›› 2020, Vol. 11 ›› Issue (1): 28-31.

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Tolerance Induced by Porphyromonas gingivalis Alleviates Periodontal Alveolar Bone Resorption in Mice

  

  • Received:2019-10-23 Revised:2019-11-11 Online:2020-03-25 Published:2020-04-07

Abstract: Objective: To investigate the effects of tolerance induced by Porphyromonas gingivalis (P.gingivalis) on bone resorption related cytokines, including IL-1β, osteoprotegerin (OPG)/receptor activator of NF-κB ligand (RANKL), and alveolar bone resorption in mice. Methods: Tolerance in murine periodontal tissues was induced by orally inoculation with 1×109CFU P.gingivalis for 5 days, washing with PBS and inoculation with P.gingivalis again for additional 2 days. After 10 days, fresh gingivae were collected and the expression levels of IL-1β, OPG and RANKL were detected by western bolt. 6 weeks later, maxillae were collected and the distances from the cementoenamel junction (CEJ) to the alveolar bone crest (ABC) were evaluated by methylene blue staining. Results: The expression levels of IL-1β in gingivae from P.gingivalis-tolerant mice were lower than those from non-tolerant group and the ratio of OPG/RANKL expression levels was higher than that of non-tolerant group. Less bone absorption was observed in tolerant group compared with that in non-tolerant mice (P<0.05). Conclusion:Tolerance induced by P.gingivalis could suppress

Key words: Porphyromonas gingivalis, tolerance, alveolar bone, resorption