- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02136849
Inter-regional Project of the Great Western Exploration Approach for Exome Molecular Causes Severe Intellectual Disability Isolated or Syndromic (HUGODIMS)
Study Overview
Status
Conditions
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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-
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Angers, France, 49933
- Angers University Hospital
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Brest, France, 29609
- Brest University Hospital
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Poitiers, France, 86021
- Poitiers university hospital
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Rennes, France, 35203
- Rennes University Hospital
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Tours, France, 37044
- Tours university Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Child
- Adult
- Older Adult
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
We planned to include 50 trios (patients + parents) in the study. This number appears to be sufficient to achieve the defined objectives and according to the literature data (Rauch et al, 2012).
The study population is the population affected by severe intellectual disability according to the commonly accepted definition (IQ <35), and patients with severe or moderate ID (IQ <50) associated with other clinical signs but no obvious syndromic form known . In 2 cases, the parents of patients will not be affected by DI. The recruitment will be made during genetic counseling. Many patients with DI meet the criteria of the study are already being explored in different centers. For these patients, the DNA of the index case and parents is already available. Families will therefore re-contacted to invite them to participate in this study.
Description
Inclusion Criteria:
- Patients with severe intellectual disability (IQ <35 ) or moderate (IQ <50) isolated or syndromic presentation but undiagnosed . The diagnosis is established during genetic counseling of a 6 CHU interregion
- Lack of family history ( parents). We are interested in this project to patients who do not have family history in order to increase the probability of identifying a de novo mutation . We do not however exclude the hypothesis for some patients a mechanism recessive autosomal or X-linked .
- Recruitment in 6 CHU HUGO . Patients are required to have been seen in genetics in a 6 CHU interregion . Molecular analyzes of the Fragile X syndrome and the CGH technique must be negative.
- Indication sequencing exomique adopted by the Scientific Committee. The Scientific Committee HUGODIMS project role to select patients whose DNA will be studied in order to optimize the chances of success for sequencing . This selection must take into account clinical parameters , but also genetic parameters ( potential inbreeding ) . The files will be selected by videoconferencing at the end of the monthly meeting of CLAD . The methodologist of the study will be invited to videoconferencing.
- specific consent obtained for the study.
Exclusion Criteria:
- Parents patient with moderate or severe intellectual disability disagree with the preferred hypothesis of de novo mutation or recessive transmission mechanism.
- Form with known syndromic diagnosis can be targeted molecular studies (clinical signs).
- Cause molecular DI identified by targeted molecular analysis or CGH.
- Explicit refusal to participate in the study of the patient, parents, or one of the two parents.
- Any other indication that intellectual disability.
- The parents of the patient or the patient may be removed.
Study Plan
How is the study designed?
Design Details
- Observational Models: Family-Based
- Time Perspectives: Prospective
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Number of patients for which a mutation responsible for the de novo patients DI has been identified
Time Frame: 18 months
|
18 months
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Number of patients for whom the study of exomes revealed mutations in genes compatible with the mode of recessive autosomal recessive or X-linked chromosome
Time Frame: 18 months
|
18 months
|
Number of de novo mutations (loss of function, missense or indels) probably pathogens identified are not known to be involved in the DI genes.
Time Frame: 18 months
|
18 months
|
Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Stéphane Bézieau, Pr, Nantes University Hospital
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- RC14_0107
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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