Mucosal Immunotherapy for Peanut Allergy in Young Children

10:06 EDT 2nd September 2014 | BioPortfolio

Summary

Peanut allergy is known to cause severe anaphylactic reactions.The goal of this proposal is to produce a new treatment that would benefit young subjects who have recently been diagnosed with peanut allergy by lowering the risk of anaphylactic reactions (desensitization), and changing the peanut-specific immune response in subjects who have peanut allergy (tolerance).

Description

Peanut allergy is known to cause severe anaphylactic reactions. Compared with other food allergies, it tends to be more persistent and its prevalence seems to be rising. Currently, there is no proven treatment other than strict avoidance. We are attempting to decrease the risk of anaphylaxis on accidental ingestion by desensitizing subjects to peanut using peanut mucosal immunotherapy (PMIT). We are also studying the effect of PMIT on the peanut-specific immune response to determine if tolerance to peanut protein will develop. Based on our preliminary work and recent studies supporting the importance of early oral exposure in tolerance induction, we propose that early treatment of peanut allergy with PMIT will be safe and effective. Children ages 9 to 36 months with peanut allergy will be randomized to receive high or low dose PMIT using peanut flour. Peanut-allergic subjects receiving no intervention will serve as controls. Subjects will undergo desensitization on the first day and then increase the doses gradually to a maintenance dose. Doses will be taken daily at home except for dose increases which will be done on the Duke Clinical Research Unit. Subjects will undergo a double-blinded, placebo-controlled food challenge (DBPCFC) if challenge criteria are met. Subjects passing the first challenge will stop PMIT and repeat the DBPCFC to assess tolerance. Outcome variables of interest include response to double-blind placebo controlled food challenges, skin prick testing, peanut specific serum IgE, IgG, and IgG4 and stool IgA, T and B cell responses, quality of life, and adverse events. These longitudinal results will be compared between high and low dose PMIT groups and controls using appropriate statistical analysis.

Study Design

Allocation: Randomized, Control: Historical Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Conditions

Food Hypersensitivity

Intervention

Peanut and placebo flour, Peanut protein flour

Location

Duke University Medical Center
Durham
North Carolina
United States
27710

Status

Recruiting

Source

Duke University

Results (where available)

View Results

Links

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Medical and Biotech [MESH] Definitions

Allergic reaction to peanuts that is triggered by the immune system.

A flour made of pulverized, dried fish or fish parts.

Baked food product made of flour or meal that is moistened, kneaded, and sometimes fermented. A major food since prehistoric times, it has been made in various forms using a variety of ingredients and methods.

Ground up seed of WHEAT.

Food products manufactured from fish (e.g., FISH FLOUR, fish meal).

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