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Cancers 2013, 5(2), 334-356; doi:10.3390/cancers5020334

Global Decrease of Histone H3K27 Acetylation in ZEB1-Induced Epithelial to Mesenchymal Transition in Lung Cancer Cells

1,2,* , 1
1 Department of Medicine, Hematology Oncology Division, MUSC, 96 Jonathan Lucas St., Charleston, SC 29425, USA 2 CNRS FRE 3511, University of Poitiers, 1 rue Georges Bonnet, F-86022 Poitiers Cédex, France 3 Department of Medicine, Nephrology Division, MUSC, Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC 29425, USA 4 Epigénétique & Destin Cellulaire, CNRS UMR 7216, University of Paris Diderot, Sorbonne Paris Cité, F-75013 Paris, France 5 CU DNA Sequencing and Analysis Core, University of Colorado, School of Medicine, Anschutz Medical Campus, 12801 E. 17th Ave., Aurora, CO 80045, USA 6 INSERM, CIC 0802, CHU de Poitiers, F-86021 France
* Author to whom correspondence should be addressed.
Received: 5 February 2013 / Revised: 23 March 2013 / Accepted: 26 March 2013 / Published: 3 April 2013
(This article belongs to the Special Issue Cancer Epigenetics)
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The epithelial to mesenchymal transition (EMT) enables epithelial cells with a migratory mesenchymal phenotype. It is activated in cancer cells and is involved in invasion, metastasis and stem-like properties. ZEB1, an E-box binding transcription factor, is a major suppressor of epithelial genes in lung cancer. In the present study, we show that in H358 non-small cell lung cancer cells, ZEB1 downregulates EpCAM (coding for an epithelial cell adhesion molecule), ESRP1 (epithelial splicing regulatory protein), ST14 (a membrane associated serine protease involved in HGF processing) and RAB25 (a small G-protein) by direct binding to these genes. Following ZEB1 induction, acetylation of histone H4 and histone H3 on lysine 9 (H3K9) and 27 (H3K27) was decreased on ZEB1 binding sites on these genes as demonstrated by chromatin immunoprecipitation. Of note, decreased H3K27 acetylation could be also detected by western blot and immunocytochemistry in ZEB1 induced cells. In lung cancers, H3K27 acetylation level was higher in the tumor compartment than in the corresponding stroma where ZEB1 was more often expressed. Since HDAC and DNA methylation inhibitors increased expression of ZEB1 target genes, targeting these epigenetic modifications would be expected to reduce metastasis.
Keywords: EMT; ZEB1; lung cancer; histone acetylation; RAB25 EMT; ZEB1; lung cancer; histone acetylation; RAB25
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Roche, J.; Nasarre, P.; Gemmill, R.; Baldys, A.; Pontis, J.; Korch, C.; Guilhot, J.; Ait-Si-Ali, S.; Drabkin, H. Global Decrease of Histone H3K27 Acetylation in ZEB1-Induced Epithelial to Mesenchymal Transition in Lung Cancer Cells. Cancers 2013, 5, 334-356.

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