"Different mutations affected the same brain cell types and molecular processes, especially during early development."
Study Links Diverse Autism Mutations to Shared Developmental Pathways
A study published in Nature by researchers led by Gaia Novarino at the Institute of Science and Technology Austria (ISTA) investigated whether different autism-associated genetic mutations share common biological pathways. The team used single-nucleus multi-omics sequencing to analyze over 250 samples from mice with high-risk ASD gene mutations, across two brain regions, both sexes, and multiple developmental stages.
Key Findings
- Shared Pathways, Unique Signatures: Different mutations affected the same brain cell types and molecular processes, especially during early development, showing transient delays in cell maturation and connectivity rather than permanent defects. However, each mutation also retained a unique molecular signature.
- Sex-Specific Responses: Changes in brain activity mirrored molecular processes, and female mice showed different responses than males.
Implications
The findings suggest ASD-linked mutations converge on common developmental pathways, which could become targets for stage-specific, sex-specific, and trajectory-specific early interventions.
The research was conducted on mice; animal procedures were approved by Austrian authorities.