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4D-710

Phase 2

Cystic Fibrosis Lung | Monoclonal antibody | Respiratory |4D Molecular Therapeutics, Inc.|Last Updated: Mar 11, 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
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment30
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT052482304D-710 in Adult Patients With Cystic FibrosisPHASE2 RECRUITING 30Mar 29, 2022Jun 1, 2031Mar 11, 202620 United States
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Study Endpoints
Primary Endpoints
Incidence and severity of adverse events
60 Months

Safety and tolerability of 4D-710 following a single dose via inhalation, as assessed by incidence and severity of treatment emergent adverse events, serious adverse events, and dose limiting toxicities, including clinically significant changes from baseline to scheduled time points in safety parameters.

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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
4D-710 Phase 1: Dose ExplorationEXPERIMENTALParticipants who are ineligible for or intolerant of modulator therapy will receive one of various dose levels of 4D-710 to identify recommended phase 2 dose(s) for further evaluation.
4D-710 Phase 2: Dose ExpansionEXPERIMENTALParticipants will receive a single inhalational administration of 4D-710 at the dose level(s) selected for dose expansion.
4D-710 Dose Exploration (Sub-Study)EXPERIMENTALParticipants who are on currently available CFTR modulator therapy will receive a dose of 4D-710 at various dose levels.
Interventions
NameTypeDescription
4D-710BIOLOGICAL4D-710 is an adeno-associated virus (AAV) gene therapy comprised of an AAV capsid variant (4D-A101) carrying a transgene cassette encoding human cystic fibrosis transmembrane conductance regulator with a deletion in the regulatory domain (CFTRΔR).
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites20

Key Inclusion Criteria (Primary Study): 1. 18 years and older 2. Confirmed diagnosis of cystic fibrosis (CF) and CF lung disease including: 1. Sweat chloride ≥ 60 mmol/L 2. Mutation Status * Bi-allelic mutations in the CFTR gene, or * Single mutation in the CFTR gene and clinica...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT05248230primaryCompletionDate: changed
LOWMay 24, 2026NCT05248230studyFirstPostDate: changed