Lack of Relationship Between Renal Function and Genetic Variants of CYP3A4, CYP3A5, MDR1, MRP2, UGT1A9, UGT1A8, and UGT2B7 in Patients After Liver Transplantation in a 2-Year Follow-up.

Background. The prolonged survival time after liver transplantation (LTX) creates the possibility of the occurrence and development of complications in the late post-transplantation period. Deterioration of renal function is 1 of these complications. The nephrotoxicity of calcineurin inhibitors (CNIs) and their metabolites produced during pharmacokinetic processes in the body is also postulated. The study was aimed at assessment of the relationship between selected single gene polymorphisms (SNPs) for enzymes and transport proteins and change of estimated glomerular filtration rate (Delta eGFR) during 2-year follow-up in LTX patients. Methods. The study involved 244 patients after LTX (105 women [43.0%] and 139 men [57.0%]) receiving tacrolimus (191; 78.3%) or cyclosporine A (53; 21.7%). The study protocol conforms with the Declaration of Helsinki. Results. We have not observed significant differences of eGFR between groups distinguished based on analyzed genotypes in patients treated with cyclosporine or tacrolimus. Conclusion. Genetic variations of CYP3A4, CYP3A5, MDR1, MRP2, UGT1A9, UGT2B7, and UGT2B7 tested in LTX recipients are not associated with kidney function during the 24-month follow-up.