The role of thymic stromal lymphopoietin in CD8+ T cell homeostasis.

The role of thymic stromal lymphopoietin in CD8+ T cell homeostasis.
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DOI:
10.4049/jimmunol.181.11.7699
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发表时间:
2008-12-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Leonard WJ
Leonard WJ
中科院分区:
其他
文献类型:
--
作者:
Rochman Y;Leonard WJ

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胸腺基质淋巴生成素是一种由基质细胞、上皮细胞和嗜碱性细胞产生的细胞因子,作用于树突状细胞、肥大细胞和CD4+ T细胞。TSLP受体包含一条TSLP特异性受体链(TSLPR)和IL-7受体α链。尽管IL-7对幼稚和记忆性CD8+ T细胞的扩增和存活起着关键的控制作用,但TSLP对CD8+ T细胞的作用尚未报道。我们现在证明CD8+ T细胞表达TSLP受体,TSLP激活Stat5和Akt并诱导这些细胞中的Bcl-2。相应地,TSLP增加了CD8+ T细胞在体外以及WT和T-耗尽小鼠体内的存活,而不改变这些细胞的稳态增殖。此外,即使在缺乏IL-7的情况下,TSLP也能维持CD8+ T细胞。因此,我们的数据显示,在正常和淋巴细胞减少的情况下,TSLP有助于CD8+ T细胞的稳态。
Thymic stromal lymphopoietin is a cytokine produced by stromal cells, epithelial cells, and basophils that acts on dendritic cells, mast cells, and CD4+ T cells. The receptor for TSLP contains a TSLP-specific receptor chain (TSLPR) and the IL-7 receptor α chain. Although IL-7 critically controls the expansion and survival of naive and memory CD8+ T cells, an action for TSLP on CD8+ T cells has not been reported. We now demonstrate that CD8+ T cells express TSLP receptors and that TSLP activates both Stat5 and Akt and induces Bcl-2 in these cells. Correspondingly, TSLP increases CD8+ T cell survival in vitro as well as in WT and T-depleted mice in vivo, without altering the homeostatic proliferation of these cells. Moreover, TSLP can maintain CD8+ T cells even in the absence of IL-7. Thus, our data reveal that TSLP contributes to CD8+ T cell homeostasis in both normal and lymphopenic conditions.
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