Sanofi has stopped a global programme evaluating the clinical effectiveness of tusamitamab ravtansine, an antibody-drug conjugate (ADC), after a Phase 3 trial of the drug failed to improve progression-free survival in patients with a type of non-small cell lung cancer. Tusamitamab ravtansine was targeting a transmembrane cell adhesion molecule – carcinoembryonic antigen-related cell adhesion molecule 5 – which is associated with a number of cancers.