Gut microbiome and schizophrenia: insights from two-sample Mendelian randomization.

Area of Science:

• Psychiatry
• Microbiology
• Genetics

Background:

• Emerging evidence suggests a connection between the gut microbiome and schizophrenia.
• The causal nature of this relationship remains largely undetermined.

Purpose of the Study:

• To investigate bidirectional causal relationships between the gut microbiome and schizophrenia.
• To explore potential therapeutic targets within the gut microbiome for schizophrenia treatment.

Main Methods:

• Utilized two-sample bidirectional Mendelian randomization.
• Employed summary genome-wide association study (GWAS) datasets for gut microbiome (n=18,340) and schizophrenia (n=130,644).
• Conducted sensitive analyses to ensure the robustness of results.

Main Results:

• Identified nine bacterial taxa with positive causal effects on schizophrenia (OR: 1.08-1.16).
• Identified six bacterial taxa with negative causal effects on schizophrenia (OR: 0.88-0.94).
• Reverse Mendelian randomization indicated schizophrenia influences the abundance of specific gut taxa.

Conclusions:

• Established mutual causal relationships between the gut microbiome and schizophrenia.
• Findings support the gut microbiome as a potential therapeutic avenue for schizophrenia.
• Highlights the complex interplay between gut bacteria and mental health.