Oral Immunotherapy for Childhood Egg Allergy

Oral Desensitization to Egg With Subsequent Induction of Tolerance for Egg-Allergic Children (CoFAR 3)

The purpose of this study is to determine if oral immunotherapy (OIT) will desensitize a child with an allergy to egg and eventually lead to the development of tolerance to egg.

Study Overview

• Status: Completed
• Conditions: Hypersensitivity; Food Hypersensitivity; Immediate Hypersensitivity
• Intervention / Treatment: Drug: Egg oral immunotherapy; Drug: Control Group

Detailed Description

In the United States, as many as 6% to 8% of children are affected by food allergy. In young children, allergic reactions to egg can range from mild rash to systemic anaphylaxis. The usual standard of care for allergy is complete avoidance of this food allergen and treatment of accidental systemic reactions by access to self-injected epinephrine. However, accidental exposure to allergens in processed foods may be difficult to avoid. Currently, several therapeutic strategies are being investigated to prevent and treat food allergies. Since standard injection (under the skin) immunotherapy for food allergy is associated with a high rate of allergic reactions, a few studies have recently tried oral immunotherapy (OIT) in food allergy. The purpose of this study is to determine the safety and efficacy of the administration of OIT. The intent is to develop desensitization and eventually tolerance to egg allergen. This study will evaluate tolerance to egg white solid that may be gained by gradually increasing the amounts of egg white solid given to a child over a long period of time.

This study will last up to 48 months. The participants will be randomly assigned to receive oral immunotherapy treatment with egg white solid or placebo. This study will include dose escalation and maintenance followed by oral food challenge (OFC).

For participants receiving egg OIT, visit 1 consists of multiple small incremental doses of egg white solid. This is followed by 32-40 weeks of gradual dose escalation to a stable maintenance dose of egg white solid for at least 8 weeks. At approximately Week 44, participants are given an OFC using 5 grams of egg white solid to identify desensitized individuals. Participants and study staff are unblinded following this initial OFC. Maintenance egg OIT therapy is continued for an additional 1-3 years. Oral Food Challenges with 10 grams of egg white solid will be performed for participants on maintenance egg OIT at subsequent time points (approximately Week 96 and annually thereafter) to test for desensitization. If passed, a repeat OFC after being off therapy for 4-6 weeks will be performed to test for tolerance. An OFC to test for tolerance will use 10 grams of egg white solid and be followed by an open feeding of egg.

Participants receiving placebo during dose escalation and maintenance are given an OFC using 5 grams of egg white solid to test for desensitization at approximately 44 weeks. They are unblinded at that time, continue on an egg-restricted diet, and are followed until up to 2 years. These participants will only receive an OFC at a subsequent time point if their egg Immunoglobulin E (IgE) declines to be less than 2 kilounits of antibody per liter; this OFC will use 10 grams of egg white solid and be followed by an open feeding of egg.

At selected visits, blood and urine collection, physical examination, prick skin tests, and atopic dermatitis and asthma evaluations will occur.

• Study Type: Interventional
• Enrollment (Actual): 55
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • Arkansas
    • Little Rock, Arkansas, United States, 72202
      • University of Arkansas Children's Hospital Research Institute
  • Colorado
    • Denver, Colorado, United States, 80206
      • National Jewish Medical and Research Center
  • Maryland
    • Baltimore, Maryland, United States, 21205
      • Johns Hopkins University School Of Medicine
  • New York
    • New York, New York, United States, 10029
      • Mount Sinai School of Medicine
  • North Carolina
    • Chapel Hills, North Carolina, United States, 27599
      • University of North Carolina

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 5 years to 18 years (Child, Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Convincing clinical history of egg allergy
• Age 6 to 18 years, with a serum IgE [UniCAP] to egg > 5 kUA/L OR
• Age 5 to 6 years, with a serum IgE [UniCAP] to egg ≥ 12kUA/L
• Parent/guardian willing to provide informed consent
• Willing to use acceptable forms of contraception

Exclusion Criteria:

• History of severe anaphylaxis to egg. More information on this criterion can be found in the protocol.
• Known allergy to corn
• Chronic disease requiring therapy (e.g., heart disease, diabetes). Participants who have asthma, atopic dermatitis, or rhinitis are not excluded.
• Participation in any interventional study for the treatment of food allergy in the 6 months prior to study entry
• Participant is on "build-up phase" of immunotherapy and has not reached maintenance dosing. Participants tolerating maintenance allergen immunotherapy are not excluded.
• Severe asthma, uncontrolled mild or moderate asthma. More information on this criterion can be found in the protocol.
• Inability to discontinue antihistamines for the initial day of escalation, skin testing, and OFC
• Omalizumab or other nontraditional forms of oral or sublingual allergen immunotherapy, immunomodulator therapy, or biologic therapy in the 12 months prior to study entry. Participants who have taken corticosteroids are not excluded.
• Investigational drugs 90 days prior to study entry or planned use of an investigational drug during the study period
• Pregnancy or breastfeeding

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Egg Oral Immunotherapy (OIT); Subjects ingest egg white solid (EWS) on Visit 1 (initial day dose escalation up to 50 mg), followed by a build-up phase (escalating daily egg doses every 2 wks, achieving a maintenance dose by 32-40 wks). Thereafter, subjects are on a maximally tolerated daily egg dose (306 mg to 2 gm) for ≥8 wks. After wk 44, subjects are given a 5 gm Oral Food Challenge (OFC) using EWS to identify desensitized [1] subjects. Subjects/study staff are unblinded following this OFC and either continue on their egg OIT maintenance dose of 2 gm/day or are allowed to attempt escalation up to 2 gm/day for the remainder of the study (1-3 years). A 10 gm OFC to identify desensitized [1] subjects occurs at specified intervals under prescribed conditions (yrs 2 - 4). Subjects who pass this 1st 10 gm OFC stop study therapy for 4-6 wks, then have a 2nd 10 gm OFC. Subjects that pass this 2nd 10 gm OFC are considered tolerant [2], stop EWS dosing and add egg to their diet.	Drug: Egg oral immunotherapy; Egg white solid powder
Placebo Comparator: Control Group; Subjects ingest placebo (cornstarch) during Visit 1 (initial day of dose escalation up to 50 mg), followed by a build-up phase (escalating daily placebo doses every 2 wks, achieving a maintenance dose by 32-40 wks). Thereafter, subjects were on a maximally tolerated daily placebo dose (306 mg to 2 gm) for ≥8 wks. After wk 44, subjects were given a 5 gm Oral Food Challenge (OFC) using egg white solid to identify desensitized [1] subjects. Subjects/study staff were unblinded following this initial 5 gm OFC. After unblinding, subjects discontinued further placebo dosing and continued on an egg-restricted diet. A 10 gm OFC was administered under prescribed conditions to subjects if their egg-specific serum IgE level was below 2 kUA/L. They were followed in the study up to 2 years. [1] Desensitized: Subject does not react to egg during OFC while taking daily doses of therapy. [2] Tolerant: Subject does not react to egg during OFC 4-6 wks after abstinence from egg consumption.	Drug: Control Group; Placebo for egg white solid

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percent of Participants Who Successfully Consumed 10,000 mg of Egg White Solid Followed by Open Feeding of Egg	Tolerance Assessment: Participants who successfully consumed without dose-limiting symptoms 10,000 mg of egg white solid during a double-blind placebo-controlled oral food challenge were then given an open feeding of egg and those who successfully consumed the open feeding of egg were counted as successes.	At the 2 year time point; Egg OIT participants must be approximately 4-6 weeks post-discontinuation of therapy

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percent of Participants Who Successfully Consumed 5,000 mg of Egg White Solid	Desensitization assessment: Participants who successfully consumed without dose-limiting symptoms 5,000 mg of egg white solid during a double-blind placebo-controlled oral food challenge were counted as successes.	Following the blinded desensitization phase at approximately Week 44
Percent of Participants Who Successfully Consumed a 50 mg Dose at Initial Escalation	On the initial day of dosing, participants were offered 0.1 mg of egg white solid or placebo followed by an approximate doubling every 30 minutes up to a 50 mg dose providing limiting reactions do not occur.	Initial day of dosing
Percent of Participants Who Achieved a Maintenance Dose of 2,000 mg	For participants whose maximum tolerated dose on the initial escalation day was less than 50 mg, doses were doubled every 2 weeks up to 50 mg. After 50 mg, dosing was increased to 75 mg, and then dosing increased by 25% until the 2000 mg dose was reached. The maximum time allowed for the build-up phase was 40 weeks; the dose achieved at 40 weeks was considered the maintenance dose.	Following the blinded desensitization phase at approximately Week 44
Number of Participants With Serious Adverse Events (SAEs)	This study graded the severity of Adverse Events experienced by participants according to the criteria set forth in the National Cancer Institute's Common Terminology Criteria for Adverse Events Version 3.	Baseline through the 2-year primary endpoint
Percent of Participants in the Egg OIT Treatment Arm Who Successfully Consumed 10,000 mg of Egg White Solid	Tolerance Assessment: Participants in the Egg OIT treatment arm who were not tolerant at 2 years were offered an additional 2 years of therapy. A 10,000 mg double-blind placebo controlled oral food challenge to egg was done the same way as the one performed at 2 years for these participants in order to identify tolerant individuals in the 2 to 4 year extension segment. The tolerant individuals from this segment were then added to the tolerant individuals from the 2 year segment.	4 years (48 months)

Collaborators and Investigators

• Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
• Collaborators: Consortium of Food Allergy Research
• Investigators: Study Chair: Wesley Burks, MD, University of North Carolina; Study Chair: Stacie Jones, MD, Allergy/Immunology Department, Arkansas Children's Hospital; Principal Investigator: David Fleischer, MD, National Jewish Health

Publications and helpful links

General Publications

• Baral VR, Hourihane JO. Food allergy in children. Postgrad Med J. 2005 Nov;81(961):693-701. doi: 10.1136/pgmj.2004.030288.
• Sicherer SH, Sampson HA. 9. Food allergy. J Allergy Clin Immunol. 2006 Feb;117(2 Suppl Mini-Primer):S470-5. doi: 10.1016/j.jaci.2005.05.048.
• Wood RA. The natural history of food allergy. Pediatrics. 2003 Jun;111(6 Pt 3):1631-7.
• Burks AW, Jones SM, Wood RA, Fleischer DM, Sicherer SH, Lindblad RW, Stablein D, Henning AK, Vickery BP, Liu AH, Scurlock AM, Shreffler WG, Plaut M, Sampson HA; Consortium of Food Allergy Research (CoFAR). Oral immunotherapy for treatment of egg allergy in children. N Engl J Med. 2012 Jul 19;367(3):233-43. doi: 10.1056/NEJMoa1200435.
• Jones SM, Burks AW, Keet C, Vickery BP, Scurlock AM, Wood RA, Liu AH, Sicherer SH, Henning AK, Lindblad RW, Dawson P, Berin C, Fleischer DM, Leung DYM, Plaut M, Sampson HA; Consortium of Food Allergy Research (CoFAR). Long-term treatment with egg oral immunotherapy enhances sustained unresponsiveness that persists after cessation of therapy. J Allergy Clin Immunol. 2016 Apr;137(4):1117-1127.e10. doi: 10.1016/j.jaci.2015.12.1316. Epub 2016 Mar 9.

Study record dates

Study Major Dates

• Study Start: May 1, 2007
• Primary Completion (Actual): December 1, 2010
• Study Completion (Actual): December 1, 2013

Study Registration Dates

• First Submitted: April 16, 2007
• First Submitted That Met QC Criteria: April 16, 2007
• First Posted (Estimate): April 17, 2007

Study Record Updates

• Last Update Posted (Actual): December 13, 2017
• Last Update Submitted That Met QC Criteria: November 15, 2017
• Last Verified: November 1, 2017

More Information

Terms related to this study

• Keywords: Food Allergy; Egg Allergy; Egg Oral Immunotherapy (OIT)
• Additional Relevant MeSH Terms: Immune System Diseases; Hypersensitivity; Food Hypersensitivity; Hypersensitivity, Immediate
• Other Study ID Numbers: DAIT CoFAR3; U19AI066738 (U.S. NIH Grant/Contract); COFAR

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: Yes
• IPD Plan Description: Participant level data and additional relevant materials are available to the public in the Immunology Database and Analysis Portal (ImmPort). ImmPort is a long-term archive of clinical and mechanistic data from DAIT-funded grants and contracts.

Study Data/Documents

1. Individual Participant Data Set
   Information identifier: SDY218
   Information comments: ImmPort study identifier is SDY218
2. Study summary, -design, -adverse events, -demographics,-lab tests,-mechanistic assays, -study files
   Information identifier: SDY218
   Information comments: ImmPort study identifier is SDY218