Causal associations between gut microbiota, circulating inflammatory proteins, and epilepsy: a multivariable...

Area of Science:

• Neuroscience
• Microbiology
• Immunology

Background:

• Gut microbiota (GM) involvement in epilepsy pathogenesis via the microbiota-gut-brain axis (MGBA) is suggested.
• The causal relationship between GM, epilepsy subtypes, and the mediating role of inflammatory proteins remains unclear.
• Identifying specific GM and inflammatory mechanisms is crucial for epilepsy risk prediction and management.

Purpose of the Study:

• To investigate the causal relationship between GM, inflammatory proteins, and epilepsy subtypes.
• To determine if inflammatory proteins mediate the pathway from GM to epilepsy.
• To identify specific GM and inflammatory markers associated with epilepsy.

Main Methods:

• Utilized large-scale genome-wide association studies (GWAS) summary data.
• Employed Multivariate Mendelian Randomization (MR) with Inverse Variance Weighted (IVW) as the primary method.
• Supplemented MR analysis with MR-Egger, Weighted Median Estimator, Weighted Mode, and Simple Mode.

Main Results:

• Identified 16 positive and 3 negative causal associations between GM genetic liability and epilepsy.
• Found 9 positive and 9 negative causal associations between inflammatory proteins and epilepsy.
• Demonstrated that CXCL11 levels mediate the causal link between a specific gut bacterial group and epilepsy.

Conclusions:

• Specific gut microbiota and inflammatory proteins likely play a causal role in epilepsy development.
• Circulating inflammatory proteins may mediate epileptogenesis through the microbiota-gut-brain axis.
• Findings support targeted interventions focusing on GM and inflammation for epilepsy treatment.