A Pilot Study of the Efficacy and Safety of Dupilumab Versus Placebo in Patients With Netherton Syndrome

  • End date
    Jun 1, 2023
  • participants needed
  • sponsor
    University Hospital, Toulouse
Updated on 12 September 2021


To date, there are no effective therapy for the management of Netherton Syndrome (NS) Patients use emollients with a limited efficacy on scaling and no efficacy on skin inflammation and pruritus. They may also use topical corticosteroids or calcineurin inhibitors in case of eczematous lesions. The use of therapies targeting skin inflammation has been reported in a few case reports. Their efficacy is very limited and their uses are limited because of the chronicity of the disease, the impaired skin barrier function and the risk for skin infections and skin cancers. Therefore, there is a huge medical need for novel therapies in NS.The expected consequences of this study are that a 16-week course of dupilumab will be more effective than placebo for the treatment of moderate to severe NS Dupilumab could therefore improve skin condition and quality of life.


This is a proof of concept (pilot) double-blind randomized placebo-controlled study evaluating the efficacy and safety of dupilumab for the treatment of NS. Patients will be randomized in a 2:1 ratio to receive dupilumab (2 doses of 300 mg), or placebo, at baseline and then 1 dose of dupilumab 300 mg, or placebo, every 2 weeks until week 14 (total of 8 administrations).Moderate to severe NS were selected in order to be able to measure the improvement of skin condition.

Condition Netherton's syndrome
Treatment Dupilumab Prefilled Syringe, Placebo Prefilled Syringe
Clinical Study IdentifierNCT04244006
SponsorUniversity Hospital, Toulouse
Last Modified on12 September 2021


Yes No Not Sure

Inclusion Criteria

Adult patients affiliated to a social insurance protection regimen
Clinical diagnosis of NS (7) (trichorrhexis invaginata, extensive scaling, skin inflammation, allergic manifestations) and absent or marked reduction of LEKTI staining
Moderate to severe forms: NASA (Netherton Area Severity Assessment score) score 5/12 at inclusion
Patients able to understand the study procedures including the ability to complete patient-based self-assessment questionnaires
Patients who agree to sign the written informed consent

Exclusion Criteria

Hypersensitivity to dupilumab or its excipients
Modification of the usual treatment (emollients and topical corticosteroids used on a regular basis) within 2 weeks before inclusion
Treatment with topical calcineurin inhibitors 1 week before inclusion
Treatment with oral immunosuppressant (including cyclosporine, methotrexate, azathioprine, mycophenolate mofetil), oral retinoids (acitretin, alitretinoin, isotretinoin) or phototherapy within 4 weeks before inclusion
Treatment with immunomodulating biologics (Tumor Necrosis Factor (TNF) inhibitor) 16 weeks before inclusion
Treatment with another investigational drug within 8 weeks before inclusion
Treatment with a systemic antibiotic within 2 weeks before inclusion
Active skin infection requiring the use of a systemic therapy within 2 weeks before the inclusion
Any other condition that according to the investigator will impair the ability to evaluate treatment effect
Known or suspected history of immunosuppression, including history of invasive opportunistic infections (e.g., tuberculosis, histoplasmosis, listeriosis, coccidioidomycosis, pneumocystis, aspergillosis)
Current infections including infection with helminthes
Pregnant or breastfeeding women, or women planning to become pregnant or breastfeed during the study. Women of childbearing age, potentially sexually active, and unwilling to use adequate birth control methods
Mental or physical incapacity to fill in the questionnaires
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