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Bacteria in mouth and gut may hold clues to colon polyp risk

NCT ID NCT07290023

Knowledge-focused Sponsor: Hospital Universitari Vall d'Hebron Research Institute Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at the bacteria in the mouth and gut of 126 people with and without serrated polyposis syndrome, a condition that raises the risk of colorectal cancer. Researchers compared the bacteria in people with the syndrome to those with other types of polyps or no polyps at all. The goal was to find differences that might explain why some people develop this condition, which could lead to better screening or prevention in the future.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

126 people

The number who actually took part.

Started

Jan 2021

Finished

Jan 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Gastroenterology consultations patients.

Ages

18 to 90 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: \- Individuals who meet the diagnostic criteria for serrated polyposis syndrome and who have a recent colonoscopy (\<3 months) in which at least one serrated lesion is resected (defined as hyperplastic polyp or sessile serrated lesion / polyp) proximal to the rectum ≥ 5 mm. 2\) Individuals who have a recent colonoscopy (\<3 months) in which it is at least dry a serrated lesion proximal to the rectum ≥ 5 mm. Must not present ≥ 5 serrated lesions metachronous or synchronous. 3) Individuals who have had a recent colonoscopy (\<3 months) with resection of the less one adenoma ≥ 5 mm. 4) Individuals who have had a recent colonoscopy (\<3 months) without polyps. Exclusion Criteria: * Suspicion of hereditary syndromes of predisposition to CRC (\> 20 metachronous adenomas, Familial adenomatous polyposis, Lynch syndrome, Peutz-Jeghers syndrome, Cowden, juvenile polyposis). * Consumption of antibiotics, probiotics or prebiotics in the last 3 months. * Incomplete colonoscopy or with inadequate preparation in some section. * Adenomatous, serrated or indeterminate polyps synchronous in the inclusion colonoscopy except in the group of serrated polyposis syndrome. * Colorectal cancer or hamartomatous polyps in inclusion colonoscopy.

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Conditions

The condition(s) this trial relates to.

colon serrated polyposis colorectal cancer colorectal neoplasm hyperplastic polyposis syndrome

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Colorectal cancer Intestinal microbiota Serrated polyposis syndrome

Contacts and locations

Locations

  • Lara Aguilera Castro

    Barcelona, Barcelona, 08035, Spain

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