Gene therapy for Crigler-Najjar Syndrome Type I

A Phase I/II, Open Label, Study to Evaluate Safety and Efficacy of an Intravenous Injection of GT-UGT1A1-AAV8-02 (AAV Vector Expressing the UGT1A1 Transgene) in Patients with Crigler-Najjar Syndrome Type I Requiring Phototherapy

Phase1; Phase2 Interventional Federal State Budget Institution Research Center for Obstetrics, Gynecology and Perinatology Ministry of Healthcare · NCT06641154

This study is testing a new gene therapy for young children with Crigler-Najjar Syndrome Type I to see if it can safely help them manage their severe jaundice and improve their health.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Enrollment5 (estimated)
Ages3 Months to 10 Years
SexAll
SponsorFederal State Budget Institution Research Center for Obstetrics, Gynecology and Perinatology Ministry of Healthcare Government
Locations2 sites (Moscow and 1 other locations)
Trial IDNCT06641154 on ClinicalTrials.gov

What this trial studies

This Phase 1/2 clinical trial evaluates the safety and efficacy of an intravenous infusion of GT-UGT1A1-AAV8-02 in children aged 10 years or younger with Crigler-Najjar Syndrome Type I who require phototherapy. Participants will receive a single administration of the gene therapy and will be monitored for safety and efficacy over a period of approximately 60 months. The study aims to address the underlying genetic cause of the disease, which leads to severe jaundice and neurological disorders due to the inability to process bilirubin. The trial is conducted in a multinational setting, focusing on a rare inherited condition with limited treatment options.

Who should consider this trial

Good fit: Ideal candidates are children aged 3 months to 10 years with a confirmed diagnosis of severe Crigler-Najjar Syndrome Type I requiring phototherapy.

Not a fit: Patients who have undergone liver transplantation or have significant underlying liver disease will not benefit from this study.

Why it matters

Potential benefit: If successful, this gene therapy could provide a long-term solution for managing Crigler-Najjar Syndrome Type I, potentially reducing the need for phototherapy and improving quality of life.

How similar studies have performed: While gene therapy for Crigler-Najjar Syndrome is a novel approach, previous studies in gene therapy for other genetic disorders have shown promising results.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

Patients with severe Crigler-Najjar syndrome resulting from a molecular confirmation of mutations in the UGT1A1 gene and requiring phototherapy male or female at least 3 months (no more 10 years) at the date of signature of informed consent Patient able to give informed assent and/or consent in writing

Exclusion Criteria:

Patients who underwent liver transplantation Patients with chronic hepatitis B or C Patients infected with Human immunodeficiency virus (HIV) Patients with significant underlying liver disease Patients with significant encephalopathy Participation in any other investigational trial during this trial Patients unable or unwilling to comply with the protocol requirements

Where this trial is running

Moscow and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Crigler-Najjar Syndrome Type ICrigler-Najjar syndrome type Igene therapyGT-UGT1A1-AAV8-02Adeno Associated VirusCrigler-Najjar
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.