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SGT-003

Phase 3

Duchenne Muscular Dystrophy | Gene therapy | Neurology |Solid Biosciences Inc.|Last Updated: Aug 13, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials2
Total Enrollment140

FDA Designations

FAST_TRACKRARE_PEDIATRIC_DISEASEACCELERATED_APPROVAL

Clinical trial landscape

SGT-003 · 2 trials · 1 indication

Phase 3 1Phase 1 1
NCT07160634A Study of SGT-003 Gene Therapy in Ambulant Males With Duchenne Muscular Dystrophy (IMPACT DUCHENNE)Duchenne Muscular Dystrophy
RECRUITING80 Analytics
PHASE3RECRUITING
A Study of SGT-003 Gene Therapy in Ambulant Males With Duchenne Muscular Dystrophy (IMPACT DUCHENNE)
Duchenne Muscular DystrophyUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in Time to Rise (TTR) from Supine Velocity (rise/s) at Day 540
Baseline, Day 540
Incidence of treatment-emergent adverse events (AEs)
Day 360
Change from baseline in Microdystrophin Protein Levels
Day 90

Microdystrophin expression evaluation in muscle biopsies

Secondary Endpoints

Change From Baseline in Stride Velocity 95th Centile (SV95C) (m/s) at Day 540
Baseline, Day 540
Change From Baseline in 4-Stair Climb (4SC) Velocity (Tasks/s) at Day 540
Baseline, Day 540
Change From Baseline in North Star Ambulatory Assessment (NSAA) total score at Day 540
Baseline, Day 540
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
SGT-003 in Part 1, Placebo in Part 2EXPERIMENTALEnrolled participants will receive a single intravenous (IV) infusion of SGT-003 in Part 1 and may receive a single IV infusion of matching Placebo in Part 2 per protocol-defined eligibility criteria.
Placebo in Part 1, SGT-003 in Part 2EXPERIMENTALEnrolled participants will receive a single intravenous (IV) infusion of matching Placebo in Part 1 and a single IV infusion of SGT-003 in Part 2 per protocol-defined eligibility criteria.
Cohort 1: SGT-003EXPERIMENTALAll ambulatory participants from age 4 to \< 7 years will receive a single IV infusion of SGT-003 on Day 1.
Cohort 2: SGT-003EXPERIMENTALAll ambulatory participants from age 7 to \< 12 years will receive a single IV infusion of SGT-003 on Day 1.
Cohort 3: SGT-003EXPERIMENTALAll participants from age 0 to \< 4 years will receive a single IV infusion of SGT-003 on Day 1.
Cohort 4: SGT-003EXPERIMENTALAll ambulatory participants from age 12 to \< 18 years will receive a single IV infusion of SGT-003 on Day 1.
Cohort 5: SGT-003EXPERIMENTALAll non-ambulatory participants from age 10 to \< 18 years will receive a single IV infusion of SGT-003 on Day 1.

Interventions

NameTypeDescription
SGT-003DRUGAdeno-associated virus (AAV)-based gene therapy that delivers a codon-optimized and CpG island-minimized human 5-repeat microdystrophin (h-μD5)
PlaceboDRUGIV infusion
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Eligibility Criteria

Age Range7 Years to 11 Years
SexMALE
Healthy VolunteersNo
Study Sites7

Inclusion Criteria: * Participant is ambulatory. * Established clinical diagnosis of DMD and documented DMD gene mutation predictive of DMD phenotype. * Negative for antibodies against adeno-associated virus serotype 9 (AAV9). * On a stable daily oral regimen of at least 0.5 mg/kg/day prednisone or...

Countries:United StatesAustraliaCanadaItalyUnited Kingdom
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Recent Changes (Last 90 Days)

LOWAug 14, 2026NCT07160634lastUpdatePostDate: changed
LOWAug 14, 2026NCT07160634lastUpdatePostDate: changed
LOWAug 14, 2026NCT07160634lastUpdatePostDate: changed
LOWJul 17, 2026NCT07160634lastUpdatePostDate: changed
LOWJul 17, 2026NCT07160634lastUpdatePostDate: changed
LOWJul 17, 2026NCT07160634lastUpdatePostDate: changed
LOWJul 8, 2026NCT06138639lastUpdatePostDate: changed
LOWJul 8, 2026NCT06138639lastUpdatePostDate: changed
LOWJun 22, 2026NCT06138639lastUpdatePostDate: changed
LOWJun 22, 2026NCT06138639lastUpdatePostDate: changed

Frequently asked questions about SGT-003

What is SGT-003 used for in Duchenne Muscular Dystrophy?

SGT-003 is an investigational gene therapy being developed for the treatment of Duchenne Muscular Dystrophy (DMD), a genetic neuromuscular disorder. It is designed to address the underlying cause of the disease by delivering a functional gene to muscle cells. SGT-003 is currently in clinical development and has not yet been approved by regulatory authorities.

What does SGT-003 target?

SGT-003 is a gene therapy that targets Duchenne Muscular Dystrophy by delivering a modified version of the dystrophin gene to muscle cells. The therapy aims to restore the production of functional dystrophin protein, which is deficient in patients with DMD. This approach is intended to slow or halt disease progression by addressing the root cause of the condition.

Who makes SGT-003?

SGT-003 is being developed by Solid Biosciences Inc., a biopharmaceutical company focused on precision genetic medicines. The company's stock is traded under the ticker symbol SLDB. Solid Biosciences is leading the clinical development of SGT-003 for Duchenne Muscular Dystrophy and is responsible for its manufacturing and regulatory strategy.

What phase is SGT-003 in?

SGT-003 is currently in Phase 3 clinical development for Duchenne Muscular Dystrophy. It is an investigational gene therapy that has received Fast Track, Rare Pediatric Disease, and Accelerated Approval designations from the FDA. The drug is not yet approved and is being evaluated in ongoing clinical trials to assess its safety and efficacy.

What clinical trials is SGT-003 in?

SGT-003 is being studied in two active clinical trials. The INSPIRE DUCHENNE trial (NCT06138639) is a Phase 1 study enrolling 60 male participants in the US, Canada, Italy, and the UK. The IMPACT DUCHENNE trial (NCT07160634) is a Phase 3 study enrolling 80 ambulant males aged 7 years and older in the US, Australia, and Canada. Both trials are recruiting participants.

Is SGT-003 the same as INSPIRE DUCHENNE?

No, SGT-003 is the investigational drug, while INSPIRE DUCHENNE is the name of one of its clinical trials. The INSPIRE DUCHENNE trial (NCT06138639) is a Phase 1 study evaluating SGT-003 in patients with Duchenne Muscular Dystrophy. The drug is also being studied in a separate Phase 3 trial called IMPACT DUCHENNE (NCT07160634).