Syndax says PFS analysis did not show statistically significant benefit
Syndax Pharmaceuticals announced it will provide an update on E2112, its NCI-sponsored, ECOG-ACRIN led pivotal trial of entinostat plus exemestane in hormone receptor positive, human epidermal growth factor receptor 2 negative breast cancer as well as its registration strategy for entinostat in combination with KEYTRUDA in patients with non-small cell lung cancer, NSCLC, on Thursday, October 25 at 4:15 p.m. ET. As planned, ECOG-ACRIN is confidentially holding the findings from the PFS analysis until reporting final OS results. After recently performing the third interim OS analysis, ECOG-ACRIN informed the Company that the trial will continue as planned until either it observes an OS benefit or the final target number of events occur. The next interim analysis for the OS primary endpoint is scheduled for 2Q19 with additional interim analyses every six months. Based on the trial design, any positive OS assessment would enable the Company to file for full regulatory approval."While the PFS analysis did not show a statistically significant benefit, E2112 was primarily designed to determine whether the combination of entinostat and exemestane could improve OS based on the compelling OS results obtained in the Phase 2b ENCORE 301 trial," said Briggs W. Morrison, M.D., Chief Executive Officer of Syndax. "It was Phase 2b OS results that led to the FDA granting Breakthrough Therapy Designation for this indication and we remain confident in the opportunity for a positive OS trial."