The effect of CYP3A5 and ABCB1 single nucleotide polymorphisms on tacrolimus dose requirements in Caucasian liver transplant patients

Natale D'Alessandro, Rosario Sanguedolce, Giuseppe Vizzini, Filippo Biondi, Manuela Labbozzetta, Ambra Provenzani, Paola Poma, Fabio Triolo, Ugo Palazzo, Giovanni Vizzini, Alessio Provenzani, Piera Polidori, Bruno Gridelli

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Abstract

Background: Tacrolimus is a substrate of cytochrome P-450 (CYP) 3A enzyme and of the drug transporter ABCBl. We have investigated the effects of possible relevant CYP3A5 and ABCBl single nucleotide polymorphisms (SNPs) present in both donors and recipients on tacrolimus blood levels achieved in a population of 32 Caucasian liver transplant patients. Material/Methods: At 1, 3 and 6 months after transplantation, tacrolimus doses (mg/kg/day) and trough blood levels (C0) were determined. Polymerase chain reaction followed by restriction fragment length polymorphism analysis was used for gen-otyping CYP3A5*3 [6986A>G] as well as ABCBl at exons 21 [2677G>T] and 26 [3435C>T]. Results:87.5% of the population showed a CYP3A5*3/*3 genotype. For the ABCBl SNPs, in the case of 3435C>T the total frequency observed for the allelic variant was 50%. For the 2677G>T, the total frequency of the allelic variant was 12.5%, lower than in other Caucasian populations and without any significant linkage with 3435C>T. At 3 and 6 months after transplantation, tacrolimus dose requirements were significantly higher in patients receiving a liver with one copy of the *1 al-lele compared to those homozygous for the *3 allele (0.111±0.057 vs. 0.057±0.030 [P<0.05] at 3 month and 0.086±0.051 vs. 0.044±0.025 [P<0.05] at 6 month). For the recipients' genotypes, the presence of at least one *1 copy tended, though not statistically significantly, to increase tacrolimus doses. With regard to the ABCBl SNPs, they did not show any influence on tacrolimus dosing requirements. Conclusions: Pharmacogenetic analysis of CYP3A5 in the donor could contribute to determine the appropriate initial dosage of tacrolimus in liver transplant patients
Original languageEnglish
Pages (from-to)23-31
Number of pages9
JournalAnnals of Transplantation
Volume14
Publication statusPublished - 2009

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Cytochrome P-450 CYP3A
Tacrolimus
Single Nucleotide Polymorphism
Transplants
Liver
Transplantation
Genotype
Tissue Donors
Population
Restriction Fragment Length Polymorphisms
Cytochrome P-450 Enzyme System
Exons
Alleles
Polymerase Chain Reaction
Pharmaceutical Preparations

All Science Journal Classification (ASJC) codes

  • Transplantation

Cite this

@article{5fc4b355a2704cd3a8de806ee1580d63,
title = "The effect of CYP3A5 and ABCB1 single nucleotide polymorphisms on tacrolimus dose requirements in Caucasian liver transplant patients",
abstract = "Background: Tacrolimus is a substrate of cytochrome P-450 (CYP) 3A enzyme and of the drug transporter ABCBl. We have investigated the effects of possible relevant CYP3A5 and ABCBl single nucleotide polymorphisms (SNPs) present in both donors and recipients on tacrolimus blood levels achieved in a population of 32 Caucasian liver transplant patients. Material/Methods: At 1, 3 and 6 months after transplantation, tacrolimus doses (mg/kg/day) and trough blood levels (C0) were determined. Polymerase chain reaction followed by restriction fragment length polymorphism analysis was used for gen-otyping CYP3A5*3 [6986A>G] as well as ABCBl at exons 21 [2677G>T] and 26 [3435C>T]. Results:87.5{\%} of the population showed a CYP3A5*3/*3 genotype. For the ABCBl SNPs, in the case of 3435C>T the total frequency observed for the allelic variant was 50{\%}. For the 2677G>T, the total frequency of the allelic variant was 12.5{\%}, lower than in other Caucasian populations and without any significant linkage with 3435C>T. At 3 and 6 months after transplantation, tacrolimus dose requirements were significantly higher in patients receiving a liver with one copy of the *1 al-lele compared to those homozygous for the *3 allele (0.111±0.057 vs. 0.057±0.030 [P<0.05] at 3 month and 0.086±0.051 vs. 0.044±0.025 [P<0.05] at 6 month). For the recipients' genotypes, the presence of at least one *1 copy tended, though not statistically significantly, to increase tacrolimus doses. With regard to the ABCBl SNPs, they did not show any influence on tacrolimus dosing requirements. Conclusions: Pharmacogenetic analysis of CYP3A5 in the donor could contribute to determine the appropriate initial dosage of tacrolimus in liver transplant patients",
author = "Natale D'Alessandro and Rosario Sanguedolce and Giuseppe Vizzini and Filippo Biondi and Manuela Labbozzetta and Ambra Provenzani and Paola Poma and Fabio Triolo and Ugo Palazzo and Giovanni Vizzini and Alessio Provenzani and Piera Polidori and Bruno Gridelli",
year = "2009",
language = "English",
volume = "14",
pages = "23--31",
journal = "Annals of Transplantation",
issn = "1425-9524",
publisher = "International Scientific Information, Inc.",

}

TY - JOUR

T1 - The effect of CYP3A5 and ABCB1 single nucleotide polymorphisms on tacrolimus dose requirements in Caucasian liver transplant patients

AU - D'Alessandro, Natale

AU - Sanguedolce, Rosario

AU - Vizzini, Giuseppe

AU - Biondi, Filippo

AU - Labbozzetta, Manuela

AU - Provenzani, Ambra

AU - Poma, Paola

AU - Triolo, Fabio

AU - Palazzo, Ugo

AU - Vizzini, Giovanni

AU - Provenzani, Alessio

AU - Polidori, Piera

AU - Gridelli, Bruno

PY - 2009

Y1 - 2009

N2 - Background: Tacrolimus is a substrate of cytochrome P-450 (CYP) 3A enzyme and of the drug transporter ABCBl. We have investigated the effects of possible relevant CYP3A5 and ABCBl single nucleotide polymorphisms (SNPs) present in both donors and recipients on tacrolimus blood levels achieved in a population of 32 Caucasian liver transplant patients. Material/Methods: At 1, 3 and 6 months after transplantation, tacrolimus doses (mg/kg/day) and trough blood levels (C0) were determined. Polymerase chain reaction followed by restriction fragment length polymorphism analysis was used for gen-otyping CYP3A5*3 [6986A>G] as well as ABCBl at exons 21 [2677G>T] and 26 [3435C>T]. Results:87.5% of the population showed a CYP3A5*3/*3 genotype. For the ABCBl SNPs, in the case of 3435C>T the total frequency observed for the allelic variant was 50%. For the 2677G>T, the total frequency of the allelic variant was 12.5%, lower than in other Caucasian populations and without any significant linkage with 3435C>T. At 3 and 6 months after transplantation, tacrolimus dose requirements were significantly higher in patients receiving a liver with one copy of the *1 al-lele compared to those homozygous for the *3 allele (0.111±0.057 vs. 0.057±0.030 [P<0.05] at 3 month and 0.086±0.051 vs. 0.044±0.025 [P<0.05] at 6 month). For the recipients' genotypes, the presence of at least one *1 copy tended, though not statistically significantly, to increase tacrolimus doses. With regard to the ABCBl SNPs, they did not show any influence on tacrolimus dosing requirements. Conclusions: Pharmacogenetic analysis of CYP3A5 in the donor could contribute to determine the appropriate initial dosage of tacrolimus in liver transplant patients

AB - Background: Tacrolimus is a substrate of cytochrome P-450 (CYP) 3A enzyme and of the drug transporter ABCBl. We have investigated the effects of possible relevant CYP3A5 and ABCBl single nucleotide polymorphisms (SNPs) present in both donors and recipients on tacrolimus blood levels achieved in a population of 32 Caucasian liver transplant patients. Material/Methods: At 1, 3 and 6 months after transplantation, tacrolimus doses (mg/kg/day) and trough blood levels (C0) were determined. Polymerase chain reaction followed by restriction fragment length polymorphism analysis was used for gen-otyping CYP3A5*3 [6986A>G] as well as ABCBl at exons 21 [2677G>T] and 26 [3435C>T]. Results:87.5% of the population showed a CYP3A5*3/*3 genotype. For the ABCBl SNPs, in the case of 3435C>T the total frequency observed for the allelic variant was 50%. For the 2677G>T, the total frequency of the allelic variant was 12.5%, lower than in other Caucasian populations and without any significant linkage with 3435C>T. At 3 and 6 months after transplantation, tacrolimus dose requirements were significantly higher in patients receiving a liver with one copy of the *1 al-lele compared to those homozygous for the *3 allele (0.111±0.057 vs. 0.057±0.030 [P<0.05] at 3 month and 0.086±0.051 vs. 0.044±0.025 [P<0.05] at 6 month). For the recipients' genotypes, the presence of at least one *1 copy tended, though not statistically significantly, to increase tacrolimus doses. With regard to the ABCBl SNPs, they did not show any influence on tacrolimus dosing requirements. Conclusions: Pharmacogenetic analysis of CYP3A5 in the donor could contribute to determine the appropriate initial dosage of tacrolimus in liver transplant patients

UR - http://hdl.handle.net/10447/34105

M3 - Article

VL - 14

SP - 23

EP - 31

JO - Annals of Transplantation

JF - Annals of Transplantation

SN - 1425-9524

ER -