Astellas Pharma Inc. reported top-line results showing zolbetuximab, a monoclonal antibody targeting Claudin 18.2, met the primary endpoint for progression-free survival (PFS) as well as secondary endpoints for overall survival (OS) in the phase III Glow trial in CLDN18.2-positive, HER2-negative, locally advanced unresectable or metastatic gastric or gastroesophageal junction (GEJ) adenocarcinoma.