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- W130392917 abstract "Application of Systems Biology approaches to energy metabolism of cancer cells help in the understanding of their controlling and regulatory mechanisms and identification of new drug targets. Our group built and validated a kinetic model of tumor glycolysis based on the experimental determination of all the enzyme/transporter kinetic parameters, metabolite concentrations, and fluxes in tumor cells. Model predictions enabled to understand how glycolysis is controlled and allowed identification of the main controlling steps which can be the most promising therapeutic targets. In this chapter, the model was extended to determine the contribution on the pathway function of the expression of different glycolytic isoforms displaying different catalytic properties, a feature commonly observed in tumor cells subjected to hypoxia. Model predictions now indicated that, by fully changing the glucose transporter (GLUT), hexokinase (HK), or both, from low- to high affinity isoforms, the glycolytic flux can be increased (GLUT+HK>GLUT>>HK); however, this concurred with a marked deregulation of the adenine nucleotides concentration. To gradually increase glycolytic flux with no alteration of adenine nucleotides homeostasis, which is closer to the physiological response of tumor cells, the model indicated that simultaneous expression in different ratios of GLUT and HK isoforms with different affinities should be accomplished. Mitochondrial metabolism is also active and essential for cancer cells. Therefore, a cancer energy metabolism model, including glycolysis and oxidative phosphorylation (Krebs cycle, respiratory chain, Pi/ADP transport, ATP synthase), should identify the most appropriate sites for successful multi-target therapies." @default.
- W130392917 created "2016-06-24" @default.
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- W130392917 date "2013-08-06" @default.
- W130392917 modified "2023-10-18" @default.
- W130392917 title "Systems Biology Approaches to Cancer Energy Metabolism" @default.
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- W130392917 doi "https://doi.org/10.1007/978-3-642-38505-6_9" @default.
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