CClinicalTrials.gg
CompletedNCT02776982Updated Feb 9, 2022

Influence of Central Obesity on the Esophageal Epithelial Barrier

An interventional study of Confocal endomicroscopy and Mucosal impedance in Gastroesophageal Reflux and GERD, sponsored by Mayo Clinic. Completed at 1 site in United States. Open to participants aged 18 Years to 85 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-02-09.

Sponsored by Mayo Clinic · Not applicable, Interventional, and Diagnostic

Phase
Not applicable
Study type
Interventional
Enrollment
38
Allocation
Not applicable
Ages
18 Years to 85 Years
Sex
All
01

Study summary

This study is being done to help understand why some people with an increased amount of central obesity, without gastroesophageal reflux, develop changes to the lining of their esophagus that can potentially lead to esophageal adenocarcinoma (cancer).

02

Conditions studied

  • Gastroesophageal Reflux
  • GERD

Keywords

  • Gastroesophageal reflux disease
  • GERD
  • Barrett's Esophagus
  • Esophageal adenocarcinoma
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In context

Gastroesophageal Reflux

1,067 studies on the registry are indexed under Gastroesophageal Reflux; 188 are open to participants now.

This study's enrollment of 38 is below the median of 72 across 712 interventional studies indexed under Gastroesophageal Reflux.

Browse Gastroesophageal Reflux studies →

Lead sponsor

Mayo Clinic is the lead sponsor of 3,218 studies on the registry; 670 are open to participants now.

Of its 445 completed or terminated interventional studies of FDA-regulated products, 313 (70%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 85 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

Participants who are undergoing clinically indicated upper endoscopy with Bravo ambulatory pH capsule (off reflux medications for 7 days), in the Esophageal Clinic at Mayo Clinic.

Exclusion criteria

Exclusion Criteria:

  1. Pre-existing or suspected Barrett's Esophagus (> 1cm of columnar mucosa in esophagus on endoscopy
  2. Oral anticoagulation precluding endoscopic biopsies
  3. Patients with known hypersensitivity to fluorescein sodium.
05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
38 participants (actual)

Study arms

  • Other
    Research procedures

    Participants enrolled in study will have confocal endomicroscopy, research biopsies, mucosal impedance, and Bravo ambulatory pH capsule performed at the time of clinically indicated endoscopy.

    Procedure: Confocal endomicroscopy · Procedure: Mucosal impedance · Procedure: Research biopsies · Procedure: Bravo ambulatory pH monitor

Interventions

  • ProcedureConfocal endomicroscopy

    Confocal endomicroscopy will be performed during clinically indicated endoscopy.

  • ProcedureMucosal impedance

    Mucosal impedance will be performed at the time of clinically indicated endoscopy.

  • ProcedureResearch biopsies

    Research biopsies will be obtained during clinically indicated endoscopy.

  • ProcedureBravo ambulatory pH monitor

    Bravo ambulatory pH capsule will be placed during clinically indicated endoscopy.

06

What researchers measure

Primary outcomes

  1. Compare intercellular space dilation as a marker for apical junction complex integrity in esophageal squamous epithelium by using transmission electron microscopy in those patients with/without gastroesophageal reflux and with/without central obesity.

    Time frame: One year

Secondary outcomes

  1. Compare paracellular permeability of esophageal squamous epithelium by measuring mucosal impedance and IV fluorescein leak using a confocal laser endomicroscope in those patients with/without gastroesophageal reflux and with/without central obesity.

    Time frame: One year

  2. Compare the prostaglandin E2 level as measured by enzyme immunoassay in esophageal squamous epithelium in those patients with/without gastroesophageal reflux and with/without central obesity.

    Time frame: One year

07

Study locations

1 site
  • Mayo Clinic
    Rochester, Minnesota 55905, United States
08

References and documents

Publications

  • Gibbens YY, Lansing R, Johnson ML, Blevins CH, Katzka DA, Iyer PG. Effects of Central Obesity on Esophageal Epithelial Barrier Function. Am J Gastroenterol. 2021 Jul 1;116(7):1537-1541. doi: 10.14309/ajg.0000000000001196. PubMed 33955725 ↗

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 9, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02776982
Lead sponsor
Mayo Clinic
Responsible party
Prasad G. Iyer (MD, Mayo Clinic) — Principal investigator
First posted
May 19, 2016
Start date
Nov 2016
Primary completion
May 16, 2019
Completion
May 16, 2019
Last update
Feb 9, 2022

Study contacts

Prasad G Iyer, MD
principal investigator · Mayo Clinic

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 2022. You cannot join it, but the record below documents what was studied.

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