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Published on: September 6, 2024
Genetics of autism spectrum disorders
1Program in Neurogenetics, Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA. dhg@mednet.ucla.edu
Trends in Cognitive Sciences
|August 23, 2011
Summary
Autism spectrum disorder (ASD) is a neurodevelopmental syndrome with genetic links. Identifying ASD susceptibility genes reveals insights into its pathophysiology and shared features with other neurodevelopmental disorders.
Area of Science:
- Neurodevelopmental disorders
- Genetics and genomics
- Cognitive neuroscience
Background:
- Autism spectrum disorder (ASD) is a neurodevelopmental syndrome characterized by impairments in language, social cognition, and mental flexibility.
- While etiologically heterogeneous, recent genetic discoveries have identified dozens of ASD susceptibility genes, accounting for 10-20% of cases.
Purpose of the Study:
- To explore the genetic underpinnings of autism spectrum disorder (ASD).
- To investigate the role of identified susceptibility genes in ASD pathophysiology.
- To understand the shared neurobiological and cognitive features across neurodevelopmental disorders.
Main Methods:
- Utilized diverse genetic and genomic approaches.
- Analyzed identified ASD susceptibility genes.
- Examined biological pathways implicated in ASD and related disorders.
Main Results:
- Several dozen ASD susceptibility genes have been identified, highlighting the disorder's etiological heterogeneity.
- Evidence converges on the disruption of key biological pathways.
- These pathways are also implicated in other allied neurodevelopmental disorders.
Conclusions:
- Genetic findings provide crucial tools for understanding ASD pathophysiology.
- Gene identification aids in probing the specificity of ASD and shared features across neurodevelopmental disorders.
- The research aims to link genetic factors to brain circuits and cognitive function.
Related Concept Videos
01:19Autism Spectrum Disorder
Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
01:28Human Genetics
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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01:23Behavioral Genetics and Its Designs
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
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01:43Incomplete Dominance
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
01:35Pedigree Analysis
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01:11Genome-wide Association Studies-GWAS
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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