Targeted Elimination Diet in EoE Patients Following Identification of Trigger Nutrients Using Confocal Laser Endomicroscopy

Last updated: June 26, 2024
Sponsor: Universitaire Ziekenhuizen KU Leuven
Overall Status: Active - Recruiting

Phase

1/2

Condition

Heartburn (Pediatric)

Esophageal Disorders

Heartburn

Treatment

personalized exclusion diet based on CLE

empiric exclusion diet

Clinical Study ID

NCT05695456
S66223
  • Ages 18-70
  • All Genders

Study Summary

Using confocal laser endomicroscopy (CLE), gastrointestinal allergic reactions to certain foods in the duodenum will be evaluated on a cellular level. After that, a personalized exclusion diet will be followed based on the CLE results for 6 weeks, sham-controlled, in a cross-over fashion. Gastroscopy with esophageal biopsies will be repeated after each diet.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • Eosinophilic Esophagitis, with peak eosinophil count of >15 eos/HPF and symptoms ofdysphagia at least 2 days per week

  • Patients have had a trial of high-dose PPI for at least 8 weeks, with eitherdocumented non-response or intolerance to the medication

  • Patients aged between 18 and 70 years old

  • Signed written informed consent

  • Eosinophilic Esophagitis, with peak eosinophil count of >15 eos/HPF and symptoms ofdysphagia at least 2 days per week

  • Patients have had a trial of high-dose PPI for at least 8 weeks, with eitherdocumented non-response or intolerance to the medication

  • Patients aged between 18 and 70 years old

  • Signed written informed consent

Exclusion

Exclusion criteria:

  • IgE-mediated food anaphylaxis for 1 of the trigger nutrients

  • History of major gastrointestinal surgery complicating esophago-gastro-duodenoscopy

  • Gastro-esophageal reflux disease (GERD) Los Angeles grade C or D

  • Esophageal strictures, too narrow to pass with a normal gastroscope

  • Endoscopic dilation in the esophagus in the 4 weeks prior to inclusion

  • Celiac disease

  • Recent use (within two weeks) of non-steroidal anti-inflammatory drugs (NSAIDs),systemic histamine-receptor antagonists, mast cell stabilizers, opioids.

  • Proton pump inhibitors must be either stopped for at least 4 weeks, or continued ona stable dosage throughout the study period.

  • Corticosteroids should be stopped for at least 4 weeks.

  • Allergy to fluorescein, Xylocain or Propofol

  • Pregnant or lactating women

Study Design

Total Participants: 25
Treatment Group(s): 2
Primary Treatment: personalized exclusion diet based on CLE
Phase: 1/2
Study Start date:
February 16, 2022
Estimated Completion Date:
December 31, 2024

Study Description

Eosinophilic esophagitis is an antigen driven esophagitis, that is characterized by symptoms of dysphagia often leading to food impaction, and that leads to strictures and esophageal motility disorders, with a significant impact on quality of life. Current treatment options include proton pump inhibitors (PPI's) and topical steroids, and also the empiric 6-food elimination diet (6FED). In this diet, the 6 most frequently implicated foods are excluded and reintroduced one by one (milk, gluten containing grains, egg, soy, nuts, fish & shellfish). However, this is a complicated and long process, including several endoscopies with esophageal biopsies.

Confocal laser endomicroscopy (CLE) is a technique that allows to detect gastrointestinal allergic reactions in the duodenum, and to visualize them on a molecular level in real-time. The CLE probe is passed through the working channel of a standard gastroscope, up against the duodenal mucosa. After intravenous injection of fluorescein as contrast medium, the duodenal epithelium is visualized on a cellular level, including food protein mediated extravasation of fluorescein into the lumen. The 6 foods of the 6FED are sprayed on the epithelium one by one, after which a reaction is awaited. Previous use of CLE has shown that more than half of Eosinophilic esophagitis (EoE) patients reacts to one or more foods during CLE.

In this double blind randomized cross-over study the effect a personalized elimination diet, based on the reaction during CLE, is compared to a sham diet, in patients with eosinophilic esophagitis, and insufficient response or intolerance to PPI's. Both diets will be followed for 6 weeks, after which gastroscopy with esophageal biopsies will be repeated. Patients that do not have a reaction to the 6 foods will act as controls, following a control diet with milk and gluten in a cross-over fashion.

Connect with a study center

  • Jan Tack

    Leuven, Vlaams Brabant 3000
    Belgium

    Active - Recruiting

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