NCT05113394

Preventing Childhood Asthma Using Prophylactic House Dust Mite Allergen Immunotherapy

• Status: Withdrawn
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 0 (actual)
• Sponsor: Boston Children's Hospital · Academic / Other
• Sex: All
• Age: 6 Months – 12 Months
• Healthy volunteers: Accepted

Summary

To establish efficacy and safety of HDM sublingual Immunotherapy (HDM-SLIT) by comparing Odactra and placebo, when given sublingually for 3 years to high risk infants aged between 6 to 12 months at enrollment in preventing the development of asthma, assessed 1.5 years after discontinuation of treatment.

Detailed description

Aim to prevent the development of asthma in children by intervening at a time when the developing system in still amenable to immune modulation, by using the only therapy that has proven ability to change the natural history of allergic diseases and induce clinical remission. We hypothesize that three years of HDM Immunotherapy in high-risk infants will prevent the development of asthma assessed over a period of 1.5 years after discontinuation of treatment and HDM immunotherapy will result in (a) a significant reduction in the number and pathogenic features of HDM-reactive TH2 cells, and (b) an increase in the numbers of HDM-reactive TH and TREG cells expressing the interferon-response signature. The study is a Randomized (1:1), double blinded, placebo controlled, parallel arms, multi-site, Phase II study with a 3 year treatment phase and further 1.5 year follow-up phase. The study duration for each participant is 4.5 years. Overall study duration is 84 months (7 years); which include 9 months preparation and regulatory approvals, 15 months accrual, 36 months treatment and 18 months follow-up observation period.

Conditions

• Asthma
• Allergy

Interventions

Type	Name	Description
DRUG	HDM sublingual Immunotherapy	HDM-SLIT tablet (Odactra®/Acarizax®) is a rapidly dissolving, freeze-dried, oral lyophilizate for oromucosal treatment, which contains a 1:1 mixture of two allergen extracts derived for the cultivated house dust mites, D. pteronyssinus and D. farinae. These species are included in SLIT tablet and subcutaneous immunotherapy administered for the treatment of allergic rhinitis and asthma in the pediatric and adult populations. The tablet dissolves within seconds after contact with a wet surface such as the oral mucosa. Participants will be administered the drug sublingually for 3 years.
DRUG	Placebo	Placebo sublingual therapy

Timeline

• Start date: 2027-02-01
• Primary completion: 2028-02-01
• Completion: 2029-08-01
• First posted: 2021-11-09
• Last updated: 2024-11-26