Peanut Oral Immunotherapy in Children With Peanut Allergy (Peanut Flour)

This is a phase I, open label study for the initial 12 month desensitization phase of peanut oral immunotherapy and a 2 year maintenance phase. Subjects will be recruited to determine the immune response during the administration of peanut OIT after the development of disease. Cohort will include children age 5-16 years who have peanut allergy. The study will require approximately 36 visits with 3 phases: screening phase (\~ 2 months); build-up phase (weeks 1 year), followed by the maintenance phase (2 years). The primary objective of the OIT protocol is to desensitize subjects to peanut and this occurs over the first 12 months of the study (build-up phase). The first dose will be based on the amount at which the subject reacted during a double blind placebo controlled food challenge (DBPCFC). Thereafter, dose escalation would continue as outlined in the protocol for approximately 50 weeks until the maintenance dose of peanut protein (3900 mg) is reached. The maintenance phase will continue from the end of the build-up phase until approximately 24 months. During this phase, the subject will switch to a peanut equivalent dose for the maintenance phase. At the conclusion of the maintenance phase a DBPCFC will be done. Negative challenges will be confirmed by open challenge. DBPCFC will be done.