NanoPDLIM2-Based Combination Therapy for Lung Cancer Treatment in Mouse Preclinical Studies

This protocol describes the preparation, administration, and analysis of a nanoparticle-based therapeutic strategy (nanoPDLIM2) in combination with PD-1 immune checkpoint blockade immunotherapy and chemotherapy for the treatment of lung cancer in mouse preclinical studies. NanoPDLIM2 uses a polyethyleneimine (PEI)-based delivery system that encapsulates PDLIM2 expression plasmids for reconstituting PDLIM2 that is repressed in tumors. This approach induces tumor immunogenicity, suppresses drug resistance, and improves treatment efficacy when used in combination with carboplatin, paclitaxel, and anti-PD-1 antibodies. The protocol describes steps for mouse lung tumor induction, nanoPDLIM2 and other therapeutic reagents' preparation and administration, and subsequent analysis of tumor burden, immune response, and toxicity, providing a reproducible approach for investigators. Key features • Comprehensive workflow for preparation and delivery of nanoPDLIM2. • Combination of nanoPDLIM2 with PD-1 blockade and chemotherapeutics for superior efficacy in lung cancer treatment. • Detailed protocols for therapeutic reagents preparation, administration, tumor examination, immune analysis, health monitoring, and toxicity evaluation in a preclinical lung cancer model.