Vaccination with recombinant RgpA peptide protects against Porphyromonas gingivalis-induced bone loss

A. Wilensky*, J. Potempa, Y. Houri-Haddad, L. Shapira

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Objective: Following Porphyromonas gingivalis infection in mice, the efficacy of vaccination by recombinant and native RgpA in modulating the early local anti-inflammatory and immune responses and periodontal bone loss were examined. Material and Methods: Using the subcutaneous chamber model, exudates were analyzed for cytokines after treatment with native RgpA and adjuvant (test), or adjuvant and saline alone (controls). Mice were also immunized with recombinant RgpA after being orally infected with P. gingivalis. After 6 wk, serum was examined for anti-P. gingivalis IgG1 and IgG2a titers and for alveolar bone resorption. Results: Immunization with native RgpA shifted the immune response toward an anti-inflammatory response as demonstrated by decreased proinflammatory cytokine IL-1β production and greater anti-inflammatory cytokine IL-4 in chamber exudates. Systemically, immunization with recombinant RgpA peptide prevented alveolar bone loss by 50%, similar to immunization with heat-killed whole bacteria. Furthermore, recombinant RgpA shifted the humoral response toward high IgG1 and low IgG2a titers, representing an in vivo anti-inflammatory response. Conclusions: The present study demonstrates the potential of RgpA to shift the early local immune response toward an anti-inflammatory response while vaccination with recRgpA protected against P. gingivalis-induced periodontitis.

Original languageAmerican English
Pages (from-to)285-291
Number of pages7
JournalJournal of Periodontal Research
Issue number2
StatePublished - 1 Apr 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd


  • Porphyromonas gingivalis
  • experimental periodontitis
  • gingipains
  • vaccine


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