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Porphyromonas gingivalis Promotes Oral Squamous Cell Carcinoma Progression by Modulating Autophagy.

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Porphyromonas gingivalis (P. gingivalis) accelerates oral squamous cell carcinoma (OSCC) progression by promoting autophagy and reducing apoptosis. This bacterium was more prevalent in OSCC patients, suggesting a significant role in oral cancer development.

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Area of Science:

  • Oral oncology
  • Microbiology
  • Cancer research

Background:

  • Porphyromonas gingivalis (P. gingivalis) is linked to gastrointestinal cancers.
  • Its role in oral squamous cell carcinoma (OSCC) and the underlying mechanisms are not fully understood.

Purpose of the Study:

  • To investigate the effect of P. gingivalis on OSCC progression.
  • To elucidate the mechanism by which P. gingivalis influences OSCC development.

Main Methods:

  • Utilized OSCC xenograft models to assess tumor progression in vivo.
  • Conducted in vitro functional studies on OSCC cell lines.
  • Employed P. gingivalis-specific 16S rRNA fluorescent in situ hybridization (FISH) for clinical sample analysis.

Main Results:

  • P. gingivalis significantly increased tumor volume and growth in OSCC models.
  • P. gingivalis inhibited OSCC cell apoptosis by promoting cellular autophagy.
  • P. gingivalis was detected more frequently in OSCC patients compared to leukoplakia or healthy individuals.

Conclusions:

  • P. gingivalis accelerates OSCC progression.
  • The bacterium enhances the autophagy pathway, leading to reduced carcinoma apoptosis.
  • P. gingivalis prevalence is higher in OSCC patients, supporting its role in oral cancer.