A meta-analysis of microRNA expression in liver cancer

MicroRNA (miRNA) played an important role in the progression of liver cancer and its diagnostic and prognostic values have been frequently studied. However, different microarray techniques and small sample size led to inconsistent findings in previous studies. We performed a comprehensive meta-analy...

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Veröffentlicht in:PloS one 2014-12, Vol.9 (12), p.e114533-e114533
Hauptverfasser: Yang, Jingcheng, Han, Shuai, Huang, Wenwen, Chen, Ting, Liu, Yang, Pan, Shangling, Li, Shikang
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creator Yang, Jingcheng
Han, Shuai
Huang, Wenwen
Chen, Ting
Liu, Yang
Pan, Shangling
Li, Shikang
description MicroRNA (miRNA) played an important role in the progression of liver cancer and its diagnostic and prognostic values have been frequently studied. However, different microarray techniques and small sample size led to inconsistent findings in previous studies. We performed a comprehensive meta-analysis of a total of 357 tumor and 283 noncancerous samples from 12 published miRNA expression studies using robust rank aggregation method. As a result, we identified a statistically significant meta-signature of five upregulated (miR-221, miR-222, miR-93, miR-21 and miR-224) and four downregulated (miR-130a, miR-195, miR-199a and miR-375) miRNAs. We then conducted miRNA target prediction and pathway enrichment analysis to find what biological process these miRNAs might affect. We found that most of the pathways were frequently associated with cell signaling and cancer pathogenesis. Thus these miRNAs may involve in the onset and progression of liver cancer and serve as potential diagnostic and therapeutic targets of this malignancy.
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subjects Biological activity
Biology and life sciences
Cancer
Cluster Analysis
Development and progression
Diagnostic systems
Gene Expression Profiling
Humans
Liver
Liver cancer
Liver Neoplasms - genetics
Malignancy
Medical diagnosis
Medicine and Health Sciences
Meta-analysis
MicroRNA
MicroRNAs - genetics
miRNA
Pathogenesis
Ribonucleic acid
RNA
Statistical analysis
Statistical methods
Therapeutic applications
title A meta-analysis of microRNA expression in liver cancer
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