In vivo expression of proteases and protease inhibitor, a serpin, by periodontal pathogens at teeth and implants
Abstract
Porphyromonas gingivalis and Tannerella forsythia secrete proteases, gingipains and KLIKK-proteases. In addition, T. forsythia produces a serpin (miropin) with broad inhibitory spectrum. The aim of this pilot study was to determine the level of expression of miropin and individual proteases in vivo in periodontal and peri-implant health and disease conditions. Biofilm and gingival crevicular fluid (GCF)/ peri-implant sulcular fluid (PISF) samples were taken from healthy tooth and implant sites (n = 10), gingivitis and mucositis sites (n = 12), and periodontitis and peri-implantitis sites (n = 10). Concentration of interleukin-8 (IL-8), IL-1β and IL-10 in GCF was determined by enzyme-linked immunosorbent assay. Loads of P. gingivalis and T. forsythia and the presence of proteases and miropin genes were assessed in biofilm by quantitative PCR, whereas gene expression was estimated by quantitative RT-PCR. The presence of P. gingivalis and T. forsythia, as well as the level of IL-8 and IL-1β, were associated with disease severity in the periodontal and peri-implant tissues. In biofilm samples harboring T. forsythia, genes encoding proteases were found to be present at 72.4% for karilysin and 100% for other KLIKK-protease genes and ...Continue Reading
References
Proteolytic inactivation of LL-37 by karilysin, a novel virulence mechanism of Tannerella forsythia.
Reversibility of experimental peri-implant mucositis compared with experimental gingivitis in humans
A Metalloproteinase Mirolysin of Tannerella forsythia Inhibits All Pathways of the Complement System
Gingipain-dependent augmentation by Porphyromonas gingivalis of phagocytosis of Tannerella forsythia
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