Effect of CYP3A4, CYP3A5, ABCB1 Gene Polymorphisms on Rivaroxaban Pharmacokinetics in Patients Undergoing Total Hip and Knee Replacement Surgery

Introduction Population ageing in developed countries will inevitably increase the need for knee and hip replacement surgery. Over the years, direct oral anticoagulants, such as rivaroxaban, have been widely used for thromboprophylaxis in patients undergoing knee and hip replacement surgery. The study of pharmacogenetic characteristics of rivaroxaban is important for enhancing the effectiveness and safety of rivaroxaban thromboprophylaxis. Aim Evaluation of CYP3A4 , CYP3A5 and ABCB1 gene polymorphisms influence on rivaroxaban pharmacokinetics and prothrombin time dynamics in patients undergoing total hip and knee replacement surgery. Methods The study included 78 patients undergoing total hip and knee replacement surgery. The patients received 10 mg of rivaroxaban once a day. Genotyping of polymorphisms ABCB1 rs1045642, ABCB1 rs4148738, CYP3A4 rs35599367 and CYP3A5 rs776746 was performed. Peak steady-state and trough steady-state rivaroxaban concentrations were determined. Prothrombin time was also evaluated. Results The study revealed the following haplotypes: (1) ABCB1 rs1045642— CYP3A4 rs35599367 and (2) ABCB1 rs4148738— CYP3A4 rs35599367. The analysis of the peak steady-state rivaroxaban concentration between mutant haplotypes and wild haplotypes revealed no significant differences. However, there was a statistically significant average correlation between peak steady-state rivaroxaban concentration and prothrombin time (r = 0.421; r 2 = 0.178; p