Oral Microbiome and Alzheimer's Disease

Area of Science:

• Neuroscience
• Microbiology
• Immunology

Background:

• Alzheimer's disease (AD) is characterized by amyloid-beta (Aβ) plaque accumulation in the brain.
• Aβ responses are hypothesized to involve host immune reactions to pathogens in the central nervous system (CNS) and periphery.
• Oral microbial dysbiosis, common in older adults, is a potential contributing factor to AD.

Purpose of the Study:

• To summarize research investigating the role of oral microbiomes in the pathogenesis of Alzheimer's disease.
• To explore the link between oral microbial dysbiosis and central nervous system pathology in AD.
• To highlight the presence of oral-derived microbiomes in the brains of AD patients.

Main Methods:

• Review of existing scientific literature on oral microbiome and Alzheimer's disease.
• Analysis of studies linking oral dysbiosis to brain Aβ load.
• Examination of research identifying oral-derived microbes in neurodegenerative disease brains.

Main Results:

• Recent studies indicate a correlation between oral microbial dysbiosis and increased brain Aβ load.
• Oral-derived microbiomes have been identified in the brains of individuals with Alzheimer's disease and other neurodegenerative conditions.
• Oral health may play a significant role in the development and progression of neurodegenerative diseases.

Conclusions:

• Oral microbial dysbiosis is a potential contributor to Alzheimer's disease pathogenesis.
• Further research is warranted to elucidate the mechanisms by which oral bacteria influence CNS pathology.
• Targeting oral health may represent a novel strategy for AD prevention or treatment.