Construction of a Predictive Model for the Efficacy of Chemoprevention Combined With Targeted Therapy in Pancreatic Cancer

Primary Objective: Based on a cohort of pancreatic cancer patients receiving combined chemotherapy with immunotherapy and targeted therapy, analyze tumor microenvironment characteristics through multiplex immunohistochemistry and spatial transcriptomics. Identify key biomarkers associated with treatment efficacy and prognosis, and establish a clinically applicable predictive model for treatment outcomes in pancreatic cancer patients undergoing combined chemotherapy with immunotherapy and targeted therapy. Secondary Objectives: Establish pancreatic cancer organoids and humanized immunocompetent mouse models to functionally validate the aforementioned efficacy prediction model and explore the molecular mechanisms by which the tumor microenvironment modulates treatment response.