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Responsiveness to Lipopolysaccharide Changes According to the Aging of Periodontal Ligament Fibroblasts

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Authors
Kim, Gwan-Shik; Jun, Ji-Hae; Woo, Kyung-Mi; Min, Byung-Moo; Baek, Jeong-Hwa
Issue Date
2005-03
Publisher
Korean Acadamy of Oral Biology
Citation
International Journal of Oral Biology. 30(1):1-8
Keywords
In vitro agingPeriodontal ligament fibroblastsLipopolysaccharideatory cytokineChemokineMatrix metalloprotease-2Toll-like receptor
Abstract
The elderly suffer from an impaired immune function being obvious in a higher susceptibility to infections. Although the inflammatory cells are the major immunomodulatory cells, fibroblasts also secrete a variety of inflammatory cytokines and chemokines. Therefore periodontal tissue aging might playa role in development and progress of periodontitis. In this study, we investigated the effect of in vitro periodontal ligament cellular aging on the inflammatory cytokines, chemokines, and matrix metalloprotease(MMP)-2 expression induced by lipopolysaccharide(LPS) treatment. Three different cell populations were used; passages 4-5, 14-15, and 24-25 (at passage 27, more than 90% cells were replicative senescent). LPS increased the expression of interleukin(IL)-1, IL-6, and tumor necrosis factor-, IL-8, RANTES, and MMP-2. However, the order of induction folds were passages 14-15 > 4-5 > 24-25. While the expression level of Toll-like receptor(TLR) 4 decreased according to the increase in passage number, the level of TLR2 was highest at passages 14-15 and then decreased at passages 24-25. While the spontaneous expression of IL-8 decreased according to the increase in passage number, that of RANTES and proMMP-2 increased according to the increase in passage number. These results suggest that the aging of periodontal ligament fibroblasts differentially affect the role as immunomodulatory cells in response to periodontopathic bacteria and therefore might be another risk factor of periodontitis progression.
ISSN
1226-7155
Language
English
URI
http://hdl.handle.net/10371/69613
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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