Glutamine sensitivity analysis identifies the xCT antiporter as a common triple-negative breast tumor therapeutic target.

Glutamine sensitivity analysis identifies the xCT antiporter as a common triple-negative breast tumor therapeutic target.
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DOI:
10.1016/j.ccr.2013.08.020
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发表时间:
2013-10-14
期刊:
影响因子:
50.3
通讯作者:
Gray JW
Gray JW
中科院分区:
医学1区
文献类型:
--
作者:
Timmerman LA;Holton T;Yuneva M;Louie RJ;Padró M;Daemen A;Hu M;Chan DA;Ethier SP;van 't Veer LJ;Polyak K;McCormick F;Gray JW

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少数肿瘤源性细胞系形成了癌症治疗开发的支柱,产生的药物的影响通常以疾病进展的几个月来衡量。为了开发更有效的乳腺癌治疗方法并更容易理解其临床影响,我们构建了46个独立来源的乳腺细胞系的功能代谢图。我们对谷氨酰胺摄取和依赖性的分析确定了谷氨酰胺营养缺陷型三阴性样品的一个子集。环境谷氨酰胺通过xCT反向转运蛋白间接支持环境胱氨酸获取,该反向转运蛋白在体内1/3的三阴性肿瘤上表达。临床批准的抗炎药柳氮磺胺吡啶的xCT抑制作用可降低肿瘤生长,揭示了预后最差的乳腺肿瘤的治疗靶点,以及快速有效药物开发的先导化合物。
A handful of tumor-derived cell lines form the mainstay of cancer therapeutic development, yielding drugs with impact typically measured as months to disease progression. To develop more effective breast cancer therapeutics and more readily understand their clinical impact, we constructed a functional metabolic portrait of 46 independently-derived breast cell lines. Our analysis of glutamine uptake and dependence identified a subset of triple negative samples that are glutamine auxotrophs. Ambient glutamine indirectly supports environmental cystine acquisition via the xCT antiporter, which is expressed on 1/3 of triple negative tumors in vivo. xCT inhibition with the clinically approved anti-inflammatory Sulfasalazine decreases tumor growth revealing a therapeutic target in breast tumors of poorest prognosis, and a lead compound for rapid, effective drug development.
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