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• W2031795384 startingPage "e7033" @default.
• W2031795384 abstract "The unique metabolism of tumors was described many years ago by Otto Warburg, who identified tumor cells with increased glycolysis and decreased mitochondrial activity. However, aerobic glycolysis generates fewer ATP per glucose molecule than mitochondrial oxidative phosphorylation, so in terms of energy production, it is unclear how increasing a less efficient process provides tumors with a growth advantage.We carried out a screen for loss of genetic elements in pancreatic tumor cells that accelerated their growth as tumors, and identified mitochondrial ribosomal protein L28 (MRPL28). Knockdown of MRPL28 in these cells decreased mitochondrial activity, and increased glycolysis, but paradoxically, decreased cellular growth in vitro. Following Warburg's observations, this mutation causes decreased mitochondrial function, compensatory increase in glycolysis and accelerated growth in vivo. Likewise, knockdown of either mitochondrial ribosomal protein L12 (MRPL12) or cytochrome oxidase had a similar effect. Conversely, expression of the mitochondrial uncoupling protein 1 (UCP1) increased oxygen consumption and decreased tumor growth. Finally, treatment of tumor bearing animals with dichloroacetate (DCA) increased pyruvate consumption in the mitochondria, increased total oxygen consumption, increased tumor hypoxia and slowed tumor growth.We interpret these findings to show that non-oncogenic genetic changes that alter mitochondrial metabolism can regulate tumor growth through modulation of the consumption of oxygen, which appears to be a rate limiting substrate for tumor proliferation." @default.
• W2031795384 created "2016-06-24" @default.
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• W2031795384 date "2009-09-15" @default.
• W2031795384 modified "2023-10-17" @default.
• W2031795384 title "Oxygen Consumption Can Regulate the Growth of Tumors, a New Perspective on the Warburg Effect" @default.
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• W2031795384 doi "https://doi.org/10.1371/journal.pone.0007033" @default.
• W2031795384 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2737639" @default.
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• W2031795384 hasPublicationYear "2009" @default.
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