Long-term Extension of GTX-102 in Angelman Syndrome

NCT ID: NCT06415344

Last Updated: 2026-01-07

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

ENROLLING_BY_INVITATION

Clinical Phase

PHASE3

Total Enrollment

255 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-07-31

Study Completion Date

2029-02-28

Brief Summary

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The primary objective of the study is to evaluate the long-term safety profile of GTX-102 in participants with Angelman Syndrome (AS)

Detailed Description

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This study is a phase 3, long term extension (LTE) which is open to participants rolling over from a prior GTX-102 clinical study. The LTE study will evaluate the long-term safety and efficacy of GTX-102 in participants with AS.

Conditions

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Angelman Syndrome

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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GTX-102

Participants will receive GTX-102 via intrathecal lumbar puncture (IT LP) on a intrapatient flexible dosing schedule.

Group Type EXPERIMENTAL

GTX-102

Intervention Type DRUG

Antisense Oligonucleotide

Interventions

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GTX-102

Antisense Oligonucleotide

Intervention Type DRUG

Other Intervention Names

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apazunersen

Eligibility Criteria

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Inclusion Criteria

* Signed informed consent from parent(s) or legal guardian(s).
* Completed a final study visit in a prior clinical trial with GTX-102. If the subject has an ongoing adverse event, medical monitor approval is required to rollover. The Screening visit must occur within 6 months of the last visit in the prior GTX-102 trial.
* From the time of informed consent through the end of the study and for at least 6 months after the final dose of GTX-102, females of childbearing potential who are sexually active must use highly effective contraception or abstinence. Males are able to participate if they agree to remain abstinent (refrain from heterosexual intercourse) or use acceptable contraceptive methods during the study and for at least 3 months after the final dose of GTX-102.

Exclusion Criteria

* Discontinued from prior GTX-102 trial due to treatment-emergent adverse event assessed as related to GTX-102 and where the risk of study participation outweighs the benefits as deemed by the clinical judgment of the Investigator.
* History or evidence of any other medical, neurological, or psychological condition that would expose the subject to an undue risk of a significant AE or interfere with study assessments during the course of the trial as determined by the clinical judgment of the Investigator.
* Known hypersensitivity to GTX-102 or its excipients that, in the judgment of the Investigator, places the subject at increased risk for adverse effects.
* Pregnant or breastfeeding or planning to become pregnant (self or partner) at any time during the study
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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University of California, Los Angeles (UCLA)

Los Angeles, California, United States

Site Status

University of California, San Diego - Rady Children's Hospital

San Diego, California, United States

Site Status

Rare Disease Research, LLC

Atlanta, Georgia, United States

Site Status

Rush University Medical Center

Chicago, Illinois, United States

Site Status

Boston Children's Hospital

Boston, Massachusetts, United States

Site Status

Weill Cornell Medicine

New York, New York, United States

Site Status

Queensland Children's Hospital

South Brisbane, Queensland, Australia

Site Status

The Royal Children's Hospital

Melbourne, Victoria, Australia

Site Status

MAGIC Clinic Ltd

Calgary, Alberta, Canada

Site Status

British Columbia Children's Hospital

Vancouver, British Columbia, Canada

Site Status

Childrens Hospital London Health Sciences Centre

London, Ontario, Canada

Site Status

Childrens Hospital of Eastern Ontario

Ottawa, Ontario, Canada

Site Status

The Research Institute of the McGill University Health Centre

Montreal, Quebec, Canada

Site Status

AP-HM - Hopital de la Timone

Marseille, , France

Site Status

AP-HP Hopital Necker-Enfants Malades

Paris, , France

Site Status

Universitaetsklinikum Hamburg-Eppendorf

Hamburg, , Germany

Site Status

Universitaetsklinikum Leipzig

Leipzig, , Germany

Site Status

Sheba Medical Center

Ramat Gan, , Israel

Site Status

Hospital Universitario Puerta de Hierro

Majadahonda, , Spain

Site Status

Corporacio Sanitaria Parc Tauli - Hospital de Sabadell

Sabadell, , Spain

Site Status

University of Cambridge

Cambridge, , United Kingdom

Site Status

Great Ormond Street Hospital for Children

London, , United Kingdom

Site Status

Oxford University Hospitals NHS Foundation Trust

Oxford, , United Kingdom

Site Status

Countries

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United States Australia Canada France Germany Israel Spain United Kingdom

Related Links

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Other Identifiers

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2024-510917-14-00

Identifier Type: CTIS

Identifier Source: secondary_id

GTX-102-CL302

Identifier Type: -

Identifier Source: org_study_id

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