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Brain gene therapy shows promise for rare childhood disease

NCT ID NCT01801709

Disease control Sponsor: Institut National de la Santé Et de la Recherche Médicale, France Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested a gene therapy for children with early-onset metachromatic leukodystrophy (MLD), a rare and severe brain disease. Five children aged 6 months to 5 years received injections of a harmless virus carrying a working copy of the ARSA gene directly into their brains. The goal was to see if the treatment is safe and can slow the disease's progression.

What this could mean

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

Active substance
gene therapy (AAVrh.10cuARSA)
What this could lead to
If successful, this could slow or stop the progression of metachromatic leukodystrophy in young children, potentially preserving motor and cognitive function.
What could go wrong
This is a very early, small trial (only 5 children) with no control group. The treatment involves direct brain injections, which carry risks like infection or brain injury. It may not work or could have unknown side effects.

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 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

5 people

The number who actually took part.

Started

Jun 2014

Finished

Dec 2022

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

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

Ages

6 months to 5 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: * Boys or girls with an early onset form of MLD. * Age between 6 months and 5 years, inclusive * Diagnostic of MLD based on the measurement of ARSA activity in leukocytes and the accumulation of sulfatides in urine, along with normal activity of at least one other sulfatase * Informed consent signed up and willingness for monitoring 2 years after treatment. * Normal values for standard laboratory tests Exclusion Criteria: * Absence of ARSA protein by immunocytochemistry and/or ELISA * Gestational age \<32 weeks of amenorrhoea and age \< 1 year * Brain atrophy with a subdural space \> 10 mm in the frontal region * Performance IQ\<50 at WPPSI-III or cognitive function \< 3rd percentile at the Bayley's test of infant development * If age \> 16 months at inclusion, inability to walk few steps alone OR inability to walk few steps with support on one side along with inability to stand up alone * Impossibility for anesthesia * Malignancy, cardiac malformation, liver dysfunction, or renal dysfunction * Neurological disorder, except benign, not related to MLD. * Any other clinically significant untreated co-morbid medical condition as determined by the clinical investigator, including cardiac, pulmonary or kidney disease. * MRI impossibility * Evoked potential impossibility * Participation to another therapeutic clinical trial for MLD. * Unaffiliated to any French or any other National Health Insurance.

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Conditions

The condition(s) this trial relates to.

metachromatic leukodystrophy

As listed by the trial registrant

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

Metachromatic leukodystrophy

Contacts and locations

Locations

  • Bicêtre Hospital - Paris Sud

    Le Kremlin-Bicêtre, France

More trials for these conditions

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