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Could a simple sugar help people with rare brain disorder?

NCT ID NCT07432490

Disease control Sponsor: Oregon Health and Science University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether a sugar called L-fucose can improve movement and coordination in adults with GLUT1 deficiency syndrome, a rare genetic disorder that affects the brain's energy supply. Sixteen participants will receive either fucose or a placebo for a period, then switch, so everyone gets both. The main goal is to see if fucose reduces symptoms like unsteadiness and difficulty with movement.

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.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 16 people

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

Started

May 2026

Expected to finish

Aug 2027

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.

Ages

18 years and older

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. Age ≥ 18 years 2. Confirmed diagnosis of GLUT1DS, including at least 2 out of the following 3: molecular genetic testing showing a pathogenic or likely pathogenic variant in SLC2A1; documented hypoglycorrhachia with a CSF:blood glucose ratio ≤ 0.6; clinical features consistent with GLUT1DS (epilepsy, movement disorders, ataxia, intellectual disability, dysarthria) 3. Presence of ataxia Exclusion Criteria: 1. Inability to swallow liquids 2. Change in neurological medications (either medication itself or medication dosages) in the past 90 days 3. Use of fucose- or mannose-containing supplements within one year of enrollment 4. Presence of hepatic, renal, hematological, or concomitant metabolic disorders, as assessed by the presence of a previous diagnosis of such disorders (for instance, chronic kidney disease, liver cirrhosis, diabetes mellitus) or by the following laboratory values, which will be considered if obtained clinically up to 90 days before enrollment (if this is not available, laboratory tests will be obtained prior to first study visit): 1. Any degree of hepatic impairment based on the Child-Pugh classification 2. eGFR (as measured by serum creatinine or cystatin C) \< 60 mg/min/1.73m2 3. Hemoglobin A1c \> 6.5% 4. Hemoglobin level below the lower limit of normal (LLN) for sex and age 5. Platelet counts below the LLN for sex and age 5. Subjects who are pregnant, breastfeeding, or planning to become pregnant within one year of enrollment 6. Enrollment in an investigational new drug trial for G1DS within one year of enrollment

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Conditions

The condition(s) this trial relates to.

encephalopathy due to GLUT1 deficiency GLUT1 deficiency syndrome

As listed by the trial registrant

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

GLUT1 deficiency GLUT1DS1

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

  • Oregon Health and Science University

    RECRUITING

    Portland, Oregon, 97239, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.