DT-168 for people with Fuchs endothelial corneal dystrophy who are having a corneal transplant
Official title: A Phase 2, Multicenter, Open-Label Study to Assess the Pharmacodynamics, Safety, and Tolerability of DT-168 Ophthalmic Solution in Patients With Fuchs Endothelial Corneal Dystrophy Undergoing Keratoplasty
Run by Design Therapeutics, Inc. · NCT07024693 · Data updated 2026-11-12
This study will test whether DT-168 eye drops are safe, well tolerated, and how they act in people with Fuchs endothelial corneal dystrophy who are scheduled for corneal transplant.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 30 Years and up |
| Sex | All |
| Enrollment | 70 (estimated) |
| Sponsor | Design Therapeutics, Inc. Industry-sponsored |
| Locations | 2 sites (Indianapolis, Indiana and 1 other locations) |
| Status | Recruiting |
| Started | July 30, 2025 |
| Main results expected | December 2027 |
| Study ends | December 2027 |
| Registry record updated | September 28, 2026 |
| Trial ID | NCT07024693 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults aged 30 or older with documented FECD in the study eye, a confirmed TCF4 CTG expansion in at least one allele, who are scheduled for keratoplasty and can give informed consent.
✕Probably not a fit
Patients without the TCF4 CTG expansion, those not planning keratoplasty, or those with other significant ocular or medical conditions that would confound results are unlikely to benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This Phase 2 interventional study administers DT-168 ophthalmic solution to patients with Fuchs endothelial corneal dystrophy who are scheduled to undergo keratoplasty, with the goal of characterizing pharmacodynamics, safety, and tolerability. Eligible participants must be at least 30 years old, have a documented diagnosis of FECD in the study eye, and carry a confirmed TCF4 allele CTG expansion. Treatments are given in the pre-keratoplasty period with regular in-person assessments for ocular measurements, pharmacodynamic sampling, and safety monitoring at study visits. Keratoplasty is performed as planned independent of study participation, and outcomes focus on corneal pharmacodynamic markers, adverse events, and participant-reported tolerability.
Why it matters
Potential benefit: If successful, DT-168 eye drops could offer a safe preoperative treatment that improves corneal biology or preserves endothelial function before transplant.
How similar studies have gone: This approach is relatively novel and there are limited prior clinical data showing success with DT-168 specifically.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Participant is scheduled to undergo a keratoplasty for management of FECD independent of this study. * ≥30 years of age (inclusive). * Documented diagnosis of FECD in the study eligible eye. * Confirmation of positive TCF4 allele 18.1 CTG expansion in at least one allele. * Capable of giving signed informed consent. Exclusion Criteria: * Any ocular or medical condition in the study eligible eye which is clinically significant or would confound study results or data interpretation. * Any clinically significant medical, nonmedical, and psychiatric disorders that could put the participant at higher risk for participation in the study, impair the participant's ability to participate in the study, or interfere with interpretation of the participant's study results, in the opinion of the investigator. * Concurrent or anticipated need for treatment for FECD, eg, Muro 128 (2% or 5%) during the course of the study in the study eye. Provided the subject undergoes a washout of Muro drops for at least 24 hours prior to the Baseline Visit, they will not be excluded. * Concurrent or anticipated use of topical corticosteroids in the study eye. * Concurrent use with Rhopressa®, Rocklatan®, or any other ocular Rho Kinase inhibitor. * Known contraindication, allergy, or hypersensitivity to any of the treatments, anesthetics, or diagnostic agents or components thereof which may be used during the study. * Use of contact lenses in the study eye within 7 days prior to the Baseline Visit or planned use during the study. * Recent (within 30 days of the Screening Visit) or ongoing participation in any other investigational interventional clinical study. * Female participant is pregnant, planning a pregnancy, or breast-feeding. * Participant is unwilling to comply with the contraceptive requirements, as per protocol.
Where it's running
-
DTX-168-201 Study Site
Indianapolis, Indiana, United States Recruiting -
DTX-168-201 Study Site
Grand Rapids, Michigan, United States Recruiting
Study contacts
- Study coordinator: Mark Daniels
- Email: mark@designtx.com
- Phone: 858-293-4948
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
EO2002 therapy for corneal edema due to endothelial dysfunction
This trial tests whether a single intracameral injection of EO2002 cells can improve vision and reduce corneal thickness in adults with corneal edema from endothelial dysfunction.
-
Polishing the Descemet membrane before endothelial keratoplasty for Fuchs endothelial corneal dystrophy
This trial tests whether polishing the diseased Descemet membrane before injecting cultured endothelial cells helps improve graft adhesion and outcomes for people with Fuchs endothelial corneal dystrophy.
-
Lying on your back after DMEK: 1 day versus 5 days
This trial sees if lying on your back for five days after DMEK surgery helps the transplant stick better than lying on your back for one day for people with Fuchs endothelial corneal dystrophy or corneal failure.
-
VALIDATING the SUCCESS Score to predict need for endothelial keratoplasty after cataract surgery in Fuchs dystrophy
This study will test whether the SUCCESS Score, with corneal densitometry, can predict which people with Fuchs endothelial corneal dystrophy having cataract surgery will later need endothelial keratoplasty.
-
Comparing femtosecond laser-assisted versus conventional cataract surgery for people with Fuchs endothelial corneal dystrophy
This study will test whether femtosecond laser-assisted cataract surgery or conventional phacoemulsification better preserves corneal endothelial cells and vision in adults with moderate to severe Fuchs endothelial corneal dystrophy who need cataract surgery.
-
Observing outcomes of posterior lamellar keratoplasty for eye conditions
This study looks at how well two types of eye surgeries for conditions like Fuchs' dystrophy and bullous keratopathy work in helping patients see better over time.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.