AMPK is a negative regulator of the Warburg effect and suppresses tumor growth in vivo.

AMPK is a negative regulator of the Warburg effect and suppresses tumor growth in vivo.
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DOI:
10.1016/j.cmet.2012.12.001
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发表时间:
2013-01-08
期刊:
影响因子:
29
通讯作者:
Jones RG
Jones RG
中科院分区:
生物学1区
文献类型:
--
作者:
Faubert B;Boily G;Izreig S;Griss T;Samborska B;Dong Z;Dupuy F;Chambers C;Fuerth BJ;Viollet B;Mamer OA;Avizonis D;DeBerardinis RJ;Siegel PM;Jones RG

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AMPK是一种代谢传感器,有助于维持细胞能量稳态。尽管有证据表明AMPK与肿瘤抑制功能有关,但AMPK在肿瘤发生和肿瘤代谢中的作用尚不清楚。在这里,我们发现AMPK负调控癌细胞中的有氧糖酵解(Warburg效应),并在体内抑制肿瘤生长。AMPK α1催化亚基的基因消融加速了myc诱导的淋巴瘤发生。转化细胞和非转化细胞中AMPKα的失活促进代谢向有氧糖酵解的转变,增加葡萄糖碳分配到脂质和生物量积累。这些代谢作用需要缺氧诱导因子-1α (HIF-1α)的常氧稳定,因为沉默HIF-1α逆转了向有氧糖酵解的转变,以及减少AMPKα信号所带来的生物合成和增殖优势。综上所述,我们的研究结果表明,AMPK活性可以抑制肿瘤的发展,其缺失在一定程度上通过调节支持细胞生长和增殖的细胞代谢途径来促进肿瘤的进展。
AMPK is a metabolic sensor that helps maintain cellular energy homeostasis. Despite evidence linking AMPK with tumor suppressor functions, the role of AMPK in tumorigenesis and tumor metabolism is unknown. Here we show that AMPK negatively regulates aerobic glycolysis (the Warburg effect) in cancer cells, and suppresses tumor growth in vivo. Genetic ablation of the α1 catalytic subunit of AMPK accelerates Myc-induced lymphomagenesis. Inactivation of AMPKα in both transformed and non-transformed cells promotes a metabolic shift to aerobic glycolysis, increased allocation of glucose carbon into lipids, and biomass accumulation. These metabolic effects require normoxic stabilization of the hypoxia-inducible factor-1α (HIF-1α), as silencing HIF-1α reverses the shift to aerobic glycolysis and the biosynthetic and proliferative advantages conferred by reduced AMPKα signaling. Together our findings suggest that AMPK activity opposes tumor development, and its loss fosters tumor progression in part by regulating cellular metabolic pathways that support cell growth and proliferation.
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