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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
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

Full criteria on ClinicalTrials.gov

Sites (1)

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

SiteCityCountrySite status
CHU LilleLilleFranceUnknown status

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