Int J Oral Biol.  2010 Sep;35(3):121-128.

Comparison of Cytokine Gene Induction in RAW 264.7 Cells by Porphyromonas gingivalis and Escherichia coli Lipopolysaccharide

• Lee YH
• Jeong SY
• Na HS
• Jeong SH
• Park HR
• Chung J

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-17beta, IL-2, Ccl4, Cxcl2 and TNFalpha 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-17beta and IL-2 were upregulated by Pg LPS but not by Ec LPS. These data indicate that Pg LPS stimulates the transcription of IL-17beta, IL-2, Ccl4, Cxcl2, LT-b, and TNFalpha, all of which may be involved in the pathogenesis of chronic periodontitis.

Keyword

Porphyromonas gingivalis; cytokine; gene expression; lipopolysaccharide

MeSH Terms

Animals
Chronic Periodontitis
Escherichia
Escherichia coli
Gene Expression
Interleukin-2
Macrophages
Mice
Microarray Analysis
Porphyromonas
Porphyromonas gingivalis
Real-Time Polymerase Chain Reaction
Transcriptome
Tumor Necrosis Factor-alpha
Interleukin-2
Tumor Necrosis Factor-alpha