Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-32362
Belibasakis, G N; Bostanci, N; Reddi, D (2010). Regulation of protease-activated receptor-2 expression in gingival fibroblasts and Jurkat T cells by Porphyromonas gingivalis. Cell Biology International, 34(3):287-292.
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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.
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > Center for Dental Medicine > Institute of Oral Biology|
|Dewey Decimal Classification:||610 Medicine & health|
|Deposited On:||05 Mar 2010 14:39|
|Last Modified:||18 Jul 2014 18:58|
|Free access at:||Publisher DOI. An embargo period may apply.|
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