401 Safety and efficacy of lebrikizumab in adolescent patients with moderate-to-severe atopic dermatitis: an open-label study

Abstract Atopic dermatitis (AD) can greatly impact quality of life in adolescents, and improved management is needed. Lebrikizumab, a high-affinity monoclonal antibody targeting interleukin (IL)-13, demonstrated clinical benefit in Phase 3 trials: ADvocate1, ADvocate2 and ADhere. This study aims to report 52-week safety and efficacy outcomes from ADore (NCT04250350), a Phase 3, open label study of lebrikizumab in adolescent patients with moderate-to-severe AD. Eligible adolescents (n = 206) (≥12 to <18 years; weighing ≥40 kg) received 500-mg loading doses at baseline and Week 2, and 250-mg lebrikizumab subcutaneous injections every 2-weeks (Q2W) for 52-weeks. Safety was monitored using adverse events (AEs), AEs leading to treatment discontinuation, vital signs and laboratory testing. Efficacy analyses included Investigator Global Assessment (IGA) and Eczema Area and Severity Index (EASI). A total of 172 patients completed the treatment period. Low frequencies of AEs leading to treatment discontinuation (2.4%) and SAEs (2.4%) were reported. Overall, 134 (65.0%) patients reported at least one treatment-emergent adverse event, most being mild or moderate in severity, including 14 (6.8%) conjunctivitis events. Efficacy was rapid, with 14.4% achieving IGA (0,1) at Week 4, increasing to 46.3% at Week 16 and 62.6% at Week 52. The EASI-75 was 28.6% at Week 4, 73.2% at Week 16, and 81.9% at Week 52. The mean percent improvement from baseline to Week 52 in EASI was 86.0%. Lebrikizumab open-label 250-mg Q2W had a safety profile in adolescents with moderate-to-severe AD, which was consistent with previous trials, with 2.4% treatment discontinuation due to AEs. Lebrikizumab demonstrated efficacy, with 81.9% of patients achieving EASI-75 and 62.6% achieving IGA (0,1) at Week 52.