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Title: Generation of gingival T cell lines/clones specific with Porphyromonas gingivalis pulsed dendritic cells from periodontitis patients
Authors: Nuntana Aroonrerk
Sathit Pichyangkul
Kosol Yongvanitchit
Mahisorn Wisetchang
Noppadol Sa-Ard-lam
Stitaya Sirisinha
Rangsini Mahanonda
Mahidol University
Armed Forces Research Institute of Medical Sciences, Thailand
Faculty of Medicine, Siriraj Hospital, Mahidol University
Chulalongkorn University
Keywords: Dentistry
Issue Date: 1-Jan-2003
Citation: Journal of Periodontal Research. Vol.38, No.3 (2003), 262-268
Abstract: Objectives and background: It is well documented that in periodontitis lesions, most infiltrated gingival T cells are antigen-specific memory T cells. These cells play an important role as regulators and effector cells in the pathogenesis of periodontitis. In this study, we used dendritic cells (DCs) as antigen-presenting cells to generate human gingival T cell lines and clones specific for Porphyromonas gingivalis from periodontitis patients. Methods: Autologous DCs were derived from the patients' adherent monocytes using granulocyte-macrophage colony-stimulating factor and interleukin (IL)-4. Lymphocytes were isolated from gingival biopsies using collagenase enzyme digestion and the number was increased by subsequent culturing in IL-2-containing medium. T cells were then negatively sorted using flow cytometry, cocultured with P. gingivalis-pulsed DCs and subsequently expanded in the culture medium containing IL-2. T cells were kept viable and active by periodic exposure to antigen-pulsed DCs. The specificity of the T cell lines was tested against four plaque bacteria: P. gingivalis, Actinobacillus actinomycetemcomitans, Prevotella intermedia and Actinomyces viscosus. The established T cell lines were then cloned. Three P. gingivalis-specific T cell lines and 12 gingival T cell clones were generated. They all showed good specificity against P. gingivalis but not to other plaque bacteria. Results: All T cell clones were positive for CD4 and the majority of them produced interferon gamma, but a minimal or negligible amount of IL-5. Conclusions: The data obtained clearly showed that monocyte-derived DCs could be used as powerful antigen-presenting cells to generate antigen-specific T cells from periodontitis tissues.
ISSN: 00223484
Appears in Collections:Scopus 2001-2005

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