JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

A four-arm, randomized, multicenter phase II trial of oxaliplatin combined with varying schedules of 5-fluorouracil as first-line therapy in previously untreated advanced colorectal cancer

Ramesh K Ramanathan, Georg A Bjarnason, Stephen Alan Bernard, Philip Desimone, Theodore Braich, Joseph P Evars, William J Hrushesky, Jacques Jolivet
Clinical Colorectal Cancer 2008, 7 (2): 134-9
18501073

BACKGROUND: Oxaliplatin combined with 5-fluorouracil (5-FU), with or without leucovorin (LV), is effective and well tolerated for first-line therapy of advanced colorectal cancer (CRC). However, there is no consensus as to which oxaliplatin/5-FU-containing regimen is superior in the first-line setting. This randomized, multicenter phase II trial was designed to evaluate and compare the efficacy of 4 different oxaliplatin/5-FU regimens.

PATIENTS AND METHODS: Patients with previously untreated metastatic CRC (mCRC; n = 129) were randomized to 1 of 4 treatment regimens: (1) continuous 5-FU infusion plus oxaliplatin (n = 23); (2) weekly 5-FU bolus with LV plus oxaliplatin (n = 40); (3) oxaliplatin with 2-day infusion 5-FU/LV (FOLFOX4, n = 41); and (4) chronomodulated 5-FU plus oxaliplatin (n = 25).

RESULTS: Overall response rates, after expert assessment, ranged from 24% to 34%, and median progression-free survival (PFS) ranged from 6 months to 8 months. Although no significant differences in efficacy were detected in pairwise comparisons of the 4 different regimens, patients randomized to FOLFOX4 had the highest response rate and longest PFS. The FOLFOX4 regimen was also associated with the lowest incidence of severe (grade 3/4) toxicity, with the exception of cumulative peripheral neurotoxicity.

CONCLUSION: This randomized phase II trial provides evidence that oxaliplatin/5-FU regimens are effective and well tolerated for first-line therapy of previously untreated mCRC. The FOLFOX regimens are now an established standard for CRC.

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