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Homo sapiens

ABSTRACT: Mapping of ETV1 genomic binding sites in gastrointestinal stromal tumor (GIST).

PROVIDER: PRJNA129281 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR059820.fastq.gz	Fastqsanger.gz
	SRR059821.fastq.gz	Fastqsanger.gz

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Gastrointestinal stromal tumor GIST: gene expresssion and ChIP analyses

Project description:This SuperSeries is composed of the following subset Series: GSE19396: ETV1 knockdown in GIST cell lines GSE22433: Imatinib Treatment of GIST882 GSE22441: Mapping of ETV1 genomic binding sites in gastrointestinal stromal tumor (GIST). Refer to individual Series

2010-10-14 | E-GEOD-22852 | biostudies-arrayexpress

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Project description:Gastrointestinal stromal tumors (GIST) are phenotypically and clinically heterogeneous mesenchymal tumors. Using the cDNA array technique, we analyzed the gene expression profiles of 22 GIST and 7 non-neoplastic gastrointestinal smooth muscle specimens, in order to detect molecular differences between GIST and non-neoplastic tissue, and to detect differences between GIST of various phenotypic and clinical subgroups. As a result, we found 796 differentially expressed genes and ESTs between GIST and smooth muscle tissue, including promising new candidate genes for the pathogenesis of GIST. Furthermore, we identified differences in gene expression between GIST of different site, size, and immunohistochemical expression of CD34 and SMA. Our data show that alterations in gene expression are associated with morphologically and clinically detectable features of GIST and provide new aspects for the understanding of these tumors. Keywords = Gastrointestinal Stromal Tumor (GIST)

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Project description:Expression Data from Gastrointestinal Stromal Tumor (GIST) Cell Lines

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Mapping of ETV1 genomic binding sites in gastrointestinal stromal tumor (GIST).

Project description:ETV1 is highly expressed in GIST and their presumed precursors--the interstitial cells of Cajal. ETV1 is required for survival for both GIST and ICC and regulates GIST signature genes. Here, using Illumina-Solexa based next-generation sequencing of ETV1 chromatin immunoprecipates (ChIP-Seq), we define ETV1 binding sites in the GIST48 cell line. Crosslinked ChIP using input control ETV1 ChIP in GIST48 cells. Details: GIST48 cells were crosslinked for 15-minutes in 1% parformaldehyde. Cells were lysed and chromatin sheared using bioruptor. Sheared chromatin was incubated with anti-rabbit IgG dynabeads pre-conjugated with anti-ETV1 antibody (Abcam Ab81086, Lot 787879), washed, eluted, reverse cross-linked, and purified. Purified ChIP DNA was blunt-ended, ligated to Solexa adaptors, amplified with 18-cycles of PCR, and sequenced on Solexa Genome Analyzer. All reads (~36-bp) from ChIP-Seq were aligned to the human genome (build 36, or hg18) using the ELAND alignment software within the Illumina Analysis Pipeline. Unique reads mapped to a single best-matching location with no more than two mismatches were kept and used to generate genome-wide distribution of ETV1-binding and for peak identification. Redundant reads were considered once.

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