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Amendment history:
  • Correction (February 1998)

Research Article Free access | 10.1172/JCI781

Enhancement of rabbit jugular vein thrombolysis by neutralization of factor XI. In vivo evidence for a role of factor XI as an anti-fibrinolytic factor.

M C Minnema, P W Friederich, M Levi, P A von dem Borne, L O Mosnier, J C Meijers, B J Biemond, C E Hack, B N Bouma, and H ten Cate

Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Center for Hemostasis, Thrombosis, Atherosclerosis and Inflammation Research, Central Laboratory of The Netherlands Red Cross Blood Transfusion Service, 1100 DE, Amsterdam, The Netherlands.

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Published January 1, 1998 - More info

Published in Volume 101, Issue 1 on January 1, 1998
J Clin Invest. 1998;101(1):10–14. https://doi.org/10.1172/JCI781.
© 1998 The American Society for Clinical Investigation
Published January 1, 1998 - Version history
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Abstract

Recent in vitro studies have shown that fibrinolytic activity may be attenuated by a thrombin-activatable fibrinolysis inhibitor (TAFI), which is activated by thrombin, generated via the intrinsic pathway of coagulation in a factor XI-dependent way. Thus factor XI may play a role in the regulation of endogenous fibrinolysis. The aim of this study was to investigate the effect of in vivo inhibition of factor XI and TAFI in an experimental thrombosis model in rabbits. Incorporation of anti-factor XI antibodies in jugular vein thrombi resulted in an almost twofold increase in endogenous thrombolysis compared with a control antibody. A similar effect was observed when the anti-factor XI antibody was administered systemically. Inhibition of TAFI activity also resulted in a twofold increase in clot lysis whereas inhibition of both factor XI and TAFI activity had no additional effect. Thus, we provide the first in vivo evidence for enhanced thrombolysis through inhibition of clotting factor XI, demonstrating a novel role for the intrinsic pathway of coagulation. Furthermore we demonstrate that inhibition of TAFI had a similar effect on thrombolysis. We postulate that inhibition of factor XI activity enhances thrombolysis because of diminished indirect activation of TAFI.

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