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Response of epithelial cells infected by Treponema denticola
Author(s) -
Kokubu E,
Inoue T,
Ishihara K
Publication year - 2018
Publication title -
oral diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.953
H-Index - 87
eISSN - 1601-0825
pISSN - 1354-523X
DOI - 10.1111/odi.12794
Subject(s) - treponema denticola , mutant , microbiology and biotechnology , virulence , biology , pathogen , wild type , chemistry , gene , bacteria , porphyromonas gingivalis , genetics
Objective In the gingival crevice, the interaction between epithelial cells and periodontopathic bacteria is important for the development of periodontitis. Treponema denticola is a major pathogen of chronic periodontitis and possesses several virulence factors, such as major surface protein (Msp) and prolyl‐phenylalanine‐specific protease (dentilisin). Here, we investigated the behaviours of epithelial cells infected with T. denticola by measuring the expression of interleukin ( IL )‐1β, IL ‐6, β defensin 2 ( BD ‐2) and heat‐shock protein 70 ( HSP 70). Methods Epithelial cells were infected with T. denticola wild‐type strain, Msp‐deficient mutant or dentilisin‐deficient mutant, and the expression levels of the above targets were analysed by polymerase chain reaction. Results Infection with T. denticola wild‐type strain and mutants induced the production of IL ‐6 and HSP 70. The level of BD ‐2 induced by T. denticola wild‐type strain at 24 hr was significantly higher than that of the dentilisin‐deficient mutant. The level of IL ‐1 β mRNA in the wild‐type strain and dentilisin‐deficient mutant was slightly lower than that in the uninfected control. Conclusion These results suggest that the levels of BD ‐2 were affected by Msp and dentilisin. This effect may contribute to the disruption of the response of epithelial cells to eradicate T. denticola .