Lebrikizumab off-therapy remission sustained up to 38 weeks in atopic dermatitis

AIM OF THE STUDY: Lebrikizumab monotherapy demonstrated efficacy for adults and adolescents with moderate-to-severe atopic dermatitis (AD). This study aims to evaluate the relationship between lebrikizumab serum levels and stable deep response after treatment cessation in Week 16-responder patients who maintained stable EASI 90 response post-induction up to Week 52. MATERIALS AND METHODS: Analysis was pooled from two identically designed, randomized, double-blind, placebo-controlled, phase 3 trials, ADvocate1 (NCT04146363; conducted from September 24, 2019, to May 3, 2022) and ADvocate2 (NCT04178967; conducted from October 29, 2019, to April 28, 2022). The analysis subgroup includes those patients who were Week-16 responders, have been re-randomized to receive placebo (withdrawal arm), and maintained a stable EASI 90 response for at least 80% of visits up to 52 weeks, without rescue medication. Serum lebrikizumab was measured at Weeks 4, 16, 32, and 52. RESULTS: During withdrawal, 28% of responders (17/60) maintained a stable EASI 90 response with no or minimal fluctuations, including at Week 52, without rescue medication. Mean serum lebrikizumab decreased by 92% and over 99% from Week 16 to Weeks 32 and 52, respectively (Week 16 = 92.4 μg/mL; Week 32 = 7.3 μg/mL; Week 52 = 0.15 μg/mL). CONCLUSION: Lebrikizumab demonstrated off-therapy maintenance of response in an AD patient subset for at least 38 weeks post-discontinuation.