Cytune Pharma, based in Nantes, France, is a biotech company dedicated to the research and development of a portfolio of novel immunotherapeutic agents. Its proprietary lead product, RLI15, is a human fusion protein of IL-15 and the high-affinity binding domain of IL-15Rα. Cytune is also developing RLI15-based immunocytokines, where RLI 15 is fused to anti-tumor antibodies.