NCT04868916Completed
An Observational Study of Japanese Participants With X-linked Retinitis Pigmentosa
Prospective Observational Study to Estimate the Genotype and Phenotype of Japanese Patients With X-linked Retinitis Pigmentosa Associated With Pathogenic Variants in Retinitis Pigmentosa GTPase Regulator (RPGR)
Source: ClinicalTrials.gov · Last updated 25 Apr 2025
Brief summary (registry, in English)
The purpose of the study is to identify a cohort of Japanese participants with X-linked retinitis pigmentosa (XLRP) associated with pathogenic variants in the retinitis pigmentosa GTPase regulator (RPGR) gene and to investigate their associated phenotype.
- Status (registry)
- Completed
- Study type
- Observational
- Enrollment
- 15 (actual)
- First submitted
- 28 Apr 2021
- Start date
- Jul 2021
- Primary completion date
- Apr 2024
- Lead sponsor
- Janssen Pharmaceutical K.K.
- Diseases
- Retinitis pigmentosa
- NCT number
- NCT04868916
What you commit to
- Study type: Observational
- Participants enrolled: 15
- From Jul 2021 to the primary completion date, Apr 2024
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Participated in another research study and had intraocular surgery within 3 months of screening
Other illness
- Significant ophthalmologic diseases
Other
- Are unable or unwilling to undertake consent or clinical testing
Who the study is looking for
- Have RPGR-associated retinal dystrophy
- Are able to give informed consent or assent, with the guidance of their parent/guardian where appropriate
- Are able to undertake age-appropriate clinical assessments as specified in the protocol
Age in the registry: 5 years to - · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| National Hospital Organization Tokyo Medical Center Coordinator of this site? Confirm its status | Tokyo | Japan | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.