IO Biotech Presents New Data at AACR 2025 Supporting Dual Mechanism and Immune Activation of Cancer Vaccines IO102-IO103 and IO170

Core Insights - IO Biotech presented new preclinical data for its dual-antigen and TGF-β-directed vaccines at the AACR Annual Meeting 2025, highlighting their potential to reshape the tumor microenvironment and enhance anti-tumor immunity [1][2] Company Overview - IO Biotech is a clinical-stage biopharmaceutical company focused on developing immune-modulatory, off-the-shelf therapeutic cancer vaccines using its T-win® platform, which aims to activate T cells against both tumor cells and immune-suppressive cells [4] - The company is advancing its lead investigational cancer vaccine candidate, Cylembio® (IO102-IO103), which has received Breakthrough Therapy Designation from the FDA for treating advanced melanoma in combination with Merck's KEYTRUDA® [4] Vaccine Candidates - IO102-IO103, a dual-antigen vaccine targeting IDO1+ and PD-L1+ cells, demonstrated strong T-cell responses and modulated the tumor microenvironment in mouse models, indicating a potentially synergistic mechanism compared to conventional PD-1 or PD-L1 inhibitors [7] - IO170, targeting TGF-β, showed significant tumor growth inhibition in breast and prostate cancer mouse models, leading to increased infiltration of vaccine-specific T cells and reshaping the tumor microenvironment to favor immune activation [7]