Potential Bidirectional Relationship Between Periodontitis and Alzheimer's Disease

Area of Science:

• Neuroscience
• Oral Health
• Public Health

Background:

• Alzheimer's disease (AD) is the leading cause of dementia, with unclear etiology and no effective disease-modifying treatments.
• Growing evidence suggests a connection between systemic inflammation/infection and AD progression.
• Periodontitis, a chronic oral inflammatory condition, is emerging as a potential risk factor for AD.

Purpose of the Study:

• To review emerging preclinical and clinical evidence linking periodontitis and Alzheimer's disease.
• To explore potential mechanisms connecting oral health and brain pathology in AD.
• To discuss shared risk factors and inflammatory phenotypes between periodontitis and AD.

Main Methods:

• Review of current scientific literature, including preclinical and clinical studies.
• Analysis of data on oral pathogens, systemic inflammation, and brain function.
• Examination of shared risk factors and hyper-inflammatory markers.

Main Results:

• Studies indicate oral pathogens can enter the bloodstream and potentially infect the brain in AD patients.
• Poor oral hygiene in advanced AD stages can exacerbate periodontitis, creating a cycle of inflammation.
• Periodontitis and AD share common risk factors and exhibit similar hyper-inflammatory characteristics.

Conclusions:

• Periodontitis is a significant factor to consider in Alzheimer's disease research and potentially in prevention strategies.
• Further research is needed to fully elucidate the mechanisms connecting periodontitis and AD.
• Addressing oral health may offer a novel approach to managing AD risk or progression.