Allergic Rhinoconjunctivitis Clinical Trial
Official title:
Grass Pollen Sublingual Tablet Immunotherapy Plus Dupilumab for Induction of Tolerance in Adults With Moderate to Severe Seasonal Allergic Rhinitis (ITN084AD)
The primary objective of this study is to assess whether the combination of grass allergen sublingual immunotherapy (SLIT) and dupilumab for 2 years is more effective than double placebo in suppressing the nasal allergen challenge (NAC) response to grass pollen at 1 year after completion of study medication.
This is a double-blind (masked) placebo-controlled trial in adults (N=108 subjects will be enrolled) with moderate to severe seasonal allergic rhinitis and allergic sensitization to grass pollen. Eligible participants who demonstrate a positive response defined by a Total Nasal Symptom Score [TNSS] ≥ 5 (Scale 0-12 in response to a Nasal Allergen Challenge [NAC] with grass pollen extract), will be randomized to one of the following 3 groups in a 1:1:1 ratio: - Grass allergen sublingual immunotherapy (SLIT) + dupilumab (n=36) - Grass allergen SLIT +dupilumab placebo (n=36) - Grass allergen SLIT placebo + dupilumab placebo (n=36) Grazax® is a sublingual grass allergen immunotherapy product approved for clinical use in the United Kingdom and will be used as SLIT in this study. Grazax (and its matching placebo) will be self-administered daily by participants for a duration of two years. Dupixent®is the brand name for dupilumab and is a monoclonal antibody against the interleukin 4 (IL-4) receptor. Dupilumab (and its matching placebo) will be administered every two weeks by subcutaneous injection through for a duration of two years, administered by study personnel. The treatment phase of two years will be followed by an observation phase of 1 year. ;
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