search
Back to results

New Genes Involved in Molecular Etiology of Rett Syndrome Through DNA Microarray Comparative Genomic Hybridization (RETT)

Primary Purpose

Rett Syndrome

Status
Completed
Phase
Not Applicable
Locations
France
Study Type
Interventional
Intervention
Blood sampling
Sponsored by
Central Hospital, Nancy, France
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional basic science trial for Rett Syndrome

Eligibility Criteria

undefined - undefined (Child, Adult, Older Adult)All SexesAccepts Healthy Volunteers

Inclusion Criteria:

  • Patients: RETT syndrome
  • Patients: Female
  • Parents: parent of a patients

Sites / Locations

  • Handicaps de l'Enfant - Pavillon Ste Marie, CHU St Jacques
  • Service de Neuropédiatrie, Hôpital St Jacques, CHU de Besançon
  • Unité de génétique, Groupe hospitalier Hôpital Flaubert
  • Centre de Génétique Hôpital d'Enfants, CHU de Dijon
  • Service de neuropédiatrie, CHU Hôpital Gui de Chauliac
  • Laboratoire de Génétique chromosomique, CHU Hôpital l'Archet 2
  • Service de génétique médicale, CHU Hôpital Purpan
  • Service de génétique médicale, CHU Hôpital Purpan, CHU de Toulouse
  • Laboratoire de Génétique, Hôpitaux de Brabois, CHU de Nancy

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Experimental

Arm Label

RTT patient

Parents

Arm Description

Blood sampling

Blood sampling. To distinguish between inherited polymorphic variants and potentially deleterious new imbalances.

Outcomes

Primary Outcome Measures

Analysis of chromosomal imbalances through comparative genomic hybridization on DNA microarrays
Search for pathogenic chromosomal imbalance

Secondary Outcome Measures

Full Information

First Posted
August 23, 2016
Last Updated
August 26, 2016
Sponsor
Central Hospital, Nancy, France
search

1. Study Identification

Unique Protocol Identification Number
NCT02885090
Brief Title
New Genes Involved in Molecular Etiology of Rett Syndrome Through DNA Microarray Comparative Genomic Hybridization
Acronym
RETT
Official Title
Search for New Genes Involved in Molecular Etiology of Rett Syndrome Through Comparative Genomic Hybridization on DNA Microarrays
Study Type
Interventional

2. Study Status

Record Verification Date
August 2016
Overall Recruitment Status
Completed
Study Start Date
February 2010 (undefined)
Primary Completion Date
May 2011 (Actual)
Study Completion Date
May 2011 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Central Hospital, Nancy, France

4. Oversight

Data Monitoring Committee
No

5. Study Description

Brief Summary
Rett syndrome (RTT) is a genetic encephalopathy and the typical form is caused by mutations in the gene MECP2. It is a genetically heterogeneous pathology. CDKL5 and FOXG1 have been recently discovered being involved in other forms of RTT. However, at least 5% of typical forms and more other atypical forms are not linked to any of 3 genes known to be involved in the disease. The purpose of this study is to identify new genes involved in molecular etiology of typical and atypical forms of RTT.
Detailed Description
Search for pathogenic chromosomal imbalance through comparative genomic hybridization (aCGH) on DNA microarrays will be done in a group of patients having typical or atypical forms of RTT without known mutations in MECP2, CDKL5 et FOXG1B genes. After imbalance confirmation by qPCR, the pathogenic potential of the segmental aneusomy will be assigned according to the interpretation of aCGH technique-dedicated DECEPHER, BACH and GVD databases. Analysis of parents will allow distinguishing between inherited polymorphic variants and potentially deleterious new imbalances. In case of a new imbalance, a bioinformatics approach will look for candidate genes that will be possibly confirmed by classic mutation screening (sequencing and PCR) in all typical and atypical cases of RTT present in the cohort. The identification of new genes involved in RTT will ameliorate the molecular diagnosis of the disease and genetic counseling for families. This project will allow progression in comprehension of physiopathological mechanisms of cerebral development abnormalities

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Rett Syndrome

7. Study Design

Primary Purpose
Basic Science
Study Phase
Not Applicable
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
Non-Randomized
Enrollment
17 (Actual)

8. Arms, Groups, and Interventions

Arm Title
RTT patient
Arm Type
Experimental
Arm Description
Blood sampling
Arm Title
Parents
Arm Type
Experimental
Arm Description
Blood sampling. To distinguish between inherited polymorphic variants and potentially deleterious new imbalances.
Intervention Type
Procedure
Intervention Name(s)
Blood sampling
Intervention Description
In children: 2 EDTA tubes of 7 ml, 1 Heparin Li tube of 5 ml and 2 PAXgene tubes of 2.5 ml (max 0.8-0.9 ml blood/kg) In parents: 2 EDTA tubes of 7 ml, 1 Heparin Li tube of 5 ml.
Primary Outcome Measure Information:
Title
Analysis of chromosomal imbalances through comparative genomic hybridization on DNA microarrays
Description
Search for pathogenic chromosomal imbalance
Time Frame
up to 12 months

10. Eligibility

Sex
All
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria: Patients: RETT syndrome Patients: Female Parents: parent of a patients
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Christophe PHILIPPE,
Organizational Affiliation
Laboratoire de Génétique Médicale, Rue du Morvan, 54511 Vandoeuvre-Les-Nancy Cédex
Official's Role
Principal Investigator
Facility Information:
Facility Name
Handicaps de l'Enfant - Pavillon Ste Marie, CHU St Jacques
City
Besançon
Country
France
Facility Name
Service de Neuropédiatrie, Hôpital St Jacques, CHU de Besançon
City
Besançon
Country
France
Facility Name
Unité de génétique, Groupe hospitalier Hôpital Flaubert
City
Caen
Country
France
Facility Name
Centre de Génétique Hôpital d'Enfants, CHU de Dijon
City
Dijon
Country
France
Facility Name
Service de neuropédiatrie, CHU Hôpital Gui de Chauliac
City
Montpellier
Country
France
Facility Name
Laboratoire de Génétique chromosomique, CHU Hôpital l'Archet 2
City
Nice
Country
France
Facility Name
Service de génétique médicale, CHU Hôpital Purpan
City
Nice
Country
France
Facility Name
Service de génétique médicale, CHU Hôpital Purpan, CHU de Toulouse
City
Toulouse
Country
France
Facility Name
Laboratoire de Génétique, Hôpitaux de Brabois, CHU de Nancy
City
Vandoeuvre les Nancy
Country
France

12. IPD Sharing Statement

Plan to Share IPD
No

Learn more about this trial

New Genes Involved in Molecular Etiology of Rett Syndrome Through DNA Microarray Comparative Genomic Hybridization

We'll reach out to this number within 24 hrs