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RGX-202

Phase 2

Duchenne Muscular Dystrophy | Gene therapy | Neurology |REGENXBIO Inc.|Last Updated: Jul 21, 2026

Target and mechanism

Molecular targetdystrophin
Target classProtein
ModalityGene therapy

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment65

FDA Designations

ACCELERATED_APPROVALFAST_TRACKORPHAN_DRUGRARE_PEDIATRIC_DISEASE

Clinical trial landscape

RGX-202 · 1 trial · 1 indication

Phase 2 1
NCT05693142AFFINITY DUCHENNE: RGX-202 Gene Therapy in Participants With Duchenne Muscular Dystrophy (DMD)Duchenne Muscular Dystrophy
ACTIVE NOT_RECRUITING65 Analytics
PHASE2ACTIVE NOT_RECRUITING
AFFINITY DUCHENNE: RGX-202 Gene Therapy in Participants With Duchenne Muscular Dystrophy (DMD)
Duchenne Muscular DystrophyUnlock trial analytics

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% relative to dystrophin level in non-DMD participants

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 (enrollment complete): 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 (enrollment complete for all): RGX-202 Dose 2EXPERIMENTALA single IV infusion of RGX-202 at a dose of 2x10\^14 GC/kg body weight (or a fixed dose of 1.00×10\^16 GC \[150 mL\] for participants weighing \> 50 kg)

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 to N/A
SexMALE
Healthy VolunteersNo
Study Sites23

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)

MEDIUMJul 21, 2026NCT05693142Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJun 30, 2026NCT05693142primaryCompletionDate: changed
MEDIUMJun 30, 2026NCT05693142primaryCompletionDate: changed
MEDIUMJun 30, 2026NCT05693142primaryCompletionDate: changed
LOWMay 26, 2026NCT05693142primaryCompletionDate: changed
LOWMay 24, 2026NCT05693142studyFirstPostDate: changed

Frequently asked questions about RGX-202

What is RGX-202 used for in Duchenne Muscular Dystrophy?

RGX-202 is an investigational gene therapy being developed for the treatment of Duchenne Muscular Dystrophy (DMD), a genetic disorder characterized by progressive muscle degeneration and weakness. It is designed to deliver a functional version of the dystrophin gene to muscle cells. RGX-202 is currently in Phase 2 clinical development.

What does RGX-202 target?

RGX-202 targets the dystrophin protein, which is deficient or defective in patients with Duchenne Muscular Dystrophy. By delivering a functional dystrophin gene, the therapy aims to restore dystrophin production in muscle cells, potentially slowing or halting disease progression. This gene therapy approach is designed to address the underlying genetic cause of DMD.

Who makes RGX-202?

RGX-202 is being developed by REGENXBIO Inc., a biotechnology company focused on gene therapies. REGENXBIO is publicly traded on the Nasdaq under the ticker symbol RGNX. The company is conducting clinical trials to evaluate the safety and efficacy of RGX-202 in patients with Duchenne Muscular Dystrophy.

What phase is RGX-202 in?

RGX-202 is currently in Phase 2 clinical development. It is an investigational gene therapy and has not yet been approved by the FDA. The drug has received several FDA designations, including Accelerated Approval, Fast Track, Orphan Drug, and Rare Pediatric Disease designations, reflecting its potential to address a serious unmet medical need.

What clinical trials is RGX-202 in?

RGX-202 is being evaluated in the AFFINITY DUCHENNE trial (NCT05693142), a Phase 2 study in participants with Duchenne Muscular Dystrophy. This active, non-recruiting trial has an enrollment of 65 participants and is being conducted in the United States and Canada. The study includes male participants aged 1 year and older.

Is RGX-202 the same as AFFINITY DUCHENNE?

No, RGX-202 is the investigational gene therapy, while AFFINITY DUCHENNE is the name of the clinical trial evaluating it. The trial, identified as NCT05693142, is a Phase 2 study assessing the safety and efficacy of RGX-202 in participants with Duchenne Muscular Dystrophy. The trial is active but not currently recruiting participants.