Back
Full-text
Journal article

Regulation of protease-activated receptor-2 expression in gingival fibroblasts and Jurkat T cells by Porphyromonas gingivalis.

  • Belibasakis GN Department of Oral Microbiology and General Immunology, Institute of Oral Biology, ZZMK, Faculty of Medicine, University of Zurich, Zurich, Switzerland. george.belibasakis@zzmk.uzh.ch
  • Bostanci N
  • Reddi D
  • 2009-12-02
Published in:
  • Cell biology international. - 2010
Cell Line
Cysteine Proteases
Fibroblasts
Gingiva
Humans
Jurkat Cells
Porphyromonas gingivalis
Receptor, PAR-2
T-Lymphocytes
Up-Regulation
English Periodontal disease destroys the tooth-supporting tissues as a result of chronic inflammation elicited by bacterial accumulation on tooth surfaces. Porphyromonas gingivalis is a major periodontal pathogen, with a significant capacity to perturb connective tissue homeostasis and immune responses in the periodontium, attributed to its virulence factors, including a group of secreted cysteine proteases (gingipains). PAR-2 (protease-activated receptor-2) is a G-protein-coupled receptor activated upon proteolytic cleavage, mediating intracellular signalling events related to infection and inflammation, such as cytokine production. GF (gingival fibroblasts) and T cells have central roles in periodontal inflammation, which can potentially be mediated by PAR-2. The aims of this study were to investigate the effects of P. gingivalis on PAR-2 gene expression in human GF and Jurkat T cells, using quantitative real-time PCR, and to evaluate the involvement of gingipains. After 6 h of challenge with ascending concentrations of P. gingivalis, PAR-2 expression was up-regulated in both cell types by approximately 5-fold, compared with the control. The P. gingivalis concentration required for maximal PAR-2 induction was 4-fold greater in GF than Jurkat T cells. Heat inactivation or chemical inhibition of cysteine proteases abolished the capacity of P. gingivalis to induce PAR-2 expression in Jurkat T cells. In conclusion, P. gingivalis can induce PAR-2 expression in GF and Jurkat T cells, potentially attributed to its gingipains. These findings denote that P. gingivalis may perturb the host immune and inflammatory responses by enhancing PAR-2 expression, thus contributing to the pathogenesis of periodontal disease.
Language
  • English
Open access status
green
Identifiers
Persistent URL
https://sonar.ch/global/documents/4558
Statistics
Document views: 45 File downloads:
  • Full-text: 0