Background: Interleukin (IL)-13 plays a key role in type 2 inflammation and is an emerging pathogenic mediator in atopic dermatitis (AD).
Objective: We investigated the efficacy and safety of lebrikizumab, an IL-13 monoclonal antibody, as an add-on to topical corticosteroid (TCS) treatment.
Methods: A randomized, placebo-controlled, double-blind, phase 2 study. Adults with moderate-to-severe AD were required to use TCS twice daily and then randomized (1:1:1:1) to lebrikizumab 125 mg single dose, lebrikizumab 250 mg single dose, lebrikizumab 125 mg every 4 weeks for 12 weeks, or placebo every 4 weeks for 12 weeks, after a 2-week TCS run-in. The primary endpoint was percentage of patients achieving Eczema Area and Severity Index (EASI)-50 at week 12.
Results: In total, 209 patients received the study drug. At week 12, significantly more patients achieved EASI-50 with lebrikizumab 125 mg every 4 weeks (82.4%; P = .026) than placebo every 4 weeks (62.3%); patients receiving a single dose of lebrikizumab showed no statistically significant improvements in EASI-50 compared with placebo. Adverse events were similar between groups (66.7% all lebrikizumab vs 66.0% placebo) and mostly mild or moderate.
Limitations: Protocol-mandated twice daily TCS treatment limits our understanding of the efficacy of lebrikizumab as a monotherapy. The short study duration did not enable long-term efficacy or safety evaluations.
Conclusion: When combined with TCS, lebrikizumab 125 mg taken every 4 weeks led to a significant improvement and was well tolerated in patients with moderate-to-severe AD.
Keywords: EASI; anti-IL-13; atopic dermatitis; lebrikizumab; pruritus; topical corticosteroids.
Copyright © 2018 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.