Tacrolimus dose requirement in pediatric liver transplantation: influence of CYP3A5 gene polymorphism

Author:

Durand Philippe1,Debray Dominique2,Kolaci Mikaela3,Bouligand Jerome4,Furlan Valérie5,Fabre Monique6,Letierce Alexia7,Verstuyft Céline3,Becquemont Laurent8

Affiliation:

1. Pediatric Intensive Care Department, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France

2. Pediatric Hepatology Department, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France

3. Pharmacology Department, University Paris-Sud, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France

4. Molecular Genetics, Pharmacogenetics & Hormonology Department, University Paris-Sud, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France

5. Pharmacy Department, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France

6. Pathology Department, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France and Pathology Department, Institute of Cancer Gustave Roussy, Villejuif, France

7. Clinical Research Unit (URC) Paris Sud, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France

8. Pharmacology Department, University Paris-Sud, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France and Clinical Research Unit (URC) Paris Sud, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, France and Clinical Research Center (CRC) Paris Sud, Assistance Publique Hôpitaux de Paris, Bicêtre Hospital, le Kremlin Bicêtre, 78, rue du Général Leclerc, Cedex, France.

Abstract

Aim: Little information is available regarding the influence of CYP3A5 genetic polymorphisms on tacrolimus dose requirement in pediatric liver transplantation. Patients & methods: We performed a retrospective study among 179 pediatric liver recipients grafted between 2002 and 2009 in order to determine the influence of donor CYP3A5 genotype along with clinical variables on tacrolimus daily dose requirement during the first weeks following transplantation. Results: Mean stable tacrolimus daily dose requirement was higher among children who received a liver expressing CYP3A5 (carrying the CYPA3A5*1 allele) compared with those with a liver that did not express CYP3A5 (CYP3A5*3/*3 genotype): 0.29 ± 0.20 vs 0.18 ± 0.13 mg.kg-1.d-1, p = 0.005, respectively. A younger recipient age and fluconazole prescription were also significantly associated with tacrolimus daily dose requirement. Time to reach stable tacrolimus therapeutic trough concentrations was prolonged among patients with a CYP3A5-expressing graft (26 vs 21 days, p = 0.04). Conclusion: Donor CYP3A5 genotype partially explains tacrolimus dose requirement. Original submitted 30 January 2013; Revision submitted 2 May 2013

Publisher

Future Medicine Ltd

Subject

Pharmacology,Genetics,Molecular Medicine

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