Autism spectrum disorder genetics; a comprehensive review

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by social interaction deficits, communication difficulties, and repetitive behaviors.
• ASD prevalence has increased, affecting approximately 1 in 44 children in the US, with a higher incidence in males.
• Genetic factors contribute substantially (40-80%) to ASD risk, interacting with environmental influences like parental age and birth complications.

Purpose of the Study:

• To explore the role of specific genes in synapse formation relevant to ASD.
• To investigate the impact of environmental factors, such as valproic acid exposure and immunological perturbation, on ASD development.

Main Methods:

• Review of genetic studies linking gene variations to ASD risk.
• Analysis of the function of genes involved in neuronal development and synaptogenesis.
• Examination of environmental risk factors and their influence on neurodevelopment in ASD.

Main Results:

• Key genes associated with ASD influence neuronal proliferation, growth, organization, and synaptogenesis.
• Specific gene variants affect neuron production and synaptic development.
• Environmental factors like valproic acid and immune challenges are implicated in ASD pathogenesis.

Conclusions:

• Genetic factors play a critical role in ASD by affecting brain development and synaptic processes.
• Environmental influences interact with genetic predispositions to modulate ASD risk.
• Understanding these genetic and environmental interactions is crucial for comprehending ASD etiology.