一次情報の記録
Phase 3 HERIZON-GEA-01 met its PFS primary endpoint for zanidatamab plus chemotherapy (with or without tislelizumab) versus trastuzumab plus chemotherapy. The triplet arm also met the OS endpoint; the doublet arm showed a clinically meaningful OS trend. Jazz plans to file a supplemental BLA in 1H-2026.
EX-99.1 2 d17392dex991.htm EX-99.1 EX-99.1 Exhibit 99.1 Zymeworks Announces Positive HERIZON-GEA-01 Phase 3 Results Supporting Ziihera ® (zanidatamab-hrii) as HER2-Targeted Agent-of-Choice and New Standard of Care in First-Line HER2-Positive Locally Advanced or Metastatic Gastroesophageal Adenocarcinoma • Ziihera ® plus chemotherapy showed a clinically meaningful and statistically significant improvement in PFS versus trastuzumab and chemotherapy, and a clinically meaningful effect with a strong trend toward statistical significance for OS at the first OS interim analysis • Ziihera plus Tevimbra ® (tislelizumab) and chemotherapy demonstrated clinically meaningful and statistically significant improvements in OS and PFS versus trastuzumab and chemotherapy • Results support Ziiher