Author/Editor		Vardjan, Nina; Kopitar, Andreja Nataša; Ihan-Hren, Nataša; Malovrh, Tadej; Wraber, Branka; Ihan, Alojz
Title		Immune response in lymphocyte cultures stimulated by oral bacteria preparations
Type		članek
Source		Pflugers Arch
Vol. and No.		Letnik 440, št. 5 Suppl
Publication year		2000
Volume		str. R67-9
Language		eng
Abstract		Lymphocyte cultures were used as an in vitro experimental model to get a deeper insight into immune response to oral bacteria in periapical granulomas. Lymphocytes isolated from leucocyte concentrate were in lymphocyte cultures stimulated by antigen preparations of oral bacteria. Lymphocyte subsets that have developed in lymphocyte cultures after a week of stimulation were analysed by flow cytometry. A significant increase in expression of INF-gamma molecules in CD3+ cells stimulated by antigen preparations of oral streptococci was found, compared with negative control. On the other hand we observed a significant increase in expression of IL-4 in CD3+ cells stimulated by antigens of anaerobic bacteria, compared with negative control. Our results show that antigens of oral streptococci in in vitro lymphocyte cultures induce the differentiation of T helper cells into Th2 cells and that antigen preparations of anaerobic bacteria induce the differentiation of T helper cells into Th1 cells. Furthermore, an increased expression of HLA-DR molecules on CD8+ T cells stimulated by antigens of oral streptococci was found, compared with negative control.
Descriptors		LYMPHOCYTES STREPTOCOCCUS BACTEROIDES INTERFERON TYPE II INTERLEUKIN-4 FLOW CYTOMETRY ANTIGENS, BACTERIAL ANTIBODIES, MONOCLONAL ANTIGENS, CD3