Clinical and Genetic Study of 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. Identifier: NCT00494754
Recruitment Status : Unknown
Verified December 2009 by National Taiwan University Hospital.
Recruitment status was:  Recruiting
First Posted : July 2, 2007
Last Update Posted : December 15, 2009
National Science Council, Taiwan
Information provided by:
National Taiwan University Hospital

June 29, 2007
July 2, 2007
December 15, 2009
May 2007
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Complete list of historical versions of study NCT00494754 on Archive Site
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Clinical and Genetic Study of Autism Spectrum Disorder
Clinical and Genetic Study of Autism Spectrum Disorder
The purpose of this study is to prepare instruments for Autism Spectrum Disorder (ASD), to collect clinical, neuropsychological, and genetic data of ASD probands and their family, and to identify the genetic variants close to etiological genes of ASD in a Taiwanese sample

Autism is a pervasive neurodevelopmental disorder with prominent reciprocal social and communication impairment and restricted repetitive behavior or interest. Based on the number of symptoms and functional impairment, autistic disorder, Asperger disorder, and atypical autism (or PDDNOS) are conceptualized as the autism spectrum disorder (ASD). Most recent survey estimated the prevalence of narrow diagnosis of autistic disorder to be around 0.1% to 0.2%, and 0.59 % to 0.63% for ASD, with a four-fold male predominance. Due to high heritability (> 0.9), high family recurrence risk (λ = 60), and severe impairment without effective prevention and treatment available for ASD, this disastrous disease has been prioritized for molecular genetic study from public health perspective. The proposed research is the first systematic approach combining clinical and molecular genetic study of ASD involving multi-sites and three research cores: assessment core (by Gau SS and Wu YY), molecular genetics core (by Chen CH), and data/statistics core (by Gau SS).

The long-term objective of this study is to establish clinical and genetic database of autism and their family for etiology study, exploration of pathogenesis, and developing new treatment. The specific aims are:

  1. to establish the psychometric properties of three Chinese versions of rating scales for ASD: SCQ, SRS, and ABC;
  2. to collect clinical, neuropsychological, and genetic data of ASD probands and their family and
  3. to identify the genetic variants close to etiological genes of ASD in a Taiwanese sample using candidate gene case-control association study design (e.g., Neuroligin gene family, MeCP2 gene, and FOXP2 gene, parent trio and population-based studies) and whole genome linkage analysis for multiplex families.

After well-preparation of instruments, DNA collection procedure, and assessor's training in the first 6 months, we will recruit 40, 170, and 90 ASD families in the first, second, and third year of the project, respectively. The instruments include the ADI-R, ADOS, K-SADS-E, SCQ, SRS, and ABC for measuring autistic psychopathology; WISC-III, MSEL and PPVT for cognitive ability; CPT, CANTAB, and WCST for neuropsychological functioning, and MRI, MRS, and DSI for brain imaging study.

We anticipate the establishment of the database of 300 ASD families, completion of the mutation screening of several candidate genes, and determination of their association with ASD and its intermediate phenotype in our sample. The identification of susceptible genes for ASD would be a major breakthrough in child psychiatry because this revelation would facilitate the scientific diagnosis of autism and as a result, it would shed light on the pathogenesis of autism and contribute to the development of the novel, specific and effective treatment of this devastating disease.

Observational Model: Family-Based
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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.
Non-Probability Sample
The sample will consist of 300 children and adolescents with ASD, aged 3-18.
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Unknown status
Same as current
January 2010
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Inclusion Criteria:

  1. subjects have a clinical diagnosis of autistic disorder, Asperger disorder, or atypical autism defined by the DSM-IV and ICD-10, which was made by a full-time board-certificated child psychiatrist at the first visit and following visits;
  2. their ages range from 3 to 18 when we conduct the study;
  3. subjects have at least one biological parent;
  4. both parents are Han Chinese; and (5) subjects and their biological parents (and siblings if any) consent to participate in this study for complete phenotype assessments and blood withdraw for genetic study

Exclusion Criteria:

  1. if they currently meet criteria or have a history of the following condition as defined by DSM-IV: Schizophrenia, Schizoaffective Disorder, or Organic Psychosis.
  2. if they completely cannot cooperate with blood withdrawal, collection of saliva, or buccal swabs.
Sexes Eligible for Study: All
3 Years to 18 Years   (Child, Adult)
Contact information is only displayed when the study is recruiting subjects
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Susan Shur-Fen Gau, National Taiwan University Hospital
National Taiwan University Hospital
National Science Council, Taiwan
Principal Investigator: Susan Shur-Fen Gau, MD, PhD Dept of Psychiatry, National Taiwan University Hospital
National Taiwan University Hospital
December 2009