Lactate Metabolism in Human Lung Tumors.

Lactate Metabolism in Human Lung Tumors.
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DOI:
10.1016/j.cell.2017.09.019
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发表时间:
2017-10-05
期刊:
影响因子:
64.5
通讯作者:
DeBerardinis RJ
DeBerardinis RJ
中科院分区:
生物学1区
文献类型:
--
作者:
Faubert B;Li KY;Cai L;Hensley CT;Kim J;Zacharias LG;Yang C;Do QN;Doucette S;Burguete D;Li H;Huet G;Yuan Q;Wigal T;Butt Y;Ni M;Torrealba J;Oliver D;Lenkinski RE;Malloy CR;Wachsmann JW;Young JD;Kernstine K;DeBerardinis RJ

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Cancer cells consume glucose and secrete lactate in culture. It is unknown whether lactate contributes to energy metabolism in living tumors. We previously reported that human non-small cell lung cancers (NSCLC) oxidize glucose in the tricarboxylic acid (TCA) cycle. Here we show that lactate is also a TCA cycle carbon source for NSCLC. In human NSCLC, evidence of lactate utilization was most apparent in tumors with high 18fluorodeoxyglucose uptake and aggressive oncological behavior. Infusing human NSCLC patients with 13C-lactate revealed extensive labeling of TCA cycle metabolites. In mice, deleting monocarboxylate transporter-1 (MCT1) from tumor cells eliminated lactate-dependent metabolite labeling, confirming tumor-cell autonomous lactate uptake. Strikingly, directly comparing lactate and glucose metabolism in vivo indicated that lactate's contribution to the TCA cycle predominates. The data indicate that tumors, including bona fide human NSCLC, can use lactate as a fuel in vivo. Human non-small cell lung cancer preferentially utilizes lactate over glucose to fuel TCA cycle and sustain tumor metabolism in vivo.
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