A Study to Investigate the Safety and Biodistribution of a Single Intrathecal (IT) Injection of INS1201 in Ambulatory Males With Duchenne Muscular Dystrophy (DMD)
Purpose
The primary objective of this study is to evaluate the safety and tolerability of a single dose of INS1201 via IT administration in ambulatory male participants with DMD.
Condition
- Duchenne Muscular Dystrophy
Eligibility
- Eligible Ages
- Between 2 Years and 4 Years
- Eligible Sex
- Male
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- Participant must be male at birth, 3 to <5 years of age, inclusive (Part 1) and 2 to <3 years of age (Part 2), at the time of legally authorized representative (LAR) signing and dating the informed consent form. - Ambulatory -as defined as the ability to walk at least 10 meters unassisted (ie, without personal assistance or use of any assistive devices) Note: children who have not yet developed the ability to walk by the time of screening (for whatever reason) will not be eligible for the study. - Has a definitive diagnosis of DMD prior to Screening or as part of Screening based on genetic testing. Note that participants who rescreen do not have to repeat genetic testing for the diagnosis of DMD if one is already on file. Genetic reports must describe a frameshift deletion, frameshift duplication, premature stop ("nonsense"), canonical splice site mutation, or other pathogenic variant in the DMD gene fully contained between exons 18 to 58 (inclusive) that is expected to lead to absence of a functional dystrophin protein (mutations in exons 1-17 or 59-71 are therefore not permitted). - Able to cooperate with motor assessment testing. - Has received vaccinations recommended for the participant's age and DMD disease according to Centers for Disease Control and Prevention (CDC) Child and Adolescent Immunization Schedule by Age, World Health Organization, or local recommendation incorporating the Advisory Committee on Immunization Practices (ACIP) Vaccine Recommendations and Guidelines for Patients with Altered Immunocompetence. Exception is made for seasonal influenza and coronavirus disease 2019 (COVID-19) vaccines, for which shared decision-making with the participant's physician is encouraged.
Exclusion Criteria
- Prior treatment with gene or cell-based therapy at any time. - Oligonucleotide-based exon skipping or small molecule stop codon readthrough-promoting therapies for at least 6 months prior to enrolment. - Has left ventricular ejection fraction < 50% on the screening echocardiogram (ECHO) or clinical signs and/or symptoms of cardiomyopathy. - Has cardiac arrhythmia or significant electrocardiogram (ECG) interval abnormalities. - Major surgery within 3 months prior to Day 1 or planned surgery or procedures that would interfere with the conduct of the study at any time during this study. - The presence of any other clinically significant illness, including cardiac, pulmonary, hepatic, renal, hematologic, immunologic/allergic, behavioural disease, infection, unhealed injury, malignancy, concomitant illness, extenuating circumstance, or requirement for chronic drug treatment that, in the opinion of the Investigator: 1. Creates unnecessary risks for undergoing gene transfer; 2. Might compromise the participant's ability to comply with the protocol-required testing or procedures; or 3. Might compromise the participant's well-being, safety, or clinical interpretability. - Has serological evidence of current, chronic, or active human immunodeficiency virus, hepatitis C, or hepatitis B infection. - Has signs of clinically significant symptomatic infection (eg, upper respiratory tract infection, pneumonia, pyelonephritis, meningitis) within 4 weeks prior to Day 1. - Has contraindications for IT administration of the product or for lumbar puncture, such as anatomical abnormalities, bleeding disorders or other medical conditions (eg, spina bifida, meningitis, or significant clotting abnormalities). - Demonstrates cognitive or developmental delay or impairment that could confound assessment of motor development in the opinion of the Investigator. - Total serum anti-AAV9 antibody titers of > 1:50 as determined by ELISA within 14 days of Day 1. Note: Other inclusion/exclusion criteria may apply.
Study Design
- Phase
- Phase 1
- Study Type
- Interventional
- Allocation
- Non-Randomized
- Intervention Model
- Sequential Assignment
- Primary Purpose
- Treatment
- Masking
- None (Open Label)
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
|
Experimental Part 1: Cohort 1 |
Participants aged 3 to <5 years will receive a single dose level 1 of INS1201 by IT injection on Day 1. |
|
|
Experimental Part 1: Cohort 2 |
Participants aged 3 to <5 years will receive a single dose level 2 of INS1201 by IT injection on Day 1. |
|
|
Experimental Part 2: Cohort 3 |
Participants aged 2 to <3 years will receive a single dose level 1 of INS1201 by IT injection on Day 1. |
|
|
Experimental Part 2: Cohort 4 |
Participants aged 2 to <3 years will receive a single dose level 2 of INS1201 by IT injection on Day 1. |
|
Recruiting Locations
USA010
Davis 5341704, California 5332921 95616
Davis 5341704, California 5332921 95616
USA005
San Diego 5391811, California 5332921 93123
San Diego 5391811, California 5332921 93123
Rare Disease Research (USA004)
Atlanta 4180439, Georgia 4197000 30329
Atlanta 4180439, Georgia 4197000 30329
USA006
Columbus 4509177, Ohio 5165418 43205
Columbus 4509177, Ohio 5165418 43205
More Details
- NCT ID
- NCT06817382
- Status
- Recruiting
- Sponsor
- Insmed Gene Therapy LLC