Intragingival injection of Porphyromonas gingivalis-derived lipopolysaccharide induces a transient increase in gingival tumour necrosis factor-α, but not interleukin-6, in anaesthetised rats
Hiroko Taguchi , Yuri Aono , Takayuki Kawato , Masatake Asano , Noriyoshi Shimizu , Tadashi Saigusa
International Journal of Oral Science ›› 2015, Vol. 7 ›› Issue (3) : 155 -160.
Intragingival injection of Porphyromonas gingivalis-derived lipopolysaccharide induces a transient increase in gingival tumour necrosis factor-α, but not interleukin-6, in anaesthetised rats
A rat model offers insights into the bacterially-induced inflammatory response that contributes to the tissue damage in periodontal disease. Several studies have demonstrated that lipopolysaccharide (LPS), a component of the bacterial cell wall, can promote tissue damage in the gums. However, these experiments typically used LPS from bacteria not associated with periodontal disease. Researchers led by Tadashi Saigusa from Nihon University School of Dentistry in Matsudo, Japan, studied the effect of LPS from Porphyromonoas gingivalis, which is linked to periodontal disease, on rats. They identified a specific inflammatory signal that was activated by P.gingivalis, but not by LPS from another bacterial species that typically resides in the gut. These data highlight the importance of using appropriate bacterial species to model periodontal disease, and reveal molecular pathways that might contribute to this pathology.
Porphyromonas gingivalis / lipopolysaccharide / gingiva / tumour necrosis factor-α / microdialysis
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