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4D-125 IVT

Phase 1

X-Linked Retinitis Pigmentosa | Monoclonal antibody | Ophthalmology |4D Molecular Therapeutics, Inc.|Last Updated: Mar 21, 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 Enrollment21
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT045171494D-125 in Patients With X-Linked Retinitis Pigmentosa (XLRP)PHASE1 ACTIVE NOT_RECRUITING 21Jun 9, 2020May 1, 2029Mar 21, 20258 United States
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Study Endpoints
Primary Endpoints
Incidence and severity of TEAEs and serious adverse events (SAEs), including clinically significant changes in safety parameters
24 months to 60 Months
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
4D-125 Dose ExplorationEXPERIMENTALDose 1 and Dose 2 4D-125 will be administered at the assigned dose level as a single dose, IVT injection on Day 1. The contralateral eye may also be dosed with 4D-125 as a single dose, IVT injection provided the subject is eligible and provides consent.
4D-125 Dose ExpansionEXPERIMENTAL4D-125 will be administered at the assigned dose level as a single dose, IVT injection on Day 1 in both adults and pediatric participants. For adult participants only, the contralateral eye may also be dosed with 4D-125 as a single dose, IVT injection provided the subject is eligible and provides consent.
ObservationalOTHERNatural History
Interventions
NameTypeDescription
4D-125 IVT InjectionBIOLOGICAL4D-125 drug product developed for gene therapy, which comprises an AAV capsid variant (4D-R100) carrying a codon-optimized human Retinitis Pigmentosa GTPase Regulator transgene.
ObservationalOTHERNatural History
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Eligibility Criteria
Age Range12 Years — N/A
SexMALE
Healthy VolunteersNo
Study Sites8

Natural History Key Inclusion Criteria: * Male, ≥ 6 years of age at the time of informed consent * Hemizygous non-syndromic RPGR mutation confirmed by genetic testing Interventional Key Inclusion Criteria: * Male, ≥12 years of age * Hemizygous non-syndromic RPGR mutation confirmed by genetic test...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT04517149primaryCompletionDate: changed
LOWMay 24, 2026NCT04517149studyFirstPostDate: changed