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ROS homeostasis and metabolism: a dangerous liason in cancer cells.

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TLDR
How the mitochondria has a key role in regulating the interplay between redox homeostasis and metabolism within tumor cells is described, and the potential therapeutic use of agents that directly or indirectly block metabolism is discussed.
Abstract
Tumor cells harbor genetic alterations that promote a continuous and elevated production of reactive oxygen species. Whereas such oxidative stress conditions would be harmful to normal cells, they facilitate tumor growth in multiple ways by causing DNA damage and genomic instability, and ultimately, by reprogramming cancer cell metabolism. This review outlines the metabolic-dependent mechanisms that tumors engage in when faced with oxidative stress conditions that are critical for cancer progression by producing redox cofactors. In particular, we describe how the mitochondria has a key role in regulating the interplay between redox homeostasis and metabolism within tumor cells. Last, we will discuss the potential therapeutic use of agents that directly or indirectly block metabolism.

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Journal ArticleDOI

Reactive oxygen species (ROS) as pleiotropic physiological signalling agents.

TL;DR: This work focuses on ROS at physiological levels and their central role in redox signalling via different post-translational modifications, denoted as ‘oxidative eustress’.
Journal ArticleDOI

ROS signalling in the biology of cancer.

TL;DR: The generation and sources of ROS within tumour cells, the regulation of ROS by antioxidant defence systems, as well as the effect of elevated ROS production on their signalling targets in cancer are discussed.
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ROS in cancer therapy: the bright side of the moon

TL;DR: The review will emphasize the molecular mechanisms useful for the development of therapeutic strategies that are based on modulating ROS levels to treat cancer, and report on the growing data that highlight the role of ROS generated by different metabolic pathways as Trojan horses to eliminate cancer cells.
Journal ArticleDOI

Superoxide dismutases: Dual roles in controlling ROS damage and regulating ROS signaling.

TL;DR: Studies in model organisms and humans are discussed, which reveal the dual roles of SOD enzymes in controlling damage and regulating signaling and the need for fine local control of ROS signaling.
Journal ArticleDOI

ROS Generation and Antioxidant Defense Systems in Normal and Malignant Cells

TL;DR: This review covers the current data on the mechanisms of ROS generation and existing antioxidant systems balancing the redox state in mammalian cells that can also be related to tumors.
References
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Ischaemic accumulation of succinate controls reperfusion injury through mitochondrial ROS

TL;DR: It is shown that selective accumulation of the citric acid cycle intermediate succinate is a universal metabolic signature of ischaemia in a range of tissues and is responsible for mitochondrial ROS production during reperfusion, and a new pathway for metabolic control of ROS production in vivo is revealed.
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The Control of the Metabolic Switch in Cancers by Oncogenes and Tumor Suppressor Genes

TL;DR: The Warburg effect as discussed by the authors is a metabolic switch that places the emphasis on producing intermediates for cell growth and division, and it is regulated by both oncogenes and tumor suppressor genes in a number of key cancer-producing pathways.
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Reversible inactivation of the tumor suppressor PTEN by H2O2.

TL;DR: The results suggest that the reversible inactivation of PTEN by H2O2 might be important for the accumulation of 3′-phosphorylated phosphoinositides and that the uncontrolled generation of H 2O2 associated with certain pathological conditions might contribute to cell proliferation by inhibiting PTEN function.
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Glutamine and cancer: cell biology, physiology, and clinical opportunities.

TL;DR: The metabolic functions of glutamines as a super nutrient and the surprising roles of glutamine in supporting the biological hallmarks of malignancy are reviewed.
Journal ArticleDOI

The pentose phosphate pathway and cancer.

TL;DR: The PPP plays a pivotal role in helping glycolytic cancer cells to meet their anabolic demands and combat oxidative stress, and its importance in cancer cell metabolism and survival is summarized.
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