TY - JOUR A1 - Rafehi, Haloom A1 - Balcerczyk, Aneta A1 - Lunke, Sebastian A1 - Kaspi, Antony A1 - Ziemann, Mark A1 - KN, Harikrishnan A1 - Okabe, Jun A1 - Khurana, Ishant A1 - Ooi, Jenny A1 - Khan, Abdul Waheed A1 - Du, Xiao-Jun A1 - Chang, Lisa A1 - Haviv, Izhak A1 - Keating, Samuel T. A1 - Karagiannis, Tom C. A1 - El-Osta, Assam T1 - Vascular histone deacetylation by pharmacological HDAC inhibition Y1 - 2014/08/01 JF - Genome Research JO - Genome Research SP - 1271 EP - 1284 DO - 10.1101/gr.168781.113 VL - 24 IS - 8 UR - http://genome.cshlp.org/content/24/8/1271.abstract N2 - HDAC inhibitors can regulate gene expression by post-translational modification of histone as well as nonhistone proteins. Often studied at single loci, increased histone acetylation is the paradigmatic mechanism of action. However, little is known of the extent of genome-wide changes in cells stimulated by the hydroxamic acids, TSA and SAHA. In this article, we map vascular chromatin modifications including histone H3 acetylation of lysine 9 and 14 (H3K9/14ac) using chromatin immunoprecipitation (ChIP) coupled with massive parallel sequencing (ChIP-seq). Since acetylation-mediated gene expression is often associated with modification of other lysine residues, we also examined H3K4me3 and H3K9me3 as well as changes in CpG methylation (CpG-seq). RNA sequencing indicates the differential expression of ∼30% of genes, with almost equal numbers being up- and down-regulated. We observed broad deacetylation and gene expression changes conferred by TSA and SAHA mediated by the loss of EP300/CREBBP binding at multiple gene promoters. This study provides an important framework for HDAC inhibitor function in vascular biology and a comprehensive description of genome-wide deacetylation by pharmacological HDAC inhibition. ER -