The Brain-Gut-Microbiome System: Pathways and Implications for Autism Spectrum Disorder

Area of Science:

• Neuroscience
• Microbiology
• Gastroenterology

Background:

• Gastrointestinal dysfunction is a common symptom in autism spectrum disorder (ASD).
• Emerging research suggests a link between gut microbiota dysbiosis and altered brain function/social behavior in ASD.
• Mechanisms underlying the gut-brain-microbiome axis in ASD pathogenesis remain largely unclear.

Purpose of the Study:

• To review the current understanding of the brain-gut-microbiome system in ASD.
• To elucidate the mechanisms by which gut microbiota influences behavior and ASD development.
• To discuss microbiota-targeted therapies for ASD symptoms.

Main Methods:

• Review of preclinical (animal) and clinical (human) studies.
• Analysis of research on the gut-brain-microbiome axis in relation to ASD.
• Examination of molecular, structural, and functional brain alterations linked to microbiota.

Main Results:

• Gut microbiota composition and metabolites can influence brain function, social behavior, and neurological impairments in ASD.
• Microbiota-targeted interventions like probiotics and fecal microbiota transplantation show potential therapeutic benefits in ASD.
• Specific interactions within the microbiome-brain-behavior system impact social and emotion-related brain networks.

Conclusions:

• Understanding the microbiome-brain-behavior interactions is crucial for developing novel therapeutic strategies for ASD.
• Modulating the gut microbiome may alleviate both behavioral and physiological symptoms in individuals with ASD.
• Further research is needed to fully elucidate these complex interactions and optimize treatments.