Attention Deficit Hyperactivity Disorder (ADHD) and the gut microbiome: An ecological perspective

Area of Science:

• Microbiology
• Neuroscience
• Genetics

Background:

• Attention Deficit Hyperactivity Disorder (ADHD) is a prevalent neuropsychiatric disorder.
• Emerging evidence suggests the gut microbiome plays a role in ADHD pathophysiology.
• Previous studies focused on microbial abundance, overlooking complex ecological interactions.

Purpose of the Study:

• To investigate microbial co-occurrence networks and ecological relationships in ADHD.
• To move beyond simple abundance metrics and explore taxa interactions in the ADHD gut microbiome.
• To identify key microbial taxa and clusters vital to gut ecology in ADHD.

Main Methods:

• Analysis of a publicly available 16S rRNA gene dataset (v3-4 region) from undergraduate students.
• Comparison of macroscale metrics (diversity, differential abundance) between ADHD and Control groups.
• Construction and analysis of Microbial Co-occurrence Networks (MCNs) using SparCC correlations.
• Application of community detection and centrality calculations to identify microbial clusters and key taxa.

Main Results:

• Initial macroscale analyses showed trends consistent with existing ADHD gut microbiome literature.
• Microbial Co-occurrence Networks revealed distinct ecological structures between ADHD and Control groups.
• Community detection identified specific clusters of cooperating taxa, with varying importance in each group.

Conclusions:

• Gut microbiome ecology, beyond simple abundance, offers new insights into ADHD.
• Identifying key microbial taxa and their interactions can guide future mechanistic studies and therapeutic strategies.
• This study provides a foundation for understanding the complex gut-brain axis in ADHD.