Changes in gut bacteria linked to major depression with suicidal thoughts

Fecal samples from 141 participants revealed that Bacteroides cellulosilyticus may negatively regulate suicidal ideation in patients with major depressive disorder.

• No significant differences in overall microbial diversity were found between healthy individuals and patients with major depressive disorder.
• Patients with suicidal ideation showed reduced microbial capacities related to peptidoglycan biosynthesis compared to those without suicidal ideation.
• Mediation analysis suggested that certain microbial taxa could influence suicidal ideation through pathways involved in carbohydrate transport and metabolism.
• The potential protective role of Bacteroides cellulosilyticus in enhancing carbohydrate metabolism and short-chain fatty acid production was highlighted.
• These findings suggest new microbiome-based insights into the relationship between gut bacteria and suicidal ideation in major depressive disorder.

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