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Dysregulated methylation at imprinted genes in prostate tumor tissue detected by methylation microarray.


ABSTRACT: BACKGROUND: Imprinting is an important epigenetic regulator of gene expression that is often disrupted in cancer. While loss of imprinting (LOI) has been reported for two genes in prostate cancer (IGF2 and TFPI2), disease-related changes in methylation across all imprinted gene regions has not been investigated. METHODS: Using an Illumina Infinium Methylation Assay, we analyzed methylation of 396 CpG sites in the promoter regions of 56 genes in a pooled sample of 12 pairs of prostate tumor and adjacent normal tissue. Selected LOI identified from the array was validated using the Sequenom EpiTYPER assay for individual samples and further confirmed by expression data from publicly available datasets. RESULTS: Methylation significantly increased in 52 sites and significantly decreased in 17 sites across 28 unique genes (P?

SUBMITTER: Jacobs DI 

PROVIDER: S-EPMC3751920 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Dysregulated methylation at imprinted genes in prostate tumor tissue detected by methylation microarray.

Jacobs Daniel I DI   Mao Yingying Y   Fu Alan A   Kelly William Kevin WK   Zhu Yong Y  

BMC urology 20130726


<h4>Background</h4>Imprinting is an important epigenetic regulator of gene expression that is often disrupted in cancer. While loss of imprinting (LOI) has been reported for two genes in prostate cancer (IGF2 and TFPI2), disease-related changes in methylation across all imprinted gene regions has not been investigated.<h4>Methods</h4>Using an Illumina Infinium Methylation Assay, we analyzed methylation of 396 CpG sites in the promoter regions of 56 genes in a pooled sample of 12 pairs of prostat  ...[more]

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