title: Gene expression analysis of the CD4+ T-cell clones derived from gingival tissues of periodontitis patients.
abstract: The function of T cells infiltrating periodontitis lesions is complex and has not been fully elucidated. Here, we established T-cell clones from the gingival tissues of periodontitis patients and examined their gene expression. A total of 57 and 101 T-cell clones were established by means of immobilized anti-CD3 antibody and IL-2 from gingival tissues and peripheral blood, respectively. The gingival T-cell clones were derived from three patients, and the peripheral blood T-cell clones from two of these patients and a further patient whose gingival T-cell clones were not established. Gingival tissues were also obtained from a further 19 periodontitis patients. The expression of cytokines and molecules related to both regulatory function and tissue destruction were examined by means of reverse-transcription polymerase chain reaction. All the gingival T-cell clones expressed mRNA for TGF-beta1, CTLA-4, and CD25, and all the T-cell clones from peripheral blood expressed IFN-gamma and TGF-beta1 mRNAs. Most but not all the T-cell clones from gingival tissues and peripheral blood expressed mRNA for IFN-gamma and, CD25 and CTLA-4, respectively. The frequency of T-cell clones and gingival tissues expressing FOXP3, a possible master gene for mouse CD4(+)CD25(+) regulatory T cells, was very high (97%, 93%, and 100% for gingival T-cell clones, peripheral blood T-cell clones, and gingival tissues, respectively). Whereas the frequency of IL-4-expressing T-cell clones was lower for gingival T-cell clones (70% vs. 87%), the frequency of the gingival T-cell clones expressing IL-10 and IL-17 was higher than peripheral blood T-cell clones (75% vs. 62% for IL-10, 51% vs. 11% for IL-17). A similar expression profile was observed for gingival T-cell clones compared with gingival tissue samples with the exception of IL-4 expression, where the frequency of positive samples was lower in the gingival tissues (70% vs. 11%). These results suggest that the individual T cells infiltrating gingival lesions can express mRNA for both Th1 and Th2 cytokines as well as regulatory cytokines simultaneously.
authors.affiliation: Laboratory of Periodontology and Immunology, Department of Oral Health and Welfare, Niigata University Faculty of Dentistry, Niigata, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ito
authors.forename: T
authors.initials: T
authors.lastname: Honda
authors.forename: H
authors.initials: H
authors.lastname: Domon
authors.forename: T
authors.initials: T
authors.lastname: Oda
authors.forename: T
authors.initials: T
authors.lastname: Okui
authors.forename: R
authors.initials: R
authors.lastname: Amanuma
authors.forename: T
authors.initials: T
authors.lastname: Nakajima
authors.forename: K
authors.initials: K
authors.lastname: Yamazaki
mesh_terms: D015703:Antigens, CD; D000943:Antigens, Differentiation / Q000032:analysis; D015704:CD4 Antigens / Q000032:analysis; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D060908:CTLA-4 Antigen; D002999:Clone Cells / Q000276:immunology; D051858:Forkhead Transcription Factors / Q000032:analysis; D015870:Gene Expression / Q000235:genetics*; D020869:Gene Expression Profiling; D005881:Gingiva / Q000276:immunology*; D006801:Humans; D007141:Immunoglobulin Fc Fragments / Q000032:analysis; D007371:Interferon-gamma / Q000032:analysis; D016753:Interleukin-10 / Q000032:analysis; D020381:Interleukin-17 / Q000032:analysis; D015847:Interleukin-4 / Q000032:analysis; D010518:Periodontitis / Q000276:immunology*; D015375:Receptors, Interleukin-2 / Q000032:analysis; D018417:Th1 Cells / Q000276:immunology; D018418:Th2 Cells / Q000276:immunology; D016212:Transforming Growth Factor beta / Q000032:analysis; D053773:Transforming Growth Factor beta1
chemical_list: D015703:Antigens, CD; D000943:Antigens, Differentiation; D015704:CD4 Antigens; D060908:CTLA-4 Antigen; C556706:CTLA4 protein, human; C556707:Ctla4 protein, mouse; C418974:FOXP3 protein, human; D051858:Forkhead Transcription Factors; D007141:Immunoglobulin Fc Fragments; D020381:Interleukin-17; D015375:Receptors, Interleukin-2; C508960:TGFB1 protein, human; C508961:Tgfb1 protein, mouse; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; D016753:Interleukin-10; D015847:Interleukin-4; D007371:Interferon-gamma