Aims: Trebananib, a peptide-Fc fusion protein, inhibits angiogenesis by inhibiting binding of angiopoietin-1/2 to the receptor tyrosine kinase Tie2. This randomized, double-blind, placebocontrolled phase 3 study evaluated whether trebananib plus pegylated liposomal doxorubicin (PLD) improved progression-free survival (PFS) in patients with recurrent epithelial ovarian cancer.
Methods:Women with recurrent ovarian cancer (platinum-free interval ≤12 months) were randomized to intravenous PLD 50 mg/m 2 once every 4 weeks plus weekly intravenous trebananib 15 mg/kg or placebo. PFS was the primary endpoint; key secondary endpoints were objective response rate (ORR) and duration of response (DOR). Owing to PLD shortages, enrollment was paused for 13 months; the study was subsequently truncated.Results: Two hundred twenty-three patients were enrolled. Median PFS was 7.6 months (95%CI, 7.2─9.0) in the trebananib arm and 7.2 months (95%CI, 4.8─8.2) in the placebo arm, with a hazard ratio of 0.92 (95%CI, 0.68─1.24). However, because the proportional hazards assumption was not fulfilled, the standard Cox model did not provide a reliable estimate of the hazard ratio. ORR in the trebananib arm was 46% versus 21% in the placebo arm (odds ratio, 3.43; 95%CI, 1.78-6.64). Median DOR was improved (trebananib, 7.4 [95%CI,.6] months; placebo, 3.9 [95%CI, 2.3-6.5] months). Adverse events with a greater incidence in the trebananib arm included localized edema (61% versus 32%), ascites (29% versus 9%), and vomiting (45% versus 33%).
Conclusions