SIRT3 opposes reprogramming of cancer cell metabolism through HIF1α destabilization.

SIRT3 opposes reprogramming of cancer cell metabolism through HIF1α destabilization.
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DOI:
10.1016/j.ccr.2011.02.014
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发表时间:
2011-03-08
期刊:
影响因子:
50.3
通讯作者:
Haigis MC
Haigis MC
中科院分区:
医学1区
文献类型:
--
作者:
Finley LW;Carracedo A;Lee J;Souza A;Egia A;Zhang J;Teruya-Feldstein J;Moreira PI;Cardoso SM;Clish CB;Pandolfi PP;Haigis MC

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肿瘤细胞表现出异常代谢,其特征在于即使在氧气存在下也具有高糖酵解。这种被称为瓦尔堡效应的代谢重编程为肿瘤细胞提供了生物质生成所需的底物。在这里,我们表明,线粒体NAD依赖性脱乙酰酶SIRT 3是一个重要的调节器的瓦尔堡效应。从机制上讲,SIRT 3通过去稳定低氧诱导因子-1 α(HIF 1 α)介导代谢重编程,HIF 1 α是一种控制糖酵解基因表达的转录因子。SIRT 3的缺失增加了活性氧的产生,导致HIF 1 α的稳定。SIRT 3在人乳腺癌中的表达降低,其缺失与HIF 1 α靶基因的上调相关。最后,我们发现SIRT 3过表达抑制乳腺癌细胞的糖酵解和增殖,为肿瘤抑制提供了代谢机制。
Tumor cells exhibit aberrant metabolism characterized by high glycolysis even in the presence of oxygen. This metabolic reprogramming, known as the Warburg effect, provides tumor cells with the substrates required for biomass generation. Here, we show that the mitochondrial NAD-dependent deacetylase SIRT3 is a crucial regulator of the Warburg effect. Mechanistically, SIRT3 mediates metabolic reprogramming by destabilizing hypoxia-inducible factor-1α (HIF1α), a transcription factor that controls glycolytic gene expression. SIRT3 loss increases reactive oxygen species production, leading to HIF1α stabilization. SIRT3 expression is reduced in human breast cancers, and its loss correlates with the upregulation of HIF1α target genes. Finally, we find that SIRT3 overexpression represses glycolysis and proliferation in breast cancer cells, providing a metabolic mechanism for tumor suppression.
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