Tumor suppressor p53 and its mutants in cancer metabolism.

Tumor suppressor p53 and its mutants in cancer metabolism.
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DOI:
10.1016/j.canlet.2013.12.025
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发表时间:
2015-01-28
期刊:
影响因子:
9.7
通讯作者:
Feng, Zhaohui
Feng, Zhaohui
中科院分区:
医学1区
文献类型:
--
作者:
Liu, Juan;Zhang, Cen;Hu, Wenwei;Feng, Zhaohui

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肿瘤抑制因子p53在肿瘤预防中发挥着关键作用。作为转录因子,p53通过转录调节其靶基因来调节应激反应中的不同生物过程,包括细胞凋亡、细胞周期停滞或衰老,从而发挥其抑制肿瘤的功能。最近的研究表明,代谢调节是 p53 的一项新功能。代谢变化被认为是肿瘤的标志和肿瘤发展的关键因素。 p53调节代谢的许多不同方面,包括糖酵解、线粒体氧化磷酸化、磷酸戊糖途径、脂肪酸合成和氧化,以维持细胞代谢的稳态,这有助于p53在肿瘤抑制中的作用。 p53 在人类肿瘤中经常发生突变。除了肿瘤抑制功能的丧失之外,肿瘤相关的突变型 p53 蛋白通常还会获得新的致瘤活性,称为突变型 p53 的功能获得。最近的研究表明,突变型 p53 介导肿瘤中的代谢变化,作为促进肿瘤发展的新功能获得。本文综述了野生型和突变型p53在代谢调节中的功能和机制,并讨论了它们在肿瘤发生中的潜在作用。
Tumor-suppressor p53 plays a key role in tumor prevention. As a transcription factor, p53 transcriptionally regulates its target genes to regulate different biological processes in response to stress, including apoptosis, cell cycle arrest or senescence, to exert its function in tumor suppression. Recent studies have revealed that metabolic regulation is a novel function of p53. Metabolic changes have been regarded as a hallmark of tumors and a key contributor to tumor development. p53 regulates many different aspects of metabolism, including glycolysis, mitochondrial oxidative phosphorylation, pentose phosphate pathway, fatty acid synthesis and oxidation, to maintain the homeostasis of cellular metabolism, which contributes to the role of p53 in tumor suppression. p53 is frequently mutated in human tumors. In addition to loss of tumor suppressive function, tumor-associated mutant p53 proteins often gain new tumorigenic activities, termed gain-of-function of mutant p53. Recent studies have shown that mutant p53 mediates metabolic changes in tumors as a novel gain-of-function to promote tumor development. Here we review the functions and mechanisms of wild-type and mutant p53 in metabolic regulation, and discuss their potential roles in tumorigenesis.
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