SOX7: Autism Associated Gene Identified by Analysis of Multi-Omics Data

Area of Science:

• Genetics and Genomics
• Neuroscience
• Biomarker Discovery

Background:

• Autism spectrum disorder (ASD) has high heritability, but few common genetic variants are reliably associated with diagnosis.
• Most identified ASD-associated mutations are non-coding, making it difficult to determine functional and causal variants.
• Lack of reliable biomarkers for ASD diagnosis and molecular mechanisms for severity assessment necessitates integrated genetic and transcriptomic approaches.

Purpose of the Study:

• To integrate genome-wide association studies (GWAS) and RNA sequencing (RNA-seq) data to identify potential causal genes for ASD.
• To investigate differential gene expression between ASD cases and controls.
• To identify potential genetic biomarkers for ASD diagnosis and therapeutic strategies.

Main Methods:

• Performed gene-based association studies using GWAS summary statistics from two large ASD cohorts (discovery and replication data).
• Investigated differential gene expression between ASD cases and controls using two independent RNA-seq datasets.
• Utilized adaptive tests and Benjamini-Hochberg correction for statistical significance.

Main Results:

• Identified five genes significantly associated with ASD in the discovery GWAS data: KIZ-AS1, KIZ, XRN2, SOX7, and LOC101929229 (PINX1-DT).
• Replicated association for SOX7 and LOC101929229 in the replication GWAS data; KIZ-AS1 and KIZ showed near-replication.
• SOX7 demonstrated significant differential expression between ASD cases and controls in both RNA-seq datasets, being upregulated in cases.

Conclusions:

• The gene SOX7, encoding a transcription factor involved in cell fate determination, is significantly associated with ASD.
• SOX7's differential expression in ASD patients suggests its potential role in ASD pathogenesis.
• SOX7 represents a promising candidate gene for developing novel diagnostic biomarkers and therapeutic strategies for ASD.