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Dupilumab As An Adjunct For Subcutaneous Grass Immunotherapy

CompletedPhase 2

Sponsor: Regeneron Pharmaceuticals

Conditions: Allergic Rhinitis

Interventions: Dupilumab, Timothy Grass SCIT, Placebo matching dupilumab, Placebo matching SCIT

Countries: United States, Canada

The primary objective is to assess whether 16 weeks of treatment with dupilumab as an adjunct to Timothy Grass Subcutaneous Immunotherapy (SCIT) improves upon the efficacy of Timothy Grass SCIT to reduce provoked allergic rhinitis symptoms, as measured by Total Nasal Symptom Score (TNSS) after nasal allergen challenge (NAC) with Timothy Grass extract at week 17. The secondary objectives of the study are: * To assess whether 16 weeks of treatment with dupilumab as compared to placebo reduces provoked allergic rhinitis symptoms, as measured by TNSS after nasal allergen challenge (NAC) with Timothy Grass extract * To assess whether 16 weeks of treatment with dupilumab as compared to dupilumab + SCIT reduces provoked allergic rhinitis symptoms, as measured by TNSS after nasal allergen challenge (NAC) with Timothy Grass extract * To assess changes in serum Timothy-grass-specific immunoglobulin G4 (IgG4), serum Timothy grass-specific immunoglobulin E (IgE), and ratio of serum Timothy Grass-specific IgG4 to IgE over 16 weeks of treatment with dupilumab + SCIT as compared to SCIT monotherapy * To evaluate the safety and tolerability of 16 weeks of treatment with dupilumab as an adjunct to Timothy Grass SCIT

Eligibility overview

Sex: ALL

Age: 18 Years to 55 Years

Healthy volunteers: No

Study type: INTERVENTIONAL

Eligibility criteria

Key Inclusion Criteria:

1. Male and female participants aged 18 to 55
2. History of grass pollen-induced seasonal allergic rhinitis
3. Grass pollen allergy confirmed by both:

   1. Positive skin prick test (SPT) with Timothy Grass extract (mean wheal diameter at least ≥5 mm greater than a negative control)
   2. Positive serum Timothy Grass-specific IgE (≥0.35KU/L)

Key Exclusion Criteria:

1. Significant rhinitis, sinusitis, outside of the grass pollen season
2. Any contraindications to SCIT (i.e, severe cardiovascular disease, malignancies, autoimmune disease, use of beta blocker, asthma severe enough to require chronic medication, acute infection)
3. Use of systemic corticosteroids within 4 weeks of screening visits or any NAC visits
4. Abnormal lung function as judged by the investigator
5. A clinical history of asthma requiring chronic medication such as regular inhaled corticosteroids for \>4 weeks per year
6. History of significant recurrent sinusitis, defined as 3 episodes per year for the last 2 years, all of which required antibiotic treatment
7. History of chronic sinusitis (with or without nasal polyps)
8. Tobacco smoking (ANY) within the last year

Note: Other protocol defined inclusion/ exclusion criteria apply

Locations (17)

Los Angeles, California, United States
Mountain View, California, United States
Walnut Creek, California, United States
Baltimore, Maryland, United States
Andover, Massachusetts, United States
North Dartmouth, Massachusetts, United States
St Louis, Missouri, United States
Bellevue, Nebraska, United States
Portland, Oregon, United States
East Providence, Rhode Island, United States
Seattle, Washington, United States
Madison, Wisconsin, United States
Kingston, Ontario, Canada
Mississauga, Ontario, Canada
Ottawa, Ontario, Canada
Toronto, Ontario, Canada
Québec, Quebec, Canada