OncoMed commences third Phase 1b clinical trial for OMP-54F28 OncoMed Pharmaceuticals (OMED) announced the initiation of patient treatment for its third multi-center Phase 1b clinical trial of OMP-54F28 with carboplatin and paclitaxel in patients with platinum-sensitive ovarian cancer. OMP-54F28 is a first-in-class decoy receptor targeting the Wnt pathway and is part of OncoMed's collaboration with Bayer Pharma AG (BAYRY). The Phase 1b clinical trial of OMP-54F28 in combination with carboplatin and paclitaxel is a dose-escalation study in patients with recurrent platinum-sensitive ovarian cancer. Primary objectives of the trial are to evaluate safety of this combination regimen and determine a recommended Phase 2 dose for OMP-54F28 in combination with carboplatin and paclitaxel. Key secondary and exploratory objectives include evaluation of the pharmacokinetics and pharmacodynamics of OMP-54F28, as well as the efficacy of this combination. Tumor tissue from patients will be used to explore predictive biomarker hypotheses related to the efficacy of OMP-54F28.