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Gut microbiota and postpartum depression: a Mendelian randomization study
Jianjun Zhang1,2, Lechuan Wei3, Hongfei Tan3
1Department of Obstetrics, Affiliated Hospital of Weifang Medical University, Weifang, China.
Background:
Increasing evidence suggests a correlation between intestinal microbiota and the gut-brain axis; however, the causal relationship between gut microbiota and postpartum depression (PPD) remains unclear.
Methods:
In this study, a two-sample Mendelian randomization (MR) design was employed to analyze the GWAS data of gut microorganisms from the Mibiogen database and PPD data from the UK biobank. Various statistical methods, including inverse variance weighted, MR-Egger, weighted median, weighted model, and MR-PRESSO, were utilized to investigate the causal relationship between gut microbiota and PPD. Additionally, sensitivity analysis was conducted to assess the robustness of the findings.
Results:
Through MR analysis, it was found that phylum Actinobacteria (P=0.014, OR=0.971, 95% CI=0.948-0.994) and genus Holdemanella (P=0.023, OR=0.979, 95% CI=0.961-0.997) have protective effects on PPD, while the other two unknown genera, genus Unknown Ids 2001 (P=0.025, OR=0.972,95% CI=0.947-0.996), and genus Unknown Ids 2755 (P=0.012, OR=0.977, 95% CI=0.959-0.995) also has a protective effect on PPD. The sensitivity analysis results indicate that there is no heterogeneity or horizontal pleiotropy.
Conclusion:
This study has identified a causal association between Actinomycetota, Holdemanella, and PDD through MR analysis. These findings offer significant contributions to the development of personalized treatment approaches for PPD, encompassing interventions such as dietary modifications or microbiome interventions.
Insights
Gut bacteria like Actinobacteria and Holdemanella may protect against postpartum depression (PPD). This Mendelian randomization study suggests a causal link, paving the way for new PPD treatments.
Area of Science:
- Microbiome research
- Gut-brain axis studies
- Mental health research
Background:
- The gut-brain axis links intestinal microbiota to neurological function.
- A clear causal relationship between gut microbiota and postpartum depression (PPD) is not yet established.
- Understanding this connection is crucial for developing novel PPD therapeutic strategies.
Purpose of the Study:
- To investigate the potential causal relationship between specific gut microorganisms and postpartum depression (PPD).
- To utilize Mendelian randomization (MR) to analyze genetic associations between gut microbiota and PPD.
- To identify specific bacterial taxa that may influence PPD risk.
Main Methods:
- Employed a two-sample Mendelian randomization (MR) design.
- Analyzed genome-wide association study (GWAS) data for gut microorganisms (Mibiogen) and PPD (UK Biobank).
- Utilized multiple statistical methods (IVW, MR-Egger, weighted median, etc.) and sensitivity analyses to ensure result robustness.
Main Results:
- Phylum Actinobacteria and genus Holdemanella showed a protective effect against PPD (P<0.05).
- Two unidentified genera (Unknown Ids 2001 and 2755) also demonstrated a protective association with PPD (P<0.05).
- Sensitivity analyses confirmed no significant heterogeneity or horizontal pleiotropy, supporting the causal findings.
Conclusions:
- Established a potential causal association between Actinomycetota, Holdemanella, and PPD.
- Findings suggest that specific gut bacteria may play a protective role in PPD.
- Results support the development of personalized PPD treatments, including dietary and microbiome interventions.
