Peregrine Pharmaceuticals Inc. (PPHM) announced that interim results were presented from its 121 patient randomized, double-blind, placebo-controlled Phase IIb trial in patients with refractory non-small cell lung cancer or NSCLC.
The company noted that the blinded study evaluated two dose levels of bavituximab (bavituximab-containing arms) given with docetaxel versus docetaxel plus placebo (control arm). The interim data showed a statistically significant improvement in overall survival (Hazard Ratio 0.524, p-value .0154) and a doubling of median overall survival or OS in the bavituximab-containing arms compared to the control arm.
The trial enrolled 121 patients (117 evaluable per the study protocol) with second-line non-squamous NSCLC following one prior chemotherapy regimen at over 40 clinical centers. Patients were equally randomized to 1 of the 3 treatment arms, docetaxel (75mg/m2) plus either placebo, 1 mg/kg bavituximab, or 3 mg/kg bavituximab until disease progression. Approximately 50% of the patients were enrolled in the U.S. and 50% were enrolled internationally with equal distribution between all treatment groups.
The company noted that the interim results from the study showed no significant safety differences between the three treatment arms as determined by the trial's independent data monitoring committee. Baseline characteristics were well balanced across all three treatment arms of the study, including performance or ECOG status, age, gender, and race. Tumor responses were determined in accordance with Response Evaluation Criteria In Solid Tumors (RECIST 1.1) based on blinded central radiology review.
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