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Dissecting the regulation rules of cancer-related miRNAs based on network analysis

Zhongyu Liu1, Yanzhi Guo2, Xuemei Pu2

  • 1College of Life Science, Sichuan University, Chengdu, Sichuan 610064, PR China.

Scientific Reports
|October 4, 2016
PubMed

Insights

MicroRNAs (miRNAs) regulate gene expression by targeting mRNAs. Aberrant miRNA activity in cancer highlights their role in disease, with more targeted miRNAs playing key roles in cancer development.

Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression by degrading target mRNAs or inhibiting protein translation.
  • Aberrant miRNA expression is linked to various diseases, particularly cancer, by altering protein-protein interaction networks (PPINs).

Purpose of the Study:

  • To systematically construct and analyze the miRNA-regulated co-expressed protein-protein interaction network (CePPIN) for 17 human cancers.
  • To investigate the role of miRNA targets in cancer development and elucidate miRNA regulation rules within PPINs.

Main Methods:

  • Construction of miRNA-CePPIN for 17 cancers.
  • Analysis of topological parameters and functional annotation of proteins within CePPIN.
  • Gene Ontology (GO) and KEGG pathway analysis.
  • Pfam classification.
  • Case study on specific miRNA-regulated subnetworks.

Main Results:

  • Proteins targeted by multiple miRNAs play significant roles in cancer formation.
  • miRNA targets are predominantly involved in cell cycle-related processes like proliferation and differentiation.
  • miRNAs from the same family often target proteins from the same family, indicating synergistic functions.

Conclusions:

  • The study provides a systematic understanding of miRNA regulation in cancer PPINs.
  • Findings highlight the critical role of miRNA-target interactions in cellular processes relevant to carcinogenesis.
  • The identified miRNA regulation rules and targets offer insights into potential cancer therapies.

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