Distinct diet-microbiome associations in autism spectrum disorder

Area of Science:

• Microbiome research
• Neurodevelopmental disorders
• Nutritional science

Background:

• Autism spectrum disorder (ASD) is associated with altered gut microbiota and diet.
• The precise mechanisms linking diet, microbiome, and ASD remain unclear.

Purpose of the Study:

• To investigate the mechanistic connections between diet, gut microbiome, and ASD.
• To identify specific dietary factors influencing the microbiome in children with ASD.

Main Methods:

• Systematic analysis of fecal microbiome metagenomic data from 818 children (462 with ASD).
• Integration of dietary indices, nutrient intake, and food additive exposures.
• Comparison of diet-microbiome interaction networks between children with and without ASD.

Main Results:

• Poor dietary quality correlated with core autistic symptoms, GI issues, and eating behaviors.
• Children with ASD showed a more pronounced diet-microbiome interaction network.
• Synthetic emulsifiers (polysorbate-80, carrageenan) disrupted microbial connectivity in ASD.

Conclusions:

• Dietary factors, especially synthetic additives, mechanistically link to microbiome dysregulation in ASD.
• Findings suggest heightened microbial sensitivity to nutrition in ASD.
• Re-evaluation of dietary guidelines and personalized nutrition strategies for ASD are warranted.