# CNGB1 and Allied Disorders

> **NCT04639635** · — · SUSPENDED · sponsor: **Columbia University** · enrollment: 20 (estimated)

## Conditions studied

- Retinitis Pigmentosa Associated With CNGB1 Mutations

## Interventions

- **OTHER:** No intervention, this is a natural history progression study

## Key facts

- **NCT ID:** NCT04639635
- **Lead sponsor:** Columbia University
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** SUSPENDED
- **Start date:** 2019-03-14
- **Primary completion:** 2027-02
- **Final completion:** 2027-02
- **Target enrollment:** 20 (ESTIMATED)
- **Why stopped:** IRB renewal lapsed
- **Last updated:** 2026-04-13

## Collaborators

- [object Object]
- [object Object]
- [object Object]
- [object Object]
- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04639635

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04639635, "CNGB1 and Allied Disorders". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04639635. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*