This research is designed to determine if experimental treatment with AZD5863, a T cell-engaging bispecific antibody that targets Claudin 18.2 (CLDN18.2) and CD3, is safe, tolerable and has anti-cancer activity in patients with advanced solid tumors.
Age ≥ 18 at the time of signing the informed consent
Histologically confirmed diagnosis of adenocarcinoma of the stomach, gastro-esophageal junction, esophagus, or pancreas
Must have at least one measurable lesion according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1
Must show positive CLDN18.2 expression in tumor cells as determined by central immunohistochemistry (IHC)
Unresolved toxicity from prior anticancer therapy of Common Terminology Criteria for Adverse Events (CTCAE) Grade ≥ 2 except for those defined by the protocol
Participant experienced unacceptable cytokine release syndrome (CRS) or Immune Effector Cell Associated Neurotoxicity (ICANS) following prior T cell engagers (TCE) or chimeric antigen receptor T (CAR-T) cell therapy
Previous history of hemophagocytic lymphohistiocytosis (HLH) / macrophage activation syndrome (MAS)
Active or prior documented autoimmune or inflammatory disorders within 3 years of start of treatment