A Randomized, Double-Blind, Placebo-Controlled Study to Assess Immunization Responses in Adult and Adolescent Participants With Moderate-to-Severe Atopic Dermatitis Treated With Nemolizumab

This is a randomized, double-blind, placebo-controlled, multi-center, parallel-group study in adult and adolescent subjects (≥ 12 to 54 years) with moderate-to-severe AD. Eligible subjects must have a documented history of inadequate response to topical AD medication(s). Approximately 200 subjects will be randomized 1:1 to receive either 30 mg nemolizumab (with a 60 mg loading dose) or placebo, stratified by baseline disease severity (IGA = 3, moderate; IGA = 4, severe). The study consists of a 2- to 4-week screening period, a 16-week treatment period, and an 8-week follow-up period (12 weeks after the last study drug injection).

Inclusion Criteria:

• Chronic AD for at least 2 years
• EASI score >= 16
• IGA score >= 3
• AD involvement >= 10% of BSA
• Peak (maximum) pruritus NRS score of at least 4.0

Exclusion Criteria:

• Body weight < 30 kilogram (kg)
• History of hypersensitivity (including anaphylaxis) to an immunoglobulin product (plasma-derived or recombinant, eg, monoclonal antibody) or to any of the study drug excipients
• History of severe allergic reaction to either vaccine or to vaccine components including alum, thimerosal, phenol
• Participants for whom administration of the meningococcal vaccine provided in this study is contraindicated or medically inadvisable
• Participants for whom administration of the tetanus, diphtheria, and pertussis vaccine provided in this study is contraindicated or medically inadvisable
• Receipt of any vaccine (except inactivated influenza vaccine) within 12 weeks prior to screening, any meningococcal vaccine within 1 year prior to screening, or any tetanus-, diphtheria-, or pertussis-containing vaccine within 5 years prior to screening

For more information, please call 309-452-0995 and ask to speak to a coordinator.