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Transcriptomic analysis in autism spectrum disorder suggests three molecular subtypes with distinct phenotypic
Tao Pang1, Xiangyu Zheng1, Jia-Jia Liu2
1Peking University Sixth Hospital, Peking University Institute of Mental Health, NHC Key Laboratory of Mental Health (Peking University), National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital), Beijing, China.
Communications Biology
|April 27, 2026
Summary
Researchers identified three distinct molecular subtypes of autism spectrum disorder (ASD) using gene expression data. These subtypes show different symptoms and biological underpinnings, paving the way for personalized autism treatments.
Area of Science:
- Genetics
- Neuroscience
- Bioinformatics
Background:
- Autism spectrum disorder (ASD) is a complex neurodevelopmental condition characterized by significant heterogeneity.
- Understanding the molecular basis of ASD heterogeneity is crucial for developing effective interventions.
Purpose of the Study:
- To perform molecular subtyping of ASD using gene expression data to identify distinct biological subtypes.
- To characterize these subtypes based on clinical phenotypes, gene expression patterns, and cellular characteristics.
Main Methods:
- Utilized unsupervised non-negative matrix factorization (NMF) on RNA-seq data from 1711 ASD samples.
- Characterized identified subtypes by overall symptoms, social-communication deficits, restricted-repetitive behaviors, cognitive function, and behavioral problems.
- Analyzed subtype-specific differentially expressed genes, functional pathways, and spatiotemporal/cell-type expression patterns.
Main Results:
- Identified three reproducible ASD molecular subtypes (Clusters 1, 2, and 3) in independent datasets.
- Cluster 1 exhibited severe restricted/repetitive behaviors; Cluster 3 showed social communication impairments; Cluster 2 presented milder symptoms and better cognition.
- Differential gene expression linked Cluster 1 and 3 to nervous system dysfunction and morphogenesis, while Cluster 2 was associated with immune system processes.
Conclusions:
- Molecular subtyping reveals biologically and clinically distinct ASD subtypes, offering insights into underlying atypical mechanisms.
- These findings aid in understanding ASD heterogeneity and support the development of personalized therapeutic strategies for specific ASD subtypes.
