Introduction to the Special Issue "The Brain-Gut Axis"

Area of Science:

• Neuroscience
• Gastroenterology
• Microbiology

Background:

• The brain-gut axis describes the bidirectional communication between the central nervous system and the gastrointestinal tract.
• The gut microbiome significantly influences this axis, impacting both digestive and neurological health.
• Dysbiosis, an imbalance in gut bacteria, is increasingly linked to various diseases.

Discussion:

• Gut microbiota dysbiosis triggers immune activation and increased intestinal permeability.
• This leads to bacterial translocation, neuroinflammation, and epigenetic modifications.
• Alterations in the brain-gut axis are implicated in neurodegenerative diseases such as Alzheimer's and Parkinson's disease, as well as hypertension, stroke, epilepsy, and autism.

Key Insights:

• The microbiome-gut-brain axis is a critical factor in the development and progression of neurological disorders.
• Neuroinflammation, cerebrovascular changes, and protein aggregation are key pathological mechanisms.
• Specific brainstem nuclei, like the NTS and DMV, regulate gut function via the vagus nerve.

Outlook:

• Further research into the microbiome-gut-brain axis offers potential therapeutic targets for neurological conditions.
• Understanding these bidirectional interactions is crucial for developing novel treatment strategies.
• This special issue highlights state-of-the-art advances in this rapidly evolving field.