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NCT Number: NCT07594236

Phase 1 Study of C.001 in Retinal Degeneration

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.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Primary location

Clinical Trial Site 1

Beverly Hills, California, 90210, United States

Location status: Recruiting

Location contact

Clinical Trial Administer

CONTACT

[email protected]

regulatory@celliotherapeutics.

About this study

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.

Who can participate

Healthy volunteers accepted: No

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

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

Treatment and study plan

Injection

Biological

C.001 administered once via subretinal injection

Primary outcomes

  1. Incidence of Ocular and Systemic Adverse Events

    Time frame: 3 months

Secondary outcomes

  1. Change in visual function measured in EDTRS letters

    Time frame: 3 months

  2. Findings of anatomic change on optical coherence tomography (OCT)

    Time frame: 3 months

Sponsors and collaborators

Lead sponsor

Cellio Therapeutics Inc

Industry

Collaborators

  • California Institute for Regenerative Medicine (CIRM)

Registry information

Official study title

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

Important dates

Study start
2026
Primary completion
2028
Study completion
2029
First posted
May 18, 2026
Registry last updated
Jun 12, 2026

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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