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Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells
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Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells

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Porphyromonas gingivalis enzymes enhance infection with human metapneumovirus in vitro

Krzysztof Pyrc1, Paulina Strzyz1, Aleksandra Milewska1

  • 1Microbiology Department, Faculty of Biochemistry Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland.

The Journal of General Virology
|July 1, 2011
PubMed

Insights

Porphyromonas gingivalis proteases, called gingipains, significantly enhanced human metapneumovirus (HMPV) replication in cell cultures. This finding suggests a potential link between periodontitis and HMPV severity in coinfected patients.

Area of Science:

  • Microbiology
  • Virology
  • Immunology

Background:

  • Human metapneumovirus (HMPV) is a significant cause of respiratory illness globally.
  • Coinfections with viruses and bacteria can lead to complex disease presentations and outcomes.
  • Bacterial virulence factors can enhance viral replication and alter host immune responses.

Purpose of the Study:

  • To investigate the effect of Porphyromonas gingivalis proteases (gingipains) on HMPV replication.
  • To explore potential interactions between periodontitis-associated bacteria and HMPV pathogenicity.

Main Methods:

  • Utilized LLC-MK2 cells for in vitro experiments.
  • Assessed HMPV replication in the presence of gingipains.
  • Compared the effects of gingipains with Staphylococcus aureus proteases and human neutrophil elastase.

Main Results:

  • Gingipains at low nanomolar concentrations facilitated HMPV replication and propagation in vitro.
  • Unlike influenza virus, HMPV replication was not affected by Staphylococcus aureus proteases or human neutrophil elastase.
  • This study highlights a specific interaction between P. gingivalis and HMPV.

Conclusions:

  • Gingipains play a role in enhancing HMPV replication.
  • The findings suggest a potential mechanism contributing to HMPV pathogenicity in individuals with periodontitis.
  • Further research is warranted to elucidate the clinical implications of this viral-bacterial interaction.

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