Recent Updates
Recently added Catalysts

4D-710

Phase 2

Cystic Fibrosis Lung | Monoclonal antibody | Respiratory |4D Molecular Therapeutics, Inc.|Last Updated: Jul 6, 2026

Target and mechanism

Molecular targetCFTR
Target classGene
ModalityMonoclonal antibody

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment30

FDA Designations

RARE_PEDIATRIC_DISEASE

Clinical trial landscape

4D-710 · 1 trial · 1 indication

Phase 2 1
NCT052482304D-710 in Adult Patients With Cystic FibrosisCystic Fibrosis Lung
RECRUITING30 Analytics
PHASE2RECRUITING
4D-710 in Adult Patients With Cystic Fibrosis
Cystic Fibrosis LungUnlock trial analytics

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.

Unlock Study Endpoints

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).
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to 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
Unlock Eligibility Criteria

Competitive Landscape -Cystic Fibrosis 17 trials (matched to "Cystic Fibrosis Lung")

Recent Changes (Last 90 Days)

LOWJul 6, 2026NCT05248230lastUpdatePostDate: changed
LOWJul 6, 2026NCT05248230lastUpdatePostDate: changed

Frequently asked questions about 4D-710

What is 4D-710 used for in cystic fibrosis lung disease?

4D-710 is an investigational gene therapy being developed for cystic fibrosis lung disease. It is designed to deliver a functional CFTR gene to lung cells to address the underlying genetic cause of the condition. The drug is currently in Phase 2 clinical development and has not been approved by the FDA.

What does 4D-710 target?

4D-710 targets the CFTR gene, which is defective in cystic fibrosis. As a gene therapy, it aims to deliver a working copy of the CFTR gene to airway cells to restore function of the CFTR protein. This mechanism is intended to address the root cause of cystic fibrosis lung disease.

Who makes 4D-710?

4D-710 is being developed by 4D Molecular Therapeutics, Inc., a biopharmaceutical company traded on Nasdaq under the ticker symbol FDMT. The company is conducting a Phase 2 clinical trial of 4D-710 in adult patients with cystic fibrosis lung disease.

What phase is 4D-710 in?

4D-710 is currently in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA. The drug has received FDA orphan drug designation for rare pediatric disease, reflecting its potential role in treating a serious condition affecting children.

What clinical trials is 4D-710 in?

4D-710 is being studied in a Phase 2 clinical trial with the identifier NCT05248230, titled '4D-710 in Adult Patients With Cystic Fibrosis.' The trial is recruiting 30 participants aged 18 years and older in the United States. It is a controlled study, though it is not randomized or double-blinded.

Is 4D-710 the same as any other drug?

4D-710 is a distinct investigational gene therapy developed by 4D Molecular Therapeutics. It is not known to be marketed under any other name. The drug is specifically designed for cystic fibrosis lung disease and is currently in Phase 2 trials.