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A Family Study of Copy Number Variations in Patients With Autism Spectrum Disorder

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.
 
ClinicalTrials.gov Identifier: NCT02228876
Recruitment Status : Unknown
Verified August 2014 by National Taiwan University Hospital.
Recruitment status was:  Active, not recruiting
First Posted : August 29, 2014
Last Update Posted : August 29, 2014
Sponsor:
Information provided by (Responsible Party):
National Taiwan University Hospital

Brief Summary:
This 3-year proposal is a family-based cohort study to establish a representative sample of probands with ASD and their parents with well-characterized environmental, clinical phenotypes, endophenotypes, and genetic data to conduct CNV experiments and the genotype-phenotype correlations. Based on our previous findings, probands with CNVs larger than 500kb has been identified and their families will be newly recruit in the present project to reveal the origin of the CNVs and reveal the clinical feature of the families. The significant findings in specific genes will conduct pathway analysis to reveal the etiology in ASD, providing further understanding in the disease.

Condition or disease
Autism Spectrum Disorder

Detailed Description:

Due to its high prevalence, long-term impairment, high genetic component (heritability > 90%), and lack of effective prevention and treatment, ASD has been prioritized for genetic studies. However, despite extensive genetic research, there has been no any conclusive result mainly due to the clinical and genetic heterogeneity of ASD. Given the progress of CNV study in ASD, several challenges remain to be faced with, such as differences in phenotypic definition across different studies; a lack of population norms for CNVs, and a lack of consensus in methods for CNV detection and analysis. In the present study, the large segments of CNV found in ASD probands will be compared with standardized controls from National Center for Genome Medicine (NCGM), Academia Sinica to identify the possible CNVs. The other important issue of CNV research in ASD is to investigate whether the origin of CNVs are inherited or de novo. By collecting the complete background and revealing the CNVs of the parents and siblings, the origin of the CNVs will be uncovered in the present project. The candidate genes from important CNVs will be identified by pathway analysis. Gene expression will be conducted to confirm the pathogenic genes. Notably the present study will help bridge the gap to translate the bench findings to bedside to help early detection of ASD and pave the way developing effective treatment for ASD in the future.

Specific Aims:

With the above-mentioned rationale of this project and limited research budget from NSC, the ultimate goal of this project is to identify the important CNVs to reveal the pathogenic genes for ASD for future translational research in ASD and to prospectively characterize clinical features of ASD individuals with CNV.

The specific aims of this study are as follows,

  1. To identify important and pathogenic CNVs by comparing the CNVs and CNPs of the controls provided by NCGM , Academia Sinica;
  2. To assess parents and siblings of ASD patients who were found to have ~500 kb CNVs in our previous study using clinical, psychopathological, and social measures for family study and also to conduct CNV analysis in the families to determine the origin of the CNVs;
  3. To conduct a follow-up assessments of clinical features, and social and neuropsychological functions of ASD probands with CNV to examine the phenotype changes over time;
  4. To study the clinical phenotypes between de novo and inherited groups to reveal the pathogenic CNVs;
  5. To conduct pathway analysis of genes involved in the CNVs, and to confirm the pathogenic genes by conducting gene expression analysis;
  6. To investigate the associations of clinical phenotypes such as autistic tendency, and social impairments between (1) probands with/without CNVs/controls, and (2) probands/unaffected siblings/controls.

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Study Type : Observational
Estimated Enrollment : 360 participants
Official Title: A Family Study of Copy Number Variations in Patients With Autism Spectrum Disorder
Study Start Date : August 2014
Estimated Primary Completion Date : July 2017
Estimated Study Completion Date : July 2017

Resource links provided by the National Library of Medicine





Primary Outcome Measures :
  1. Diagnosis of autism [ Time Frame: 1 day ]
    Using the Autism Diagnostic Interview-Revised (ADI-R) to assess the developmental and behavioral aspects of autism, including reciprocal social interaction, communication, and repetitive behaviors and stereotyped patterns


Secondary Outcome Measures :
  1. Diagnosis of psychiatric disorders [ Time Frame: 1 day ]
    Using the Schedule for Affective Disorders & Schizophrenia (K-SADS-E) to assess the DSM-IV diagnosis of ADHD and other psychiatric disorders


Biospecimen Retention:   Samples With DNA
The subjects will receive blood withdrawal. The blood sample will be used for establishing lymphoblastoid cell lines, which will be used for molecular genetic experiments.


Information from the National Library of Medicine

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Ages Eligible for Study:   3 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Based on our preliminary CNV results of 339 probands, approximately 120 probands had been identified to have CNVs larger than 500kb. In the present project, the parents and siblings of the probands with CNVs larger than 500kb will be recruited (estimated sample size, parents = 200, siblings = 40) and reassess the ~120 probands.
Criteria

Inclusion Criteria:

  1. subjects have a clinical diagnosis of autistic disorder or Asperger disorder defined by the DSM-IV and ICD-10 criteria and ASD defined by the DSM-5, which was made by board-certificated child psychiatrists at the first visit and following visits;
  2. their ages range from 3 to 30;
  3. subjects have at least one biological parent;
  4. both parents are Han Chinese; and
  5. subjects and their biological parents consent to participate in this study for complete phenotype assessments and blood withdraw for genetic study.

Exclusion Criteria:

  • if they currently meet criteria or have a history of the following condition as defined by DSM-IV: Schizophrenia, Schizoaffective Disorder, or Organic Psychosis.

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 ClinicalTrials.gov identifier (NCT number): NCT02228876


Locations
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Taiwan
National Taiwan Univeristy Hospital
Taipei, Taiwan
Sponsors and Collaborators
National Taiwan University Hospital
Investigators
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Principal Investigator: Susan Shur-Fen Gau, MD, PhD National Taiwan University Hospital & College of Medicine

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Responsible Party: National Taiwan University Hospital
ClinicalTrials.gov Identifier: NCT02228876    
Other Study ID Numbers: 201403019RINA
First Posted: August 29, 2014    Key Record Dates
Last Update Posted: August 29, 2014
Last Verified: August 2014
Additional relevant MeSH terms:
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Autistic Disorder
Autism Spectrum Disorder
Child Development Disorders, Pervasive
Neurodevelopmental Disorders
Mental Disorders