Clinical Report: Alterations in Gray Matter Volume Linked to Gene Expression in ADHD
Overview
This study identifies specific gray matter volume (GMV) alterations in adolescents with ADHD and correlates these changes with cell-type-specific gene expression patterns. The findings suggest significant roles for microglia and neuronal types in the neurobiological underpinnings of ADHD.
Background
ADHD is a common neurodevelopmental disorder with a prevalence of approximately 3.4% in children, significantly impacting academic and social functioning. Understanding the structural and molecular mechanisms behind ADHD is crucial for developing effective diagnostic and therapeutic strategies. Neuroimaging studies have shown gray matter volume alterations in ADHD, but the underlying molecular correlates remain poorly understood.
Data Highlights
Region
GMV Change
Bilateral Precuneus
Increased
Left Middle Occipital Gyrus
Decreased
Orbital Part of Right Inferior Frontal Gyrus
Decreased
Key Findings
Increased GMV in the bilateral precuneus in adolescents with ADHD.
Decreased GMV in the left middle occipital gyrus and orbital part of the right inferior frontal gyrus.
Significant correlation between GMV changes and specific gene expression patterns.
Positively correlated genes are enriched in microglia, while negatively correlated genes are associated with excitatory and inhibitory neurons.
Random Forest model achieved an AUC of 0.871 ± 0.029 for distinguishing ADHD from typically developing controls.
Clinical Implications
The findings highlight the potential for integrating neuroimaging and transcriptomic data to enhance understanding of ADHD. This approach may inform future diagnostic criteria and therapeutic strategies targeting specific cellular mechanisms.
Conclusion
This study provides valuable insights into the structural and molecular characteristics of ADHD, paving the way for improved diagnostic and treatment approaches.
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