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CompletedNCT02513784MouthwashUpdated Sep 22, 2022Results posted

Trial to Assess the Effects of an Antimicrobial Mouthwash on the Esophageal Microbiome

An interventional study of Chlorhexidine gluconate in Esophageal Adenocarcinoma, Barrett's Esophagus and Reflux Esophagitis, sponsored by Columbia University. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-09-22.

Sponsored by Columbia University · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This is a randomized, open-label pilot study to assess whether treatment with chlorhexidine mouthwash can alter the esophageal and gastric cardia microbiome

Read the detailed description

Patients scheduled for upper endoscopy for clinical indications will be randomized to 3 weeks of either no treatment or use of twice daily chlorhexidine mouthwash leading up to the endoscopy. There will be 2-3 study visits, at Day 0 and Day 21, and for those subjects in the mouthwash arm, a final visit 1-2 weeks following the Day 21 visit. Subjects will be required to fast overnight prior to the visits on Days 0 and 21.

02

Conditions studied

  • Esophageal Adenocarcinoma
  • Barrett's Esophagus
  • Reflux Esophagitis

Keywords

  • Microbiome
  • Esophagus
  • Endoscopy
  • Mouthwash
03

In context

Adenocarcinoma Of Esophagus

126 studies on the registry are indexed under Adenocarcinoma Of Esophagus; 72 are open to participants now.

This study's enrollment of 20 is below the median of 74 across 110 interventional studies indexed under Adenocarcinoma Of Esophagus.

Browse Adenocarcinoma Of Esophagus studies →

Lead sponsor

Columbia University is the lead sponsor of 1,135 studies on the registry; 195 are open to participants now.

Of its 179 completed or terminated interventional studies of FDA-regulated products, 146 (82%) have results posted.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age >18
  • Scheduled for upper endoscopy for clinical indications
  • No allergy or other contraindication to chlorhexidine

Exclusion criteria

Exclusion Criteria:

  • Use of proton pump inhibitors or H2 receptor antagonists within 1 month of enrollment. Acid suppressant medications raise the gastric pH and can dramatically alter the gastric and esophageal microbiome.
  • History of upper gastrointestinal cancer
  • History of histologically proven Barrett's esophagus
  • History of antireflux or bariatric surgery, or other gastric or esophageal surgery
  • Use of antimicrobial mouthwash within 1 month of enrollment
  • Use of antibiotics or immunosuppressant medications within 3 months of enrollment
  • Use of steroid inhalers or nasal sprays within 1 month of enrollment
  • HIV or other immunosuppressed states or conditions (e.g. active malignancy)
  • Pregnant or breast feeding
  • Inability to give informed consent
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Antibacterial mouthwash

    Subjects will be randomized to twice daily chlorhexidine gluconate mouthwash for 21 days.

    Drug: Chlorhexidine gluconate

  • No intervention
    No intervention

    Subjects will be randomized to no intervention for 21 days.

Interventions

  • Chlorhexidine gluconate is a germicidal mouthwash that reduces bacteria in the mouth.

    Also known as: Peridex

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What researchers measure

Primary outcomes

  1. Reduction of F. Nucleatum in Saliva

    Within individual change in relative abundance of F nucleatum in oral samples

    Time frame: 21 days

  2. Difference in Esophageal F. Nucleatum Between Experimental Group and no Intervention Group

    Comparison of relative abundance of esophageal F. nucleatum in the mouthwash group vs. the no intervention group.

    Time frame: 21 days

07

Results

Posted Sep 22, 2022
Limitations and caveats
There were no indications for repeated endoscopies, so the analysis of the esophagus was limited to a single point in time; relatively small sample size.

Participant flow

Participant flow — Overall Study
MilestoneAntibacterial MouthwashNo Intervention
Started1010
Completed1010
Not completed00

Outcome measures

PrimaryReduction of F. Nucleatum in Saliva

Within individual change in relative abundance of F nucleatum in oral samples

Time frame:
21 days

No measurements were reported for this outcome.

PrimaryDifference in Esophageal F. Nucleatum Between Experimental Group and no Intervention Group

Comparison of relative abundance of esophageal F. nucleatum in the mouthwash group vs. the no intervention group.

Time frame:
21 days

No measurements were reported for this outcome.

Adverse events

Collected over 21 days. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Antibacterial Mouthwash0/10 (0%)0/10 (0%)0/10 (0%)
No Intervention0/10 (0%)0/10 (0%)0/10 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)Antibacterial MouthwashNo InterventionTotal
Mean53.5 ± 12.951.2 ± 15.552.4 ± 13.9
Sex: Female, Male
Sex: Female, Male(Participants)Antibacterial MouthwashNo InterventionTotal
Female6612
Male448
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Antibacterial MouthwashNo InterventionTotal
Hispanic or Latino8917
Not Hispanic or Latino213
Unknown or Not Reported000
Region of Enrollment
Region of Enrollment(Participants)Antibacterial MouthwashNo InterventionTotal
United States101020
Proton Pump Inhibitor (PPI) Use
Proton Pump Inhibitor (PPI) Use(Participants)Antibacterial MouthwashNo InterventionTotal
Count of participants5510
Aspirin Use
Aspirin Use(Participants)Antibacterial MouthwashNo InterventionTotal
Count of participants448
Ever Smoker
Ever Smoker(Participants)Antibacterial MouthwashNo InterventionTotal
Count of participants336
Gastroesophageal Reflux Disease (GERD) History
Gastroesophageal Reflux Disease (GERD) History(Participants)Antibacterial MouthwashNo InterventionTotal
Count of participants7916

6 further baseline measures are reported on the registry.

08

Study locations

1 site
  • Columbia University Medical Center
    New York, New York 10032, United States
09

References and documents

Publications

  • Annavajhala MK, May M, Compres G, Freedberg DE, Graham R, Stump S, Que J, Korem T, Uhlemann AC, Abrams JA. Relationship of the Esophageal Microbiome and Tissue Gene Expression and Links to the Oral Microbiome: A Randomized Clinical Trial. Clin Transl Gastroenterol. 2020 Dec;11(12):e00235. doi: 10.14309/ctg.0000000000000235. PubMed 33512805 ↗

Study documents

  • Protocol and statistical analysis plan · Mar 11, 2021

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Aug 2015, a primary completion of Dec 2017 and a completion of Dec 2017. It does not say whether these dates are actual or estimated.

Results were first posted in Sep 2022, 4 years 9 months after primary completion. A results delay was requested in Jul 2019.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 30, 2015
First posted
Aug 3, 2015
Start
Aug 2015
Primary completionActual
Dec 2017
CompletionActual
Dec 2017
Results delay requested
Jul 26, 2019
Results first posted
Sep 22, 2022
Last update
Sep 22, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 22, 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
NCT02513784
Responsible party
Sponsor
First posted
Aug 3, 2015
Start date
Aug 2015
Primary completion
Dec 2017
Completion
Dec 2017
Results posted
Sep 22, 2022
Last update
Sep 22, 2022

Study contacts

Julian A. Abrams, MD, MS
principal investigator · Assistant Professor of Medicine and Epidemiology

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

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

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Discussion

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Studies of the drug tested here: Chlorhexidine gluconate

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