RECRUITING

AFFINITY DUCHENNE: RGX-202 Gene Therapy in Participants With Duchenne Muscular Dystrophy (DMD)

Conditions

Duchenne Muscular Dystrophy Gene therapy DMD Duchenne

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Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

RGX-202 is a gene therapy designed to deliver a transgene for a novel microdystrophin that includes functional elements of naturally-occurring dystrophin including the C-Terminal (CT) domain. This is a multicenter, open-label dose evaluation clinical study to assess the safety, tolerability, and clinical efficacy of a one-time intravenous (IV) dose of RGX-202 in participants with Duchenne. For additional information on how to participate (or be considered for the study), please follow this link: https://mytomorro.ws/affinity-ct-gov

Official Title

A Phase 1/2/3 Open-label Study to Evaluate the Safety, Tolerability, Efficacy, Pharmacodynamics, and Pharmacokinetics of Intravenous RGX-202 Gene Therapy in Males With Duchenne Muscular Dystrophy (DMD)

Quick Facts

Study Start:2023-01-04

Study Completion:2028-08

Study Type:Not specified

Phase:Not Applicable

Enrollment:Not specified

Status:RECRUITING

Study ID

NCT05693142

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Ages Eligible for Study:1 Year

Sexes Eligible for Study:MALE

Accepts Healthy Volunteers:No

Standard Ages:CHILD, ADULT, OLDER_ADULT

Inclusion Criteria	Exclusion Criteria
* The participant's legal guardian(s) is (are) willing and able to provide written, signed informed consent prior to any study-related procedures; and, where applicable, the minor participant has provided written or verbal assent according to local requirements. * Is a male at least 4 years of age and less than 12 years of age at consent or 1 to \<4 years of age at the time of dosing and ≥ 10 kg at the time of screening. * Must meet any of the following criteria: * DMD gene mutation in exons 18 and above, and a clinical picture consistent with typical DMD with the exception of a participant (Cohort 1b) with DMD gene mutation in exons 12-17. * Participant is able to walk 100 meters independently without assistive devices. Cohort 2c participant must be able to walk 10 meters independently without assistive devices. Cohort 1b participant must be able to walk with or without assistive devices. * Participant is able to complete the TTSTAND per protocol-specific criteria. * Participant has been on a stable dose of systemic glucocorticoids according to the standard of care for at least 12 weeks. Cohort 2c participants must be consistently on or off a stable dose of systemic glucocorticoids according to the standard of care for at least 12 weeks. * Clinical laboratory test results, including hepatic and renal function, are within the normal range during screening, or if abnormal, are not clinically significant, in the opinion of the investigator. * Documentation is provided at screening visit for participant's adherence to the local country's vaccination schedule. The parent(s) or legal guardian(s) must be willing to have their child receive a meningococcal vaccine, if not already vaccinated. * Participant and parent(s)/legal guardian(s) are willing and able to comply with scheduled visits, study intervention administration plan, and study procedures.	* Participant has any condition that would contraindicate treatment with immunosuppression. * Participant has received ataluren (a protein restoration therapy) or an exon-skipping therapy for the treatment of DMD within 6 months of study entry or is unable to refrain from taking ataluren or exon-skipping therapy for a duration of 5 years from the time of RGX-202 administration. * Participant has received any investigational or commercial gene therapy product over his lifetime. * Participant is currently taking any other investigational intervention (other than corticosteroids) or has taken any other investigational intervention (other than corticosteroids) within 3 months prior to the scheduled Day 1 intervention. If your corticosteroid is vamorolone, the participant will be asked to temporarily convert his daily dosing to prednisolone/prednisone during a short period of time around RGX-202 administration. He will be allowed to revert back to his baseline vamorolone regimen at the original per kilogram dose at which he entered the study and should remain on this for 24 months unless the investigator determines that this is not clinically indicated or possible. * Participant has impaired cardiac function defined as a left ventricular ejection fraction of \< 55% on screening cardiac assessments (echocardiogram or MRI). * Participant is not a good candidate for the study, in the opinion of the investigator.

Inclusion Criteria

Exclusion Criteria

* The participant's legal guardian(s) is (are) willing and able to provide written, signed informed consent prior to any study-related procedures; and, where applicable, the minor participant has provided written or verbal assent according to local requirements.
* Is a male at least 4 years of age and less than 12 years of age at consent or 1 to \<4 years of age at the time of dosing and ≥ 10 kg at the time of screening.
* Must meet any of the following criteria:
* DMD gene mutation in exons 18 and above, and a clinical picture consistent with typical DMD with the exception of a participant (Cohort 1b) with DMD gene mutation in exons 12-17.
* Participant is able to walk 100 meters independently without assistive devices. Cohort 2c participant must be able to walk 10 meters independently without assistive devices. Cohort 1b participant must be able to walk with or without assistive devices.
* Participant is able to complete the TTSTAND per protocol-specific criteria.
* Participant has been on a stable dose of systemic glucocorticoids according to the standard of care for at least 12 weeks. Cohort 2c participants must be consistently on or off a stable dose of systemic glucocorticoids according to the standard of care for at least 12 weeks.
* Clinical laboratory test results, including hepatic and renal function, are within the normal range during screening, or if abnormal, are not clinically significant, in the opinion of the investigator.
* Documentation is provided at screening visit for participant's adherence to the local country's vaccination schedule. The parent(s) or legal guardian(s) must be willing to have their child receive a meningococcal vaccine, if not already vaccinated.
* Participant and parent(s)/legal guardian(s) are willing and able to comply with scheduled visits, study intervention administration plan, and study procedures.

* Participant has any condition that would contraindicate treatment with immunosuppression.
* Participant has received ataluren (a protein restoration therapy) or an exon-skipping therapy for the treatment of DMD within 6 months of study entry or is unable to refrain from taking ataluren or exon-skipping therapy for a duration of 5 years from the time of RGX-202 administration.
* Participant has received any investigational or commercial gene therapy product over his lifetime.
* Participant is currently taking any other investigational intervention (other than corticosteroids) or has taken any other investigational intervention (other than corticosteroids) within 3 months prior to the scheduled Day 1 intervention. If your corticosteroid is vamorolone, the participant will be asked to temporarily convert his daily dosing to prednisolone/prednisone during a short period of time around RGX-202 administration. He will be allowed to revert back to his baseline vamorolone regimen at the original per kilogram dose at which he entered the study and should remain on this for 24 months unless the investigator determines that this is not clinically indicated or possible.
* Participant has impaired cardiac function defined as a left ventricular ejection fraction of \< 55% on screening cardiac assessments (echocardiogram or MRI).
* Participant is not a good candidate for the study, in the opinion of the investigator.

Contacts and Locations

Study Contact

Patient Advocacy

CONTACT

(833) 711-0349

Duchenne@regenxbio.com

Study Locations (Sites)

Arkansas Children's Hospital

Little Rock, Arkansas, 72202

United States

Stanford School of Medicine /Division of Neuromuscular Medicine

Palo Alto, California, 94304

United States

Children's Hospital Colorado

Aurora, Colorado, 80045

United States

Rare Disease Research

Atlanta, Georgia, 30329

United States

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

Chicago, Illinois, 60611

United States

University of Iowa

Iowa City, Iowa, 52242

United States

University of Massachusetts Chan Medical School

Worcester, Massachusetts, 01608

United States

Cincinnati Children's

Cincinnati, Ohio, 45229

United States

Oregon Health & Science University

Portland, Oregon, 97239

United States

The University of Texas Southwestern Medical Center

Dallas, Texas, 75390

United States

Children's Hospital of the King's Daughters

Norfolk, Virginia, 23510

United States

Children's Hospital of Richmond at Virginia Commonwealth University

Richmond, Virginia, 23298

United States

Collaborators and Investigators

Sponsor: REGENXBIO Inc.

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

Study Start Date2023-01-04

Study Completion Date2028-08

Study Record Updates

Study Start Date2023-01-04

Study Completion Date2028-08

Terms related to this study

Keywords Provided by Researchers

Gene therapy
DMD
Duchenne Muscular Dystrophy
Duchenne

Additional Relevant MeSH Terms

Duchenne Muscular Dystrophy