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Coaggregation between Porphyromonas gingivalis and mutans streptococci

A Kamaguchi1, H Baba, M Hoshi

  • 1Department of Oral Microbiology, School of Dentistry, Health Sciences University of Hokkaido, Japan.

Microbiology and Immunology
|January 1, 1994
PubMed
Summary
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Porphyromonas gingivalis and mutans streptococci coaggregate, a process involving bacterial proteins. This interaction, crucial for oral health, can be inhibited by specific compounds like L-arginine and trypsin inhibitors.

Area of Science:

  • Microbiology
  • Oral Health
  • Bacterial Interactions

Background:

  • Porphyromonas gingivalis and mutans streptococci are key pathogens in periodontal disease and dental caries, respectively.
  • Understanding their interactions is vital for developing targeted prevention and treatment strategies.

Purpose of the Study:

  • To investigate the coaggregation phenomenon between Porphyromonas gingivalis and mutans streptococci.
  • To identify the specific bacterial components involved in this interaction and explore potential inhibitors.

Main Methods:

  • Coaggregation assays were performed between P. gingivalis and mutans streptococci.
  • The role of bacterial substances was assessed using heat and proteinase K treatments.
  • Inhibitory effects of various compounds (L-arginine, TLCK, trypsin inhibitor, L-lysine, N-ethylmaleimide, lysozyme, saliva) were evaluated.

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Main Results:

  • Significant coaggregation was observed between P. gingivalis and mutans streptococci.
  • L-arginine, TLCK, and a trypsin inhibitor completely inhibited coaggregation.
  • Heat-labile proteinaceous substance from P. gingivalis and heat-stable substance from mutans streptococci were implicated.
  • Mutans streptococci aggregation was induced by P. gingivalis supernatant.

Conclusions:

  • A proteinaceous factor from P. gingivalis and a heat-stable factor from mutans streptococci mediate their coaggregation.
  • Specific inhibitors, including L-arginine and trypsin inhibitors, can effectively block this interaction.
  • These findings provide insights into microbial interactions relevant to oral biofilm formation.