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http://dx.doi.org/10.5352/JLS.2007.17.11.1492

Induction of Rice Allergen-Specific IgE Synthesis by KU8l2 Cells  

Shim, Sun-Yup (Oriental Medicine Research & Development Institute, Pukyong National University)
Katakura, Yoshinori (Department of Genetic Resources Technology, Faculty of Agriculture, Kyushu University)
Shirahata, Sanetaka (Department of Genetic Resources Technology, Faculty of Agriculture, Kyushu University)
Publication Information
Journal of Life Science / v.17, no.11, 2007 , pp. 1492-1496 More about this Journal
Abstract
In vitro IgE class switching could be induced through co-culture of CD40L-expressing KU812 cells and CD40-expressing B cells in the presence of IL-4 or IL-13. It has been generated several B cell lines, which produce rice allergen (RA)-specific IgM antibody by in witγo immunization (IVI) using peripheral blood lymphocyte (PBL). In this study, induction of RA-specific IgE antibody by KU812 cells was attempted. Before co-culture, we determined the CD40 expression in RA-specific B cell lines, RA9G11 and the CD40 ligand (CD40L) expression in activated KU812 cells by treatments with phorbol myristate acetate (PMA) and ionomycin for 6 hrs. Flow cytometric analysis shown that RA9G11 and activated KU812 cells expressed high level of CD40 and CD40L, respectively. RA9G11 cells were cultured with activated KU812 cells for 12 days in the presence of IL-4 for IgE class switching. Mature $C{\varepsilon}$ mRNA level and RA-specific IgE spot forming cells (SFC) were observed in all culture condition, and especially, high level of RA-specific IgE synthesis was determined the same ratio of RA9G11 and activated KU812 cells in the presence of 50U IL-4. Therefore, induction of RA-specific IgE synthesis by activated KU812 cells can be contributed in the application for allergic therapy and prevention.
Keywords
IgE; rice allergen (RA); KU812; RA9G11;
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