What the trial was testing
The trial enrolled 4 patients with muscular dystrophy. The study was sponsored by Sarepta Therapeutics, Inc. and tracked outcomes across the full group of patients who matched the trial's eligibility profile.
It was an early-stage trial — researchers are still confirming safety and getting an early look at how well the treatment works. Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.
What the results showed
All four boys showed functional improvement in movement tests that lasted for one year after a single treatment.
JAMA neurology · 2020 · NCT03375164
These findings — that produced the missing dystrophin protein after gene therapy — were published in the JAMA neurology and represent the headline result of the study.
Researchers tracked outcomes across 4 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.
What this means for patients
For patients with muscular dystrophy, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.
What you can do now
This gene therapy (delandistrogene moxeparvovec, brand name Elevidys) received FDA approval in 2023 for children ages 4 and 5 with Duchenne muscular dystrophy. Talk to your child's neuromuscular specialist about whether this treatment is right for your family.
Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.
Open muscular dystrophy trials
Pelvic Floor Muscle Training for Women with Myotonic Dystrophy
Myotonic dystrophy type 1 (DM1) is a neuromuscular disease characterized by multisystem manifestations. DM1 can affect the urinary system through the impact of the pelvic floor muscles (PFM). Urinary incontinence can occur in this situation and is often offset with compensatory measures without restoring the PFM function (e.g. sanitary pads). PFM training have already been shown to be effective in reducing or even eliminating urinary incontinence in the general population. However, no study has been the subject of this modality in people with DM1. Having recently shown that it is possible to gain strength with DM1, a strengthening protocol targeting PFM could prove effective in treating urinary incontinence. The objectives of this study are i) to assess the feasibility and acceptability of PFM training and ii) to investigate the effects of PFM training in women with DM1 with adult phenotype. A quasi-experimental study will be conducted with 12 women having a confirmed diagnosis of DM1 with urinary incontinence. Participants will follow a 12-week PFM training program, comprising weekly sessions with an experienced physiotherapist as well as a home exercise program. Outcomes measures will be assessed at baseline and at post-treatment and will include: feasibility and acceptability variables, frequency of urinary incontinence, urogynecological symptoms and their impact on quality of life, morphometry and function of PFM, and the perceived improvement following the treatments. This study has the potential to improve the management of urinary incontinence and support the implementation of pelvic floor rehabilitation services in this population.
A Study of SGT-003 Gene Therapy in Ambulant Males With Duchenne Muscular Dystrophy (IMPACT DUCHENNE)
This is a Phase 3, double-blind, placebo-controlled study with the primary objective of evaluating the efficacy of a single IV infusion of SGT-003 in pediatric ambulant male participants with DMD. The secondary objectives include the evaluation of additional efficacy and safety outcomes. The study will be divided into 2 parts. Participants will be randomized 1:1 to either SGT-003 in Part 1 followed by placebo in Part 2 or to placebo in Part 1 followed by SGT-003 in Part 2. Participants will continue to be monitored in long term follow up (LTFU) for at least 5 years from their SGT-003 dosing date.