Gut Microbiota Influence on Neurodevelopment and Behavior Disorders

The gut microbiota exerts profound effects on neurodevelopment and the emergence of behavioural disorders via a bidirectional communication network known as the microbiota-gut-brain axis. During critical windows of prenatal and early postnatal life, colonisation patterns shape neural circuit formation, myelination and synaptic plasticity. Experimental models in germ-free and antibiotic-treated rodents have revealed that disruptions of the gut microbial community, or dysbiosis, alter the maturational trajectory of the blood–brain barrier, microglial function and the hypothalamic–pituitary–adrenal axis, leading to enduring changes in anxiety-like, social and cognitive behaviours. Key mechanisms include microbial modulation of immune signalling, production of neuroactive metabolites (for example, short-chain fatty acids and tryptophan catabolites) and regulation of neurotransmitter systems. Human cohort studies associate altered microbial diversity and specific bacterial taxa with neurodevelopmental disorders such as autism spectrum disorder and attention deficit/hyperactivity disorder, as well as mood disorders. Interventions targeting the microbiota—ranging from dietary modulation and probiotics to faecal microbiota transplantation—offer promising avenues for prevention and therapy, with particular relevance for low-resource settings where nutritional approaches may be most accessible.

Research from Nature Portfolio

Recent studies have demonstrated that low-dose penicillin exposure during late gestation and early postnatal life induces long-lasting alterations in the gut microbiota of mice, accompanied by elevated pro-inflammatory cytokines in the frontal cortex and compromised blood–brain barrier integrity. These animals display persistent deficits in social interaction and heightened anxiety-like behaviour. Concomitant supplementation with Lactobacillus rhamnosus JB-1 mitigates both neurochemical disturbances and behavioural anomalies, underscoring the potential of targeted microbial therapies during critical developmental windows.

Gut Microbiota Influence on Neurodevelopment and Behavior Disorders publication trend

The graph below shows the total number of articles in gut microbiota influence on neurodevelopment and behavior disorders across all publications each year (not limited to Nature Index journals).

Technical terms

Gut microbiota: The community of microorganisms residing in the gastrointestinal tract that influences host physiology.

Dysbiosis: A disruption or imbalance in the composition or function of the gut microbiota.

Microbiota-gut-brain axis: The bidirectional network through which gut microbes communicate with the central nervous system via neural, immune and endocrine pathways.

Blood–brain barrier (BBB): A specialised endothelial interface that regulates the passage of molecules and cells between the bloodstream and the brain.

Metabolome: The complete set of small-molecule metabolites present within a biological sample, reflecting biochemical activity.

References

1. The gut microbiota–brain axis in neurological disorders. MedComm (2024).
2. Regulation of prefrontal cortex myelination by the microbiota. Translational Psychiatry (2016).
3. Low-dose penicillin in early life induces long-term changes in murine gut microbiota, brain cytokines and behavior. Nature Communications (2017).
4. Cluster-specific associations between the gut microbiota and behavioral outcomes in preschool-aged children. Microbiome (2024).
5. A systematic review exploring the association between the human gut microbiota and brain connectivity in health and disease. Molecular Psychiatry (2023).
6. Limosilactobacillus reuteri normalizes blood–brain barrier dysfunction and neurodevelopment deficits associated with prenatal exposure to lipopolysaccharide. Gut Microbes (2023).
7. Gut Microbiota and the Neuroendocrine System. Neurotherapeutics (2018).