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Completed

NCT Number: NCT06041256

A Phase 1/2 Study of AURN001 in Subjects With Corneal Edema Secondary to Corneal Endothelial Dysfunction (ABA-1)

The goal of this clinical trial is to compare different doses of AURN001 in patients with corneal edema secondary to corneal endothelial dysfunction. The main questions the clinical trial aims to answer are whether AURN001 effective and safe. Participants will receive a single injection of AURN001. A comparison between low, medium, and high doses of AURN001 against the contribution of each element, cells alone and Y27632 alone, will be conducted to determine the effects on corneal edema.

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Key information

Age range

18 year–99 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1 / Phase 2

Primary location

Aurion Biotech site, Vancouver, British Columbia, Canada

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Have a diagnosis of corneal edema secondary to corneal endothelial dysfunction, requiring surgery (full- or partial-thickness endothelial keratoplasty)
  • BCVA between 65 Early Treatment of Diabetic Retinopathy Study (ETDRS) letters (i.e., 0.4 LogMAR or approximate 20/50 Snellen equivalent) and 5 ETDRS letters (i.e., 1.6 LogMAR or approximate 20/800 Snellen equivalent)

Exclusion criteria

  • Have pre-operative corneal epithelial, sub-epithelial or stromal scarring or other opacity that is paracentral/central and visually significant, but not suspected to be secondary to corneal endothelial disease with the potential to improve from treatment in the study eye
  • Have history or presence of an ocular disease other than corneal endothelial dysfunction that could affect vision or safety assessments

Treatment and study plan

AURN001

Combination Product

Corneal Endothelial Cells and Y27632

Corneal Endothelial Cells

Biological

Corneal Endothelial Cells

Y27632

Drug

Y27632

Primary outcomes

  1. Percentage of Participants Achieving ≥15-letter Improvement in Best-corrected Visual Acuity (BCVA) at Month 6 - Imputed Data

    Time frame: Month 6

    Best-corrected visual acuity was assessed using Early Treatment Diabetic Retinopathy Study(ETDRS) method, standard for vision testing. Standardized Sloan letter charts with 5 letters per line, decreasing by 0.1 logarithm of minimum angle of resolution (LogMAR) per line, were used at 4 meters (or 1 meter if ≤19 letters were read, with +0.75 spherical power added). Each correct letter equaled one point (0.02 LogMAR), with 85 letters (0.0 LogMAR) corresponding to 20/20 Snellen, 70 letters (+0.3) to 20/40, and 35 letters (+1.0) to 20/200. A gain of ≥15 letters (0.3 LogMAR, 3 lines) was clinically meaningful. Data from the study eye only were included in the analysis. Participants read letters aloud, guessing encouraged, and all responses recorded for accuracy. Data presented represent number of participants with available BCVA measurements at Month 6, with those who had missing data, underwent rescue surgery before Month 6, or discontinued study prior to Month 6 imputed as non-responders.

Secondary outcomes

  1. Change From Baseline in BCVA at Month 6

    Time frame: Baseline (Day 1) and at Month 6

    Best-corrected visual acuity was assessed using the Early Treatment Diabetic Retinopathy Study (ETDRS) method, the standard for vision testing. Standardized Sloan letter charts with five letters per line, decreasing by 0.1 logarithm of the minimum angle of resolution (LogMAR) per line, were used at 4 meters (or 1 meter if ≤19 letters were read, with +0.75 spherical power added). Each correct letter equaled one point (0.02 LogMAR), with 85 letters (0.0 LogMAR) corresponding to 20/20 Snellen, 70 letters (+0.3) to 20/40, and 35 letters (+1.0) to 20/200. A gain of ≥15 letters (0.3 LogMAR, 3 lines) was clinically meaningful. Data from the study eye only were included in the analysis. Participants read letters aloud, guessing encouraged, and all responses recorded for accuracy. Baseline was defined as the last measurement prior to the study drug injection on Day 1. Change from baseline values was calculated as follow-up visit minus baseline visit.

  2. Change From Baseline in Central Corneal Thickness (CCT) at Month 6

    Time frame: Baseline (Day 1) and at Month 6

    Central corneal thickness was measured by pachymetry which is an essential anatomical marker for detecting the presence or absence of edema and serves as a supportive indicator of treatment efficacy. Baseline was defined as the last measurement prior to the study drug injection on Day 1. Change from baseline values was calculated as follow-up visit minus baseline visit.

  3. Percentage of Participants Achieving ≥15-letter Improvement in BCVA at All Timepoints - Observed Data

    Time frame: At Week 4 and at Months 2, 3, 4.5, 6, 9 and 12

    Best-corrected visual acuity was assessed using the Early Treatment Diabetic Retinopathy Study (ETDRS) method, the standard for vision testing. Standardized Sloan letter charts with five letters per line, decreasing by 0.1 logarithm of the minimum angle of resolution (LogMAR) per line, were used at 4 meters (or 1 meter if ≤19 letters were read, with +0.75 spherical power added). Each correct letter equaled one point (0.02 LogMAR), with 85 letters (0.0 LogMAR) corresponding to 20/20 Snellen, 70 letters (+0.3) to 20/40, and 35 letters (+1.0) to 20/200. A gain of ≥15 letters (0.3 LogMAR, 3 lines) was clinically meaningful. Data from the study eye only were included in the analysis. Participants read letters aloud, guessing encouraged, and all responses recorded for accuracy. The data presented reflect only participants with non-missing BCVA at each corresponding visit.

  4. Change From Baseline in BCVA at All Other Timepoints

    Time frame: Baseline (Day 1) and at Week 4, Months 2, 3, 4.5, 6, 9 and 12

    Best-corrected visual acuity was assessed using the Early Treatment Diabetic Retinopathy Study (ETDRS) method, the standard for vision testing. Standardized Sloan letter charts with five letters per line, decreasing by 0.1 logarithm of the minimum angle of resolution (LogMAR) per line, were used at 4 meters (or 1 meter if ≤19 letters were read, with +0.75 spherical power added). Each correct letter equaled one point (0.02 LogMAR), with 85 letters (0.0 LogMAR) corresponding to 20/20 Snellen, 70 letters (+0.3) to 20/40, and 35 letters (+1.0) to 20/200. A gain of ≥15 letters (0.3 LogMAR, 3 lines) was clinically meaningful. Data from the study eye only were included in the analysis. Participants read letters aloud, guessing encouraged, and all responses recorded for accuracy. Baseline was defined as the last measurement prior to the study drug injection on Day 1. Change from baseline values was calculated as follow-up visit minus baseline visit.

  5. Change From Baseline in CCT at All Other Timepoints

    Time frame: Baseline (Day 1) and at Weeks 1 and 4, Months 2, 3, 4.5, 6, 9, and 12

    Central corneal thickness was measured by pachymetry which is an essential anatomical marker for detecting the presence or absence of edema and serves as a supportive indicator of treatment efficacy. Baseline was defined as the last measurement prior to the study drug injection on Day 1. Change from baseline values was calculated as follow-up visit minus baseline visit.

  6. Percentage of Participants Achieving ≥10-letter Improvement in BCVA at All Timepoints - Observed Data

    Time frame: At Week 4 and at Months 2, 3, 4.5, 6, 9 and 12

    Best-corrected visual acuity was assessed using the Early Treatment Diabetic Retinopathy Study (ETDRS) method, the standard for vision testing. Standardized Sloan letter charts with five letters per line, decreasing by 0.1 logarithm of the minimum angle of resolution (LogMAR) per line, were used at 4 meters (or 1 meter if ≤19 letters were read, with +0.75 spherical power added). Each correct letter equaled one point (0.02 LogMAR), with 85 letters (0.0 LogMAR) corresponding to 20/20 Snellen, 70 letters (+0.3) to 20/40, and 35 letters (+1.0) to 20/200. A gain of ≥15 letters (0.3 LogMAR, 3 lines) was clinically meaningful. Data from the study eye only were included in the analysis. Participants read letters aloud, guessing encouraged, and all responses recorded for accuracy. The data presented reflect only participants with non-missing BCVA at each corresponding visit.

Sponsors and collaborators

Lead sponsor

Aurion Biotech

Industry

Registry information

Official study title

CLARA: A Phase 1/2 Multi-center, Randomized, Double-Masked, Prospective, Parallel-Arm Study of AURN001 in Subjects With Corneal Edema Secondary to Corneal Endothelial Dysfunction (ABA-1)

Acronym: CLARA

Important dates

Study start
2023
Primary completion
2024
Study completion
2025
First posted
Sep 18, 2023
Registry last updated
Dec 17, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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