Purification and characterization of porphyromonas gingivalis outer membrane antigens

Boris Polak, Michael A. Peck, John K. Dyer, Philip S. Bird, Richard A. Reinhardt, Gregory J. Seymour

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Porphyromonas gingivalis is strongly associated with periodontal disease. Significant titres of specific IgG antibodies to P. gingivalis can be found in healthy individuals and those with periodontitis. In this study, 22 outer membrane antigens ranging from 15.5 to 107.6 kDa were recognized by sera from persons with periodontitis and controls. Serum from individuals with periodontitis showed a significantly higher IgG response to a 31.4-kDa antigen (p < 0.05); serum from those with gingivitis demonstrated a significantly higher response to a 15.5-kDa antigen (p < 0.05). The response to the 15.5-kDa antigen might represent a protective immune response while that to the 31.4-kDa could serve as a marker for disease susceptibility. These two antigens were purified to homogeneity and their N-terminal amino acid sequences determined. The sequences did not correspond to any previously described P. gingivalis antigens. The role of these two antigens in the pathogenesis of periodontal disease remains to be determined.

Original languageEnglish (US)
Pages (from-to)905-912
Number of pages8
JournalArchives of Oral Biology
Issue number10
StatePublished - Oct 1995


  • Porphyromonas gingivalis
  • outer membrane antigens
  • periodontal disease
  • purification
  • western blotting

ASJC Scopus subject areas

  • Otorhinolaryngology
  • General Dentistry
  • Cell Biology


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