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RGX-202

Phase 2

Duchenne Muscular Dystrophy | Gene therapy | Neurology |REGENXBIO Inc.|Last Updated: Dec 17, 2025

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
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment65
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05693142AFFINITY DUCHENNE: RGX-202 Gene Therapy in Participants With Duchenne Muscular Dystrophy (DMD)PHASE2 RECRUITING 65Jan 4, 2023Aug 1, 2028Dec 17, 202517 United States, Canada
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Study Endpoints
Primary Endpoints
Part 1 Safety measured by incidence of Adverse Events and Serious Adverse Events
52 weeks

Evaluate incidences of AEs and SAEs

Part 2 and 3 Pharmacodynamic
12 weeks

Proportion of participants whose RGX-202 microdystrophin protein expression determined in their muscle biopsy is ≥ 10%

Secondary Endpoints
Time to Stand (TTSTAND)
52 Weeks (Part 1); 52 and 104 Weeks (Part 2 &3)
Time to Walk/Run 10 meters (TTWR)
52 Weeks (Part 1) and 104 Weeks (Part 2 &3)
Time to Climb 4 Stairs (TTCLIMB)
52 Weeks (Part 1); 52 and 104 Weeks (Part 2 &3)
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part 1: Cohort 1 and 1b: RGX-202 Dose 1EXPERIMENTALA single IV infusion of RGX-202 at a dose of 1×10\^14 GC/kg body weight
Part 1: Cohort 2, 2c;, and Part 2; and Part 3: RGX-202 Dose 2EXPERIMENTALA single IV infusion of RGX-202 at a dose of 2x10\^14 GC/kg body weight
Interventions
NameTypeDescription
RGX-202GENETICRGX-202 is a recombinant AAV8 containing a transgene encoding a novel microdystrophin
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Eligibility Criteria
Age Range1 Year — N/A
SexMALE
Healthy VolunteersNo
Study Sites17

Part 1 - Key Inclusion Criteria: * The participant's legal guardian(s) is (are) willing and able to provide written, signed informed consent prior to any study-related procedures; and, where applicable, the minor participant has provided written or verbal assent according to local requirements. * I...

Countries:United StatesCanada
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT05693142primaryCompletionDate: changed
LOWMay 24, 2026NCT05693142studyFirstPostDate: changed