Sanofi Dupixent application for treatment of chronic spontaneous urticaria in adults, adolescents accepted for USFDA review

CSU is an inflammatory skin condition driven in part by type 2 inflammation, which causes sudden and debilitating hives and swelling on the skin. Swelling, called angioedema, may occur most commonly on the face, hands and feet, but can also affect the throat and upper airways. CSU is typically treated with H1 antihistamines, medicines that target histamine-1 receptors on cells to control symptoms of urticaria. However, the disease remains uncontrolled in up to 50% of patients, who are left with limited alternative treatment options. These individuals continue to experience symptoms, including persistent itch or burning sensations that can be debilitating and significantly impact quality of life.

Dupixent is a fully human monoclonal antibody that inhibits the signaling of the IL-4 and IL-13 pathways and is not an immunosuppressant. 

The sBLA is supported by data from two Phase 3 trials (LIBERTY-CUPID Studies A and B), evaluating Dupixent in two different patient populations with uncontrolled CSU. Study A was conducted in CSU patients who were uncontrolled on standard-of-care antihistamines with efficacy and safety data supporting the submission, while Study B was conducted in CSU patients who were uncontrolled on standard-of-care antihistamines and refractory to omalizumab with results providing additional supporting data.

The potential use of Dupixent in CSU is currently under clinical development, and the safety and efficacy have not been fully evaluated by any regulatory authority.