OBI Pharma Inc., announced topline results from a phase II/III study of OBI-822/821 (formerly OPT822/OPT821), which evaluated the clinical benefit and immunogenicity in patients with metastatic breast cancer. The study did not meet the primary efficacy endpoint of progression-free survival.
However, patients who demonstrated an immune response showed highly significant improvement in progression-free survival and the secondary endpoint of overall survival is trending towards statistical significance. OBI-822/821 was generally well tolerated with no major safety concerns. Full results will be presented at an upcoming international scientific conference.