Causal relationship between gut microbiota and chronic renal failure: a two-sample Mendelian randomization study

Area of Science:

• Genetics
• Microbiology
• Nephrology

Background:

• Observational studies suggest a link between gut microbiota and chronic kidney disease (CKD).
• The causal relationship between gut microbiota and CKD remains unclear.
• Genetic approaches are needed to establish causality.

Purpose of the Study:

• To investigate the causal relationship between gut microbiota and CKD using a two-sample Mendelian randomization approach.
• To identify specific gut bacteria that causally influence CKD risk.
• To provide evidence for targeted gut microbiota therapies for CKD.

Main Methods:

• Utilized genome-wide association study (GWAS) data from public databases (MiBioGen, IEU OpenGWAS).
• Employed a two-sample Mendelian randomization analysis with five statistical methods (IVW, MR-Egger, Weighted Median, Simple Mode, Weighted Mode).
• Conducted sensitivity analyses for pleiotropy and heterogeneity, followed by False Discovery Rate correction.

Main Results:

• Seven bacterial genera showed initial associations with CKD.
• Escherichia-Shigella and Howardella were identified as significant risk factors for CKD after multiple testing correction.
• Ruminococcus (gauvreauii group) showed a potential protective association, though not significant after correction.

Conclusions:

• Escherichia-Shigella and Howardella are identified as potential causal risk factors for chronic kidney disease.
• These bacterial genera represent potential targets for novel therapeutic interventions in CKD.
• Further research is required to elucidate the precise mechanisms underlying these associations.