Esophageal String Test in Eosinophilic Esophagitis

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

ACTIVE_NOT_RECRUITING

Total Enrollment

440 participants

Study Classification

OBSERVATIONAL

Study Start Date

2009-01-31

Study Completion Date

2025-01-31

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

The overall goal of this study is to develop a novel minimally invasive device, the Esophageal String Test (EST) to monitor esophageal inflammation during treatment of the rare disease Eosinophilic Esophagitis (EoE) in a safe and efficacious manner.

This study is broken down into 2 specific aims:

Specific Aim 1: Identify the EoE Biomarker Panel (EBP) that will improve the sensitivity and specificity of the EST for documenting esophageal inflammation in a 1-hour time point.

Specific Aim 2: Validate the ability of the EST EBP to monitor therapeutic efficacy in a 1-hour sampling time.

Funding Source - FDA OOPD

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Use of Esophageal String Test to Understand Symptoms, Inflammation, and Function in Eosinophilic Esophagitis

NCT03305653

Eosinophilic Esophagitis

COMPLETED NA

Non-endoscopic Tracking of Disease Activity in Eosinophilic Esophagitis

NCT03834298

Eosinophilic Esophagitis

WITHDRAWN NA

Mucosal Impedance Balloon in Diagnosis and Treatment of Eosinophilic Esophagitis (EoE)

NCT02995395

Eosinophilic Esophagitis Healthy

COMPLETED

Inflammatory Mediators as Potential Non-Invasive Biomarkers in Subjects With Eosinophilic Esophagitis

NCT03822325

Eosinophilic Esophagitis

ACTIVE_NOT_RECRUITING

Metabolomic Profiling of Eosinophilic Esophagitis

NCT03803527

Eosinophilic Esophagitis

WITHDRAWN NA

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Eosinophilic esophagitis (EoE) is an increasingly recognized rare disease of children and adults characterized by symptoms including nausea, vomiting, abdominal pain, dysphagia and food impaction that occur in conjunction with esophageal eosinophilia. To date, the only method to make EoE diagnoses and follow treatment responses in EoE is invasive endoscopy with biopsy. While endoscopy is generally safe, an accurate, less invasive, inexpensive, comprehensive and durable test is urgently needed to determine therapeutic efficacy. To address this need, the investigators will use a novel application of an existing technology, the Enterotest™ (a string-based test used to detect intestinal Giardiasis), to measure esophageal inflammation (herein termed the Esophageal String Test - EST). The investigators supportive Preliminary Data provide proof-of-principle for the ability of ESTs to capture esophageal inflammatory mediators in luminal samples from patients affected with EoE. The investigators prospective study demonstrates that: (1) levels of eosinophil-derived granule proteins (MBP1, EDN, ECP, EPX, CLC/Gal-10) in esophageal mucosal biopsies correlate with levels quantitated in EST-captured samples, i.e., levels in luminal secretions captured by the EST correlate with mucosal inflammation, and (2) these luminal biomarkers of eosinophilic inflammation significantly correlate with EoE disease activity. These findings provide strong support for using ESTs as novel minimally invasive instruments to monitor therapeutic efficacy in EoE. The global objective of this project is therefore to bring the "Esophageal String Test" (EST) to commercialization, so that it can be used to monitor therapeutic efficacy in children and adults with EoE. The investigators hypothesize that ESTs will capture an EoE Biomarker Panel (EBP) reflective of disease activity. The Specific Aims are to: (1) Identify an EoE Biomarker Panel (EBP) that will improve the sensitivity and specificity of the EST for monitoring disease activity and (2) Validate the ability of the EST EBP to monitor therapeutic efficacy in 1-hour sampling time. The investigators supportive Preliminary Data demonstrate the feasibility of using ESTs in both children and adults with EoE to measure disease activity (esophageal inflammation) in an overnight (12-hour) test, and shorter time periods, currently performed before a scheduled endoscopy with biopsy. In this project, The investigators propose to shorten this time frame to a 1-hour test, a clinically relevant time point that will markedly facilitate its use and potential impact in the outpatient clinic setting.

Public Health Relevance/Impacts: At least four major impacts should result from these studies:

(1) Identification of an EBP will permit monitoring of esophageal inflammation in EoE; (2) the EBP will be relevant to following disease progression, treatment responses, management and pathogenesis of EoE, (3) validation of the EST EBP will enable development of rapid and inexpensive assays to follow treatment responses, thus reducing the number of follow-up endoscopies with biopsy that are currently performed, and (4) provide a device to monitor EoE disease activity where endoscopy with biopsy may not be available or affordable.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Eosinophilic Esophagitis

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Observational Model Type

OTHER

Study Time Perspective

PROSPECTIVE

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

EoE active disease

Inflammation as defined by \>15 eos / HPF

No interventions assigned to this group

EoE remission

No inflammation in EoE patients after treatment

No interventions assigned to this group

normal control

No inflammation

No interventions assigned to this group

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

* Patients undergoing esophagogastroduodenoscopy (EGD) at Children's Hospital Colorado, or
* Patients from a participating site in whom an inflammatory GI disease is suspected.
* Patients with symptoms of:

1. abdominal pain,
2. vomiting,
3. growth delay, or
4. malabsorption for which an etiology has not been determined.
* Patients with chronic eosinophilic esophagitis (EoE) in whom symptoms suggest ongoing inflammation.

Exclusion Criteria

* Patients suffering from bleeding diathesis, or any other comorbid condition which their doctor feels may put them at additional risk.
* Patients with a family history of connective tissue disease.
* Patients undergoing a therapeutic endoscopy (such as dilatation, sclerotherapy, variceal banding).
* Patients with a history of:

1. esophageal stricture, or
2. surgery such as fundoplication, or
3. allergy to gelatin, or
4. inability to swallow pills.

Minimum Eligible Age

7 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes