NCT04565756

A Study to Evaluate the Safety and Tolerability of EXN407

A Randomised, Double-Masked Vehicle-Controlled, Multiple Dose, Dose Escalation Study To Evaluate The Safety and Tolerability of EXN407 in Subjects With Centre Involved Diabetic Macular Oedema Secondary to Diabetes Mellitus

• Status: Completed
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 48 (actual)
• Sponsor: Exonate Limited · Industry
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This first in human (FIH), Phase Ib/II study of EXN407 is a randomised, double-masked, vehicle-controlled, multiple dose, dose-escalating study to evaluate the safety and tolerability of EXN407 in subjects with centre involved Diabetic Macular Oedema (DMO), with Centre-subfield macular thickness (CMT) between 280-420 µm and Best corrected visual acuity (BCVA) better than or equal to 69 ETDRS score (approximate Snellen equivalent 20/40 (6/12 letters) in the study eye, which is considered secondary to diabetes mellitus. This study will provide a basis for further clinical development of EXN407 ophthalmic solution.

Detailed description

EXN407 or vehicle-control solution administered unilaterally to the study eye only. To select the study eye the Investigator examines the subjects and identifies which eye exhibits centre involved DMO with a CMT between 280-420 μm (as determined by SD-OCT). Further, all other inclusion/exclusion criteria required to be met. Dose Escalation Cohorts The study assesses the safety and tolerability of EXN407 in eligible subjects with center involved Diabetic Macular Oedema (DMO) at up to 3 escalating dose (concentration) levels and placebo (vehicle) consisting of an excipient formulation adjusted for osmolality. EXN407 or vehicle-control administered as a single 30 μL drop by unilateral eye drop administration to the study eye only, and the drops dosed BID for 7 days. Subjects assessed throughout the treatment period for safety, tolerability, and efficacy at Follow-up visits. Each of the ascending dose subject cohorts consists of 4 subjects (3 subjects randomised to receive EXN407 and 1 subject randomised to receive placebo). Dose Expansion Cohort The highest well tolerated dose of EXN407 (as recommended by the DEC) is evaluated in a subject expansion cohort in eligible subjects with center involved Diabetic Macular Oedema (DMO) which consists of up to a maximum of 40 subjects (randomised to receive EXN407 at the selected dose or vehicle at a 2:1 drug: placebo ratio). Each eligible subject in the expansion cohort to receive study drug for up to 84 days, resulting in a total of 168 doses (168 single drops of 30 μL volume) of EXN407 or vehicle.

Conditions

• Diabetic Macular Edema

Interventions

Type	Name	Description
DRUG	EXN407	EXN407 or placebo will be administered as a single 30 microliters drop twice a day, by unilateral eye drop administration to the study eye only.

Timeline

• Start date: 2020-11-05
• Primary completion: 2022-10-25
• Completion: 2022-11-29
• First posted: 2020-09-25
• Last updated: 2025-05-09
• Results posted: 2025-05-09

Locations

11 sites across 1 country: Australia