A Study of Encapsulated Cell Technology (ECT) Implant for Participants With Early Stage Retinitis Pigmentosa
Public ClinicalTrials.gov record NCT00447980. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase II/III Study of Encapsulated Human NTC-201 Cell Implants Releasing Ciliary Neurotrophic Factor (CNTF) for Participants With Retinitis Pigmentosa Using Visual Field Sensitivity as the Primary Outcome
Study identification
- NCT ID
- NCT00447980
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- Neurotech Pharmaceuticals
- Industry
- Enrollment
- 73 participants
Conditions and interventions
Conditions
Interventions
- NT-501 Drug
Drug
Eligibility (public fields only)
- Age range
- 18 Years to 64 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jan 21, 2007
- Primary completion
- Apr 18, 2010
- Completion
- Apr 18, 2010
- Last update posted
- Apr 30, 2025
2007 – 2010
United States locations
- U.S. sites
- 12
- U.S. states
- 9
- U.S. cities
- 11
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Retina-Vitreous Associates Medical Group | Beverly Hills | California | 90211 | — |
| University of Califoria, Davis | Sacramento | California | 95817 | — |
| University of California, San Francisco | San Francisco | California | 94143-0730 | — |
| Bascom Palmer Eye Insitute | Miami | Florida | 33101 | — |
| Kellogg Eye Center | Ann Arbor | Michigan | 48105 | — |
| University of Minnesota | Minneapolis | Minnesota | 55455-0501 | — |
| NY University Medical Center | New York | New York | 10016 | — |
| Casey Eye Institue | Portland | Oregon | 97239-4197 | — |
| The Hamilton Eye Institute | Memphis | Tennessee | 38163 | — |
| Retina Foundation of Southwest | Dallas | Texas | 75231 | — |
| University of Utah | Salt Lake City | Utah | 84112 | — |
| The University of Utah - John A. Moran Eye Center | Salt Lake City | Utah | 84132 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00447980, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Apr 30, 2025 · Synced Jul 22, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00447980 live on ClinicalTrials.gov.