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New global registry aims to unlock secrets of rare brain disease DRPLA

NCT ID NCT05489393

Knowledge-focused Sponsor: CureDRPLA Source: ClinicalTrials.gov ↗

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 creates a worldwide database for people with DRPLA, a rare genetic brain disorder. Participants or their caregivers fill out questionnaires about symptoms, daily life, and disease impact. The goal is to gather information to help researchers better understand DRPLA and connect patients with future clinical trials.

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 100 people

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

Started

Mar 2021

Expected to finish

Nov 2031

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

DRPLA is a very rare neurodegenerative disorder that is inherited in a dominant autosomal manner. The atrophin-1 gene (ATN1) is the only gene known to cause DRPLA. ATN1 mutations cause CAG repeat expansions in exon 5, which are typically present at ≤ 35 repeats. DRPLA is caused by a (CAG)n repeat expansion of more than ≥48 tandem copies, resulting in an expanded polyglutamine tract in the atrophin-1 protein. DRPLA shows a strong ethnic predilection for Asian, particularly Japanese populations. In the Japanese population, DRPLA has been estimated to have an incidence of 2 to 7 per million people.

Ages

0 to 100 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 of all ages with a self-reported diagnosis of DRPLA. * Understand and sign the informed consent form (IFC). Participants who lack the capacity to consent (e.g. cognitively impaired individuals) will require consent from the legal authorized representative, and the assent of the subject will be obtained to the extent compatible with their capacity. Participants at age 12 to age of consent will require assent along with the consent of their parent or legal guardian. Exclusion Criteria: * Ataxia conditions other than DRPLA. * Failure to sign the IFC (and assent form, as needed).

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Conditions

The condition(s) this trial relates to.

dentatorubral-pallidoluysian atrophy

As listed by the trial registrant

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

DRPLA

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

  • CureDRPLA

    RECRUITING

    New York, New York, 11231, United States