Gut Microbiome Composition and Its Association with Sleep in Major Psychiatric Disorders

Area of Science:

• Microbiome Research
• Psychiatric Disorders
• Sleep Science

Background:

• Sleep disturbances are common in psychiatric disorders, potentially linked to HPA axis, neuroimmune, and circadian rhythm alterations.
• The gut microbiome is increasingly recognized for its role in sleep regulation, with interventions like probiotics showing promise.

Purpose of the Study:

• To investigate the relationship between gut microbiota composition, psychiatric disorders, and sleep quality.
• To compare gut microbiome diversity and specific bacterial taxa between psychiatric patients and healthy controls.

Main Methods:

• Cross-sectional study of 103 participants (63 psychiatric patients, 40 controls).
• Assessment of sleep quality using the Pittsburgh Sleep Quality Index (PSQI).
• Fecal microbiome analysis via 16S rRNA sequencing, comparing diversity metrics and differentially abundant species/genera.

Main Results:

• Psychiatric patients exhibited reduced alpha diversity and altered beta diversity compared to controls.
• No significant correlation found between diversity metrics and PSQI scores in either group.
• Specific bacterial species (e.g., Ellagibacter isourolithinifaciens) and genera (e.g., Senegalimassilia) were differentially abundant in psychiatric patients with good vs. poor sleep quality.

Conclusions:

• The study highlights a complex interplay between the gut microbiome and sleep disturbances in psychiatric populations.
• Specific microbial signatures may be associated with varying sleep quality within psychiatric disorders.