Phase 1 Study of C.001 in Retinal Degeneration

May 14, 2026 updated by: Cellio Therapeutics Inc

A Phase I Single-Center Open-label Study of C.001 in Patients With Significant Retinal Pigment Epithelium Mediated Maculopathy (RMM)

This is a first-in-human Phase 1 study evaluating the safety and tolerability of C.001 in patients with retinal diseases involving degeneration of the retinal pigment epithelium.

Participants will receive a single administration of C.001 delivered by subretinal injection. The study will evaluate three dose levels in a sequential manner.

The primary objective is to assess the safety of C.001 over a 3-month period following administration. Participants will be followed for up to 12 months to further evaluate safety and explore changes in visual function and retinal structure.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

This is a Phase 1, single-center, open-label, dose-escalation study designed to evaluate the safety and tolerability of C.001 administered via subretinal injection.

Participants will be enrolled into three sequential dose cohorts. A sentinel dosing strategy will be used, with safety review by an independent Data Safety Monitoring Board (DSMB) prior to escalation to higher dose levels. A minimum observation period of 4 weeks will be required between dose escalations.

Participants will be followed for up to 12 months after treatment for safety assessments and exploratory evaluation of visual and anatomical outcomes.

Study Type

Interventional

Enrollment (Estimated)

15

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Age ≥18 years
  • Diagnosis of retinal disease associated with retinal pigment epithelium degeneration (e.g., geographic atrophy or Stargardt disease)
  • Visual acuity within protocol-defined limits
  • Stable ocular condition prior to enrollment
  • Medically suitable for ophthalmic surgery and anesthesia
  • Willingness to comply with study procedures and follow-up

Exclusion Criteria:

  • Active or prior choroidal neovascularization (CNV)
  • Recent myocardial infarction or significant uncontrolled cardiovascular disease
  • Uncontrolled glaucoma
  • Significant ocular inflammatory disease
  • Recent intraocular surgery within protocol-defined timeframe
  • Active systemic infection
  • Poorly controlled diabetes (e.g., HbA1c >8.5%)
  • Participation in another investigational study within 3 months prior to screening

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Arm 1
C.001Low Dose
Biological: Injection
C.001 administered once via subretinal injection
Experimental: Arm 2
C.001 Medium Dose
Biological: Injection
C.001 administered once via subretinal injection
Experimental: Arm 3
C.001 High Dose
Biological: Injection
C.001 administered once via subretinal injection

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Incidence of Ocular and Systemic Adverse Events
Time Frame: 3 months
3 months

Secondary Outcome Measures

Outcome Measure
Time Frame
Change in visual function measured in EDTRS letters
Time Frame: 3 months
3 months
Findings of anatomic change on optical coherence tomography (OCT)
Time Frame: 3 months
3 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Cellio Therapeutics Inc

Collaborators

California Institute for Regenerative Medicine (CIRM)

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 7, 2026

Primary Completion (Estimated)

December 31, 2028

Study Completion (Estimated)

December 31, 2029

Study Registration Dates

First Submitted

April 17, 2026

First Submitted That Met QC Criteria

May 14, 2026

First Posted (Actual)

May 18, 2026

Study Record Updates

Last Update Posted (Actual)

May 18, 2026

Last Update Submitted That Met QC Criteria

May 14, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CT-C.001-001
  • CLIN2-19416 (Other Grant/Funding Number: California Institute of Regenerative Medicine)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Geographic Atrophy

Clinical Trials on Injection

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Rwanda

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe