Fecal Microbial and Metabolomic Change during treatment course for depression: An Observational Study

Area of Science:

• Microbiome research
• Metabolomics
• Neuroscience

Background:

• Growing evidence links gut microbiota alterations and metabolites to depressive disorders.
• These changes suggest a potential role in the pathophysiology of depression.

Purpose of the Study:

• Investigate the relationship between microbial and metabolomic features and depression treatment course.
• Examine these relationships in a real-world clinical setting.

Main Methods:

• Recruited patients diagnosed with depressive disorders.
• Collected stool samples at three time points during treatment.
• Analyzed gut microbiomes using 16S rRNA gene sequencing and gut metabolomes via mass spectrometry.

Main Results:

• Non-responders exhibited lower alpha diversity (Phylogenic Diversity index) than responders (p=0.003).
• Non-responders showed increased estimated microbial glutamate synthesis compared to responders and stable remitters (p=0.035).
• No specific microbiota or metabolome differentiated the three groups cross-sectionally or longitudinally.

Conclusions:

• Microbial features and longitudinal transitions differ based on depression treatment course.
• Further controlled and animal studies are needed to establish causality between microbiota and depression.