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• W2162440897 abstract "Abstract Background The Ets-1 proto-oncogene is frequently upregulated in cancer cells, with known involvement in cancer angiogenesis, metastasis, and more recently energy metabolism. In this study we have performed various bioinformatic analyses on existing microarray data to further clarify the role of Ets-1 in ovarian cancer, and validated these results with functional assays. Methods Functional pathway analyses were conducted on existing microarray data comparing 2008 and 2008-Ets1 ovarian cancer cells. Methods included over-representation analysis, functional class scoring and pathway topology, and network representations were visualized in Cytoscape. Oxidative stress regulation was examined in ovarian cancer cells by measuring protein expression and enzyme activity of glutathione peroxidases, as well as intracellular reactive oxygen species using dichlorofluorescin fluorescence. A stable Ets-1 knockdown MDA-MB-231 cell line was created using short hairpin RNA, and glycolytic dependence of these cells was measured following treatment with 2-deoxy-D-glucose and Hoechst nuclear staining to determine cell number. High-resolution respirometry was performed to measure changes in basal oxygen flux between MDA-MB-231 cells and MDA-Ets1KD variants. Results Enrichments in oxidoreductase activity and various metabolic pathways were observed upon integration of the different analyses, suggesting that Ets-1 is important in their regulation. As oxidative stress is closely associated with these pathways, we functionally validated our observations by showing that Ets-1 overexpression resulted in decreased reactive oxygen species with increased glutathione peroxidase expression and activity, thereby regulating cellular oxidative stress. To extend our findings to another cancer type, we developed an Ets-1 knockdown breast cancer cell model, which displayed decreased glycolytic dependence and increased oxygen consumption following Ets-1 knockdown confirming our earlier findings. Conclusions Collectively, this study confirms the important role of Ets-1 in the regulation of cancer energy metabolism in ovarian and breast cancers. Furthermore, Ets-1 is a key regulator of oxidative stress in ovarian cancer cells by mediating alterations in glutathione antioxidant capacity." @default.
• W2162440897 created "2016-06-24" @default.
• W2162440897 creator A5048880303 @default.
• W2162440897 creator A5070058721 @default.
• W2162440897 creator A5076470375 @default.
• W2162440897 date "2013-07-25" @default.
• W2162440897 modified "2023-10-16" @default.
• W2162440897 title "Ets-1 global gene expression profile reveals associations with metabolism and oxidative stress in ovarian and breast cancers" @default.
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• W2162440897 doi "https://doi.org/10.1186/2049-3002-1-17" @default.
• W2162440897 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4178218" @default.
• W2162440897 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24280356" @default.
• W2162440897 hasPublicationYear "2013" @default.
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