IgE and IL-4 levels in the blood of IL-15 overexpressed mice were measured by ELISA analysis (A, B). Analysis of B cells and activated B cells in the esophagus of IL-15 transgenic DOX and No-DOX exposed mice was performed by flow cytometry analyses using fluorochrome conjugated anti-CD45-APC-Cy7, anti-B220-PE-Cy7, anti-CD69-PE and respective matched isotype controls antibodies (C). The absolute and activated B cells from 3 independent experiments are shown (D, E). Further, we also examined whether IL-15-induced B cell activation is independent to IL-4; therefore, the spleenocytes of WT mice B cells were cultured in the presence of various concentrations of IL- 15 and IL-4. The activation of B cells was analyzed by flow cytometer (F). Data are expressed as mean ± SD, n = 6 mice/group. Data are expressed as mean ± SD, n = 10 mice/group, p<0.05, p<0.01, p<0.006.