Glucose deprivation inhibits multiple key gene expression events and effector functions in CD8+ T cells.

Glucose deprivation inhibits multiple key gene expression events and effector functions in CD8+ T cells.
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DOI:
10.1002/eji.200838289
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发表时间:
2008-09
影响因子:
5.4
通讯作者:
Gajewski, Thomas F.
Gajewski, Thomas F.
中科院分区:
医学3区
文献类型:
--
作者:
Cham, Candace M.;Driessens, Gregory;O'Keefe, James P.;Gajewski, Thomas F.

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我们最近报道,从初始状态到效应状态的CD8 + T细胞分化涉及葡萄糖依赖性代谢的上调。葡萄糖剥夺或2 - 脱氧 - D - 葡萄糖(2 - DG)对糖酵解的抑制选择性地抑制了干扰素 - γ的产生,但不抑制白细胞介素 - 2的产生。为了确定葡萄糖代谢对效应T细胞功能更全面的作用,我们对在有或无2 - DG存在下刺激的CD8 +效应T细胞进行了基因芯片分析。我们观察到,TCR/CD28信号诱导的基因中只有10%的基因表达受到2 - DG的抑制。其中包括关键细胞因子、细胞周期分子和细胞毒性颗粒蛋白的基因。与这些结果一致,干扰素 - γ和粒细胞 - 巨噬细胞集落刺激因子的产生、细胞周期进程、细胞周期蛋白D2蛋白的上调、细胞溶解活性、颗粒酶B蛋白的上调以及结合物的形成都高度依赖葡萄糖。与葡萄糖相反,CD8 +效应T细胞很少利用氧气,相对缺氧并不抑制这些细胞毒性T淋巴细胞(CTL)的功能特性。我们的结果表明,葡萄糖在调节CD8 + T细胞的特定效应功能方面具有特别关键的作用,并对在实体瘤等靶组织微环境中细胞免疫应答效应阶段的维持具有影响。
We recently reported that differentiation of CD8+ T cells from the naïve to the effector state involves the upregulation of glucose-dependent metabolism. Glucose deprivation or inhibition of glycolysis by 2-deoxy-D-glucose (2-DG) selectively inhibited production of IFN-γ but not of IL-2. To determine a more global role of glucose metabolism on effector T cell function, we performed gene array analysis on CD8+ effector T cells stimulated in the presence or absence of 2-DG. We observed that expression of only 10% of genes induced by TCR/CD28 signaling was inhibited by 2-DG. Among these were genes for key cytokines, cell cycle molecules, and cytotoxic granule proteins. Consistent with these results, production of IFN-γ and GM-CSF, cell cycle progression, upregulation of cyclin D2 protein, cytolytic activity, and upregulation of granzyme B protein but also conjugate formation were exquisitely glucose-dependent. In contrast to glucose, oxygen was little utilized by CD8+ effector T cells, and relative oxygen deprivation did not inhibit these CTL functional properties. Our results indicate a particularly critical role for glucose in regulating specific effector functions of CD8+ T cells, and have implications for the maintenance of the effector phase of cellular immune responses in target tissue microenvironments such as a solid tumor.
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