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Related Experiment Video

Updated: Mar 30, 2026

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A hypothesis about how to achieve anticoagulation without bleeding.

Arnold E Eggers1

  • 1SUNY-Downstate Medical Center, 450 Clarkson Ave., Brooklyn, NY 11203, United States; Kings County Hospital, 451 Clarkson Ave., Brooklyn, NY 11203, United States.

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|November 4, 2015
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Summary

Epinephrine-activated platelets may trigger thrombosis by initiating the intrinsic coagulation cascade via factor XII. Targeting this pathway offers a novel anticoagulation strategy with potentially reduced bleeding risks compared to current treatments.

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Area of Science:

  • Hematology
  • Cardiovascular Medicine
  • Pharmacology

Background:

  • A prothrombotic state, leading to conditions like atrial fibrillation and deep vein thrombosis, remains a significant clinical challenge.
  • Current anticoagulants targeting the extrinsic pathway carry a substantial risk of bleeding, limiting their use.
  • The precise mechanisms initiating spontaneous thrombosis, particularly non-injury related events, require further elucidation.

Purpose of the Study:

  • To propose a novel hypothesis for the initiation of the intrinsic coagulation cascade in prothrombotic states.
  • To identify key molecular targets within this proposed pathway for potential therapeutic intervention.
  • To explore the potential of targeting this pathway for effective anticoagulation with a reduced bleeding risk.

Main Methods:

  • The study is primarily a hypothesis-driven theoretical investigation.
  • It involves analyzing the proposed interactions between epinephrine-activated platelets, factor XII, and the intrinsic coagulation cascade.
  • It considers the role of stasis in enhancing this pathway and its implications in various thrombotic conditions.

Main Results:

  • The hypothesis posits that epinephrine-activated platelets bind factor XII, initiating the intrinsic coagulation cascade.
  • This pathway is proposed to underlie spontaneous thrombosis in conditions such as atrial fibrillation and deep vein thrombosis/pulmonary embolism.
  • Stasis is identified as a factor that enhances this prothrombotic pathway.

Conclusions:

  • Targeting factor XII, its platelet receptor, or the α2-adrenoceptor on platelets could offer a new anticoagulation approach.
  • This strategy may provide effective anticoagulation for various indications while mitigating the bleeding risks associated with extrinsic pathway inhibition.
  • Thrombotic stroke is identified as a potential clinical indication for this novel therapeutic strategy.