Gut Bacteria, Nutrition, and Brain-Body Links in ALS: Inflammation, Disease Processes, and Symptoms Beyond Movement

A profound taxonomic shift in the microbiota of patients with ALS is characterized by severe depletion of protective bacteria and enrichment of pro-inflammatory strains.

• Patients with ALS exhibit significant changes in gut microbiota, including loss of beneficial bacteria that produce butyrate.
• Dysbiosis in ALS is linked to damage in the intestinal lining and disruption of tight junction proteins, resulting in a 'leaky gut.'
• The systemic release of bacterial components like lipopolysaccharides may lead to inflammation in the nervous system and increased neuron death.
• Therapeutic approaches such as Fecal Microbiota Transplantation and specific diets have shown potential in improving gut health and reducing anxiety in ALS patients.
• There is a notable research gap regarding the detailed structure of the enteric nervous system in ALS, indicating a need for further investigation.

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