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- W1581965845 abstract "Abstract Several studies indicate that CD4+ T cells, macrophages, and dendritic cells initially mediate intestinal inflammation in murine models of human inflammatory bowel disease. However, the initial role of B cells in the development of intestinal inflammation remains unclear. In this study we present evidence that B cells can trigger intestinal inflammation using transgenic (Tg) mice expressing CD40 ligand (CD40L) ectopically on B cells (CD40L/B Tg). We demonstrated that CD40L/B Tg mice spontaneously developed severe transmural intestinal inflammation in both colon and ileum at 8–15 wk of age. In contrast, CD40L/B Tg×CD40−/− double-mutant mice did not develop colitis, indicating the direct involvement of CD40-CD40L interaction in the development of intestinal inflammation. The inflammatory infiltrates consisted predominantly of massive aggregated, IgM-positive B cells. These mice were also characterized by the presence of anti-colon autoantibodies and elevated IFN-γ production. Furthermore, although mice transferred with CD4+ T cells alone or with both CD4+ T and B220+ B cells, but not B220+ cells alone, from diseased CD40L/B Tg mice, develop colitis, mice transferred with B220+ B cells from diseased CD40L/B Tg mice and CD4+ T cells from wild-type mice also develop colitis, indicating that the Tg B cells should be a trigger for this colitis model, whereas T cells are involved as effectors. As it has been demonstrated that CD40L is ectopically expressed on B cells in some autoimmune diseases, the present study suggests the possible contribution of B cells in triggering intestinal inflammation in human inflammatory bowel disease." @default.
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- W1581965845 date "2004-05-15" @default.
- W1581965845 modified "2023-10-14" @default.
- W1581965845 title "Ectopic CD40 Ligand Expression on B Cells Triggers Intestinal Inflammation" @default.
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- W1581965845 doi "https://doi.org/10.4049/jimmunol.172.10.6388" @default.
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