Phase II study of docetaxel-plus-bevacizumab combination therapy in patients previously treated for advanced...

This phase II study was conducted to evaluate the efficacy and safety of docetaxel and bevacizumab combination therapy in patients with previously-treated non-squamous non-small cell lung cancer (Nsq NSCLC).

Patients with histologically- or cytologically-confirmed Nsq NSCLC, 20-74 years of age, who had performance status 0-2, and had undergone at least one prior chemotherapy course were eligible for the study. Patients were treated with docetaxel (60 mg/m(2)) and bevacizumab (15 mg/kg) on day 1, which was repeated every three weeks until progressive disease or unacceptable toxicity occurred. The primary end-point was the response rate (RR) and the planned sample size was 28 patients.

Between May 2010 and July 2011, 28 patients were enrolled (16 males, 12 females; median age=65 years; performance status 0/1: 19/9; adenocarcinoma/other: 22/6; number of prior chemotherapy courses 1/2/3 or more: 16/5/7). Twenty-eight patients were included in the toxicity analysis, out of whom 27 were evaluable for response. Objective response was observed in 18 patients (partial response in 18, stable disease in 8, progressive disease in 1); the RR and disease control rates were 66.7% and 96.0%, respectively. The median follow-up was 23.9 months, median progression-free survival was 7.2 months, and median overall survival was 21.6 months. The main toxicity associated with this regimen was myelosuppression (grade 3/4 neutropenia: 82.1%; febrile neutropenia: 21%). Mild non-hematological toxicity was observed but there was no severe bleeding.

The combination regimen of docetaxel-plus-bevacizumab is very active in patients with previously-treated Nsq NSCLC and warrants further research.