MISC

2005年2月

Expression of major histocompatibility complex class II and CD80 by gingival epithelial cells induces activation of CD4(+) T cells in response to bacterial challenge

INFECTION AND IMMUNITY
  • T Matsuyama
  • ,
  • T Kawai
  • ,
  • Y Izumi
  • ,
  • MA Taubman

73
2
開始ページ
1044
終了ページ
1051
記述言語
英語
掲載種別
DOI
10.1128/IAI.73.2.1044-1051.2005
出版者・発行元
AMER SOC MICROBIOLOGY

HLA-DR (major histocompatibility complex [MHC] class II) is often expressed by epithelial cells in gingival tissues with periodontal disease but not by cells in healthy gingival tissues. Confocal microscopic analyses revealed that gingival epithelial cells (GEC) from tissue with periodontal disease express both HLA-DR and B7-1 (CD80) costimulatory molecules. Rat GEC lines were established to elucidate the possible role of MHC class H and B7-1 expression by GEC. Stimulation of a rat GEC line with gamma interferon (IFN-gamma) induced the expression of MHC class II, whereas the cell line constitutively expressed B7-1 costimulatory molecules as determined by reverse transcription-PCR and flow cytometry. Actinobacillus actinomycetemcomitans Omp29-specific CD4(+) Th1 clone cells proliferated in response to pretreatment of GEC with fixed A. actinomycetemcomitans and IFN-gamma. However, the Th1 cells did not respond to pretreatment of GEC with the bacteria alone or IFN-gamma alone. The activation of Th1 clone cells induced by the GEC was inhibited by antibody to MHC class H or by CTLA4 immunoglobulin (CTLA4-Ig). Lymph node T cells did not demonstrate superantigen activity to A. actinomycetemcomitans, although both lymph node T cells and Th1 clone cells were sensitive to superantigen activity of staphylococcal enterotoxin A as cultured in the presence of IFN-gamma-treated GEC. These results suggested that GEC can take up bacterial antigen and consequently process and present the bacterial antigen to CD4(+) T cells by MHC class II in conjunction with B7 costimulation. GEC appeared to play a role in the adaptive immune response by stimulating antigen-specific CD4(+) T cells.

Web of Science ® 被引用回数 : 19

リンク情報
DOI
https://doi.org/10.1128/IAI.73.2.1044-1051.2005
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000226731700045&DestApp=WOS_CPL

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