title: Treponema denticola induces interleukin-8 and macrophage chemoattractant protein 1 production in human umbilical vein epithelial cells.
abstract: Treponema denticola, a major pathogen of periodontitis, has also been detected in the lesions of atherosclerosis. The aim of this study was to investigate induction of chemokine production in human umbilical vein endothelial cells (HUVECs) by T. denticola and determine whether those chemokines were degraded by a protease, dentilisin. T. denticola ATCC35405 or dentilisin-deficient mutant K1 were added to HUVECs and levels of interleukin-8 (IL-8) and monocyte chemoattractant protein-1 (MCP-1) in the culture supernatants were determined by enzyme-linked immunosorbent assay. T. denticola ATCC35405 induced production of IL-8 in a time-dependent manner, with both production of IL-8 and expression of IL-8 mRNA showing higher levels than with exposure to dentilisin-deficient mutant K1. Although exposure to ATCC35405 induced expression of MCP-1 mRNA in the HUVECs, MCP-1 levels were remained similar to that in unstimulated cells. IL-8 and MCP-1 showed partial hydrolysis with exposure to T. denticola ATCC35405, but not with T. denticola K1. These results suggest that T. denticola can evade host defense mechanisms by modulating production of IL-8 and MCP-1, and that this play a role in the development of chronic infections such as periodontitis. The association of T. denticola infection to atherosclerosis was also discussed based on the present study.
authors.affiliation: Department of Periodontology, Tokyo Dental College, 1-2-2 Masago, Mihama-ku, Chiba 261-8502, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Okuda
authors.forename: Ryuta
authors.initials: R
authors.lastname: Kimizuka
authors.forename: Meguru
authors.initials: M
authors.lastname: Miyamoto
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Kato
authors.forename: Satoru
authors.initials: S
authors.lastname: Yamada
authors.forename: Katsuji
authors.initials: K
authors.lastname: Okuda
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Ishihara
mesh_terms: D001426:Bacterial Proteins; D018932:Chemokine CCL2 / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D002918:Chymotrypsin / Q000378:metabolism; D042783:Endothelial Cells / Q000276:immunology / Q000382:microbiology; D004847:Epithelial Cells / Q000276:immunology / Q000382:microbiology; D006801:Humans; D016209:Interleukin-8 / Q000096:biosynthesis* / Q000235:genetics / Q000276:immunology; D010447:Peptide Hydrolases; D010518:Periodontitis / Q000276:immunology* / Q000382:microbiology; D012313:RNA / Q000737:chemistry / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D048373:Treponema denticola / Q000201:enzymology / Q000276:immunology*; D014471:Umbilical Veins / Q000166:cytology
chemical_list: D001426:Bacterial Proteins; D018932:Chemokine CCL2; D016209:Interleukin-8; D012313:RNA; D010447:Peptide Hydrolases; C102570:dentilisin; D002918:Chymotrypsin