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
中科院分区:
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
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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