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Corneal EdemaPhase 1/2CLARANCT06041256

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

A Phase 1/2 study testing AURN001, Corneal Endothelial Cells and Y27632 in people with Corneal Edema and Corneal Endothelial Dysfunction, run by Aurion Biotech at 20 sites in 2 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

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. Read more about this study

Who is it for?
Ages 18 to 99 years
What is being tested?
AURN001, Corneal Endothelial Cells and Y27632
Could I receive a placebo?
No, everyone receives an active treatment
How many people
97 participants
Where
20 sitesin 2 countries
Study dates
18 Oct 2023to 15 Apr 2025
Phase
Phase 1/2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 99 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • 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)

Who cannot join

  • 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

Trial locations and contacts

20 sites in 2 countries.

20 sites in 2 countries

United States17 sites
  • Aurion Biotech site

    Atlanta, Georgia, 30339

  • Aurion Biotech site

    Bala-Cynwyd, Pennsylvania, 19004

  • Aurion Biotech site

    Cincinnati, Ohio, 45242

  • Aurion Biotech site

    Garden City, New York, 11576

  • Aurion Biotech site

    Houston, Texas, 77027

  • Aurion Biotech site

    Houston, Texas, 77055

  • Aurion Biotech site

    Indianapolis, Indiana, 46260

  • Aurion Biotech site

    Little Rock, Arkansas, 72205

  • Aurion Biotech site

    Los Angeles, California, 90067

  • Aurion Biotech site

    Minnetonka, Minnesota, 55305

  • Aurion Biotech site

    Norfolk, Virginia, 23502

  • Aurion Biotech site

    Oklahoma City, Oklahoma, 73104

  • Aurion Biotech site

    San Francisco, California, 94158

  • Aurion Biotech site

    Seattle, Washington, 98125

  • Aurion Biotech site

    Sioux Falls, South Dakota, 57108

  • Aurion Biotech site

    Wichita, Kansas, 67206

  • Aurion Biotech site

    Winston-Salem, North Carolina, 27157

Other trials in United States

Canada3 sites
  • Aurion Biotech site

    Oakville, Ontario, L6H 0J8 CAN

  • Aurion Biotech site

    Toronto, Ontario, M5T 3A9 CAN

  • Aurion Biotech site

    Vancouver, British Columbia, V5Z 1K1 CAN

Other trials in Canada

About this study

Official 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)

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.

Being tested
AURN001, Corneal Endothelial Cells, Y27632
Medical subject headings
Corneal Edema

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • AURN001Combination product

    Corneal Endothelial Cells and Y27632

  • Corneal Endothelial CellsBiological

    Corneal Endothelial Cells

  • Y27632Drug

    Y27632

Study groups in NCT06041256
Study groupRoleWhat they receive
AURN001 HighExperimentalNeltependocel High and Rho-associated protein kinase
Receives: Combination Product: AURN001
AURN001 MediumExperimentalNeltependocel Medium and Rho-associated protein kinase
Receives: Combination Product: AURN001
AURN001 LowExperimentalNeltependocel Low and Rho-associated protein kinase
Receives: Combination Product: AURN001
NeltependocelExperimentalNeltependocel - High
Receives: Biological: Corneal Endothelial Cells
ROCKExperimentalRho-associated protein kinase (ROCK)
Receives: Drug: Y27632

What is being measured

The primary outcome is the main question the study is designed to answer.

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

    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.

    Measured: Month 6

Secondary outcomes (6)
  1. Change From Baseline in BCVA 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.

    Measured: Baseline (Day 1) and at Month 6

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

    Measured: Baseline (Day 1) and at Month 6

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

    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.

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

  4. Change From Baseline in BCVA at All Other Timepoints

    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.

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

  5. Change From Baseline in CCT at All Other Timepoints

    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.

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

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

    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.

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

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 Sep 2023
  2. Study start18 Oct 2023
  3. Primary completion25 Oct 2024
  4. Study completion15 Apr 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
97 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06041256
Sponsor's protocol ID
ABA-1
Acronym
CLARA
Status last verified
Dec 2025
First submitted
11 Sep 2023
Last updated
17 Dec 2025
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing AURN001, Corneal Endothelial Cells and Y27632 in people with Corneal Edema and Corneal Endothelial Dysfunction, run by Aurion Biotech at 20 sites in 2 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 17 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 20 sites in United States, Canada. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 17 Dec 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percentage of Participants Achieving ≥15-letter Improvement in Best-corrected Visual Acuity (BCVA) at Month 6 - Imputed Data (time frame: Month 6). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Dec 2025; AzTrials last refreshed its copy on 6 Nov 2026.

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