Dietary Pattern, Gut Microbiota, and Alzheimer's Disease

Area of Science:

• Neuroscience
• Microbiology
• Nutrition Science

Background:

• Alzheimer's disease (AD) is a leading neurodegenerative disorder with no cure.
• Dietary patterns show potential in preventing or delaying AD progression.
• The gut microbiota plays a role in AD pathogenesis through microbial metabolites.

Purpose of the Study:

• To review the neuropathological mechanisms of Alzheimer's disease.
• To discuss how dietary patterns, via the gut-brain axis, modulate AD.
• To highlight the link between gut microbiota and AD.

Main Methods:

• Literature review of studies on Alzheimer's disease and gut microbiota.
• Analysis of the impact of diet on gut microbial composition and function.
• Examination of the gut-brain axis in relation to AD pathogenesis.

Main Results:

• Gut microbial composition differs in Alzheimer's patients, with lower levels of anti-inflammatory bacteria like Eubacterium rectale and Bacteroides fragilis.
• Gut microbial metabolites (e.g., pro-inflammatory factors, SCFAs) can influence AD pathology.
• Diet impacts inflammation, metabolism, and oxidative stress relevant to AD through the gut microbiota.

Conclusions:

• Dietary interventions targeting the gut microbiota may offer a strategy for managing Alzheimer's disease.
• Modulating the gut-brain axis through diet is a promising approach for AD prevention and delay.
• Further research into specific dietary patterns and their effects on the gut microbiome is warranted.