OBJECTIVES: I. Define toxicity and the maximum tolerated dose of humanized monoclonal antibody A33 (MOAB A33) when combined with carmustine, fluorouracil, vincristine, and streptozocin in patients with advanced colorectal cancer. II. Determine the effect of chemotherapy on human antihuman antibody response and on the pharmacokinetics of humanized MOAB A33 in these patients. III. Define the humanized MOAB A33 dose for a phase II study.
OUTLINE: This is a dose escalation study of humanized monoclonal antibody A33 (MOAB A33). Patients receive humanized MOAB A33 IV once a week for 14 weeks. Chemotherapy begins on day 29 and consists of carmustine IV on days 29-33, fluorouracil IV on days 29-33 and 64-68, vincristine IV on days 29 and 64, and streptozocin IV every 7 days, beginning on day 29, for 10 doses. Courses repeat every 14 weeks in the absence of disease progression or unacceptable toxicity. Cohorts of 3-6 patients receive escalating doses of humanized MOAB A33. The maximum tolerated dose is defined as the dose at which no more than 2 of 6 patients experience dose limiting toxicity.
PROJECTED ACCRUAL: There will be 3-18 patients accrued into this study over 2-9 months.
