[Clinical research of bevacizumab in combination with irinotecan, fluorouracil and leucovorin for advanced metastatic colorectal cancer].

ABSTRACT

OBJECTIVE: To evaluate the efficacy of bevacizumab in combination of irinotecan,fluorouracil and leucovorin for metastatic colorectal cancer treated by failed prior oxaliplatin -based regiment. METHODS: Sixty-two patients were randomly divided into two groups, group A of 30 patients received bevacizumab plus irinotecan, fluorouracil and leucovorin, group B of 32 patients received irinotecan, fluorouracil and leucovorin. The response rate,change of tumor markers,one year survival rate and safety were observed. RESULTS: Tumor response rate was 30% in group A, 21.8% in group B respectively. Disease control rate(CR+PR+SD) was 80% in group A, 50% in group B. The obvious change of concentration of tumor markers was observed between pre-treatment and post-treatment, which was significantly different in group A(P<0.05). One year survival rate, median of time to progression and median duration of survival between group A and group B were 26.7% vs 18.8%, 5.9 months vs 3.9 months, 10.9 months vs 8.9 months(P<0.05). The adverse effect in group A was the same as group B. Bevacizumab was associated with hypertension and bradycardia. CONCLUSIONS: The chemotherapy of bevacizumab combined with irinotecan, fluorouracil and leucovorin results in better efficacy in patients with progressive metastatic colorectal cancer.