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Plos Genetics : Identification of Y-box Binding Protein 1 as a Core Regulator of Mek, Volume 6

By Cheung, Vivian G.

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Book Id: WPLBN0003929731
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos Genetics : Identification of Y-box Binding Protein 1 as a Core Regulator of Mek, Volume 6  
Author: Cheung, Vivian G.
Volume: Volume 6
Language: English
Subject: Journals, Science, Genetics
Collections: Periodicals: Journal and Magazine Collection (Contemporary), PLoS Genetics
Publication Date:
Publisher: Plos


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Cheung, V. G. (n.d.). Plos Genetics : Identification of Y-box Binding Protein 1 as a Core Regulator of Mek, Volume 6. Retrieved from

Description : Transcriptional signatures are an indispensible source of correlative information on disease-related molecular alterations on a genome-wide level. Numerous candidate genes involved in disease and in factors of predictive, as well as of prognostic, value have been deduced from such molecular portraits, e.g. in cancer. However, mechanistic insights into the regulatory principles governing global transcriptional changes are lagging behind extensive compilations of deregulated genes. To identify regulators of transcriptome alterations, we used an integrated approach combining transcriptional profiling of colorectal cancer cell lines treated with inhibitors targeting the receptor tyrosine kinase (RTK)/RAS/mitogenactivated protein kinase pathway, computational prediction of regulatory elements in promoters of co-regulated genes, chromatin-based and functional cellular assays. We identified commonly co-regulated, proliferation-associated target genes that respond to the MAPK pathway. We recognized E2F and NFY transcription factor binding sites as prevalent motifs in those pathway-responsive genes and confirmed the predicted regulatory role of Y-box binding protein 1 (YBX1) by reporter gene, gel shift, and chromatin immunoprecipitation assays. We also validated the MAPK-dependent gene signature in colorectal cancers and provided evidence for the association of YBX1 with poor prognosis in colorectal cancer patients. This suggests that MEK/ERK-dependent, YBX1-regulated target genes are involved in executing malignant properties.


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