Journal of Clinical Oncology, Vol 22, No 11 (June 1), 2004: pp. 2084-2091
© 2004 American Society of Clinical Oncology.
DOI: 10.1200/JCO.2004.11.069
XELOX (Capecitabine Plus Oxaliplatin): Active First-Line Therapy for Patients With Metastatic Colorectal Cancer
Jim Cassidy,
Josep Tabernero,
Chris Twelves,
René Brunet,
Charles Butts,
Thierry Conroy,
Filippo Debraud,
Arie Figer,
Johannes Grossmann,
Noriaki Sawada,
Patrick Schöffski,
Alberto Sobrero,
Eric Van Cutsem,
Eduardo Díaz-Rubio
From the Department of Medicine and Therapeutics, Aberdeen; Beatson Oncology Centre, Glasgow; University of Leeds and Tom Connors Cancer Research Centre, Bradford, United Kingdom; Hospital Vall d'Hebrón University Hospital, Barcelona; Hospital Clínico San Carlos Servicio de Oncología, Madrid, Spain; Institut Bergonie, Bordeaux; Centre Alexis Vautrin, Nancy, France; Cross Cancer Institute, Edmonton, Canada; European Institute of Oncology, Milan; Clinica Oncologica, Udine, Italy; Sourasky Medical Center, Tel-Aviv, Israel; Universität Regensburg; Medizinische Hochschule Hannover, Germany; Chugai Pharmaceutical Company Limited, Kamakura, Japan, and University Hospital Gasthuisberg, Leuven, Belgium.
Address reprint requests to Jim Cassidy, MD, CRC Department of Oncology, University of Glasgow, Garscube Estate, Bearsden, Glasgow G61 1DB, United Kingdom; e-mail: j.cassidy{at}beatson.gla.ac.uk.
PURPOSE: Capecitabine has demonstrated high efficacy as first-line treatment for metastatic colorectal cancer (MCRC). Oxaliplatin shows synergy with fluorouracil (FU), with little toxicity overlap. The XELOX regimen (capecitabine plus oxaliplatin), established in a previous dose-finding study, should improve on infused oxaliplatin with FU and leucovorin (FOLFOX) regimens. The present studies further characterize efficacy and safety of the XELOX regimen.
PATIENTS AND METHODS: The antitumor activity of XELOX was investigated in a colon cancer xenograft model. Patients with MCRC received first-line XELOX in 3-week treatment cycles: intravenous oxaliplatin 130 mg/m2 (day 1) followed by oral capecitabine 1,000 mg/m2 twice daily (day 1, evening, to day 15, morning).
RESULTS: A preclinical study confirmed that capecitabine has supra-additive activity with oxaliplatin. In the clinical study, 53 of 96 patients (55%) achieved an objective response, and 30 (31%) experienced disease stabilization for 3 months following treatment. After 24 months' minimum follow-up, median time to disease progression (TTP) and median overall survival were 7.7 and 19.5 months, respectively. XELOX safety was predictable and similar to the FOLFOX4 regimen, except that myelosuppression was uncommon with XELOX (grade 3 or 4 neutropenia, 7%). Most adverse events were mild to moderate, the most common being acute sensory neuropathy (85%). Sixty-day, all-cause mortality was 2%.
CONCLUSION: XELOX is a highly effective first-line treatment for MCRC. Response rates, TTP, and overall survival are similar to those observed with FU/leucovorin/oxaliplatin combinations. XELOX provides a more convenient regimen, likely to be preferred by both patients and healthcare providers. Capecitabine has the potential to replace FU/LV in combination with oxaliplatin for MCRC.
Supported by F. Hoffmann-La Roche Ltd.
Authors' disclosures of potential conflicts of interest are found at the end of this article.

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