Autism spectrum disorder: insights into convergent mechanisms from transcriptomics

Area of Science:

• Neurogenetics
• Molecular Psychiatry
• Developmental Neuroscience

Background:

• Autism spectrum disorder (ASD) has a strong genetic component, but causal variants are identified in only a minority of cases.
• The genetic heterogeneity of ASD necessitates identifying convergent molecular pathways.
• Understanding these pathways is crucial for developing effective interventions.

Purpose of the Study:

• To review how transcriptomic analyses have advanced the understanding of pathway convergence in ASD.
• To highlight the role of distinct transcriptomic signatures in autistic brains.
• To explore the impact of altered neuronal activity on gene expression and splicing in ASD.

Main Methods:

• Review of recent transcriptomic analyses, including deep RNA sequencing.
• Downstream investigations of identified transcriptomic signatures.
• Analysis of pre-mRNA alternative splicing patterns.

Main Results:

• Transcriptomic analyses have revealed distinct molecular signatures in a significant proportion of autistic brains.
• These signatures are linked to altered neuronal activity.
• A notable impact on pre-mRNA alternative splicing patterns was observed.

Conclusions:

• Transcriptomic data provides critical insights into the molecular mechanisms underlying ASD.
• Pathway convergence, particularly through altered splicing, is a key feature in a subset of ASD cases.
• Further research into these transcriptomic signatures may identify novel therapeutic targets.