Under construction – not a live service
Sign in

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
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

Full criteria on ClinicalTrials.gov

Sites (6)

Sites in registry order. Save your city in your profile to sort them by distance.

SiteCityCountrySite status
Klinikum der Universität München University Eye Hospital, Ludwig-Maximilians-University (LMU) MunichMünchenGermanyUnknown status
Eberhard Karls University TubingenTübingenGermanyUnknown status
Institut de la Vision/Centre de maladies rares du Centre Hospitalier National Ophtalmologique des Quinze-VingtsParisFranceUnknown status
Moorfields Eye Hospital NHS Foundation TrustLondonUnited KingdomUnknown status
Dr. Stephen H. TsangNew YorkUnited StatesUnknown status
Wills Eye HospitalPhiladelphiaUnited StatesUnknown status

Are you the coordinator? Confirm the details

This page is information, not medical advice. Discuss any trial with your doctor.