifibrinolytic effects of carbon monoxide-releasing molecule-2 are fibrin and alpha(2)-antiplasmin dependent
Journal article   Peer reviewed

The antifibrinolytic effects of carbon monoxide-releasing molecule-2 are fibrin and alpha(2)-antiplasmin dependent

Vance G. Nielsen
Blood coagulation & fibrinolysis, v 21(6), pp 584-587
01 Sep 2010
PMID: 20683324

Abstract

Hematology Life Sciences & Biomedicine Science & Technology
Carbon monoxide derived from a carbon monoxide-releasing molecule [tricarbonyldichlororuthenium(II) dimer; CORM-2] has been recently demonstrated to diminish tissue-type plasminogen activator (tPA)-mediated fibrinolysis of plasma thrombi via enhancement of alpha(2)-antiplasmin-plasmin interactions. The goal of this study was to confirm this mechanism by comparing tPA-mediated fibrinolysis with fibrin-independent, alpha(2)-antiplasmin-resistant streptokinase-mediated fibrinolysis in CORM-2 exposed plasma. Normal plasma was exposed to 0 or 100 mu mol/l CORM-2, with coagulation activated with tissue factor and fibrinolysis initiated with 100 U/ml tPA or 50 U/ml streptokinase. Thrombus growth/disintegration kinetics were monitored with thrombelastography until clot lysis time occurred. Unlike tPA-lysed clots, streptokinase-exposed thrombi demonstrated no significant CORM-2-mediated prolongation of clot growth time or clot lysis time. In contrast, streptokinase-mediated lysis did not significantly change the CORM-2-mediated percentage increase in the maximum rate of clot growth or maximum rate of clot lysis compared with tPA-exposed thrombi. CORM-2 likely attenuates fibrinolysis by a fibrin-dependent/alpha(2)-antiplasmin-dependent mechanism. Additional molecular investigation (e. g., mass spectroscopy) is planned to further elucidate how CORM-2 modifies fibrinogen/fibrin. Blood Coagul Fibrinolysis 21:584-587 (C) 2010 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.

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