Small SNPs, Big Effects: A Review of Single Nucleotide Variations and Polymorphisms in Key Genes Associated With...

Area of Science:

• Neurogenetics
• Developmental Neuroscience

Background:

• Autism spectrum disorder (ASD) is a complex neurodevelopmental condition with a significant genetic basis.
• Genetic variations, including single nucleotide polymorphisms (SNPs) and single nucleotide variants (SNVs), are increasingly recognized as key contributors to ASD etiology.

Purpose of the Study:

• To examine the role of specific genetic alterations, particularly SNPs and SNVs, in the development of ASD.
• To review the impact of mutations in key genes (SHANK3, NRXN1, PTEN, MECP2, CHD8, SCN2A) on neurodevelopmental processes relevant to ASD.

Main Methods:

• Review of recent genome-wide association studies (GWAS) and genetic literature.
• Analysis of the functional impact of identified SNPs and SNVs in genes associated with ASD.
• Focus on six key genes implicated in synaptic function, cell proliferation, chromatin remodeling, and neuronal excitability.

Main Results:

• Several genetic variations, including SNPs and SNVs, have been linked to ASD through GWAS.
• Mutations in genes such as SHANK3, NRXN1, PTEN, MECP2, CHD8, and SCN2A disrupt critical neurodevelopmental pathways.
• These disruptions affect synaptic activity, neurotransmission, cell proliferation, transcriptional regulation, and neuronal excitability, contributing to ASD phenotypes.

Conclusions:

• Understanding the impact of both major and minor genetic variations, including SNPs and SNVs, is essential for a comprehensive view of ASD genetics.
• Further research into these genetic factors is critical for developing targeted treatment strategies for ASD.