DMD, Duchenne, Duchenne Muscular Dystrophy, Muscular Dystrophies, Neuromuscular Diseases
Conditions
Keywords
muscle regeneration, satellite cell, asymmetric division, dystrophin
Brief summary
Phase 2a trial of SAT-3247 in ambulatory DMD patients aged ≥ 7 and \< 10 years. The trial has two parts. In Part 1, the trial will study two doses of SAT-3247 in a randomized, double-blind, placebo-controlled weekday regimen for 12 weeks to determine the optimal dose, safety, tolerability, and preliminary efficacy. In Part 2, the trial will study two doses of SAT-3247 for an additional 9 months.
Detailed description
This is a global phase 2a trial of SAT-3247 in ambulatory DMD patients aged ≥ 7 and \< 10 years. The trial has two parts. In Part 1, the trial will study two doses of SAT-3247 in a randomized, double-blind, placebo-controlled weekday regimen for 12 weeks to determine the optimal dose, safety, tolerability, and preliminary efficacy. In Part 2, the trial will study two doses of SAT-3247 for an additional 9 months. One dose of SAT-3247 and placebo will be studied in the US and Canada; two doses of SAT-3247 and placebo will be studied in UK, EU, Serbia, and Australia. Enrollment of up to 51 ambulatory DMD participants aged ≥ 7 and \< 10 years of age is planned globally. Randomization will be stratified by baseline corticosteroid regimen and prior DMD concomitant medications. In Part 1, each participant will receive once daily doses of SAT-3247 or matched placebo for 12 weeks. In Part 2, each participant will receive a once daily dose of SAT-3247 for an additional 9 months. Participants will be screened within 28 days before initiating dosing of investigational product at Baseline. Following the Screening period, participants will complete a Baseline visit (Visit 2), a follow-up phone call at Week 1, and visits at Week 4 (Visit 3), Week 8 (Visit 4), Week 12 (Visit 5), Week 24 (Visit 6), Week 36 (Visit 7) and Week 48 (Visit 8).
Interventions
DRUGSAT-3247
SAT-3247 is a selective AAK1 inhibitor for oral tablet administration which promotes functional rescue of asymmetric satellite cell division, resulting in the robust production of muscle progenitor cells, subsequent improvement in muscle regeneration, and enhanced muscle function.
DRUGPlacebo
matching placebo oral tablets
Sponsors
Satellos Bioscience, Inc.
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Masking description
double-blind
Intervention model description
randomized, placebo-controlled, 2-dose comparison
Eligibility
Sex/Gender
MALE
Age
7 Years to 9 Years
Healthy volunteers
No
Inclusion criteria
Key Inclusion Criteria: * Has a definitive diagnosis of DMD based on documented clinical findings and prior genetic testing with a confirmed mutation in the DMD gene. * Male DMD patients who are ambulatory and aged ≥ 7 to \< 10 years at the time of screening. * Stable dose of systemic glucocorticoids (i.e., prednisolone, deflazacort, or vamorolone) according to the standard of care for ≥ 3 months prior to the Screening Visit and for the duration of the trial. Patients who are not receiving glucocorticosteroids are also eligible if stopped ≥ 3 months prior to the Screening Visit. * Stable doses of prescription medicines including ACE inhibitors, β-blockers, and diuretics (excluding glucocorticosteroids) and over-the-counter medicines and/or herbal supplements for supportive care ≥ 1 month prior to the Screening Visit and for the duration of the trial. * Participants that have previously received delandistrogene moxeparvovec (brand name Elevidys) either in a prior clinical trial or in the commercial setting \> 18 months prior to screening whose muscle function tests have stabilized or demonstrated decline ≥ 3 months prior to Screening, as determined by investigator and documented in chart notes, will be eligible. * Participants that have previously received an exon skipper \> 6 months prior to Screening whose muscle function tests have stabilized or demonstrated decline ≥ 3 months prior to Screening, as determined by investigator and documented in chart notes, will be eligible. * Participants receiving a stable dose of givinostat (brand name Duvyzat) for at least 18 months or longer prior to the Screening Visit will be eligible. Participants unable to tolerate givinostat who discontinued treatment before 18 months are eligible to enroll if date of last dose is ≥ 30 days from the Screening date. Givinostat should not be discontinued, if tolerated, to meet study entry criteria. * Participants that have received prior treatment with an investigational gene therapy product (other than delandistrogene moxeparvovec) ≥ 24 months prior to the Screening Visit. * If participating in a physical therapy/strength training regimen, must be stable for ≥ 2 months prior to the Screening Visit and for the duration of the trial. Key
Exclusion criteria
* Ambulatory patients expected to experience loss of ambulation within ≤ 12 months. * Participants for whom MRI or open muscle biopsy are contraindicated. * Evidence of significant hepatic dysfunction, defined as GLDH \> 2X upper limit of normal (ULN) at the Screening Visit. * Impaired cardiac function defined as a left ventricular ejection fraction of \< 50% on screening cardiac assessments (echocardiogram or MRI) or evidence of symptomatic cardiomyopathy. * A forced vital capacity \< 60% predicted at the Screening Visit. * Ongoing participation in any other therapeutic clinical trial or follow-up study for a therapeutic intervention * Consumption of grapefruit juice or grapefruit containing products * Severe behavioural or cognitive problems that preclude participation in the study, in the opinion of the investigator. Additional entry criteria will be reviewed with the clinical site investigator.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Safety of SAT-3247 | 12 weeks in Part 1 and up to 12 months in part 2 | Occurrence of treatment emergent adverse events and relationship to investigational product |
| Tolerability of SAT-3247 | 12 weeks in Part 1 and up to 12 months in Part 2 | occurrence of clinically significant changes in physical exam, clinical laboratory measures, vital signs, and ECG |
| SAT-3247 effects on muscle strength | 12 weeks in Part 1 and up to 12 months in Part 2 | change from baseline in muscle force as determined by dynamometry |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| SAT-3247 effects on muscle quality | 12 weeks in Part 1 and up to 12 months in Part 2 | change from baseline in intramuscular fat fraction in quantitative magnetic resonance in vastus lateralis (thigh muscle) |
| SAT-3247 effects on muscle function | 12 weeks in Part 1 and up to 12 months in Part 2 | changes from baseline in north star ambulatory assessment |
| SAT-3247 effects on muscle regeneration | 12 weeks | changes from baseline in the regeneration index as measured from an open biopsy of biceps brachii |
Countries
Australia, Belgium, Canada, Poland, Serbia, Spain, United Kingdom, United States
Contacts
CONTACTSatellos Medical Information
STUDY_DIRECTORSatellos Chief Medical Officer
Satellos Bioscience, Inc.
Outcome results
None listed