• Sanofi's amlitelimab (formerly KY1005), acquired through its $1.45 billion Kymab purchase, demonstrated significant efficacy in a Phase 2a trial for moderate to severe atopic dermatitis with an 80% improvement in EASI scores at the low dose.
• The OX40 ligand-targeting antibody showed durable effects, with two-thirds of patients maintaining clear or almost clear skin 24 weeks after the final dose, positioning it as a potential complement to Sanofi's blockbuster Dupixent.
• Despite increasing competition in the atopic dermatitis market from biologics and JAK inhibitors, Sanofi is advancing amlitelimab to Phase 2b trials, emphasizing the need for diverse treatment options for this challenging condition.