Zolbetuximab (Vyloy) for Gastric and Gastroesophageal Carcinoma

Zolbetuximab-clzb (Vyloy – Astellas), a claudin 18.2 (CLDN18.2)-directed cytolytic antibody, has been approved by the FDA for use in combination with fluoropyrimidine- and platinum-containing chemotherapy for first-line treatment of locally advanced unresectable or metastatic human epidermal growth factor receptor 2 (HER2)-negative gastric or gastroesophageal junction (GEJ) adenocarcinoma in patients who have CLDN18.2-positive tumors. It is the first monoclonal antibody to be approved in the US that selectively targets CLDN18.2.