• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Periodontal disease pathogenic bacterium Porphyromonas gingivalis invasion is able to induce the expression of inflammatory cytokines.

Research Project

Project/Area Number 14571748
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Morphological basic dentistry
Research InstitutionMeikai University

Principal Investigator

TAKESHITA Akira  Meikai University, School of Dentistry, assistant professor, 歯学部, 講師 (70236454)

Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2003: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2002: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsP.gingivalis / IL-6 / Periodontal disease / Oral epithelial cell / Cytokine / Invasion / Osteoblast / ODF / RANKL / P. gingivalis / 上皮細胞内侵入 / invasion / 炎症
Research Abstract

Porphyromonas gingivalis (P.gingivalis) adherence and invasion to human epithelial cell line KB cells markedly were eliminated by inhibition of the bacterial adherence through pretreatment of antiserum for P.gingivalis major (41kDa)-fimbriae. In this study, we showed that antiserum for the bacterial miner (67kDa)-fimbriae completely blocked the bacterial invasion but not its adherence. On the other hand, we observed that P.gingivalis is able to stimulate expression of IL-6 gene in KB cells. This stimulatory action was eliminated by pretreatment of anti-4lkDa-fimbriae antiserum, nevertheless, the fimbriae are not able to stimulate IL-6 gene expression. Interestingly, we observed that this cytokine stimulation is completely inhibited by pretreatment of antiserum for 67kDa-fimbriae. In addition, the stimulatory action was observed under condition of antibacterial protection assay (invasion assay). Moreover P.gingivalis-stimulated the cytokine expression is significantly inhibited by pretreatment of invasion inhibitors such as MDC, ouabain, colchicine, nocodazole, and cytochalacine D. We suggest here that P.gingivalis invasion is mediated by combination of two types fimbriae and may function as a virulence mechanizm in periodontal disease through expression of inflammatory cytokine. And I observed that MAP kinase p38 inhibitor SB202190 is able to completely block the bacteria-induced IL-6in the cells. Therefore, P.gingivalis invasion is able to induce IL-6 gene expression through activation of p38 in the cells. Moreover I observed that the bacteria induce the gen expression of ODF/RANKL in osteoblastic cell line MC3T3-E1 cells.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Takeshita, A.: "1α25(OH)_2D_3 interferes with retinoic acid-induced inhibition of c-fos gene expression for AP-1 formation in osteoblastic cells"J.Oral Science. 44・1. 27-34 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 安田寛仁: "リポ多糖は骨芽細胞のCD14をレセプターとし転写因子AP-1を介して単球走化性因子JE/MCP-1の発現を誘導する"明海大学歯学雑誌. 32・1. 29-40 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Takeshita A., Yasuda H., et al.: "1α25(OH)_2D_3 interferes with retinoic acid-induced inhibition of c-fos gene expression for AP-1 formation in osteoblastic cells."J.Oral Science.. 44-1. 27-34 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yasuda H., Takeshita A.: "Lipopolysaccharide induces AP-1-mediated expression of monocyte chemoattractant JE/MCP-1 in osteoblastic cells via CD14."Meikai Univ. Dent. J.. 32-1. 29-40 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 安田寛仁: "リボ多糖は骨芽細胞のCD14をレセプターとし転写因子AP-1を介して単球走化性因子JE/MCP-1の発現を誘導する"明海大学歯学雑誌. 32・1. 29-40 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Akira Takeshita: "1α25(OH)_2D_3 interferes with retinoic acid-induced inhibition of c-fos gene expression for AP-1 formation in osteoblastic cells"J. Oral Science. 44・1. 27-34 (2002)

    • Related Report
      2002 Annual Research Report

URL: 

Published: 2002-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi