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Gene therapy trial offers hope for babies with rare, deadly metabolic disease

NCT ID NCT06255782

Disease control Sponsor: iECURE, Inc. 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 13, 2026 · Updated 2 times

Summary

This study tests a one-time gene therapy called ECUR-506 in baby boys under 9 months old with a severe form of OTC deficiency, a genetic disorder that prevents the body from breaking down ammonia. The goal is to see if the treatment is safe and can reduce dangerous ammonia levels, potentially allowing babies to stop taking daily medications. The trial involves up to 20 participants and will monitor for side effects and effectiveness over time.

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 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

About 20 people

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

Started

Apr 2024

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Ages

24 hours to 7 months

Sex

Male participants only

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.

Key Inclusion Criteria: 1. Male sex 2. Gestational or adjusted (corrected) gestational age ≥ 37 weeks 3. Age at screening is 24 hours to 7 months 4. Weight ≥ 3.5 kg and ≤ 13.5 kg at screening 5. Has received age-appropriate vaccinations 6. Genetically confirmed OTCD defined by genetic confirmation of an OTC variant (pathogenic or likely pathogenic) associated with severe neonatal OTCD defined below in Inclusion Criteria #7 or has the same OTC variant as a family member who had severe neonatal OTCD within first week of life. 7. Severe neonatal OTCD defined by hyperammonemic crisis with elevated ammonia level of \>560 μmol/L and clinical symptoms within first week of life, and currently receiving treatment with both dietary protein restriction and nitrogen scavenger therapy. 8. Current or historical biochemical profile consistent with OTCD 9. Participant's parent(s)/LAR must be able to comprehend and be willing to provide a signed IRB/IEC-approved ICF. Key Exclusion Criteria: 1. Neonatal diagnosis of severe to profound Hypoxic Ischemic Encephalopathy due to birth injury 2. Requiring urgent liver transplant due to liver failure as assessed by the PI. 3. Contiguous gene deletion involving the OTC gene and including at least the CYBB gene on the telomeric side or the TSPAN7 gene on the centromeric side. 4. Known or suspected major organ injury/dysfunction/anomalies. 5. Vital sign and laboratory abnormalities outside of reference ranges. 6. Treatment with any other gene therapy or gene editing therapy 7. Co-enrollment in any other study unless approved by the sponsor. 8. Any condition, that in the opinion of the Investigator, would compromise the safety of the participant or study data 9. Documented vertical transmission of HepA/HepB/HepC 10. Documented in-utero teratogen, substance, and/or alcohol exposure, which in the opinion of the Investigator may increase the participant's risk of developmental delays, congenital anomalies, and/or significant medical complications

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Conditions

The condition(s) this trial relates to.

Brain Diseases, Metabolic Brain Diseases, Metabolic, Inborn brain disorder central nervous system disorder hereditary disease Hyperammonemia inborn disorder of amino acid metabolism inborn errors of metabolism liver disorder metabolic disease nervous system disorder ornithine carbamoyltransferase deficiency urea cycle disorder X-linked disease

As listed by the trial registrant

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

Ornithine carbamoyltransferase deficiency (disorder) Ornithine transcarbamylase deficiency Ornithine transcarbamylase deficiency disease Urea cycle disorders, inborn

How to take part

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

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    10 sites in 3 countries. The list below names each one and where it is.

  3. 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 ↗

  4. 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

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • Ann & Robert H. Lurie Children's Hospital of Chicago

    RECRUITING

    Chicago, Illinois, 60611, United States

  • Children's Hospital of Colorado, Anshutz Medical Campus

    RECRUITING

    Aurora, Colorado, 80045, United States

  • Emory University School of Medicine

    RECRUITING

    Atlanta, Georgia, 30322, United States

  • Great Ormond Street Hospital

    RECRUITING

    London, United Kingdom

  • Hopsital Sant Joan de Deu

    RECRUITING

    Barcelona, 08950, Spain

  • Hospital Universitario 12 de Octubre

    RECRUITING

    Madrid, 28041, Spain

  • Icahn School of Medicine at Mount Sinai

    RECRUITING

    New York, New York, 10029, United States

  • Oregon Health and Science University

    RECRUITING

    Portland, Oregon, 97239, United States

  • The Children's Hospital at Westmead

    ACTIVE_NOT_RECRUITING

    Sydney, New South Wales, Australia

  • The Newcastle upon Tyne Hospitals NHS Foundation Trust- Great North Children's Hospital

    RECRUITING

    Newcastle upon Tyne, United Kingdom

  • The Royal Children's Hospital

    ACTIVE_NOT_RECRUITING

    Melbourne, Victoria, 3052, Australia

  • UCLA Mattel Children's Hospital

    RECRUITING

    Los Angeles, California, 90095, United States

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