Autism spectrum disorders and nutritional interventions: dimethylglycine and B-vitamins effects on behaviour, inflammation, microbiota and mitochondria in liver and brain synapses.

Researchers tested whether giving dimethylglycine and B vitamins to mice with autism-like behaviors could help. They found that these supplements improved the mice's behavior and had positive effects throughout their bodies - reducing inflammation, improving gut bacteria, helping liver health, and boosting energy production in brain cells. While this is promising, the research was done in mice, so we don't yet know if the same benefits would occur in autistic children.

This study investigated the effects of dimethylglycine and B-vitamin supplementation on ASD-like behaviors in BTBR mice, a well-established autism model. The research focused on the gut-liver-brain axis, examining how these nutritional interventions affect behavior, inflammation, gut microbiota, and mitochondrial function. Results showed that supplementation reduced ASD-like behaviors through multiple mechanisms including decreased oxidative stress and inflammation, improved gut microbiota composition, reduced liver fat accumulation, and enhanced mitochondrial function in liver, brain cortex, and synaptic areas. The findings suggest these supplements may positively modulate metabolic and neuroinflammatory processes relevant to autism.

Results suggest dimethylglycine and B vitamins may offer therapeutic benefits through gut-liver-brain axis modulation. However, human clinical trials are needed before recommending these supplements for autism treatment. The multi-system effects indicate complex mechanisms that require further investigation.

Study conducted only in mouse model; sample size not reported; unclear study design details; no information on dose-response relationships; findings may not translate directly to humans with autism.

Autism Spectrum Disorders (ASD) are complex neurodevelopmental conditions with a multifactorial etiology, where genetic and environmental interactions lead to cellular dysfunctions in the brain and peripheral tissues, associated with dysbiosis, inflammation, oxidative stress, and mitochondrial impairment. Emerging evidence highlights the critical role of the gut microbiota in the metabolic and neuroinflammatory imbalances observed in ASD. In this context, the liver plays a pivotal metabolic role, being closely connected to the gut and brain through metabolic pathways, influencing overall health. Since nutritional interventions and bioactive food compounds are key modulators of these processes, this study aims to investigate the effects of dietary supplementation with dimethylglycine and B group vitamins on the metabolic and inflammatory state of BTBR mice, a well-established model of ASD, focusing on the gut-liver-brain axis.

Our findings indicate that dimethylglycine and B group vitamins administration in BTBR mice mitigates ASD-like behaviors. This beneficial effect may be the result of multiple mechanisms as decrease in oxidative stress and inflammatory state, modulation of gut microbiota and body composition, reduced hepatic steatosis, and improved mitochondria functions in liver, brain cortex and synaptic areas. These results suggest that dietary supplementation with dimethylglycine and B vitamins can positively modulate the gut-liver-brain axis in ASD, offering new insights into metabolic and neuroinflammatory interventions.