NCT06452316 · Claris Biotherapeutics, Inc.
Study to Evaluate the Safety and Efficacy of CSB-001 Ophthalmic Solution 0.1% in Subjects With Limbal Stem Cell Deficiency
What this study is about
This study will enroll subjects with qualifying limbal stem cell deficiency (LSCD). All subjects will receive CSB-001 experimental drug in either one or both study eyes. The study is comprised of two identical phases (Dosing Phase I and II) of test article dosing separated by a 31- to 40-day period, the Dosing Holiday, where no test article is administered.
View original scientific description
This study will enroll subjects with qualifying limbal stem cell deficiency (LSCD). All subjects will receive CSB-001 investigational drug in either one or both study eyes. The study is comprised of two identical phases (Dosing Phase I and II) of test article dosing separated by a 31- to 40-day period, the Dosing Holiday, where no test article is administered. Dosing Phase II is followed by an observational, noninterventional phase (Observation Phase).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Have an area of the central 5 mm zone of cornea affected, presence of at least one clinical sign observed by slit-lamp examination with white light and/or cobalt blue light, fluorescein, and a Wratten filter, and at least one clinical sign observed with AS-OCT.
- If dosing with Acthar at time of Screening Visit, must have a history of stable dosing for approximately 8 weeks, plan to maintain the same Acthar treatment dose and regimen, and have demonstrated little to no improvement in severity of LSCD.
- Sponsor written confirmation of qualifying LSCD diagnosis.
- Inflammation associated with LSCD or other non-infectious inflammation that will not interfere with subject's participation.
Exclusion criteria
- Any active ocular infection (bacterial, viral, fungal, or protozoan) in either eye.
- Ocular surgery within 30 days of Day 0 where investigator assesses that healing is not considered complete/stable.
- Planned ocular surgery on or before Week 20 visit.
- Presence or history of any ocular or systemic disorder, condition, or procedure that might hinder the efficacy of the study treatment or its evaluation, or could interfere with the interpretation of study results, in the opinion of the investigator. Note: Other inclusion/exclusion criteria apply.
Where
- Loma Linda, California
- Carmel, Indiana
- Indianapolis, Indiana
- Minnetonka, Minnesota
- Portland, Oregon
- San Antonio, Texas
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Apr 30, 2026 · Source of record for eligibility and locations