Efficacy of tamoxifen based on cytochrome P450 2D6, CYP2C19 and SULT1A1 genotype in the Italian Tamoxifen Prevention Trial

The role of pharmacogenomics and tamoxifen was investigated by analyzing several polymorphisms of cytochrome P450 and SULT1A1 gene in a nested case control study from the Italian Tamoxifen Prevention Trial. This study included 182 Caucasian subjects, 47 breast cancer (BC) cases and 135 matched contr...

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Veröffentlicht in:The pharmacogenomics journal 2011-04, Vol.11 (2), p.100-107
Hauptverfasser: Serrano, D, Lazzeroni, M, Zambon, C-F, Macis, D, Maisonneuve, P, Johansson, H, Guerrieri-Gonzaga, A, Plebani, M, Basso, D, Gjerde, J, Mellgren, G, Rotmensz, N, Decensi, A, Bonanni, B
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container_end_page 107
container_issue 2
container_start_page 100
container_title The pharmacogenomics journal
container_volume 11
creator Serrano, D
Lazzeroni, M
Zambon, C-F
Macis, D
Maisonneuve, P
Johansson, H
Guerrieri-Gonzaga, A
Plebani, M
Basso, D
Gjerde, J
Mellgren, G
Rotmensz, N
Decensi, A
Bonanni, B
description The role of pharmacogenomics and tamoxifen was investigated by analyzing several polymorphisms of cytochrome P450 and SULT1A1 gene in a nested case control study from the Italian Tamoxifen Prevention Trial. This study included 182 Caucasian subjects, 47 breast cancer (BC) cases and 135 matched controls. We used the AmpliChip CYP450 Test to screen 33 alleles of CYP2D6 and 3 of CYP2C19. One more variant for CYP2C19 * 17 and two single-nucleotide polymorphisms for the gene SULT1A1 were also performed. By using the AmpliChip CYP450 Test, out of 182 subjects, we identified 8 poor metabolizer (PM), 17 intermediate metabolizer (IM), 151 extensive metabolizer (EM) and 3 ultrarapid metabolizer (UM). PM women allocated to the tamoxifen arm showed a higher risk of developing BC compared to the remaining phenotypes ( P =0.035). In an exploratory analysis, among 58 women with a CYP2D6 * 2A allele, 9 BCs were diagnosed in the placebo arm and only 1 in the tamoxifen arm ( P =0.0001). CYP2C19 and SULT1A1 polymorphisms did not show any correlation with tamoxifen efficacy. Tamoxifen showed reduced efficacy in CYP2D6 PMs in the chemoprevention setting. Conversely, the CYP2D6 * 2A allele may be associated with increased efficacy of tamoxifen. These findings support the relevance of pharmaco-genomics in tailoring tamoxifen treatment.
doi_str_mv 10.1038/tpj.2010.17
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subjects 631/92/436/108
692/699/67/1347
692/699/67/1857
692/700/565/1436/434
Alleles
Antineoplastic Agents, Hormonal - therapeutic use
Aryl Hydrocarbon Hydroxylases - genetics
Arylsulfotransferase - genetics
Biomedical and Life Sciences
Biomedicine
Breast cancer
Breast Neoplasms - prevention & control
Care and treatment
Case-Control Studies
Clinical Trials as Topic
Complications and side effects
CYP2D6 protein
Cytochrome
Cytochrome P-450
Cytochrome P-450 CYP2C19
Cytochrome P-450 CYP2D6 - genetics
Cytochrome P450
Drug Resistance, Neoplasm - genetics
Female
Gene Expression
Health aspects
Human Genetics
Humans
Italy
Middle Aged
Oncology
original-article
Pharmacogenomics
Pharmacotherapy
Phenotypes
Polymorphism, Single Nucleotide
Prevention
Psychopharmacology
Risk factors
Single nucleotide polymorphisms
Single-nucleotide polymorphism
Tamoxifen
Tamoxifen - therapeutic use
Treatment Outcome
title Efficacy of tamoxifen based on cytochrome P450 2D6, CYP2C19 and SULT1A1 genotype in the Italian Tamoxifen Prevention Trial
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