Clinical Trial: Various Type of Genetic Events in Patients With Intellectual Disability

Study Status: Not yet recruiting
Recruit Status: Not yet recruiting
Study Type: Observational

Official Title: Evaluation of Tools for the Simultaneous Detection of Point and Structural Mutations in Patients With Intellectual Disability

Brief Summary: Currently, for a patient with intellectual disability without a recognizable syndrome (most cases), the way to diagnosis is often long, tedious and expensive because different approaches are used one after the other to identify structural variants (duplications, deletions and other) and point mutations (sequencing of one or more candidate genes). The development of high-throughput sequencing techniques (next generation sequencing: NGS) has drastically increased the detection of point mutations offering the possibility to test a large number of genes simultaneously. NGS also shows a huge potential in detecting structural variants. The objective of this research is to assess the sensitivity of a simultaneous detection of point mutations and structural variants by NGS approaches. This would bring together in a single step the equivalent of performing an array-Comparative genomic hybridization (CGH) analysis plus performing a targeted sequencing of candidate genes. Investigators will compare two approaches for this simultaneous detection: a targeted enrichment of candidate genes coding regions using probes covering these regions associated with a backbone of genomic probes, an approach that could be implemented immediately in diagnostic at the hospital, and a whole genome sequencing (WGS), that is currently a too expensive tool for routine diagnosis but that should be the approach used in the future. Investigators will compare these two approaches to the traditional one: CGH array + WGS. The implementation of a "one step" strategy to detect both types of mutations (punctual and structural) would accelerate and improve the access of patients to a molecular diagnosis.

Detailed Summary:
Sponsor: University Hospital, Strasbourg, France

Current Primary Outcome: Detection of mutation from the CGH-array technology on 475 genes [ Time Frame: One year ]

Original Primary Outcome: Same as current

Current Secondary Outcome:

Original Secondary Outcome:

Information By: University Hospital, Strasbourg, France

Dates:
Date Received: August 16, 2016
Date Started: September 2016
Date Completion: December 2017
Last Updated: August 23, 2016
Last Verified: August 2016