NGS Panel of Incomplete Forms of Ocular Albinism (DIA)

June 14, 2023 updated by: University Hospital, Bordeaux

Implementation of a Next-generation Sequencing Analysis of a Panel of Genes Implicated in Incomplete Forms of Albinism

Implementation of a next-generation sequencing panel of genes to identify deleterious variants in patients with incomplete forms of albinism.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Scientific context : Albinism is clinically characterised by cutaneous hypopigmentation and ophthalmologic features. These features common to all forms of albinism are foveal hypoplasia, misrouting of the optic nerves at the chiasm, retinal hypopigmentation, translucent irides and nystagmus. The molecular genetic lab at Bordeaux University Hospital is the national reference for the study of this disease. More than 1400 patients have been analyzed with a strategy including next-generation sequencing of the 19 known genes of albinism and array-CGH. Despite this thorough analysis, 25% of patients remain without molecular diagnosis. Our experience tells us that these patients often show an incomplete form of albinism with the presence of only few ophthalmologic signs. The molecular diagnosis is very challenging as the phenotype often overlaps with other ophthalmologic disorders.

Study Type

Observational

Enrollment (Estimated)

100

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

1 second and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patient with a clinical diagnosis of incomplete form of albinism with presence of at least 2 signs of ocular albinism among which nystagmus, low vision, foveal hypoplasia, retinal hypopigmentation, translucent irides, misrouting of the optic nerves at the chiasm and having a specialized consultation in CHU de Bordeaux

Description

Inclusion Criteria:

  • Minor and adult patient.
  • Patient presenting a clinical diagnosis of incomplete form of albinism with presence of at least 2 signs of ocular albinism among which nystagmus, low vision, foveal hypoplasia, retinal hypopigmentation, translucent irides, misrouting of the optic nerves at the chiasm.
  • Registered for the social security system.
  • Informed consent signed by patient or parent of a minor patient.

Exclusion Criteria:

  • Refusal to participate in research protocol.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Patient with a diagnosis of incomplete form of albinism
Biological: Blood samples
Performed a 10 ml blood sample (2 unnamed samples of 5ml) in each of the 100 patients included.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of patients for whom a molecular diagnosis is obtained based on the panel of targeted genes
Time Frame: Enrollment
the prevalence of finding at least two pathogenic variants is 10%.
Enrollment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University Hospital, Bordeaux

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

November 23, 2020

Primary Completion (Estimated)

June 1, 2024

Study Completion (Estimated)

June 1, 2024

Study Registration Dates

First Submitted

July 20, 2020

First Submitted That Met QC Criteria

July 28, 2020

First Posted (Actual)

July 31, 2020

Study Record Updates

Last Update Posted (Actual)

June 15, 2023

Last Update Submitted That Met QC Criteria

June 14, 2023

Last Verified

June 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CHUBX 2019/52

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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