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Genetic clues may predict gallstone trouble after bariatric surgery

NCT ID NCT07702630

Knowledge-focused Sponsor: Esbjerg Hospital - University Hospital of Southern Denmark Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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
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 Results may not be published yet.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)

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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

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Status unknown
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First seen Jul 14, 2026 · Last updated Jul 17, 2026 · Updated 2 times

Summary

This study investigates whether two specific gene variants (ABCG8 and UGT1A1) are linked to gallstone disease that requires gallbladder removal after bariatric surgery. Researchers compare adults who had weight-loss surgery and later needed their gallbladder removed with those who did not develop gallstones. Participants provide a blood sample for genetic testing and complete health questionnaires.

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

About 270 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Oct 2026

An estimate. Start dates often move.

Expected to finish

Mar 2029

An estimate. End dates often move.

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

Adults who previously underwent bariatric surgery in the Region of Southern Denmark will be included. The study population consists of two groups: cases and controls. Cases are patients who underwent bariatric surgery and subsequently underwent cholecystectomy due to gallstone disease. Controls are patients who underwent bariatric surgery and have had at least five years of follow-up without registered gallstone disease or cholecystectomy. All participants will be identified through hospital records in the Region of Southern Denmark. Participants will provide a blood sample for targeted genetic analysis of selected variants in ABCG8 and UGT1A1 and complete questionnaires on health, medication use, family history, and gastrointestinal quality of life.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Bariatric surgery Exclusion Criteria: * Gallstone disease or cholecystectomy prior to bariatric surgery

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Conditions

The condition(s) this trial relates to.

cholelithiasis gallstones

As listed by the trial registrant

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

Bariatric surgery Cholecystectomy Gallstone disease Genetics Metabolic surgery

How to take part

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  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

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