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    • 1. 发明申请
    • T cell anergy is reversed by active Ras and regulated by diacylglycerol kinase
    • T细胞无反应通过活性Ras逆转并受二酰基甘油激酶调控
    • US20050266510A1
    • 2005-12-01
    • US11032516
    • 2005-01-10
    • Thomas Gajewski
    • Thomas Gajewski
    • C12Q1/48G01N33/50
    • G01N33/505C12Q1/485
    • T cell anergy has been correlated with defective Ras signaling. However, neither a causal relationship nor the mechanism of Ras hypoactivation have been established. Using adenoviral transduction of CAR Tg T cells to enable genetic manipulation in nonproliferating cells, we show that Ras61L restores IL-2 production and MAP kinase signaling in T cells anergized in vitro or in vivo. A gene array screen revealed upregulated diacylglycerol kinase (DGK) in the anergic state, which was confirmed by RT-PCR and Western blot analysis. A DGK inhibitor significantly restored IL-2 production by anergic cells. Our data support a causal role for DGK and defective Ras signaling in T cell anergy.
    • T细胞无反应与缺陷型Ras信号传导相关。 然而,既没有建立起因果关系,也没有建立Ras hypoactivation的机制。 使用CAR Tg T细胞的腺病毒转导使得在非增殖细胞中能够进行遗传操作,我们显示Ras61L在体外或体内释放的T细胞中恢复IL-2产生和MAP激酶信号传导。 基因阵列屏幕显示在无能状态下上调二酰基甘油激酶(DGK),其通过RT-PCR和Western印迹分析证实。 DGK抑制剂显着恢复了无细胞的IL-2产生。 我们的数据支持DGK和T细胞无反应性缺陷Ras信号传导的因果作用。