Impact of CYP2D6, CYP3A5, CYP2C9 and CYP2C19 polymorphisms on tamoxifen pharmacokinetics in Asian breast cancer patients
Article first published online: 11 APR 2011
DOI: 10.1111/j.1365-2125.2011.03905.x
© 2011 The Authors. British Journal of Clinical Pharmacology © 2011 The British Pharmacological Society
Issue

British Journal of Clinical Pharmacology
Special Issue: Drug allergy: themed section
Volume 71, Issue 5, pages 737–750, May 2011
Additional Information
How to Cite
Lim, J. S. L., Chen, X. A., Singh, O., Yap, Y. S., Ng, R. C. H., Wong, N. S., Wong, M., Lee, E. J. D. and Chowbay, B. (2011), Impact of CYP2D6, CYP3A5, CYP2C9 and CYP2C19 polymorphisms on tamoxifen pharmacokinetics in Asian breast cancer patients. British Journal of Clinical Pharmacology, 71: 737–750. doi: 10.1111/j.1365-2125.2011.03905.x
Publication History
- Issue published online: 11 APR 2011
- Article first published online: 11 APR 2011
- Accepted manuscript online: 11 JAN 2011 09:40AM EST
- Received , 21 September 2010, Accepted , 29 December 2010, Accepted Article , 11 January 2011
REFERENCES
- 1
- 2, , , , , , , , . Pharmacological characterization of 4-hydroxy-N-desmethyl tamoxifen, a novel active metabolite of tamoxifen. Breast Cancer Res Treat 2004; 85: 151–9.
- 3, , , , , , , , . Active tamoxifen metabolite plasma concentrations after coadministration of tamoxifen and the selective serotonin reuptake inhibitor paroxetine. J Natl Cancer Inst 2003; 95: 1758–64.
- 4, , , . Variable contribution of cytochromes P450 2D6, 2C9 and 3A4 to the 4-hydroxylation of tamoxifen by human liver microsomes. Biochem Pharmacol 1997; 53: 171–8.
- 5, , , , , , , , . Breast cancer treatment outcome with adjuvant tamoxifen relative to patient CYP2D6 and CYP2C19 genotypes. J Clin Oncol 2007; 25: 5187–93.
- 6, , , , , , , , , , , , . Pharmacogenetics of tamoxifen biotransformation is associated with clinical outcomes of efficacy and hot flushes. J Clin Oncol 2005; 23: 9312–8.
- 7, , , , , , , , , , , , , , , , , , , , , . Association between CYP2D6 polymorphisms and outcomes among women with early stage breast cancer treated with tamoxifen. JAMA 2009; 302: 1429–36.
- 8, , , , , , , , , , , , , , , , , . American Society of Clinical Oncology Clinical Practice Guideline: Update on adjuvant endocrine therapy for women with hormone receptor-positive breast cancer. J Clin Oncol 2010; 28: 3784–96.
- 9, , , , , , , , , , , , , , , , , , . CYP2D6 genotype, antidepressant use, and tamoxifen metabolism during adjuvant breast cancer treatment. J Natl Cancer Inst 2005; 97: 30–9.
- 10. CYP2D6 allele frequency in European Caucasians, Asians, Africans and their descendants. Pharmacogenomics 2002; 3: 229–43.
- 11, , , , , , . Identification of the primary gene defect at the cytochrome P450 CYP2D locus. Nature 1990; 347: 773–6.
- 12, , , . The human CYP2D locus associated with a common genetic defect in drug oxidation: a G1934 – a base change in intron 3 of a mutant CYP2D6 allele results in an aberrant 3′ splice recognition site. Am J Hum Genet 1990; 47: 994–1001.
- 13, , , , , , , , , , , , , . Quantitative effect of CYP2D6 genotype and inhibitors on tamoxifen metabolism: implication for optimization of breast cancer treatment. Clin Pharmacol Ther 2006; 80: 61–74.
- 14, , , , , , , , . Effects of CYP2D6 and SULT1A1 genotypes including SULT1A1 gene copy number on tamoxifen metabolism. Ann Oncol 2008; 19: 56–61.
- 15, , , , , . Pharmacogenetic variation at CYP2C9, CYP2C19, and CYP2D6 at global and microgeographic scales. Pharmacogenet Genomics 2009; 19: 170–9.
- 16, , , , . Deletion of the entire cytochrome P450 CYP2D6 gene as a cause of impaired drug metabolism in poor metabolizers of the debrisoquine/sparteine polymorphism. Am J Hum Genet 1991; 48: 943–50.
- 17, , , , , , , , , , , , , , , , , , , , . Pharmacokinetics/genotype associations for major cytochrome P450 enzymes in native and first- and third-generation Japanese populations: comparison with Korean, Chinese, and Caucasian populations. Clin Pharmacol Ther 2008; 84: 347–61.
- 18, , , , . Molecular basis of genetic variation in debrisoquine hydroxylation in Chinese subjects: polymorphism in RFLP and DNA sequence of CYP2D6. Clin Pharmacol Ther 1993; 53: 410–8.
- 19, , , , , . Clinical implications of CYP2D6 genotypes predictive of tamoxifen pharmacokinetics in metastatic breast cancer. J Clin Oncol 2007; 25: 3837–45.
- 20, , , , . Metabolism of tamoxifen by recombinant human cytochrome P450 enzymes: formation of the 4-hydroxy, 4′-hydroxy and N-desmethyl metabolites and isomerization of trans-4-hydroxytamoxifen. Drug Metab Dispos 2002; 30: 869–74.
- 21, , , , , , , , , , , , , , , , , , . Sequence diversity in CYP3A promoters and characterization of the genetic basis of polymorphic CYP3A5 expression. Nat Genet 2001; 27: 383–91.
- 22, , . Polymorphic human cytochrome P450 enzymes: an opportunity for individualized drug treatment. Trends Pharmacol Sci 1999; 20: 342–9.
- 23, , , . CYP3A5*3 and *6 single nucleotide polymorphisms in three distinct Asian populations. Eur J Clin Pharmacol 2003; 59: 123–6.
- 24, , , , , , . CYP3A5 genetic polymorphisms in different ethnic populations. Drug Metab Dispos 2005; 33: 884–7.
- 25, , , , . CYP3A5 phenotype-genotype correlations in a British population. Br J Clin Pharmacol 2003; 55: 625–9.
- 26, , , , . Quantification of tamoxifen and three metabolites in plasma by high-performance liquid chromatography with fluorescence detection: application to a clinical trial. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 791: 245–53.
- 27, , , , . Optimizing high-performance liquid chromatography method with fluorescence detection for quantification of tamoxifen and two metabolites in human plasma: application to a clinical study. J Pharm Biomed Anal 2008; 46: 349–55.
- 28, , , , , , , , , , , , , . Association between CYP2D6 *10 genotype and survival of breast cancer patients receiving tamoxifen treatment. Ann Oncol 2008; 19: 1423–9.
- 29, , , , , , , . CYP2D6 polymorphisms as predictors of outcome in breast cancer patients treated with tamoxifen: expanded polymorphism coverage improves risk stratification. Clin Cancer Res 2010; 16: 4468–77.
- 30, , , , , . Polymorphisms in cytochrome P4503A5 (CYP3A5) may be associated with race and tumor characteristics, but not metabolism and side effects of tamoxifen in breast cancer patients. Cancer Lett 2005; 217: 61–72.
- 31, , , , . Pharmacogenetics of CYP2C19: functional and clinical implications of a new variant CYP2C19*17. Br J Clin Pharmacol 2010; 69: 222–30.

1365-2125/asset/olbannerleft.gif?v=1&s=e86b92cac3efbbd2e255b9fa97ece9623eac0b54)
1365-2125/asset/olbannerright.gif?v=1&s=6a7c47d290382bf3bc40c62461bc36a371a081bf)