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Calvo PL, Serpe L, Brunati A, Nonnato A, Bongioanni D, Olio DD, Pinon M, Ferretti C, Tandoi F, Carbonaro G, Salizzoni M, Amoroso A, Romagnoli R, Canaparo R. Donor CYP3A5 genotype influences tacrolimus disposition on the first day after paediatric liver transplantation. Br J Clin Pharmacol 2017; 83:1252-1262. [PMID: 28044353 DOI: 10.1111/bcp.13219] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 12/05/2016] [Accepted: 12/18/2016] [Indexed: 12/12/2022] Open
Abstract
AIM The aim of the present study was to investigate the influence of the cytochrome P450 (CYP) 3A4/5 genotype in paediatric liver transplant recipients and donors, and the contribution of age and gender to tacrolimus disposition on the first day after transplantation. METHODS The contribution of the CYP3A4/5 genotype in paediatric liver transplant recipients and donors to the tacrolimus blood trough concentrations (C0 ) and the tacrolimus concentration/weight-adjusted dose ratio on day 1 was evaluated in 67 liver-transplanted children: 33 boys and 34 girls, mean age 4.5 years. RESULTS Donor CYP3A5 genotype appears to be significantly associated with tacrolimus disposition on the first day after liver transplantation (P < 0.0002). Other physiological factors, such as recipient age and donor gender may also play a role and lead to significant differences in tacrolimus C0 and tacrolimus concentration/weight-adjusted dose ratio on day 1. However, according to the general linear model, only recipient age appears to be independently associated with tacrolimus disposition on the first day after liver transplantation (P < 0.03). Indeed, there was a faster tacrolimus metabolism in children under 6 years of age (P < 0.02). CONCLUSIONS Donor CYP3A5 genotype, recipient age and, to a lesser extent, donor gender appear to be associated with tacrolimus disposition on day 1 after transplant. This suggests that increasing the starting tacrolimus doses in paediatric patients under 6 years of age who receive a graft from a male extensive metabolizer may enhance the possibility of their tacrolimus levels reaching the therapeutic range sooner.
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Affiliation(s)
- Pier Luigi Calvo
- Department of Pediatrics and Public Health Sciences, Division of Pediatric Gastroenterology, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Loredana Serpe
- Department of Drug Science and Technology, University of Torino, Torino, Italy
| | - Andrea Brunati
- Department of Surgical Sciences, Liver Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Antonello Nonnato
- Clinical Biochemistry Unit, A.O.U. Città della Salute e della Scienza of Torino, Torino, Italy
| | - Daniela Bongioanni
- Department of Medical Sciences, Regional Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Dominic Dell' Olio
- Department of Medical Sciences, Regional Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Michele Pinon
- Department of Pediatrics and Public Health Sciences, Division of Pediatric Gastroenterology, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Carlo Ferretti
- Department of Drug Science and Technology, University of Torino, Torino, Italy
| | - Francesco Tandoi
- Department of Surgical Sciences, Liver Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Giulia Carbonaro
- Department of Surgical Sciences, Liver Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Mauro Salizzoni
- Department of Surgical Sciences, Liver Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Antonio Amoroso
- Department of Medical Sciences, Regional Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Renato Romagnoli
- Department of Surgical Sciences, Liver Transplantation Center, A.O.U. Città della Salute e della Scienza of Torino, University of Torino, Torino, Italy
| | - Roberto Canaparo
- Department of Drug Science and Technology, University of Torino, Torino, Italy
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