Cylembio (IO102-IO103) Development and Clinical Trials - Cylembio, in combination with pembrolizumab, has Breakthrough Therapy Designation for advanced melanoma[11, 12] - Phase 3 pivotal trial in advanced melanoma with PFS as the primary endpoint, readout expected in Q3 2025[12, 23, 27] - Phase 1/2 trial (MM1636) showed 80% ORR, 50% CRR, and 255 months mPFS in melanoma[13, 55] - Completed enrollment of 407 patients in the Phase 3 trial in December 2023[27, 55] - A Phase 2 neoadjuvant/adjuvant basket study is fully enrolled[57] Pipeline and Platform - T-win platform delivers investigational, immune-modulatory, off-the-shelf therapeutic cancer vaccines[11, 35, 66] - The company has 3 pipeline programs, including IO170 targeting Melanoma, SCCHN, NSCLC, and other cancers[11, 35] - IO112, targeting Arginase 1, is a next pipeline candidate expected to enter clinical development, with an IND filing planned in 2025[35, 63, 64] Market and Financial Outlook - The global melanoma market is expected to reach >$13 billion by 2030[15] - The US melanoma market was approximately $45 billion in 2023, growing at 9%[32] - The global NSCLC market is expected to reach approximately $60 billion by 2030[36, 37] - The global SCCHN market is expected to reach approximately $5 billion by 2030[40]

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]