Transcriptomic Profiling of the Amygdala of Children With Autism Spectrum Disorder

Area of Science:

• Neuroscience
• Genomics
• Developmental Biology

Background:

• The amygdala plays a crucial role in Autism Spectrum Disorder (ASD) affecting emotional processing, social learning, and anxiety.
• Altered amygdala development is observed in children with ASD, linked to social impairments and anxiety.
• Limited data exists on the molecular pathology of the amygdala in pediatric ASD.

Purpose of the Study:

• To investigate the molecular pathology of the amygdala in male children with ASD using RNA sequencing.
• To identify potential therapeutic targets for early intervention by analyzing gene expression profiles and conducting drug repurposing analysis.

Main Methods:

• Performed RNAseq profiling on postmortem amygdala samples from male children aged 4-14 years with ASD (n=8) and neurotypical controls (n=6).
• Conducted drug repurposing analysis to identify compounds predicted to reverse observed transcriptomic signatures.
• Utilized targeted pathway analysis on top differentially expressed genes.

Main Results:

• Full transcriptome analysis implicated pathways in neuroimmune signaling, metabolism, matrix metalloproteases, neurodevelopment, estrogen signaling, and synaptic signaling.
• Targeted analysis highlighted alterations in extracellular matrix organization (ECM), immune signaling, and synaptic signaling.
• Drug repurposing identified sleep-modifying compounds, anti-inflammatory agents (COX2, GSK3 inhibitors), and PDGF receptor tyrosine kinase inhibitors as potential therapeutics.

Conclusions:

• Significant alterations in immune signaling, ECM, and synaptic signaling pathways were identified in the amygdala of children with ASD.
• The study highlights potential therapeutic drug targets for developing early intervention strategies for ASD.
• Findings provide molecular insights into amygdala dysfunction in pediatric ASD.