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Updated: Dec 17, 2025
Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells
Published on: December 17, 2015
Is Porphyromonas gingivalis involved in Parkinson's disease?
Ingar Olsen1, Douglas B Kell2,3, Etheresia Pretorius3
1Department of Oral Biology, Faculty of Dentistry, University of Oslo, POB 1052 Blindern, 0316, Oslo, Norway. ingar.olsen@odont.uio.no.
Abstract:
Porphyromonas gingivalis, a major subgingival plaque bacterium in periodontitis, has recently attracted much attention as a possible microbial driver in Alzheimer's disease. In the present paper, another common neuroinflammatory disease, Parkinson's disease (PD), is discussed. A recent study found major virulence factors of P. gingivalis such as gingipain R1 (RgpA) and lipopolysaccharide in the blood circulation of a PD population. The current review reveals how features such as systemic inflammation, hypercoagulation, presence of amyloid fibrin(ogen) in plasma, and marked ultrastructural changes in platelets, probably induced by P. gingivalis, may affect the development of PD. Several other clinical studies have also demonstrated an association between periodontitis and PD. Even if the risk of periodontal diseases causing neurological disorders needs to be better substantiated, that should not keep us from trying to prevent them by performing careful daily dental hygiene.
Insights
Porphyromonas gingivalis, a bacterium linked to periodontitis, may contribute to Parkinson's disease (PD) development. Research found its virulence factors in PD patients, suggesting a connection via systemic inflammation and platelet changes.
Area of Science:
- Neuroscience
- Microbiology
- Periodontology
Background:
- Porphyromonas gingivalis is a key bacterium in periodontitis.
- It's increasingly investigated as a potential driver of neurodegenerative diseases like Alzheimer's.
- This review focuses on its potential role in Parkinson's disease (PD).
Purpose of the Study:
- To review the potential link between P. gingivalis and Parkinson's disease.
- To explore mechanisms by which oral bacteria may influence neuroinflammation and PD pathogenesis.
Main Methods:
- Literature review of studies investigating P. gingivalis, periodontitis, and PD.
- Analysis of findings on P. gingivalis virulence factors in PD patients' blood.
- Examination of proposed biological pathways connecting oral health to neurological disorders.
Main Results:
- Virulence factors of P. gingivalis, including gingipain R1 (RgpA) and lipopolysaccharide, were detected in the blood of PD patients.
- P. gingivalis may induce systemic inflammation, hypercoagulation, and platelet abnormalities, potentially contributing to PD.
- Clinical studies show an association between periodontitis and PD.
Conclusions:
- P. gingivalis is a plausible factor in the development or progression of Parkinson's disease.
- Preventing periodontal disease through diligent oral hygiene may be a strategy to mitigate risks for neurological disorders.
- Further research is needed to substantiate the causal link between periodontal disease and neurological conditions.
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