Long Term Follow Up to Evaluate DTX301 in Adults With Late-Onset OTC Deficiency

NCT ID: NCT03636438

Last Updated: 2026-02-19

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Total Enrollment

11 participants

Study Classification

OBSERVATIONAL

Study Start Date

2018-08-30

Study Completion Date

2029-12-31

Brief Summary

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Determine the long-term safety of DTX301 following a single intravenous (IV) dose in adults with late-onset ornithine transcarbamylase (OTC) deficiency.

Detailed Description

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Study 301OTC02 is a long-term follow-up study to evaluate the safety and efficacy of adeno-associated virus (AAV) serotype 8 (AAV8)-mediated gene transfer of human OTC in adults with late-onset OTC deficiency. Only subjects who complete Study 301OTC01 (NCT02991144) are eligible to participate in Study 301OTC02.

Conditions

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Ornithine Transcarbamylase (OTC) Deficiency

Study Design

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Observational Model Type

OTHER

Study Time Perspective

PROSPECTIVE

Interventions

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No Intervention

No Intervention

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

1. Completed the Week 52 visit in Study 301OTC01.
2. Willing and able to provide written informed consent.
3. Willing, able, and committed to comply with scheduled study site visits, study procedures, and requirements.

Exclusion Criteria

1. Planned or current participation in another interventional clinical study that may confound the efficacy or safety evaluation of DTX301 during the duration of this study.
2. Any clinically significant medical condition that, in the opinion of the investigator, would pose a risk to subject safety or would impede the study.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Ultragenyx Pharmaceutical Inc

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Medical Director

Role: STUDY_DIRECTOR

Ultragenyx Pharmaceuticals Inc

Locations

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The Children's Hospital Colorado

Aurora, Colorado, United States

Site Status

Boston Children's Hospital

Boston, Massachusetts, United States

Site Status

Icahn School of Medicine

New York, New York, United States

Site Status

University Hospital Cleveland Medical Center/Case Western Reserve University

Cleveland, Ohio, United States

Site Status

M.A.G.I.C. Clinic

Calgary, Alberta, Canada

Site Status

Hopital Femme Mere Enfant

Bron, Rhone, France

Site Status

Hospital Clinico Universitario de Santiago

Santiago de Compostela, Coruna, Spain

Site Status

Hospital Universitario de Cruces. Servicio de Pediatria

Barakaldo, Vizcaya, Spain

Site Status

Queen Elizabeth Hospital, Department of Endocrinology

Birmingham, , United Kingdom

Site Status

Countries

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United States Canada France Spain United Kingdom

Related Links

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https://www.ultraclinicaltrials.com/OTC/

Ultragenyx Ornithine Transcarbamylase (OTC) Deficiency Research Study Opportunity

Other Identifiers

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2018-000156-18

Identifier Type: EUDRACT_NUMBER

Identifier Source: secondary_id

2022-501146-30-00

Identifier Type: CTIS

Identifier Source: secondary_id

301OTC02

Identifier Type: -

Identifier Source: org_study_id

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