Tolerability of Baked Dairy Protein in Eosinophilic Esophagitis Patients With Cow Milk Protein Trigger

Eosinophilic esophagitis (EoE) is a chronic immune mediated disease characterized by eosinophilic infiltration in esophageal epithelium and resulting in esophageal dysfunction.

While the exact pathogenesis is yet to be elucidated, EoE is considered an atopic disease. This classification is in part due to the inflammatory infiltrate of eosinophils, basophils and T-cells producing Th2 cytokines, yet it may also be triggered by environmental allergens. In addition, the rates of atopy are approximately 3 times higher in patients with EoE than in the general population. Furthermore, and most convincing, EoE is successfully managed with dietary exclusion of triggering groups in both pediatric and adult patients, further confirming the atopic nature of the disease.

The most frequent dietary trigger for EoE is milk, but there is limited data on the effect of baked dairy . Guidelines addressing the diagnosis and treatment of EoE in both children and adults have not addressed the use of baked dairy in patients with cow's milk triggered EoE.

Restrictive diets are often challenging for patients and contribute to a reduced quality of life. Some patients tolerate baked dairy products, which are less allergenic due to denaturation of proteins through heat. The potential for baked dairy to be included in the diet of milk-triggered EoE patients remains unexplored in current guidelines.

The aim of this study is to assess tolerability and safety of baked dairy in patients with EoE in whom cow's milk has been confirmed to be a trigger food for their disease.

Study Overview

• Status: Enrolling by invitation
• Conditions: Eosinophilic Esophagitis (EoE)
• Intervention / Treatment: Other: baked milk product diet

Detailed Description

This prospective, multi-center trial will include patients with EoE diagnosed according to the accepted definitions: symptoms of esophageal dysfunction and >15 Eos/HPF on an esophageal biopsy, who were confirmed to have cow's milk as a trigger by demonstrating improvement during elimination and histologic relapse following reintroduction.

Following full informed consent of the patient / guardians, patients will be offered to join the trial to assess their tolerance to baked dairy.

Due to the theoretical risk of developing IgE-mediated allergy on prolonged food protein type restriction, RAST-testing or skin-prick testing to cow milk will be undertaken to exclude IgE-mediated sensitization prior to introduction of baked daury. In patients with positive results, candidates can elect to withdraw from the study or alternatively an allergist will be consulted to consider the appropriateness of a medically observed baked dairy challenge.

Strict compliance with milk-free diet will be re-enforced for not less than 6 weeks prior to the patient's closest routine follow-up endoscopy. Baseline symptom profile will be recorded. Baseline endoscopy with routine biopsies (defined below) will be performed as part of the routine scheduled follow-up endoscopy as recommended by guidelines, in order to confirm histologic remission of EoE. Patients with baseline esophageal inflammation will be excluded from the study. Patients in histologic remission will be commenced on bake dairy containing diet with not less than 1 daily serving.

Repeat symptom profile assessed at 6 weeks and at 12 weeks, with repeat endoscopy with routine biopsies at 12±2 weeks. If symptoms recur prior to 12 weeks, endoscopy may be moved up earlier, from 6 weeks onwards.

Patients in clinical and histologic remission at 12 weeks will be followed until week 52 with repeat scheduled endoscopy. Baked dairy consumption will be permitted during the follow-up, but not be required daily as in the first time period. A baked dairy consumption diary will be collected over the 4 weeks prior to this endoscopy.

• Study Type: Interventional
• Enrollment (Estimated): 20
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Israel
  • Jerusalem, Israel, 91031
    • Shaare Zedek Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• All patients diagnosed with EoE age ≤ 17.5 years at inclusion who were confirmed to have cow's milk as a trigger by demonstrating improvement during elimination and histologic relapse following reintroduction
• Verified histologic remission on milk-free diet on endoscopy prior to intervention
• Proton-pump inhibitors may be used if treatment is maintained at the same dose from the screening endoscopy throughout the trial period, and was used at the time that milk was demonstrated to be the triggering food
• Ability to consent to enrollment in the trial - legal guardians with joint consent for patients >10 years.

Exclusion Criteria:

• Patients with clinical IgE-mediated milk allergy
• Provisional exclusion: patients without a known IgE-mediated allergic reaction to milk who have a positive RAST (as per local reference range) or positive skin-prick test for cow milk or goat milk must be assessed by a certified allergist/immunologist and cleared for the trial by a supervised milk challenge.
• Use of inhaled corticosteroids for more than 5 days per month during the trial period.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Tolerability of baked milk products in eosinophilic esophagitis patients with cow milk trigger; Elimination of none baked cow milk from diet . Baked milk products containing diet.	Other: baked milk product diet; Elimination of none baked cow milk from diet . Baked cow milk containing diet.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Histologic remission rate following 12 weeks exposure to ingested baked dairy products	will be assessed on biopsies collected at week 12 during upper endoscopy	12 weeks exposure to ingested baked dairy products

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Endoscopic remission rate following 12 weeks exposure to ingested baked dairy	endoscopy with routine biopsies at 12 weeks	2 weeks exposure to ingested baked dairy
Endoscopic improvement following 12 weeks exposure to ingested baked dairy	endoscopy with routine biopsies at 12 weeks	12 weeks exposure to ingested baked dairy
Symptom scores following 12 weeks exposure to ingested baked dairy	Symptom profile assessed by PEESSv2.0 at 6 weeks and at 12 weeks, with repeat endoscopy with routine biopsies at 12 weeks	12 weeks exposure to ingested baked dairy
Safety of cow's milk challenge	In patients with any prior suspicion of IgE-mediated cow's milk allergy including any suspicious rash or other symptoms on previous exposure, will be referred to a pediatric immunologist for assessment and consideration of RAST test or skin-prick test, with a supervised challenge, if deemed necessary, prior to enrollment in the trial. Number of participants without a positive RAST test or skin-prick test	36 months

Collaborators and Investigators

• Sponsor: Shaare Zedek Medical Center

Study record dates

Study Major Dates

• Study Start (Actual): March 1, 2025
• Primary Completion (Estimated): December 1, 2030
• Study Completion (Estimated): December 1, 2030

Study Registration Dates

• First Submitted: December 26, 2024
• First Submitted That Met QC Criteria: December 26, 2024
• First Posted (Actual): January 3, 2025

Study Record Updates

• Last Update Posted (Actual): May 22, 2025
• Last Update Submitted That Met QC Criteria: May 19, 2025
• Last Verified: May 1, 2025

More Information

Terms related to this study

• Keywords: Eosinophilic Esophagitis (EoE)
• Additional Relevant MeSH Terms: Immune System Diseases; Digestive System Diseases; Gastrointestinal Diseases; Hypersensitivity, Immediate; Hypersensitivity; Eosinophilia; Leukocyte Disorders; Hematologic Diseases; Esophageal Diseases; Gastroenteritis; Esophagitis; Eosinophilic Esophagitis
• Other Study ID Numbers: EoE tolerability of baked milk

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No