Key result
Dabigatran loses anticoagulant activity at higher tissue factor concentrations, whereas warfarin maintains consistent anticoagulation.
Why the study?
The influence of cell-associated tissue factor concentration on the anticoagulant activity of dabigatran and its relation to reduced intracranial bleeding incidence was unclear.
Does tissue factor concentration influence the anticoagulant activity of dabigatran differently than warfarin in plasma from patients with atrial fibrillation?
Does tissue factor concentration influence the anticoagulant activity of dabigatran differently than warfarin in plasma from patients with atrial fibrillation?
Dabigatran's anticoagulant efficacy is inversely proportional to local tissue factor concentration, offering a mechanistic explanation for its reduced intracranial bleeding risk and potential differences in thrombotic events compared to warfarin.
Variable dabigatran effect by tissue factor warrants caution in high-TF states; leaves open relevance to AF bleeding or thrombosis.
Influence of cell-associated tissue factor concentration on the anticoagulant activity of dabigatran. A possible explanation for the reduced incidence of intracranial bleeding AMMOLLO, CONCETTA TIZIANA ; ZACCARIA, FEDERICA; Visino, Fabrizio; Testa, Sophie; SEMERARO, Nicola ; COLUCCI, Mario 2015-01-01 Abstract NA
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Ammollo et al. (2014) studied Atrial fibrillation (n=18). Dabigatran vs. Warfarin was evaluated on Anticoagulant activity (clotting time ratio vs control) across varying tissue factor concentrations. The anticoagulant activity of dabigatran decreased with increasing tissue factor concentration, whereas warfarin maintained a consistent anticoagulant effect regardless of tissue factor levels.
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