International Journal of Oral Biology

The Korean Academy of Oral Biology (대한구강생물학회)
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Comparison of Cytokine Gene Induction in RAW 264.7 Cells by Porphyromonas gingivalis and Escherichia coli Lipopolysaccharide

  • Lee, Young-Hwa (Department of Oral Microbiology, School of Dentistry, Pusan National University) ;
  • Jeong, So-Yeon (Department of Oral Microbiology, School of Dentistry, Pusan National University) ;
  • Na, Hee-Sam (Department of Oral Microbiology, School of Dentistry, Pusan National University) ;
  • Jeong, Sung-Hee (Department of Oral Medicine, School of Dentistry, Pusan National University) ;
  • Park, Hae-Ryoun (Department of Oral Pathology, School of Dentistry, Pusan National University) ;
  • Chung, Jin (Department of Oral Microbiology, School of Dentistry, Pusan National University)
  • Received : 2010.09.01
  • Accepted : 2010.09.24
  • Published : 2010.09.30
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Abstract

Porphyromonas gingivalis lipopolysaccharide (Pg LPS) is an important virulence factor in chronic periodontitis. The aim of this study was to compare the expression of inflammatory cytokine genes in Escherichia coli LPS (Ec LPS) and Pg LPS-stimulated mouse macrophage RAW 264.7 cells. Cells were treated with Ec LPS and Pg LPS for 18 hours, and the cytokine gene expression profile was assessed using microarrays and confirmed by real-time PCR. Microarray analysis showed that both types of LPS induced a significant increase in the expression of IL-$17{\beta}$, IL-2, Ccl4, Cxcl2 and $TNF{\alpha}$ compared with the control. However, LT-b was up-regulated by Pg LPS but not by Ec LPS. Real-time PCR analysis of these genes showed similar results for LT-b, Ccl4, Cxcl2, and TNF-$\alpha$ but found that IL-$17{\beta}$ and IL-2 were upregulated by Pg LPS but not by Ec LPS. These data indicate that Pg LPS stimulates the transcription of IL-$17{\beta}$, IL-2, Ccl4, Cxcl2, LT-b, and $TNF{\alpha}$, all of which may be involved in the pathogenesis of chronic periodontitis.

Keywords

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