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Updated: Aug 13, 2026
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Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells
Published on: December 17, 2015
S-Nitrosothiols modulate Porphyromonas gingivalis virulence
Tsian D Ramrattan1, Evan R Stair1, Shreya Dandu1
1Department of Chemistry, College of Arts and Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, United States.
Redox Biology
|August 11, 2026
Summary
Nitric oxide (NO) effectively combats Porphyromonas gingivalis, the main cause of periodontal disease. This study shows NO reduces virulence factors, biofilm formation, and host cell invasion, offering a promising therapeutic strategy.
Area of Science:
- Microbiology
- Immunology
- Dentistry
Background:
- Porphyromonas gingivalis is a primary pathogen in periodontal disease, a widespread chronic oral inflammatory condition.
- Virulence factors like gingipains drive microbial dysbiosis, necessitating therapeutic interventions beyond endogenous nitric oxide (NO).
Purpose of the Study:
- To investigate the impact of exogenous nitric oxide (NO) on Porphyromonas gingivalis virulence.
- To assess NO's effects on biofilm formation, gingipain activity, host cell invasion, and immune response modulation.
Main Methods:
- Exposure of anaerobic P. gingivalis to exogenous NO.
- Analysis of biofilm formation, gingipain activity, and host cell invasion.
- Evaluation of NO's influence on virulence factor export and immune evasion.
Main Results:
- Exogenous NO significantly reduced P. gingivalis biofilm formation and gingipain activity.
- NO exposure altered gingipain export, decreasing pathogen invasion of host cells.
- NO demonstrated multimodal effects on P. gingivalis virulence via transnitrosylation and nitrosative stresses.
Conclusions:
- Exogenous NO effectively modulates P. gingivalis virulence, reducing key pathogenic mechanisms.
- NO presents a promising therapeutic strategy for periodontal disease due to its antimicrobial and anti-virulence properties.
- This research highlights NO's potential to restore oral homeostasis by targeting P. gingivalis.
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