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Colonoscopy may detect Parkinson's before symptoms worsen

NCT ID NCT07217054

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at whether a protein linked to Parkinson's disease can be found in colon tissue samples taken during a routine colonoscopy. Researchers will compare samples from people with Parkinson's, those with REM sleep behavior disorder, and healthy individuals. The goal is to see if this method could lead to earlier diagnosis and treatment.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could lead to a simple, early test for Parkinson's disease using tissue from a routine colonoscopy.
What could go wrong
This is a small, early observational study with only 40 participants. It may not prove the test works reliably for everyone.

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 40 people

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

Started

Nov 2025

Expected to finish

Oct 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 with clinically confirmed Parkinson's disease or REM Sleep Behavior Disorder who are undergoing routine colonoscopies for standard medical care. Participants must be able to provide informed consent and understand that participation is voluntary and for research purposes.

Ages

40 to 99 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: 1. Relatively healthy men and women ≥40-99 years of age 2. Patients with a diagnosis of 1. Clinically confirmed PD or 2. Clinically confirmed RBD with no diagnosis of PD, DLB or MSA 3. Patients must have agreed to undergo a routine colonoscopy as part of their screening or surveillance for colon cancer or for diagnostic purposes for the exclusion of other GI diseases Exclusion Criteria: 1. Use of anticoagulants (Plavix or aspirin alone is allowed) 2. Under active treatment for colon cancer; 30-day post anti-cancer treatment allowed 3. Current, ongoing gastrointestinal illness 4. Recent intrabdominal surgery 5. Pregnant or planning to become pregnant before the scheduled colonoscopy 6. Significant cognitive impairment, as determined by study investigators

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. 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 ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Digestive Disease Associates

    RECRUITING

    Branford, Connecticut, 06405, United States

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