OncoMed begins second Phase 1b clinical trial for OMP-54F28 with sorafenib OncoMed Pharmaceuticals (OMED) announced that it has started a multi-center Phase 1b clinical trial of OMP-54F28 with sorafenib in hepatocellular cancer, or HCC. OMP-54F28 is a first-in-class Wnt-pathway-targeting decoy receptor and is part of OncoMed's collaboration with Bayer Pharma AG (BAYRY). This is the second of three Phase 1b trials for OMP-54F28 to begin patient enrollment; earlier this year OncoMed initiated a Phase 1b of OMP-54F28 with nab-paclitaxel and gemcitabine in pancreatic cancer. The Phase 1b clinical trial is a dose-escalation study of OMP-54F28 in combination with sorafenib in patients with first-line locally advanced or metastatic HCC. 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 sorafenib. 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.