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. 2017 Aug 29;7:9711. doi: 10.1038/s41598-017-09859-x

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The tumor suppressor p53 represses dihydropyrimidine dehydrogenase (DPYD) expression. (A) mRNA and protein expression of DPYD in HCT-116 p53 ^+/+ and HCT-116 p53 ^−/− cell lines at indicated times after 5-FU (384 μM) treatment. (B) Fold-expression of mRNA in A549 and H460 cell lines at 24 hr after 5-FU (384 μM) treatment with and without siRNA knockdown of p53 (P = 0.0011 N = 3). (C) H3K9 Acetylation at DPYD promoter following 5-FU treatment for indicated time points. Values are normalized in the sequence [input > IgG > total H3 > No Treatment (NT)] (N = 3). (D,E,F) Protein expression of DPYD in A549, U87MG, HT-1080 and H460 is shown after western blotting at the indicated time points with and without siRNA knockdown of p53. (G) H3K4me3 and H3K27me3 at DPYD promoter at 24hrs after 5-FU treatment. Values normalized in the sequence [input > IgG > total H3] (N = 3).