A Phase 1/ Phase 2 Study of TTHX1114(NM141)

A Phase 1/ Phase 2 Study Evaluating the Safety and Efficacy of the Investigational New Drug TTHX1114(NM141) on the Regeneration of Corneal Endothelial Cells in Patients With Corneal Endothelial Dystrophies Following Intracameral Delivery

Prospective, multicenter, randomized, masked, vehicle-controlled, dose-escalation study

This is a prospective, multi-center, randomized, masked, vehicle-controlled, dose-escalation study that will include an observational (no intervention) sub-study. Eligible subjects with moderate to severe corneal endothelial dystrophy (defined as Endothelial Cell Density < 2000 mm^2) in at least one eye will be enrolled and randomized.

Key Inclusion Criteria:

• Fuchs Endothelial Corneal Dystrophy, pseudophakic bullous keratopathy, or endothelial dysfunction/ insufficiency due to surgical intervention diagnosed more than 6 months prior to Study Day 0
• Central endothelial cell count of < 2000 mm^2 in at least one eye as determined by the central reading facility

Key Exclusion Criteria:

• Conditions that would impair examination of the anterior chamber structure
• Documented repeated elevated intra ocular pressure (in either eye)
• Corneal transplant (in either eye)
• Posterior Polymorphous Corneal Dystrophy (PPCD)
• History of uveitis or herpetic keratitis
• Cataract surgery within the past 3 months
• Refractive surgery (in the Study Eye)
• Anterior Chamber IOL placement (in the Study Eye)
• Active extra-ocular inflammation from any non-infectious or infectious cause within the past 6 months
• Expected or planned ocular surgery within the next 3 months
• Use of cytotoxic chemotherapy within the last 1 month
• Treatment with a rho kinase inhibitor within the last 3 months
• Use of cyclosporine ophthalmic emulsion or lifitegrast ophthalmic solution in the last 30 days
• Systemic or ophthalmic corticosteroid use in the 30 days prior to Study Day 0 unless approved by the Medical Monitor
• History of significant allergy, hypersensitivity, or intolerance to any drug compound, food, or other substance
• Unwilling to use birth control