NCT04658251Terminated
Study of New Mutations in Cone Disorders
Functional Study of Intronic Variants in Inherited Cone Disorders
Source: ClinicalTrials.gov · Last updated 22 May 2026
Reason given: End of COVID
Brief summary (registry, in English)
High throughput sequencing gives the opportunity to improve the genetic diagnosis for patients suffering from retinal dystrophies and specially from cone disorders. However, a large number of mutations are identified, mostly in introns of the genes, and in silico analysis are not sufficient to assign the pathogenicity of these mutations, without which the diagnosis confirmation cannot be done. For that purpose, a functional analysis of intronic variants of unknown significance detected in patients, with minigene splice assays in parallel with the analysis of the effect of the variant on splicing directly in the cells of the patient, by analyzing the RNA from leucocytes, fibroblasts, lymphoblastoïd cells or precursor of photoreceptor cells, which is the only proof of pathogenicity for variants
- Status (registry)
- Terminated
- Study type
- Observational
- Enrollment
- 7 (actual)
- First submitted
- 1 Dec 2020
- Start date
- 3 Mar 2021
- Primary completion date
- 14 Apr 2024
- Lead sponsor
- University Hospital, Lille
- Diseases
- Macular degeneration
- NCT number
- NCT04658251
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other
- no variant of unknown significance identified
- no informed consent
Who the study is looking for
- clinical diagnosis of cone disorder
- identification of a variant of unknown significance
- possibility of samplings
- informed consent
Age in the registry: 3 years to - · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Save your city in your profile to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| CHU Lille | Lille | France | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.