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Study of the Involvement of 15q11 - q13 Chromosome Region and CYFIP1 Gene in Autism. Attempt a Genotype-phenotype Correlation

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02862340
Recruitment Status : Completed
First Posted : August 11, 2016
Last Update Posted : August 11, 2016
Information provided by (Responsible Party):
Centre Hospitalier Universitaire de Nice

Brief Summary:

Autism, ranked among the '' pervasive developmental disorders' (ASD), is characterized by disturbances in the areas of reciprocal social interaction, communication and behavior, interests and activities restricted, repetitive. Various studies indicate that autistic disorder is subjected to a genetic predisposition, most likely polygenic and heterogeneous. However, no major gene responsible for this disorder has yet been identified. Given the link between the Fragile X syndrome (the most common form of mental retardation (MR) hereditary) and autistic behavior, it seems interesting to look, also, a possible link to the molecular level. Among the proteins interacting with FMRP (absent protein in fragile X patients), the investigators were interested to CYFIP1, protein encoded by the gene CYFIP1 appears to be a good candidate gene involved in the RM and autism by its chromosomal position and function. As FMR1, CYFIP1 is expressed in the brain cortex, hippocampus and Purkinje cells of the cerebellum. This protein co-localizes and interacts with Rac and FMRP, which are both involved in neurogenesis and cognitive development. In humans, the gene encoding CYFIP1 is located in the 15q11-q13. Now, the only autosomal abnormalities most frequently observed in autism are those involving the proximal 15q region, including duplications or 15q11-q13 triplications interstitial, of maternal origin.

These data suggest that an / or more autism genes responsible are probably present in the 15q11-q13 chromosomal region, although no gene has yet been identified. Thus, the study of the role of CYFIP1 gene in patients with autism spectrum disorders would most likely contributory.

The investigators wish to study the involvement of the 15q11-q13 chromosomal region and CYFIP1 gene in autistic disorder in a hundred patients from the Autism Resource Centre (ARC) Nice PACA antenna, over a two year period.

The diagnosis and assessment report of children likely to be included in this study will be conducted at ARC Nice. Balance sheets are made according to the recommendations of the High Authority of Health for diagnosis of infantile autism and PDD. These children are then sent to the Genetic Consultation Nice Hospital where an analysis of the background and a specific morphological examination will be realized..

Condition or disease Intervention/treatment Phase
Autistic Disorder Genetic: Genetic test Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 60 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Study of the Involvement of 15q11 - q13 Chromosome Region and CYFIP1 Gene in Autism. Attempt a Genotype-phenotype Correlation
Study Start Date : January 2008
Actual Primary Completion Date : January 2008
Actual Study Completion Date : February 2012

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Autistic disorder
Children over 4 years with an autistic disorder of unknown etiology with the techniques currently available and accessible in routine diagnostics.
Genetic: Genetic test

Primary Outcome Measures :
  1. presence or absence of abnormality in 15q11q13 gene [ Time Frame: At the inclusion ]
    Testing a candidate gene in a chromosomal region known to be involved in autism

Secondary Outcome Measures :
  1. phenotype [ Time Frame: At the inclusion ]
    Syndromic or specific behavioral phenotypes corresponding to the identified molecular abnormalities

Information from the National Library of Medicine

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Ages Eligible for Study:   4 Years to 18 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subject unadopted 4 to 18 years
  • Subject completing the autism spectrum disorder criteria development by diagnostic grid ICD10 recognized by the international community child psychiatry. The ADI-R test is always associated.
  • Subject has at least one of the following abnormalities:

Mental retardation, Anomaly morphological examination (abnormal weight and height growth and / or head circumference, abnormal ends, dysmorphic ...) Malformation (s) visceral (s) Behavioural disorders other than autistic disorder (aggression, sleep disorders ...) Abnormal neurological examination and brain imaging, Family history of autism and / or mental retardation.

- Parents of the subject and topics affiliated to a social security scheme

Exclusion Criteria:

  • Etiologie de la pathologie autistique connue (Syndrome de Rett, Xfra…)
  • Absence de consentement éclairé des patients et des représentants de l'autorité parentale
  • Parents sous tutelle ou curatelle

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02862340

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CHU de Nice
Nice, France
Sponsors and Collaborators
Centre Hospitalier Universitaire de Nice

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Responsible Party: Centre Hospitalier Universitaire de Nice Identifier: NCT02862340     History of Changes
Other Study ID Numbers: 07-PP-01
First Posted: August 11, 2016    Key Record Dates
Last Update Posted: August 11, 2016
Last Verified: August 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Additional relevant MeSH terms:
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Autistic Disorder
Autism Spectrum Disorder
Child Development Disorders, Pervasive
Neurodevelopmental Disorders
Mental Disorders