NCT04639635Suspended
CNGB1 and Allied Disorders
Study of CNGB1 Retinitis Pigmentosa and Allied Hereditary Disorders
Source: ClinicalTrials.gov · Last updated 13 Apr 2026
Brief summary (registry, in English)
Mutations in the rod-expressed gene, cyclic nucleotide-gated channel beta subunit (CNGB1) and associated inborn errors in metabolism are causes of retinal disease that causes progressive loss of vision. Retinitis pigmentosa (RP) is a major cause of untreatable blindness associated with CNGB1 (CNGB1-RP). RP involves the death of photoreceptor cells that can be caused by mutations in a number of different genes. Treatment by gene therapy could prevent blindness in cases of inherited retinal dystrophies including RP. In the future RP due to mutations in CNGB1 may be treatable by gene therapy since this form of photoreceptor degeneration involves a slow loss of rod photoreceptor cells. This provides a wide window of opportunity for the identification of patients and initiation of treatment. Our efforts are directed toward developing gene therapy as a treatment. To this end, our objective is to better understand the disease process of CNGB1-RP and other allied inherited disorders so that we can develop clinical tests to measure the outcomes of treatment.
- Status (registry)
- Suspended
- Study type
- Observational
- Enrollment
- 20 (estimated)
- First submitted
- 7 Aug 2020
- Start date
- 14 Mar 2019
- Primary completion date
- Feb 2027
- Lead sponsor
- Columbia University
- Diseases
- Retinitis pigmentosa
- NCT number
- NCT04639635
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Who the study is looking for
- Diagnosis of CNGB1-associated RP by study physician, who are trained retinal specialists in the university clinic
- Must be able to commit to 4 follow-up study visits (3 years)
Sex: All · Does not accept healthy volunteers
Sites (6)
Sites in registry order. Save your city in your profile to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Klinikum der Universität München University Eye Hospital, Ludwig-Maximilians-University (LMU) Munich | München | Germany | Unknown status |
| Eberhard Karls University Tubingen | Tübingen | Germany | Unknown status |
| Institut de la Vision/Centre de maladies rares du Centre Hospitalier National Ophtalmologique des Quinze-Vingts | Paris | France | Unknown status |
| Moorfields Eye Hospital NHS Foundation Trust | London | United Kingdom | Unknown status |
| Dr. Stephen H. Tsang | New York | United States | Unknown status |
| Wills Eye Hospital | Philadelphia | United States | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.