Influence of donor and recipient genotypes on CYP2D6 phenotype after liver transplantation: a study of mutations CYP2D6*3 and CYP2D6*4.

Abstract:

OBJECTIVE:After liver transplantation (LT), genotypic differences between the recipient and the transplanted liver, medications and post-LT complications may all affect drug metabolism. We have studied the effect of two CYP2D6 mutations in the donor and the recipient on post-LT CYP2D6 phenotype. METHOD:The CYP2D6 phenotype was assessed in 48 patients before and after LT with debrisoquine or dextromethorphan. CYP2D6*3 (CYP2D6A) and CYP2D6*4 (CYP2D6B) mutations were detected in the donor and the recipient using polymerase chain reaction. RESULTS:Before LT, 40 subjects were classified as extensive metabolisers (EM) and 8 as poor metabolisers (PM); after transplantation, 41 were EMs and 7 were PMs. Genotype and phenotype were in agreement in 100% of EMs and 40% of PMs. The low percentage of agreement in PMs could not be explained by severely altered liver function. The phenotype of 13 subjects was apparently changed by LT: 6 EMs became PMs and 7 PMs became EMs. All four subjects in whom genotype changed following LT had a corresponding change in phenotype: two EM subjects became PMs and two PM subjects became EMs. CONCLUSION:The low percentage of agreement in PMs may be partly explained by mutations other than CYP2D6*3 and CYP2D6*4. Nevertheless, our study shows that the CYP2D6 genotype of the donor controls the phenotype of the recipient of a liver transplantation.

journal_name

Eur J Clin Pharmacol

authors

Monek O,Paintaud G,Bechtel Y,Miguet JP,Mantion G,Bechtel PR

doi

10.1007/s002280050419

subject

Has Abstract

pub_date

1998-03-01 00:00:00

pages

47-52

issue

1

eissn

0031-6970

issn

1432-1041

journal_volume

54

pub_type

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