Abstract:
:TP53 mutation (i.e., loss of normal-p53) may evoke epithelial-mesenchymal transition (EMT), which was previously attributed to loss of certain miRNAs. However, not all epithelial cells undergo EMT upon TP53 mutation, and the p53-miRNA axis may not fully explain p53 function in epithelial integrity. We here show two modes of epithelial integrity: one involves p53-binding to a nucleotide region and the other does not. In the former, p53 binds to the CDH1 (encoding E-cadherin) locus to antagonize EZH2-mediated H3K27 trimethylation (H3K27me3) to maintain high levels of acetylation of H3K27 (H3K27ac). In the latter, the same locus is not highly acetylated at H3K27, and does not allow p53-binding, nor needs to antagonize EZH2. We moreover demonstrated that although the CDH1 locus in the p53-independent cells, but not in fibroblasts, becomes high-H3K27ac by butyrate and allows p53-biniding, their CDH1 expression does not become dependent on p53. Our results identified novel modes of the epithelial integrity, in which the same epithelial-specific gene locus exhibits different requirement for p53 with different histone modifications among different epithelial cells to warrant its expression.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Oikawa T,Otsuka Y,Onodera Y,Horikawa M,Handa H,Hashimoto S,Suzuki Y,Sabe Hdoi
10.1038/s41598-018-20043-7subject
Has Abstractpub_date
2018-01-25 00:00:00pages
1595issue
1issn
2045-2322pii
10.1038/s41598-018-20043-7journal_volume
8pub_type
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