Journal
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY
Volume 78, Issue 6, Pages 625-631Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jacc.2021.06.010
Keywords
anticoagulation; factor XI; hemostasis; thrombosis
Categories
Funding
- Anthos Therapeutics
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Hemostasis and thrombosis are closely linked, with factor XI inhibitors potentially providing a safer alternative to current anticoagulants. Clinical studies are ongoing to determine the efficacy of factor XI inhibitors in attenuating thrombosis without disrupting hemostasis.
Hemostasis and thrombosis are believed to be so intricately linked that any strategies that reduce thrombosis will have an inevitable impact on hemostasis. Consequently, bleeding is viewed as an unavoidable side effect of anticoagulant therapy. Emerging evidence suggests that factor XI is important for thrombosis but has a minor role in hemostasis. This information raises the possibility that anticoagulants that target factor XI will be safer than currently available agents. The authors provide a visual representation of the coagulation pathways that distinguishes between the steps involved in thrombosis and hemostasis to explain why factor XI inhibitors may serve as hemostasis-sparing anticoagulants. A safer class of anticoagulants would provide opportunities for treatment of a wider range of patients, including those at high risk for bleeding. Ongoing clinical studies will determine the extent to which factor XI inhibitors attenuate thrombosis without disruption of hemostasis. (C) 2021 by the American College of Cardiology Foundation.
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