Key result
Pharmacogenetic testing for personalized warfarin dosing decreased the frequency of excessive anticoagulation and bleeding by factors of 3 and 4.5, respectively, and minimized hospitalizations by 43%.
Why the study?
Does molecular genetic testing for individual dose adjustment of warfarin improve therapeutic effect and reduce bleeding risk in patients requiring anticoagulation?
Does molecular genetic testing for individual dose adjustment of warfarin improve therapeutic effect and reduce bleeding risk in patients requiring anticoagulation?
Incorporating molecular genetic testing of key drug metabolism genes into the diagnostic algorithm can personalize warfarin dosing, potentially reducing bleeding risks and improving therapeutic efficacy.
Indirect anticoagulants such as warfarin are the 'gold standard' for prevention and treatment of thromboembolic complications in patients at risk (in atrial fibrillation of valvular and nonvalvular etiology, the presence of artificial heart valves, orthopedic and trauma interventions, and other pathological conditions). A wide range of doses required to achieve a therapeutic effect indicates the need for a personalized approach to the appointment of warfarin. In addition to the dependence on the patient's clinical characteristics (sex, age, smoking status, diagnosis), there is a clear association between the warfarin dose and the carriage of certain allelic variants of key genes that makes it possible to apply molecular genetic testing for individual dose adjustment. This provides a more rapid target anticoagulant effect and also reduces the risk of bleeding associated with a possible overdose of warfarin. Implementation of this approach will allow more wide and safe application of indirect anticoagulants in Russia for needy patients.
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Belozerceva et al. (2012) conducted a review in Thromboembolic complications requiring warfarin therapy. Pharmacogenetic-guided warfarin dosing vs. Standard clinical dosing was evaluated. Pharmacogenetic testing for personalized warfarin dosing decreased the frequency of excessive anticoagulation and bleeding by factors of 3 and 4.5, respectively, and minimized hospitalizations by 43%.
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