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Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep 2017 ; 19 (4): 875-89 Nephropedia Template TP
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Systematic Epigenomic Analysis Reveals Chromatin States Associated with Melanoma Progression #MMPMID28445736
Fiziev P; Akdemir KC; Miller JP; Keung EZ; Samant NS; Sharma S; Natale CA; Terranova CJ; Maitituoheti M; Amin SB; Martinez-Ledesma E; Dhamdhere M; Axelrad JB; Shah A; Cheng CS; Mahadeshwar H; Seth S; Barton MC; Propopotov A; Tsai KY; Davies MA; Garcia BA; Amit I; Chin L; Ernst J; Rai K
Cell Rep 2017[Apr]; 19 (4): 875-89 PMID28445736show ga
The extent and nature of epigenomic changes associated with melanoma progression is poorly understood. Through systematic epigenomic profiling of 35 epigenetic modifications and transcriptomic analysis, we define chromatin state changes associated with melanomagenesis using a cell phenotypic model of non-tumorigenic and tumorigenic states. Computation of specific chromatin state transitions showed loss of histone acetylations and H3K4me2/3 on regulatory regions proximal to specific cancer-regulatory genes in important melanoma-driving cell signaling pathways. Importantly, such acetylation changes were also observed between benign nevi and malignant melanoma human tissues. Intriguingly, only a small fraction of chromatin state transitions correlated with expected changes in gene expression patterns. Restoration of acetylation levels on deacetylated loci by HDAC inhibitors selectively blocked excessive proliferation in tumorigenic cells and human melanoma cells suggesting functional roles of observed chromatin state transitions in driving hyper-proliferative phenotype. Taken together, we define functionally relevant chromatin states associated with melanoma progression.