Capecitabine plus oxaliplatin and irinotecan regimen every other week: a phase I/II study in first-line treatment of metastatic colorectal cancer.

E. Bajetta, L. Celio, E. Ferrario, M. Di Bartolomeo, A. Denaro, K. Dotti, M. Mancin, R. Bajetta, A. Colombo, S. Pusceddu

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BACKGROUND: A phase I/II study was performed to determine the safety and activity of a capecitabine plus oxaliplatin and irinotecan (COI) regimen using capecitabine concurrently with oxaliplatin and irinotecan in previously untreated patients with metastatic colorectal cancer. PATIENTS AND METHODS: Patients received irinotecan on day 1, oxaliplatin (85 mg/m(2)) on day 2 and capecitabine (1000 mg/m(2) orally twice daily) on days 2-6 of a biweekly schedule. Three dose levels ranging from 150 to 180 mg/m(2) were explored for irinotecan in sequential cohorts of three to six patients. Once the recommended dose was determined, a total of 28 eligible patients were planned at this dose level. RESULTS: Thirty-eight patients received a median of six cycles. The recommended phase II dose of irinotecan was 180 mg/m(2). Toxicity was manageable: the most common severe toxicities were diarrhoea (24%) and nausea (16%). Of 27 assessable patients treated at the recommended dose, 17 achieved a partial response (overall response rate (ORR) 63%; 95% confidece interval (CI), 44 to 78%), with eight patients undergoing liver metastasectomy. Estimated progression-free survival and overall median survival were 8.5 and 23.5 months, respectively. CONCLUSIONS: Biweekly COI is feasible and active. Tolerability and ease of administration make the regimen well suited for downsizing hepatic colorectal metastases before curative surgery.

Original languageEnglish
Pages (from-to)1810-1816
Number of pages7
JournalAnnals of Oncology
Issue number11
Publication statusPublished - Nov 2007


ASJC Scopus subject areas

  • Medicine(all)

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