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Discovery pipeline for epigenetically deregulated miRNAs in cancer: integration of primary miRNA transcription

by: Toby Hulf, Tennille Sibbritt, Erik Wiklund, Saul Bert, Dario Strbenac, Aaron Statham, Mark Robinson, Susan Clark
BMC Genomics, Vol. 12, No. 1. (21 January 2011), 54, doi:10.1186/1471-2164-12-54  Key: citeulike:8670567

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Abstract

BACKGROUND:Cancer is commonly associated with widespread disruption of DNA methylation, chromatin modification and miRNA expression. In this study, we established a robust discovery pipeline to identify epigenetically deregulated miRNAs in cancer.RESULTS:Using an integrative approach that combines primary transcription, genome-wide DNA methylation and H3K9Ac marks with microRNA (miRNA) expression, we identified miRNA genes that were epigenetically modified in cancer. We find miR-205, miR-21, and miR-196b to be epigenetically repressed, and miR-615 epigenetically activated in prostate cancer cells.CONCLUSIONS:We show that detecting changes in primary miRNA transcription levels is a valuable method for detection of local epigenetic modifications that are associated with changes in mature miRNA expression.


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