Clinical trial Recruiting at 23 sites Phase 3 Interventional Ages 18 and up

4D-150 gene therapy injected into the eye for adults with diabetic macular edema

Official title: A Phase 3, Randomized, Double-Masked, Active-Controlled Trial to Evaluate the Efficacy, Safety, and Durability of a Single Intravitreal Injection of 4D-150 Versus Aflibercept in Adults With Diabetic Macular Edema (4SIGHT)

Run by 4D Molecular Therapeutics · NCT07867080 · Data updated 2026-11-12

This study tests whether a one-time intravitreal injection of 4D-150 can help adults with diabetic macular edema compare to aflibercept.

More Diabetic Macular Edema (DME) trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment514 (estimated)
Sponsor4D Molecular Therapeutics
Industry-sponsored
Locations94 sites (Scottsdale, Arizona and 93 other locations)
StatusRecruiting
StartedSeptember 18, 2026
Main results expectedJanuary 2029
Study endsJanuary 2030
Registry record updatedNovember 10, 2026
Trial IDNCT07867080 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 18 and older with a documented diabetes diagnosis and macular thickening involving the fovea in the study eye.

Probably not a fit

Patients without the specific retinal response or with safety concerns may not experience benefit from 4D-150.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This Phase 3 trial is randomized, double-masked, and active-controlled, comparing a single intravitreal injection of 4D-150 to aflibercept in adults with DME. It aims to assess safety, efficacy, and how long the effect lasts. Participants will receive injections in one study eye and will be followed over time to monitor vision and retinal outcomes. The study is conducted at selected sites in Arizona and California under a sponsor-led program.

Why it matters

Potential benefit: If successful, 4D-150 could provide a new treatment option that may reduce or replace frequent anti-VEGF injections for DME.

How similar studies have gone: Other intravitreal gene therapy approaches have shown potential, but this phase 3 trial tests a novel, single-dose strategy in DME.

Who can join: the full rules

Show full inclusion / exclusion criteria
5.2 Inclusion Criteria

Individuals eligible to participate in the trial must meet the following inclusion criteria:

General Inclusion Criteria

1. Signed informed consent before any protocol-specified assessment is performed
2. Ability and willingness to comply with the protocol-specified procedures (including IVT injection) and visits, in the Investigator's judgment
3. ≥18 years of age at time of signing informed consent
4. Documented diagnosis of diabetes mellitus (Type 1 or Type 2)
5. WOCBP must agree to use highly effective contraception from the time of informed consent, through duration of trial participation
6. Agree to use a barrier method (e.g., condom) during intercourse for 3 months after Day 1 to prevent fluid transmission; sexually active males should not father a child or donate sperm during this period Ocular Inclusion Criteria
7. Macular thickening secondary to DME involving the center of the fovea (confirmed by the Reading Center) in the study eye
8. Study eye amenable to IVT injection identified
9. Presence of intraretinal fluid and/or subretinal fluid secondary to DME
10. Decreased visual acuity attributable primarily to DME, as determined by the Investigator
11. Demonstrated clinical response to aflibercept and functional stability in the study eye

Exclusion Criteria: Individuals who meet any of the following exclusion criteria will not be eligible to participate:

Ocular Condition

1. Macular conditions other than DME
2. History or presence of moderate Proliferative Diabetic Retinopathy or worse
3. History of retinal detachment in the study eye
4. History or presence of active inflammation or infection in either eye
5. History or presence of low Intraocular Pressure
6. Uncontrolled glaucoma or intraocular hypertension

   Ocular Treatments/Interventions:
7. Any prior concomitant treatment for DME
8. History of prior significant ocular surgery or treatment
9. Any prior investigational drug, agent, device, or gene therapy

Where it's running

  • Research Network Arizona
    Scottsdale, Arizona, United States
    Recruiting
  • The Retina Partners
    Encino, California, United States
    Recruiting
  • Retina Specialists of Colorado - Aurora
    Aurora, Colorado, United States
    Recruiting
  • Southwest Retina Consultants
    Durango, Colorado, United States
    Recruiting
  • Coastal Eye- Greenwich
    Greenwich, Connecticut, United States
    Recruiting
  • Retinal Specialty Institute
    Pensacola, Florida, United States
    Recruiting
Show 44 more locations
  • Retina Vitreous Associates of Florida
    Tampa, Florida, United States
    Recruiting
  • Retina Associates, Ltd.
    Elmhurst, Illinois, United States
    Recruiting
  • University Retina and Macula Associates, PC - Lemont
    Lemont, Illinois, United States
    Recruiting
  • Deep Blue Retina Clinical Research, PLLC
    Southaven, Mississippi, United States
    Recruiting
  • Sierra Eye Associates
    Reno, Nevada, United States
    Recruiting
  • Envision Ocular, LLC
    Bloomfield, New Jersey, United States
    Recruiting
  • Retina Vitreous Surgeons of CNY, PC
    New York, New York, United States
    Recruiting
  • Asheville Eye Associates - Retina Division
    Asheville, North Carolina, United States
    Recruiting
  • Retina Vitreous Center
    Edmund, Oklahoma, United States
    Recruiting
  • Black Hills Regional Eye Institute
    Rapid City, South Dakota, United States
    Recruiting
  • Austin Clinical Research
    Austin, Texas, United States
    Recruiting
  • Texas Retina Associate
    Dallas, Texas, United States
    Recruiting
  • Texas Retina Center
    Houston, Texas, United States
    Recruiting
  • Tyler Retina Consultants
    Tyler, Texas, United States
    Recruiting
  • The Retina Group of Washington
    Fairfax, Virginia, United States
    Recruiting
  • Piedmont Eye Center
    Lynchburg, Virginia, United States
    Recruiting
  • Eye Clinic of Wisconsin
    Wausau, Wisconsin, United States
    Recruiting
  • Retina Consultants of Orange County
    Fullerton, California, United States
    Not yet recruiting
  • Retina Associates of Southern California
    Huntington Beach, California, United States
    Not yet recruiting
  • Retinal Consultants Medical Group Inc.
    Sacramento, California, United States
    Not yet recruiting
  • Retina Consultants San Diego
    San Diego, California, United States
    Not yet recruiting
  • Retina Institute of New England
    San Mateo, California, United States
    Not yet recruiting
  • Bay Area Retina Associates - Walnut Creek
    Walnut Creek, California, United States
    Not yet recruiting
  • Retina Consultants of Southern Colorado P.C.
    Colorado Springs, Colorado, United States
    Not yet recruiting
  • Retina Institute of New England, PC
    Waterford, Connecticut, United States
    Not yet recruiting
  • Retina Group of Florida
    Fort Lauderdale, Florida, United States
    Not yet recruiting
  • Florida Retina Institute
    Orlando, Florida, United States
    Not yet recruiting
  • Fort Lauderdale Eye Institute (FLEI)-Plantation
    Plantation, Florida, United States
    Not yet recruiting
  • Illinois Retina Associates
    Oak Park, Illinois, United States
    Not yet recruiting
  • Springfield Clinic
    Springfield, Illinois, United States
    Not yet recruiting
  • Midwest Eye Institute
    Carmel, Indiana, United States
    Not yet recruiting
  • The Retina Group of Washington
    Chevy Chase, Maryland, United States
    Not yet recruiting
  • Cumberland Valley Retina Consultants
    Hagerstown, Maryland, United States
    Not yet recruiting
  • Mid Atlantic Retina Specialist
    Hagerstown, Maryland, United States
    Not yet recruiting
  • Mississippi Retina Associates
    Madison, Mississippi, United States
    Not yet recruiting
  • The Retina Institute
    St Louis, Missouri, United States
    Not yet recruiting
  • NJ Retina
    Edison, New Jersey, United States
    Not yet recruiting
  • NYU Langone Health
    New York, New York, United States
    Not yet recruiting
  • Vitreoretinal Consultants of New York (VRCNY)
    Westbury, New York, United States
    Not yet recruiting
  • North Carolina Retina Associates - Cary Office
    Cary, North Carolina, United States
    Not yet recruiting
  • North Carolina Retina Associates- Wake Forest
    Wake Forest, North Carolina, United States
    Not yet recruiting
  • Retina Associates of Cleveland
    Middleburg Heights, Ohio, United States
    Not yet recruiting
  • EyeHealth Northwest
    Portland, Oregon, United States
    Not yet recruiting
  • Mid Atlantic Retina
    Bethlehem, Pennsylvania, United States
    Withdrawn

+44 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.