International Journal of Oral Biology

The Korean Academy of Oral Biology (대한구강생물학회)
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Ursodeoxycholic Acid Inhibits Inflammatory Cytokine Expression in THP-1 Cells Infected with Aggregatibacter actinomycetemcomitans

  • Song, YuRi (Department of Oral Microbiology, School of Dentistry, Pusan National University) ;
  • Kim, SeYeon (Department of Oral Microbiology, School of Dentistry, Pusan National University) ;
  • Park, Mee Hee (Department of Oral Microbiology, School of Dentistry, Pusan National University) ;
  • Na, Hee Sam (Department of Oral Microbiology, School of Dentistry, Pusan National University) ;
  • Chung, Jin (Department of Oral Microbiology, School of Dentistry, Pusan National University)
  • Received : 2017.02.21
  • Accepted : 2017.03.10
  • Published : 2017.03.31
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Abstract

Background: Periodontitis is an inflammatory disease characterized by the breakdown of tooth-supporting tissues, leading to tooth loss. Aggregatibacter actinomycetemcomitans are major etiologic bacterium causing aggressive periodontitis. Ursodeoxycholic acid (UDCA), a hydrophilic gall bladder acid, has been used as an effective drug for various diseases related to immunity. The aim of this study was to investigate the effect of UDCA on the inflammatory response induced by A. actinomycetemcomitans. Methods: A human acute monocytic leukemia cell line (THP-1) was differentiated to macrophage- like cells by treatment with phorbol 12-mystristate 13-acetate (PMA) and used for all experiments. The cytotoxic effect of UDCA was examined by MTT assay. THP-1 cells were pretreated with UDCA for 30 min before A. actinomycetemcomitans infection and the culture supernatant was analyzed for various cytokine production by ELISA. The effect of UDCA on bacterial growth was examined by measuring optical densities using a spectrophotometer. Results: UDCA showed no cytotoxic effect on THP-1 cells, up to $80{\mu}M$ Ed highlight: Please confirm technical meaning. UDCA pretreatment inhibited the A. actinomycetemcomitans-induced $IL-1{\beta}$, $TNF-{\alpha}$, and IL-17A secretion in a dose-dependent manner. UDCA also inhibited IL-21 production at $60{\mu}M$. The production of IL-12 and IL-4 was not influenced by A. actinomycetemcomitans infection. Conclusion: These findings indicate that UDCA inhibits the production of inflammatory cytokines involved in innate and Th17 immune responses in A. actinomycetemcomitans-infected THP-1- derived macrophages, which suggests its possible use for the control of aggressive periodontitis.

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References

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