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A systematic experimental evaluation of microRNA markers of human bladder cancer.


ABSTRACT:

Background

MicroRNAs (miRNAs) are a class of small RNAs that regulate gene expression. They are aberrantly expressed in many human cancers and are potential therapeutic targets and molecular biomarkers.

Methods

In this study, we for the first time validated the reported data on the entire set of published differential miRNAs (102 in total) through a series of transcriptome-wide experiments. We have conducted genome-wide miRNA profiling in 17 urothelial carcinoma bladder tissues and in nine normal urothelial mucosa samples using three methods: (1) An Illumina HT-12 microarray hybridization (MA) analysis (2) a suppression-subtractive hybridization (SSH) assay followed by deep sequencing (DS) and (3) DS alone.

Results

We show that DS data correlate with previously published information in 87% of cases, whereas MA and SSH data have far smaller correlations with the published information (6 and 9% of cases, respectively). qRT-PCR tests confirmed reliability of the DS data.

Conclusions

Based on our data, MA and SSH data appear to be inadequate for studying differential miRNA expression in the bladder.

Impact

We report the first comprehensive validated database of miRNA markers of human bladder cancer.

SUBMITTER: Zabolotneva AA 

PROVIDER: S-EPMC3828615 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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<h4>Background</h4>MicroRNAs (miRNAs) are a class of small RNAs that regulate gene expression. They are aberrantly expressed in many human cancers and are potential therapeutic targets and molecular biomarkers.<h4>Methods</h4>In this study, we for the first time validated the reported data on the entire set of published differential miRNAs (102 in total) through a series of transcriptome-wide experiments. We have conducted genome-wide miRNA profiling in 17 urothelial carcinoma bladder tissues an  ...[more]

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