Core Viewpoint - The research emphasizes the importance of understanding the interaction between tumor microenvironment and systemic immune macroenvironment for developing more effective cancer diagnosis and treatment strategies [2]. Group 1: Research Development - A novel organoid co-culture model, the Gel-Liquid Interface (GLI) co-culture model, was developed to explore systemic anti-tumor immunity in lung cancer [3]. - The research team established a lung cancer organoid (LCO) paired with peripheral blood mononuclear cells (PBMC) using the GLI model, enhancing the interaction between immune cells and tumor organoids to better simulate systemic anti-tumor immune responses in vivo [4]. Group 2: Findings and Implications - The study demonstrated that the GLI model's response under anti-PD-1 (αPD1) treatment accurately reflects the immune treatment outcomes of corresponding lung cancer patients [5]. - Functional multi-omics analysis in the GLI model revealed various tumor immune processes mediated by T cells derived from PBMC, characterizing circulating tumor-reactive T cells with an effector memory-like phenotype (GNLY+ CD44+ CD9+) as potential indicators of immunotherapy effectiveness [6]. - Key findings indicate that the GLI co-culture model reflects the immune treatment outcomes of lung cancer patients, reveals the infiltration and activation of peripheral T cells post immune checkpoint inhibitor (ICI) treatment, and shows that PBMC-derived T cells transform into more cytotoxic tumor-reactive T cells under ICI influence [7]. Group 3: Overall Conclusion - Overall, the research results suggest that the GLI co-culture model can be utilized for developing diagnostic strategies for precision immunotherapy and aids in understanding its underlying mechanisms [9].