Zipalertinib Plus Chemotherapy Meets Primary Endpoint of Progression-Free Survival in Planned Interim Analysis of Phase 3 REZILIENT3 Trial in First-Line EGFR Exon 20 Insertion Mutation Non-Small Cell Lung Cancer

Zipalertinib Plus Chemotherapy Meets Primary Endpoint of Progression-Free Survival in Planned Interim Analysis of Phase 3 REZILIENT3 Trial in First-Line EGFR Exon 20 Insertion Mutation Non-Small Cell Lung Cancer

Taiho Oncology, Inc., Taiho Pharmaceutical Co., Ltd., and Cullinan Therapeutics, Inc. (Nasdaq: CGEM) today announced that the REZILIENT3 trial, a global Phase 3 clinical trial evaluating the combination of zipalertinib and platinum-based chemotherapy compared with chemotherapy alone in the first-line treatment of adult patients with previously untreated, locally advanced or metastatic non-small cell lung cancer (NSCLC) harboring epidermal growth factor receptor (EGFR) exon 20 insertion (ex20ins) mutations, met its primary endpoint of progression-free survival (PFS) at a planned interim analysis.

In this analysis, the study demonstrated a statistically significant and clinically meaningful improvement in PFS in the zipalertinib containing arm. Observed safety for the zipalertinib containing arm was manageable. Based on these data, the Independent Data Monitoring Committee recommended unblinding the study. The trial will continue to monitor efficacy and safety.

Full results from REZILIENT3 will be submitted for presentation at an upcoming international medical conference. Based on these results, pending discussions with the U.S. Food and Drug Administration (FDA), Taiho Oncology, Taiho Pharmaceutical and Cullinan Therapeutics plan to pursue U.S. regulatory approval for this combination regimen in the first-line setting.