Microbiome Influence in the Pathogenesis of Prion and Alzheimer's Diseases

Area of Science:

• Neuroscience
• Microbiology
• Genetics

Background:

• Misfolded proteins, like cellular prion protein (PrP^C) and amyloid beta (Aβ), drive neurodegenerative diseases such as prion disease and Alzheimer's disease (AD).
• Protein aggregate seeding, a "prion-like" mechanism, contributes to the spread of pathology in AD, tauopathies, and Parkinson's disease.
• Mutations in PrP^C and amyloid precursor protein (APP) are linked to disease pathogenesis.

Purpose of the Study:

• To review the emerging role of gut microbiome alterations in the pathogenesis of Alzheimer's disease and prion diseases.
• To explore the connection between the gut-brain axis, microbial dysbiosis, and neurodegeneration.

Main Methods:

• Literature review focusing on studies investigating the gut microbiome's influence on neurodegenerative disease mechanisms.
• Analysis of research linking gut microbiota to amyloid beta production and microglial inflammation.
• Examination of evidence for "prion-like" protein seeding in various neurodegenerative conditions.

Main Results:

• Gut microbiota alterations are increasingly implicated in regulating Aβ production in AD.
• Microbial dysbiosis can influence microglial inflammation, contributing to amyloid fibril formation in prion diseases.
• The gut-brain axis plays a significant role in modulating these disease processes.

Conclusions:

• The gut microbiome represents a critical factor in the pathogenesis of Alzheimer's disease and prion diseases.
• Targeting the gut microbiota may offer novel therapeutic strategies for neurodegenerative disorders.
• Further research into the microbiome-gut-brain axis is essential for understanding and treating these conditions.