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This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Dempfle, C.-E. Articles by Heene, D. L. Search for Related Content PubMed PubMed Citation Articles by Dempfle, C.-E. Articles by Heene, D. L. Related Collections Hemostasis, Thrombosis, and Vascular Biology Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Blood, 15 October 2000, Vol. 96, No. 8, pp. 2793-2802 HEMOSTASIS, THROMBOSIS, AND VASCULAR BIOLOGY Analysis of fibrin formation and proteolysis during intravenous administration of ancrod Carl-Erik Dempfle, Sotiria Argiriou, Klaus Kucher, H. Müller-Peltzer, Klaus Rübsamen, and Dieter L. Heene From the University of Heidelberg, Mannheim University Hospital, First Department of Medicine, Theodor Kutzer Ufer, D-68167 Mannheim, Germany; Knoll AG, D-67008 Ludwigshafen, Germany. Ancrod is a purified fraction of venom from the Malayan pit viper, Calloselasma rhodostoma, currently under investigation for treatment of acute ischemic stroke. Treatment with ancrod leads to fibrinogen depletion. The present study investigated the mechanisms leading to the reduction of plasma fibrinogen concentration. Twelve healthy volunteers received an intravenous infusion of 0.17 U/kg body weight of ancrod for 6 hours. Blood samples were drawn and analyzed before and at various time points until 72 hours after start of infusion. Ancrod releases fibrinopeptide A from fibrinogen, leading to the formation of desAA-fibrin monomer. In addition, a considerable proportion of desA-profibrin is formed. Production of desA-profibrin is highest at low concentrations of ancrod, whereas desA-profibrin is rapidly converted to desAA-fibrin at higher concentrations of ancrod. Both desA-profibrin and desAA-fibrin monomers form fibrin complexes. A certain proportion of complexes carries exposed fibrin polymerization sites EA, indicating that the terminal component of the protofibril is a desAA-fibrin monomer unit. Soluble fibrin complexes potentiate tissue-type plasminogen activator-induced plasminogen activation. Significant amounts of plasmin are formed when soluble fibrin in plasma reaches a threshold concentration, leading to the proteolytic degradation of fibrinogen and fibrin. In the present setting, high concentrations of soluble fibrin are detected after 1 hour of ancrod infusion, whereas a rise in fibrinogen and fibrin degradation products, and plasmin-2-plasmin inhibitor complex levels is first detected after 2 hours of ancrod infusion. Ancrod treatment also results in the appearance of cross-inked fibrin degradation product D-dimer in plasma. © 2000 by The American Society of Hematology.   CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: B. Kerlin, B. C. Cooley, B. H. Isermann, I. Hernandez, R. Sood, M. Zogg, S. B. Hendrickson, M. W. Mosesson, S. Lord, and H. Weiler Cause-effect relation between hyperfibrinogenemia and vascular disease Blood, March 1, 2004; 103(5): 1728 - 1734. [Abstract] [Full Text] [PDF]

	Copyright © 2000 by American Society of Hematology         Online ISSN: 1528-0020