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Bandyopadhyay et al. Silence 2010, 1:6
/content/1/1/6
R E S E A R C H Open Access
Research
Development of the human cancer microRNA
network
1 1 2 3,4
Sanghamitra Bandyopadhyay* , Ramkrishna Mitra , Ujjwal Maulik and Michael Q Zhang
Abstract
Background: MicroRNAs are a class of small noncoding RNAs that are abnormally expressed in different cancer cells.
Molecular signature of miRNAs in different malignancies suggests that these are not only actively involved in the
pathogenesis of human cancer but also have a significant role in patients survival. The differential expression patterns
of specific miRNAs in a specific cancer tissue type have been reported in hundreds of research articles. However limited
attempt has been made to collate this multitude of information and obtain a global perspective of miRNA
dysregulation in multiple cancer types.
Results: In this article a cancer-miRNA network is developed by mining the literature of experimentally verified cancer-
miRNA relationships. This network throws up several new and interesting biological insights which were not evident in
individual experiments, but become evident when studied in the global perspective. From the network a number of
cancer-miRNA modules have been identified based on a computational approach to mine associations between cancer
types and miRNAs. The modules that are generated based on these association are found to have a number of
common predicted target onco/tumor suppressor genes. This suggests a combinatorial effect of the module
associated miRNAs on target gene regulation in selective cancer tissues or cell lines. Moreover, neighboring miRNAs
(group of miRNAs that are located within 50 kb of genomic location) of these modules s
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