Ipsen to Acquire ImCheck Therapeutics for €350 Million to Expand Immunotherapy Pipeline on October 22, 2025 Acquisition Anti-BTN3A Agonistic Monoclonal Antibody ICT01 BTN3A butyrophilin superfamily ImCheck Therapeutics Immunotherapy Ipsen Leukemia, Myelocytic, Acute Monoclonal Antibodies oncology pipeline +