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Eladocagene Exuparvovec

Phase 2

AADC Deficiency | Gene therapy | Other |PTC Therapeutics, Inc.|Last Updated: Apr 24, 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
UNCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment13
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04903288A Study of SmartFlow Magnetic Resonance (MR) Compatible Ventricular Cannula for Administering Eladocagene Exuparvovec to Pediatric ParticipantsPHASE2 ACTIVE NOT_RECRUITING 13May 12, 2021Apr 30, 2028Apr 24, 20266 United States, Israel +1
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Study Endpoints
Primary Endpoints
Change From Baseline in HVA Metabolite Level at the End of the Trial Phase
Baseline (Day 1), Week 8

HVA is a main metabolite of dopamine and HVA CSF levels are recognized as a proxy for dopamine levels in the brain.

Number of Participants With Adverse Events (AEs) Associated With the Surgical Administration of Eladocagene Exuparvovec Using the SmartFlow® MR-Compatible Ventricular Cannula
Baseline (Day 1) up to Week 8

An AE is any untoward medical occurrence associated with the use of a drug in humans, whether or not it is considered related to the drug. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease in a study participant who was administered gene therapy in this study. Number of participants with AEs related to the SmartFlow MR-compatible ventricular cannula used to administer eladocagene exuparvovec to pediatric participants at the end of Trial Phase (8 weeks after administration) are reported. A summary of serious and all other non-serious adverse events regardless of causality is located in the Reported Adverse Events module."

Secondary Endpoints
Change From Baseline in Neurotransmitter Cerebrospinal Fluid (CSF) Metabolite HVA at Week 48
Baseline (Day 1), Week 48
Change From Baseline in Positron Emission Tomography (PET) Imaging of Putaminal-Specific L-6-[18F] Fluoro-3,4-Dihydroxyphenylalnine (18F-DOPA) PET Uptake at the End of the Trial Phase (Week 8) and the Extension Phase (Week 48)
Baseline (Day 1), Week 8, Week 48
Change From Baseline in Neurotransmitter CSF Metabolites 5-hydroxyindoleacetic Acid (5-HIAA), and 3-O-methyldopa (3-OMD) at Weeks 8 and 48
Baseline (Day 1), Weeks 8 and 48
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Eladocagene ExuparvovecEXPERIMENTALParticipants will receive eladocagene exuparvovec intraoperatively at 1.8×10\^11 vector genomes (vg) via SmartFlow® MR Compatible Ventricular Cannula in a single operative session. Participants will receive standard of care for their AADC deficiency during the study.
Interventions
NameTypeDescription
Eladocagene ExuparvovecGENETICFour 0.08 milliliters (mL) infusions at a dose of 0.45×10\^11 vg and a volume of 80 microliters (μl) per site to 4 sites (2 per putamen), for the total dose of 1.8×10\^11 vg and a total volume of 320 μl per participant.
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Eligibility Criteria
Age Range1 Year — 17 Years
SexALL
Healthy VolunteersNo
Study Sites6

Inclusion Criteria: * Pediatric participants must have genetically-confirmed AADC deficiency with typical clinical characteristics and decreased AADC enzyme activity in plasma. * Cranium sufficiently developed to allow placement of ClearPoint® system for stereotactic surgery. * Persistent neurologi...

Countries:United StatesIsraelTaiwan
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT04903288primaryCompletionDate: changed
LOWMay 24, 2026NCT04903288studyFirstPostDate: changed