A Study of Multiple Immunotherapy-Based Treatment Combinations in Participants With Metastatic Pancreatic Ductal Adenocarcinoma (Morpheus-Pancreatic Cancer)

Prior treatment

• Positive human immunodeficiency (HIV) test at screening or at any time prior to screening
• Severe infection within 4 weeks prior to initiation of study treatment
• Prior allogeneic stem cell or solid organ transplantation

Other illness

• History of leptomeningeal disease
• Active or history of autoimmune disease or immune deficiency
• History of idiopathic pulmonary fibrosis, organizing pneumonia, drug-induced pneumonitis, or idiopathic pneumonitis, or evidence of active pneumonitis on screening chest computed tomography (CT) scan
• Active hepatitis B or C virus infection or active tuberculosis
• History of malignancy other than pancreatic carcinoma within 2 years prior to screening, with the exception of those with a negligible risk of metastasis or death

Other

• Uncontrolled pleural effusion, pericardial effusion, or ascites requiring drainage procedure (i.e., more than one time per month)
• Symptomatic, untreated, or actively progressing central nervous system (CNS) metastases

• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
• Histologically or cytologically confirmed metastatic pancreatic ductal adenocarcinoma
• For patients in Cohort 1: no prior systemic treatment for PDAC
• For patients in Cohort 2: disease progression during administration of either 5-FU- or gemcitabine-based first-line chemotherapy
• Life expectancy greater than or equal to 3 months
• Availability of a representative tumor specimen that is suitable for determination of programmed death-ligand 1 (PD-L1) and/or additional biomarker status via central testing
• Measurable disease (at least one target lesion) according to RECIST v1.1
• Adequate hematologic and end-organ function test results
• Tumor accessible for biopsy
• For women of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraceptive measures, and agreement to refrain from donating eggs, as outlined for each specific treatment arm
• For men: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraceptive measures, and agreement to refrain from donating sperm, as outlined for each specific treatment arm