Abstract
Ischemic stroke is a devastating disease which, in most cases, is caused by thrombotic occlusion of brain arteries. The molecular mechanisms involved in microvascular thrombus formation during focal cerebral ischemia are not well understood. As a consequence, the current antithrombotic drugs used to treat acute stroke or prevent stroke recurrence either show limited efficacy or put patients at risk for serious bleeding complications. The serine protease blood coagulation factor XII (FXII) initiates the intrinsic pathway of coagulation which, together with the extrinsic pathway, culminates in the formation of fibrin. A physiological function of FXII in clot formation and hemostasis in vivo has been questioned for more than 50 years. This was mainly due to the fact that hereditary FXII deficiency does not induce any bleeding phenotype in humans. However, recent studies in transgenic mice challenged this concept by demonstrating that FXII deficiency prevents pathological thrombus formation, but does not affect regular hemostasis. These findings entailed investigations in relevant disease models of thromboembolism including ischemic stroke. The present review summarizes the pathophysiological role of FXII in experimental cerebral ischemia and highlights novel therapeutic strategies based on FXII inhibition.
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Acknowledgments
Parts of the work summarized in this review were supported by the German Research Council (Deutsche Forschungsgemeinschaft SFB 688, TP B1 to BN, GS and TP A13 to CK), by CSL Behring GmbH, Marburg, Germany. MP holds a postdoctoral fellowship granted by the Medical Faculty of the University of Heidelberg, Germany.
Conflict of interest
CK, BN, and GS hold or have applied for patents to prevent or treat thromboembolic diseases including stroke with novel antithrombotics. CK receives financial support for research projects from CSL Behring GmbH, Marburg, Germany. MP and MB did not declare any conflicts of interest.
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Pham, M., Stoll, G., Nieswandt, B. et al. Blood coagulation factor XII—a neglected player in stroke pathophysiology. J Mol Med 90, 119–126 (2012). https://doi.org/10.1007/s00109-011-0812-9
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DOI: https://doi.org/10.1007/s00109-011-0812-9