A PHASE 3, RANDOMIZED, DOUBLE-BLIND,PLACEBO-CONTROLLED STUDY OF PF-06939926 IN DMD
- Conditions
- DUCHENNE MUSCULAR DYSTROPHY (DMD)MedDRA version: 20.0Level: PTClassification code: 10013801Term: Duchenne muscular dystrophy Class: 100000004850Therapeutic area: Diseases [C] - Musculoskeletal Diseases [C05]
- Registration Number
- CTIS2023-508510-42-00
- Lead Sponsor
- Pfizer Inc.
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Recruiting
- Sex
- Male
- Target Recruitment
- 117
Male participants who are =4 and <8 years of age at Screening (Visit 1)., Confirmed diagnosis of DMD by prior genetic testing demonstrating the presence of a mutation in the dystrophin gene consistent with DMD at Screening (Visit 1). If the Investigator determines that the results are inconclusive, a repeat genetic testing will be allowed through the central laboratory at Screening (Visit 1)., Receipt of a stable daily dose of glucocorticoids (=0.5 mg/kg/day prednisone, prednisolone, or =0.75 mg/kg/day deflazacort) for at least 3 months prior to Screening (Visit 1) and during the period between Screening (Visit 1) and Day 1 (Visit 3). In order to comply with protocol procedures, there should also be a reasonable expectation that this daily dose of glucocorticoids will remain stable for the first 2 years of the study. A stable dose is defined as one in which any change is =0.2 mg/kg., A NSAA total score >16 and <30 at Screening (Visit 1)., Ambulatory, defined as being able to walk 10 meters unassisted, at Screening (Visit 1)., Participants/legally acceptable representatives who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures including, potentially, open muscle biopsies under general anesthesia and cardiac MRI under general anesthesia., Participants/legally acceptable representatives who are capable of giving assent/signed informed consent as described in Appendix 1, which includes compliance with the requirements and restrictions listed in the assent/informed consent document (ICD) and in this protocol., Participants/legally acceptable representatives who are willing to protect the integrity of the study data by not actively seeking sensitive clinical data (eg, CK, ALT, AST, NAb to AAV9) through independent laboratory tests and by not sharing trial experiences with other participants or publicly (eg, through social media).
Prior treatment with gene therapy, defined as any therapy introducing exogenous DNA or intended to permanently alter the endogenous DNA. Gene therapy (other than IP) will be prohibited for the duration of the study., Acute infection at Screening (Visit 1) or Baseline (Visit 2) that, in the judgement of the Investigator is not expected to be fully resolved at least 2 weeks before Day 1 (Visit 3). At Day 1 (Visit 3), participants must have been infection-free for at least 2 weeks prior to IP administration. Delay of IP administration for up to 14 days is permitted to enable infections to become fully resolved., Investigator site staff members directly involved in the conduct of the study and their family members, site staff members otherwise supervised by the Investigator, or Pfizer employees, including their family members, directly involved in the conduct of the study., Known hypersensitivity to any of the components of the IP or solution for infusion, such as hypersensitivity to albumin or a diagnosis of HFI. Symptoms suggestive of HFI include nausea, vomiting, bloating, stomach cramps, or diarrhea following the ingestion of sweet foods or drinks, or a pattern of avoiding sweet foods or drinks., Contraindication to the use of eculizumab, as per the local prescribing information., LVEF <50% on echocardiogram performed at the Screening Visit (Visit 1), as evaluated by the central reader., Participants with the following genetic abnormalities in the dystrophin gene as confirmed by the investigator based on the review of DMD genetic testing: a. Any mutation (exon deletion, exon duplication, insertion, or point mutation) affecting any exon between exon 9 and exon 13, inclusive; OR b. A deletion that affects both exon 29 and exon 30; OR c. A deletion that affects any exons between 56-71, inclusive., Cardiac pathologies, as evaluated by a pediatric cardiologist at the Screening Visit (Visit 1): a. Diagnosis of myocarditis (eg, viral): either based on prior medical history or based on findings in cardiac imaging tests; b. Any other cardiac history, and/or condition and/or abnormalities in cardiac imaging, that determine that the participant should not be included in the study, as per the cardiologist., Not a candidate for mechanical cardiac or respiratory support, or any other invasive intervention, if indicated for management of an acute event as determined by the cardiologist in consultation with the investigator at the Screening Visit (Visit 1)., Exposure within 6 months prior to Screening (Visit 1) to any treatment designed to increase dystrophin expression (including, but not limited to exon-skipping and nonsense read-through). These treatments will also be prohibited during the period between Screening (Visit 1) and Day 1 (Visit 3) and for the first 52 weeks of the study. Please note that for participants who are eligible for these treatments: Participants may be enrolled who have previously experienced lack of efficacy, or intolerance, as long as they received their last dose more than 6 months before screening (Visit 1), or who have refused these treatments. Participants receiving these treatments from which there is believed to be benefit should not discontinue them in order to meet this exclusion criterion and enroll in the study., Previous administration with an investigational drug or investigational vaccine within 30 days (or as determined by the local requirement) or 5 half-lives (whichever is longer) at Screening (Visit 1). Thes
Study & Design
- Study Type
- Interventional clinical trial of medicinal product
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method
- Secondary Outcome Measures
Name Time Method