Ketogenic diet fails to mitigate seizures and neuroinflammatory responses in a mouse model of virus-induced epilepsy.

Summary

This experimental study evaluated whether the ketogenic diet—typically effective in reducing seizures through metabolic and microbiota-dependent mechanisms—could mitigate seizures and neuroinflammatory responses in a mouse model of virus-induced epilepsy. Despite inducing ketosis and substantially reshaping gut microbial composition (enriching Akkermansia and depleting fibre-associated taxa), the ketogenic diet failed to reduce seizure incidence, burden, or severity, nor did it significantly reduce overall immune cell infiltration into the central nervous system. The findings suggest that the anticonvulsant mechanisms of the ketogenic diet may not translate to infection-driven seizures characterised by acute neuroinflammation.

Regional applicability

This is a preclinical mouse model study conducted in the United States and does not directly apply to United Kingdom clinical practice. However, the negative finding—that ketogenic diet failed to protect against inflammation-driven seizures—has potential relevance for neurologists and epilepsy specialists in the UK considering dietary interventions for infection-induced seizures, suggesting caution in extrapolating ketogenic diet efficacy from other epilepsy types to viral infection contexts.

Key measures

Seizure incidence, seizure burden, seizure severity, flow cytometry for immune cell infiltration, 16S rRNA gene sequencing for gut microbiota composition (alpha diversity metrics: richness, Shannon diversity, evenness)

Outcomes reported

The study measured seizure incidence, burden and severity, central nervous system immune cell infiltration, and gut microbiota composition in mice infected with Theiler's murine encephalomyelitis virus (TMEV) and maintained on either ketogenic or normal diet. Findings indicated that despite achieving ketosis and reshaping the gut microbiota, the ketogenic diet did not reduce seizures or significantly alter neuroinflammatory responses during acute viral infection.

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