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Intraepithelial lymphocytes (IELs) are resident cells localized within the intestinal epithelia and play an important role in regulating gut inflammations and host defense against pathogens. CD8α+ TCRαβ+ IELs are heterogeneous populations that are generated from T cell precursors including CD4− CD8α− double-negative (DN) cells and CD4+ CD8α+ double-positive (DP) cells. However, developmental pathways...
In contrast to thymic epithelial cells, which induce the positive selection of conventional CD8+ T cells, hematopoietic cells (HCs) select innate CD8+ T cells whose Ag specificity is not fully understood. Here we show that CD8+ T cells expressing an H‐Y Ag‐specific Tg TCR were able to develop in mice in which only HCs expressed MHC class I, when HCs also expressed the H‐Y Ag. These HC‐selected self‐specific...
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