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SGT-003

Phase 3

Duchenne Muscular Dystrophy | Gene therapy | Neurology |Solid Biosciences Inc.|Last Updated: Jun 2, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment140
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07160634A Study of SGT-003 Gene Therapy in Ambulant Males With Duchenne Muscular Dystrophy (IMPACT DUCHENNE)PHASE3 RECRUITING 80Oct 22, 2025Jan 1, 2034Jun 2, 20265 United States, Australia +1
NCT06138639A Study of SGT-003 Gene Therapy in Duchenne Muscular Dystrophy (INSPIRE DUCHENNE)PHASE1 RECRUITING 60May 6, 2024May 6, 2031May 8, 202615 United States, Canada +2
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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 10-meter Walk/Run (10MWR) Velocity (m/s) at Day 540
Baseline, Day 540
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
SGT-003 followed by PlaceboEXPERIMENTALEnrolled participants will receive a single intravenous (IV) infusion of SGT-003 in Part 1 and a single IV infusion of matching Placebo in Part 2.
Placebo followed by SGT-003EXPERIMENTALEnrolled 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.
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 — 11 Years
SexMALE
Healthy VolunteersNo
Study Sites5

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. * On a stable daily oral regimen of at least 0.5 mg/kg/day prednisone or 0.75 milligrams p...

Countries:United StatesAustraliaCanadaItalyUnited Kingdom
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Recent Changes (Last 90 Days)
LOWJun 2, 2026NCT07160634lastUpdatePostDate: changed
LOWJun 2, 2026NCT07160634lastUpdatePostDate: changed
LOWJun 2, 2026NCT07160634lastUpdatePostDate: changed
LOWMay 26, 2026NCT06138639primaryCompletionDate: changed
LOWMay 26, 2026NCT07160634primaryCompletionDate: changed
LOWMay 24, 2026NCT06138639studyFirstPostDate: changed
LOWMay 24, 2026NCT07160634studyFirstPostDate: changed