Tacrolimus pharmacogenetics: the CYP3A5*1 allele predicts low dose-normalized tacrolimus blood concentrations in whites and South Asians.

Abstract:

:Previously, we demonstrated that the dose-normalized tacrolimus blood concentration after renal transplantation was associated with a single nucleotide polymorphism (SNP) in the CYP3AP1 gene, probably through linkage with an SNP in the CYP3A5 gene. Individuals with at least one CYP3A5*1 allele synthesize CYP3A5 and CYP3A5*3/*3 homozygotes do not. We now present results with direct typing of the CYP3A5 genotype for this group of 180 kidney-only transplant recipients from a single center. South Asian and white patients with at least one CYP3A5*1 allele achieved twofold lower dose-normalized tacrolimus blood concentrations compared with CYP3A5*3/*3 homozygotes, confirming our previous findings for the CYP3AP1 SNP. There was a significant delay in achieving target blood concentrations in those with at least one CYP3A5*1 allele. Determination of the CYP3A5*1/*3 genotype could be used to predict the tacrolimus dose requirement and, given incomplete linkage, would be better than determination of the CYP3AP1 genotype.

journal_name

Transplantation

journal_title

Transplantation

authors

Macphee IA,Fredericks S,Mohamed M,Moreton M,Carter ND,Johnston A,Goldberg L,Holt DW

doi

10.1097/01.tp.0000151766.73249.12

subject

Has Abstract

pub_date

2005-02-27 00:00:00

pages

499-502

issue

4

eissn

0041-1337

issn

1534-6080

pii

00007890-200502270-00019

journal_volume

79

pub_type

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