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- W1539296341 endingPage "4881" @default.
- W1539296341 startingPage "4873" @default.
- W1539296341 abstract "In this study, we investigated the effects of Ets2 expression on the proliferation, maturation, and survival of thymocytes by establishing transgenic mice that specifically express Ets2 or a dominant negative form of Ets2, Deltaets2, in the thymus. We show that, in young animals, there are fewer T cells in Deltaets2 transgenic thymi and that the maturation of these T cells is affected at the CD4(-)CD8(-) double-negative to CD4(+)CD8(+) double-positive transition compared with wild-type littermate mice. Partial recovery in the number of thymocytes and full T cell maturation are restored with increasing age of Deltaets2 transgenic animals. However, thymocytes from adult Deltaets2 transgenic mice cultured ex vivo are more sensitive to cell death and to glucocorticoid-induced apoptosis than are T cells from control littermate mice. We also show that T cells from adult ets2 transgenic mice proliferate faster than their wild-type littermates. The proliferation and survival of these T cells are clearly affected upon apoptotic signals: glucocorticoid-induced apoptosis induces T cells from ets2 transgenic mice to continue to proliferate in vivo and to survive better ex vivo than T cells from control littermates. It has been shown that c-Myc expression is required for thymic proliferation and improves thymocyte survival of dexamethasone-treated animals. We show that the expression of c-Myc, an Ets2 target, is elevated in T cells freshly isolated from thymi of ets2 transgenic mice pretreated with dexamethasone. Together, these results show that Ets2 plays a role in the proliferation and survival of thymocytes, implicating a Myc-dependent pathway." @default.
- W1539296341 created "2016-06-24" @default.
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- W1539296341 date "2002-11-01" @default.
- W1539296341 modified "2023-10-16" @default.
- W1539296341 title "The Role of the Ets2 Transcription Factor in the Proliferation, Maturation, and Survival of Mouse Thymocytes" @default.
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- W1539296341 doi "https://doi.org/10.4049/jimmunol.169.9.4873" @default.
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