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- W4361262962 abstract "<div>Abstract<p>There is widespread interest in efficient characterization of differences between tumor and normal samples. Here, we show an effective methodology for genome-scale characterization of tumors. Using matched normal and tumor samples from liver cancer patients, as well as non–cancer-related normal liver tissue, we first determined changes in gene expression as monitored on RNA expression arrays. We identified several hundred mRNAs that were consistently changed in the tumor samples. To characterize the mechanisms responsible for creation of the tumor-specific transcriptome, we performed chromatin immunoprecipitation on microarray experiments to assay binding of RNA polymerase II, H3me3K27, and H3me3K9 and DNA methylation in 25,000 promoter regions. These experiments identified changes in active and silenced regions of the genome in the tumor cells. Finally, we used a “virtual comparative genomic hybridization” method to identify copy number alterations in the tumor samples. Through comparison of RNA polymerase II binding, chromatin structure, DNA methylation, and copy number changes, we suggest that the major contributor to creation of the liver tumor transcriptome was changes in gene copy number. [Cancer Res 2008;68(8):2641–51]</p></div>" @default.
- W4361262962 created "2023-03-31" @default.
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- W4361262962 date "2023-03-30" @default.
- W4361262962 modified "2023-09-30" @default.
- W4361262962 title "Data from Analysis of the Mechanisms Mediating Tumor-Specific Changes in Gene Expression in Human Liver Tumors" @default.
- W4361262962 doi "https://doi.org/10.1158/0008-5472.c.6498365.v1" @default.
- W4361262962 hasPublicationYear "2023" @default.
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