Autism Spectrum Disorder (ASD) symptoms may be improved through modulation of gut microbiota. This study investigated the effects of a synbiotic treatment on an ASD-like mouse model, and found that it rectified social impairments, attenuated inflammatory cytokine expressions, protected gut barrier integrity, and altered gut microbiota composition. The synbiotic treatment elevated beneficial metabolites and upregulated genes associated with their synthesis. Overall, the synbiotic combination mitigated ASD-related social impairments through regulation of the gut-brain axis.
Autism Spectrum Disorder (ASD), a complex neurodevelopmental disorder marked by social communication deficits and repetitive behaviors, may see symptom amelioration through gut microbiota modulation. This study investigates the effects of a synbiotic - specifically a probiotic amplified by prebiotic supplementation - on ASD-like mouse model's social deficiencies. This model was established via valproic acid injection into pregnant females. Post-weaning, male progeny received daily synbiotic treatment, a combination of Lactobacillus reuteri (L. reuteri) and inulin, for four weeks. Results indicated that the synbiotic rectified social impairments and attenuated inflammatory cytokine expressions in the brain. Moreover, synbiotic intervention protected gut barrier integrity and altered the gut microbiota composition, enhancing the butyrate-producing Bifidobacterium abundance. The synbiotic elevated metabolites such as butyrate and 3-hydroxybutyric acid (3-HB), alongside upregulated genes associated with 3-HB synthesis in the colon and liver, and brain receptors. Conclusively, the synbiotic combination of L. reuteri and inulin mitigated ASD-related social impairments, partially via their regulatory effect on the gut-brain axis.
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