Examining the Link Between Periodontal Disease and Alzheimer’s: What You Need to Know

Link Between Poor Oral Hygiene and Alzheimer’s Disease

Study Overview

Recent research conducted by the University of Illinois at Chicago suggests that individuals with inadequate oral hygiene may face a heightened risk of developing Alzheimer’s disease. This condition represents the most prevalent form of dementia, impacting over 560,000 Canadians. Initially, Alzheimer’s manifests as mild memory loss, but as it advances, cognitive decline can severely hinder daily activities such as driving, managing bills, and preparing meals.

Understanding Gum Disease

Gum disease, known medically as periodontal disease, is a widespread infection that damages gum tissue and can lead to bone loss. Bacteria from the mouth can enter the bloodstream during eating or brushing, potentially spreading to other regions of the body.

Research Findings

The research team at the University of Illinois at Chicago aimed to explore whether oral bacteria could reach the brain and trigger an immune response that results in neuronal damage, leading to symptoms like confusion and memory loss. Their findings were published in the journal PLOS ONE.

Over a span of 22 weeks, the team studied a group of 10 mice that were exposed daily to periodontal bacteria, compared to a control group of 10 untreated mice. After the experimental period, the mice were euthanized for brain analysis. The results revealed the presence of DNA from periodontal bacteria in the brain tissue of the treated mice, along with bacterial proteins found within their neurons.

The study also noted an increase in gene expression linked to inflammation and degeneration in the brain of the mice exposed to the bacteria. Dr. Watanabe expressed surprise at the significant impact the periodontal pathogen had on brain health.

Implications and Future Research

While this study suggests a correlation between chronic periodontal infections and increased inflammation and neural degeneration, it is important to note that the research was conducted on only 10 mice. Future replication and enhancement of these studies could potentially establish poor oral hygiene as a risk factor or predictor for Alzheimer’s disease.

Reference

Ilievski, V., Zuchowska, P. K., Green, S. J., Toth, P. T., Ragozzino, M. E., Le, K., … & Watanabe, K. (2018). Chronic oral application of a periodontal pathogen results in brain inflammation, neurodegeneration and amyloid beta production in wild type mice. PloS one, 13(10), e0204941. https://doi.org/10.1371/journal.pone.0204941