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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging

Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging

Published on: September 12, 2011

Integrative multi-omics implicates a CTSB/ITIH-ECM axis in autism spectrum disorder.

Guoqi Wang¹, Gang Zhu², Liu Hongyan³

¹Senior Department of Pediatrics, Chinese PLA General Hospital, Beijing 100007, China.

Neurobiology of Disease

|April 22, 2026

Summary

Autism spectrum disorder (ASD) risk is linked to extracellular matrix (ECM) disruption. This study identifies key proteins and pathways, offering a genetic framework for understanding ASD neurodevelopmental vulnerability.

Keywords:

Autism spectrum disorder Mendelian randomization Molecular docking Single-nucleus RNA sequencing Therapeutic target

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Area of Science:

Neuroscience
Genetics
Biochemistry

Background:

Autism spectrum disorder (ASD) is a highly heritable neurodevelopmental condition with significant clinical and biological heterogeneity.
Understanding the biological mechanisms linking genetic risk to ASD pathology remains a challenge.

Purpose of the Study:

To identify proteins and biological pathways causally associated with ASD risk.
To investigate cell-type-specific gene expression patterns in ASD.
To assess the drugability of identified targets.

Main Methods:

Integrative Mendelian randomization (MR) analysis combining proteomic, transcriptomic, metabolomic, and snRNA-seq data.
Proteome-wide MR across multiple tissues to identify causal proteins.
Bayesian colocalization, snRNA-seq, functional enrichment, and drug docking for target prioritization and validation.

Main Results:

Identified 42 proteins with putative causal effects on ASD risk, prioritizing eight high-confidence targets (e.g., ITIH3, ITIH4, CTSB).
Demonstrated cell-type-specific dysregulation of these genes in ASD cortex, implicating extracellular matrix (ECM) homeostasis disruption.
Highlighted sphingolipid metabolism and proteolytic balance as key mediators, with seocalcitol identified as a potential CTSB inhibitor.

Conclusions:

Prioritized a genetically supported ECM-related biological axis underlying ASD risk.
Suggests that dysregulation of proteolytic balance contributes to neurodevelopmental vulnerability in ASD.
Provides a human genetics-informed framework for understanding ECM involvement in ASD pathophysiology.