NDLI: Plasmin-induced procoagulant effects in the blood coagulation: a crucial role of coagulation factors V and VIII.

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Plasmin-induced procoagulant effects in the blood coagulation: a crucial role of coagulation factors V and VIII.

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Plasmin-induced procoagulant effects in the blood coagulation: a crucial role of coagulation factors V and VIII.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ogiwara, Kenichi Nogami, Keiji Nishiya, Katsumi Shima, Midori
Description	Country affiliation: Japan Author Affiliation: Ogiwara K ( Department of Pediatrics, Nara Medical University, 840 Shijo-cho, Kashihara, Nara, Japan.)
Abstract	Plasminogen activators provide effective treatment for patients with acute myocardial infarction. However, paradoxical elevation of thrombin activity associated with failure of clot lysis and recurrent thrombosis has been reported. Generation of thrombin in these circumstances appears to be owing to plasmin (Plm)-induced activation of factor (F) XII. Plm catalyzes proteolysis of several coagulant factors, but the roles of these factors on Plm-mediated procoagulant activity remain to be determined. Recently developed global coagulation assays were used in this investigation. Rotational thromboelastometry using whole blood, clot waveform analysis and thrombin generation tests using plasma, showed that Plm (> or =125 nmol/l) shortened the clotting times in similar dose-dependent manners. In particular, the thrombin generation test, which was unaffected by products of fibrinolysis, revealed the enhanced coagulation with an approximately two-fold increase of peak level of thrombin generation. Studies using alpha2-antiplasmin-deficient plasma revealed that much lower dose of Plm (> or =16 nmol/l) actually contributed to enhancing thrombin generation. The shortening of clotting time could be observed even in the presence of corn trypsin inhibitor, supporting that Plm exerted the procoagulant activity independently of FXII. In addition, using specific coagulation-deficient plasmas, the clot waveform analysis showed that Plm did not shorten the clotting time in only FV-deficient or FVIII-deficient plasma in prothrombin time-based or activated partial thromboplastin time-based assay, respectively. Our results indicated that Plm did possess procoagulant activity in the blood coagulation, and this effect was likely attributed by multicoagulation factors, dependent on FV and/or FVIII.
File Format	HTM / HTML
ISSN	09575235
Issue Number	6
Volume Number	21
e-ISSN	14735733
Journal	Blood Coagulation & Fibrinolysis
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2010-09-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Hematology Blood Coagulation Drug Effects Factor Viii Physiology Factor V Fibrinolysin Pharmacology Blood Coagulation Tests Dose-response Relationship, Drug Humans Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Hematology

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