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Autism in Angelman syndrome: implications for autism research.
S U Peters1, A L Beaudet, N Madduri
1Department of Pediatrics, Division of Developmental Pediatrics, Baylor College of Medicine & Texas Children's Hospital, Houston, TX 77030, USA. sarikap@bcm.tmc.edu
Clinical Genetics
|November 4, 2004
Summary
Angelman syndrome (AS) is a neurodevelopmental disorder. This study found 42% of children with AS met autism criteria, suggesting UBE3A gene dysregulation may contribute to autism causation.
Area of Science:
- Neuroscience
- Genetics
- Developmental Pediatrics
Background:
- Angelman syndrome (AS) is a rare neurodevelopmental disorder.
- AS is characterized by intellectual disability, motor difficulties, and distinct behavioral features.
- Genetic defects in the AS critical region, particularly involving the UBE3A gene, are implicated.
Purpose of the Study:
- To investigate the prevalence of autism spectrum disorder (ASD) in children with Angelman syndrome.
- To explore the phenotypic overlap between AS and ASD.
- To examine the potential role of UBE3A gene dysregulation in autism.
Main Methods:
- Study population: 19 children with genetically confirmed AS across three molecular classes.
- Diagnostic tools: Autism Diagnostic Observation Schedule (ADOS) and Autism Diagnostic Interview-Revised (ADI-R).
- Longitudinal assessment over 1 year, including measures of language, cognition, and adaptive behavior.
Main Results:
- 42% (8 of 19) of children with AS met diagnostic criteria for autism.
- Children with comorbid AS and autism showed lower scores in language, adaptive behavior, and cognition.
- These children exhibited slower developmental progress and communication/socialization deficits similar to idiopathic autism.
Conclusions:
- There is significant phenotypic overlap between Angelman syndrome and autism spectrum disorder.
- The findings support the hypothesis that UBE3A gene dysregulation may contribute to the causation of autism.
- AS provides a valuable model for understanding autism pathogenesis.
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