This is a parallel group, Phase 3, multinational, multicenter, randomized, double-blind, placebo-controlled, 3-arm study for treatment of participants diagnosed with moderate-to-severe AD on background TCS who have had inadequate response to prior biologic or oral JAKi therapy.
The purpose of this study is to measure the efficacy and safety of treatment with amlitelimab solution for subcutaneous (SC) injection compared with placebo in participants with moderate-to-severe AD aged 12 years and older on background TCS and have had an inadequate response to prior biologic or an oral JAKi therapy.
Study details include:
At the end of the treatment period, participants will have the option to enter the Long-Term Safety Study LTS17367 (RIVER-AD).
The study duration will be up to 56 weeks for participants not entering the long-term safety study (LTS17367 \[RIVER-AD\]) including a 2 to 4-week screening, a 36-week randomized double-blind period, and a 16-week safety follow-up.
The study duration will be up to 40 weeks for participants entering the long-term safety study (LTS17367 \[RIVER-AD\]) including a 2 to 4-week screening and a 36-week randomized double-blind period.
The total treatment duration will be up to 36 weeks. The total number of visits will be up to 13 visits (or 12 visits for those entering the long-term safety study LTS17367 \[RIVER-AD\] study).
Participants must be 12 years of age (when signing informed consent form)
Diagnosis of AD for at least 1 year (defined by the American Academy of Dermatology Consensus Criteria)
Documented history prior to screening visit of inadequate response to a biologic AD medication or an oral JAKi therapy.
v-IGA-AD of 3 or 4 at baseline visit
Skin co-morbidity that would adversely affect the ability to undertake AD assessments
Known history of or suspected significant current immunosuppression
Any malignancies or history of malignancies prior to baseline (with the exception of non-melanoma skin cancer excised and cured >5 years prior to baseline)
History of solid organ or stem cell transplant
Parallel
Amlitelimab
DrugPharmaceutical form: Injection solution Route of administration: Subcutaneous
Placebo
DrugPharmaceutical form: Injection solution Route of administration: Subcutaneous
Topical corticosteroids
DrugPharmaceutical form: Various Topical formulation Route of administration: Topical
Topical tacrolimus or pimecrolimus
DrugPharmaceutical form: Various Topical formulation Route of administration: Topical
EU, EU reference countries, and Japan: Proportion of participants with Validated Investigator Global Assessment scale for Atopic Dermatitis (vIGA-AD) of 0 (clear) or 1 (almost clear) and a reduction from baseline of ≥2 points at Week 36
The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe).
EU, EU reference countries, and Japan: Proportion of participants reaching 75% reduction from baseline in Eczema Area and Severity Index (EASI) score (EASI75) at Week 36
The EASI is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD. Total score ranges from 0 to 72 with a higher score indicating increased extent and severity of AD.
US and US reference countries: Proportion of participants with vIGA-AD of 0 (clear) or 1 (almost clear) and a reduction from baseline of ≥2 points at Week 36
The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe).
Proportion of participants reaching EASI-75 at Week 36 (for US and US reference countries only)
The EASI is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD. Total score ranges from 0 to 72 with a higher score indicating increased extent and severity of AD. EASI-75 is 75% reduction from baseline in EASI score.
Proportion of participants with vIGA-AD 0 (clear) or 1 (almost clear) with presence of only barely perceptible erythema (no induration/papulation, no lichenification, no oozing or crusting and a reduction from baseline of ≥2 points)
The vIGA-AD is an Investigator-completed assessment scale used to determine severity of AD and clinical response to treatment. It is based on a 5-point scale, ranging from 0 (clear) to 4 (severe).
Proportion of participants with ≥4-point reduction in weekly average of daily Peak Pruritus-Numerical Rating Scale (PP-NRS) from baseline in participants with baseline weekly average of daily PP-NRS ≥4
The PP-NRS is a validated single item 0-10 numeric rating scale assessing peak pruritus (itch) associated with AD with 0 = no itch and 10 = worst itch imaginable.
Proportion of participants reaching EASI-75
The EASI is an Investigator-assessed validated tool used to measure the extent (area) and severity of AD. Total score ranges from 0 to 72 with a higher score indicating increased extent and severity of AD. EASI-75 is 75% reduction from baseline in EASI score.
