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Related Experiment Videos

Autism and tuberous sclerosis

S L Smalley1

  • 1Department of Psychiatry, University of California-Los Angeles-School of Medicine 90024, USA.

Journal of Autism and Developmental Disorders
|November 14, 1998
PubMed
Summary

Tuberous Sclerosis Complex (TSC) is frequently associated with autism spectrum disorder (ASD) and pervasive developmental disorders (PDD). Genetic factors related to TSC may directly impact brain development, contributing to autism in affected individuals.

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Pediatrics

Background:

  • Autism spectrum disorder (ASD) and pervasive developmental disorders (PDD) are common in individuals with Tuberous Sclerosis Complex (TSC).
  • Approximately 25% of TSC cases exhibit autism, with 40-45% meeting criteria for ASD or PDD.
  • Conversely, TSC is found in 1-4% of autistic individuals, potentially reaching 8-14% in those with seizure disorders.

Purpose of the Study:

  • To explore the association between Tuberous Sclerosis Complex (TSC) and autism spectrum disorder (ASD).
  • To investigate potential mechanisms underlying the co-occurrence of TSC and ASD.
  • To identify risk factors for autism development in TSC patients.

Main Methods:

  • Review of clinical features in TSC patients.
  • Analysis of neuroimaging investigations.
  • Examination of the relationship between seizures, mental retardation, and autism in TSC.

Main Results:

  • Mental retardation and seizures, especially infantile spasms, are risk factors for autism/PDD in TSC.
  • However, these factors are neither sufficient nor necessary for autism development in TSC.
  • Clinical and neuroimaging data suggest a direct influence of the abnormal TSC gene on autism development.

Conclusions:

  • The underlying mechanism of autism in TSC is not fully understood.
  • Abnormal TSC gene function may directly impact neural development in critical brain regions, leading to autism.
  • Autism/PDD in TSC may result from TSC gene mutations affecting neural development during critical stages.

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