Aim: Multiple genetic variants have been associated with variation in tacrolimus (TAC) trough concentrations. Unfortunately, additional studies do not confirm these associations, leading one to question if a reported association is accurate and reliable. We attempted to validate 44 published variants associated with TAC trough concentrations. Materials & methods: Genotypes of the variants in our cohort of 1923 kidney allograft recipients were associated with TAC trough concentrations. Results: Only variants in CYP3A4 and CYP3A5 were significantly associated with variation in TAC trough concentrations in our validation. Conclusion: There is no evidence that common variants outside the CYP3A4 and CYP3A5 loci are associated with variation in TAC trough concentrations. In the future rare variants may be important and identified using DNA sequencing.
Bibliographical noteFunding Information:
This study was supported in part by NIH/NIAID grants 5U19-AI070119 and 5U01-AI058013. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed. No writing assistance was utilized in the production of this manuscript.
© 2018 2018 Future Medicine Ltd.