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Title: Metabolic pathways regulated by TAp73 in response to oxidative stress
Authors: Agostini, Massimiliano
Annicchiarico-Petruzzelli, Margherita
Melino, Gerry
Rufini, Alessandro
First Published: 22-Apr-2016
Publisher: Impact Journals
Citation: Oncotarget, 2016, 7 (21), pp. 29881-29900
Abstract: Reactive oxygen species are involved in both physiological and pathological processes including neurodegeneration and cancer. Therefore, cells have developed scavenging mechanisms to maintain redox homeostasis under control. Tumor suppressor genes play a critical role in the regulation of antioxidant genes. Here, we investigated whether the tumor suppressor gene TAp73 is involved in the regulation of metabolic adaptations triggered in response to oxidative stress. H2O2 treatment resulted in numerous biochemical changes in both control and TAp73 knockout (TAp73-/-) mouse embryonic fibroblasts, however the extent of these changes was more pronounced in TAp73-/- cells when compared to control cells. In particular, loss of TAp73 led to alterations in glucose, nucleotide and amino acid metabolism. In addition, H2O2 treatment resulted in increased pentose phosphate pathway (PPP) activity in null mouse embryonic fibroblasts. Overall, our results suggest that in the absence of TAp73, H2O2 treatment results in an enhanced oxidative environment, and at the same time in an increased pro-anabolic phenotype. In conclusion, the metabolic profile observed reinforces the role of TAp73 as tumor suppressor and indicates that TAp73 exerts this function, at least partially, by regulation of cellular metabolism.
DOI Link: 10.18632/oncotarget.8935
eISSN: 1949-2553
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2016 Impact Journals, LLC. This is an open-access article distributed under the terms of the Creative Commons Attribution License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Cancer Studies and Molecular Medicine

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