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Significant Effect of Polymorphisms in CYP2D6 and ABCC2 on Clinical Outcomes of Adjuvant Tamoxifen Therapy for Breast Cancer Patients

KIYOTANI, Kazuma ; MUSHIRODA, Taisei ; AKI, Fuminori ; HIRATA, Koichi ; TAKATSUKA, Yuichi ; OKAZAKI, Minoru ; OHSUMI, Shozo ; YAMAKAWA, Takashi ; SASA, Mitsunori ; NAKAMURA, Yusuke ; ZEMBUTSU, Hitoshi ; IMAMURA, Chiyo K ; HOSONO, Naoya ; TSUNODA, Tatsuhiko ; KUBO, Michiaki ; TANIGAWARA, Yusuke ; FLOCKHART, David A ; DESTA, Zeruesenay ; SKAAR, Todd C

Journal of clinical oncology, 2010-03, Vol.28 (8), p.1287-1293 [Periódico revisado por pares]

Alexandria, VA: American Society of Clinical Oncology

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Título:
Significant Effect of Polymorphisms in CYP2D6 and ABCC2 on Clinical Outcomes of Adjuvant Tamoxifen Therapy for Breast Cancer Patients
Autor: KIYOTANI, Kazuma ; MUSHIRODA, Taisei ; AKI, Fuminori ; HIRATA, Koichi ; TAKATSUKA, Yuichi ; OKAZAKI, Minoru ; OHSUMI, Shozo ; YAMAKAWA, Takashi ; SASA, Mitsunori ; NAKAMURA, Yusuke ; ZEMBUTSU, Hitoshi ; IMAMURA, Chiyo K ; HOSONO, Naoya ; TSUNODA, Tatsuhiko ; KUBO, Michiaki ; TANIGAWARA, Yusuke ; FLOCKHART, David A ; DESTA, Zeruesenay ; SKAAR, Todd C
Assuntos: Adult ; Aged ; Aged, 80 and over ; Antineoplastic Agents, Hormonal - pharmacology ; ATP-Binding Cassette Transporters - genetics ; Biological and medical sciences ; Breast Neoplasms - diagnosis ; Breast Neoplasms - drug therapy ; Breast Neoplasms - genetics ; Chemotherapy, Adjuvant ; Cytochrome P-450 CYP2D6 - genetics ; Drug Resistance, Neoplasm - genetics ; Female ; Gynecology. Andrology. Obstetrics ; Humans ; Japan ; Mammary gland diseases ; Medical sciences ; Middle Aged ; ORIGINAL REPORTS ; Polymorphism, Single Nucleotide ; Prognosis ; Survival Analysis ; Tamoxifen - pharmacology ; Tumors
É parte de: Journal of clinical oncology, 2010-03, Vol.28 (8), p.1287-1293
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: The clinical efficacy of tamoxifen is suspected to be influenced by the activity of drug-metabolizing enzymes and transporters involved in the formation, metabolism, and elimination of its active forms. We investigated relationships of polymorphisms in transporter genes and CYP2D6 to clinical outcome of patients receiving tamoxifen. We studied 282 patients with hormone receptor-positive, invasive breast cancer receiving tamoxifen monotherapy, including 67 patients who have been previously reported. We investigated the effects of allelic variants of CYP2D6 and haplotype-tagging single nucleotide polymorphisms (tag-SNPs) of ABCB1, ABCC2, and ABCG2 on recurrence-free survival using the Kaplan-Meier method and Cox regression analysis. Plasma concentrations of tamoxifen metabolites were measured in 98 patients receiving tamoxifen 20 mg/d. CYP2D6 variants were significantly associated with shorter recurrence-free survival (P = .000036; hazard ratio [HR] = 9.52; 95% CI, 2.79 to 32.45 in patients with two variant alleles v patients without variant alleles). Among 51 tag-SNPs in transporter genes, a significant association was found at rs3740065 in ABCC2 (P = .00017; HR = 10.64; 95% CI, 1.44 to 78.88 in patients with AA v GG genotypes). The number of risk alleles of CYP2D6 and ABCC2 showed cumulative effects on recurrence-free survival (P = .000000055). Patients carrying four risk alleles had 45.25-fold higher risk compared with patients with
Editor: Alexandria, VA: American Society of Clinical Oncology
Idioma: Inglês

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Significant Effect of Polymorphisms in CYP2D6 and ABCC2 on Clinical Outcomes of Adjuvant Tamoxifen Therapy for Breast Cancer Patients

Alexandria, VA: American Society of Clinical Oncology

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