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Dadun > Depósito Académico > Clínica Universidad de Navarra > Oncología médica > DA - CUN - Oncología médica - Artículos de revista >

Oxaliplatin, irinotecan and capecitabine as first-line therapy in metastatic colorectal cancer (mCRC): a dose-finding study and pharmacogenomic analysis
Authors: Zarate, R. (Ruth)
Rodriguez, J. (Javier)
Bandres, E. (Eva)
Patiño, A. (Ana)
Ponz-Sarvise, M. (Mariano)
Viudez, A. (A.)
Ramirez, N. (Natalia)
Bitarte, N. (Nerea)
Chopitea, A. (Ana)
Garcia-Foncillas, J. (Jesús)
Keywords: Antineoplastic Combined Chemotherapy Protocols/administration & dosage/adverse effects
Glutathione S-Transferase pi/genetics
Neoplasm Metastasis
Issue Date: 2010
Publisher: Nature
Publisher version: http://www.nature.com/bjc/journal/v102/n6/pdf/6605595a.pdf
ISSN: 0007-0920
Citation: Zarate R, Rodriguez J, Bandres E, Patino-Garcia A, Ponz-Sarvise M, Viudez A, et al. Oxaliplatin, irinotecan and capecitabine as first-line therapy in metastatic colorectal cancer (mCRC): a dose-finding study and pharmacogenomic analysis. Br J Cancer 2010 Mar 16;102(6):987-994.
Abstract
A dose-finding study was performed to evaluate the dose-limiting toxicity (DLT), maximum-tolerated dose (MTD) and the recommended dose (RD) of escalating the doses of capecitabine and fixed doses of irinotecan and oxaliplatin on a biweekly schedule for metastatic colorectal cancer patients (mCRC). A pharmacogenomic analysis was performed to investigate the association between SNPs and treatment outcome. METHODS: Eighty-seven chemotherapy-naive mCRC patients were recruited through a two-step study design; 27 were included in the dose-finding study and 60 in the pharmacogenomic analysis. Oxaliplatin (85 mg m(-2)) and CPT-11 (150 mg m(-2)), both on day 1, and capecitabine doses ranging from 850 to 1500 mg m(-2) bid on days 1-7 were explored. Peripheral blood samples were used to genotype 13 SNPs in 10 genes related to drug metabolism or efficacy. Univariate and multivariate Cox analysis was performed to examine associations between SNPs, ORR and PFS. RESULTS: The capecitabine RD was 1000 mg m(-2) bid. Diarrhoea and neutropenia were the DLTs. After a median follow-up of 52.5 months, the median PFS and OS were 12 (95% CI; 10.6-13.4) and 27 months (95% CI; 17.2-36.8), respectively.The GSTP1-G genotype, the Kohne low-risk category and use of a consolidation approach strongly correlated with decreased risk of progression. Patients with all favourable variables showed a median PFS of 42 months vs 3.4 months in the group with all adverse factors. A superior clinical response was obtained in patients with one GSTP1-G allele as compared with GSTP1-AA carriers (P=0.004). CONCLUSION: First-line therapy with oxaliplatin, irinotecan and capecitabine is efficient and well-tolerated. The GSTP1 polymorphism A>G status was significantly associated with ORR and PFS in mCRC treated with this triplet therapy.
Permanent link: http://hdl.handle.net/10171/22738
Appears in Collections:DA - CUN - Oncología médica - Artículos de revista

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