Gut microbial molecules in behavioural and neurodegenerative conditions

Summary

This Nature Reviews Neuroscience perspective synthesises recent evidence on how the gut microbiome influences brain function through production of neuroactive bacterial metabolites and signalling molecules. The review describes mechanistic pathways by which microbial-derived compounds cross physiological barriers and modulate neurological and behavioural outcomes, with particular emphasis on their potential roles in psychiatric and neurodegenerative disease. The authors acknowledge that many discoveries are recent and largely preclinical, with further validation needed before clinical translation.

Regional applicability

This is a mechanistic review of gut–brain axis biology grounded primarily in animal model studies. Its relevance to United Kingdom clinical practice and policy depends on translation of these preclinical findings to human populations; it does not directly assess dietary or farming interventions applicable to UK nutrition policy or agricultural practice.

Key measures

Bacterial metabolites with neuromodulatory activity; signalling pathways from gut microbiota to brain; direct molecular effects on specific brain cells

Outcomes reported

The review synthesises evidence on how bacterial metabolites and microbial signalling molecules produced in the gastrointestinal tract influence brain development, function, and neurological health. It describes mechanistic pathways by which gut microbiota-derived compounds modulate behaviour and may contribute to neurodevelopmental, psychiatric, and neurodegenerative conditions.

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