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Updated: May 4, 2026

miRNA Expression Analyses in Prostate Cancer Clinical Tissues
11:29

miRNA Expression Analyses in Prostate Cancer Clinical Tissues

Published on: September 8, 2015

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Coordinate microRNA-mediated regulation of protein complexes in prostate cancer

Mohammed Alshalalfa1, Gary D Bader2, Tarek A Bismar3

  • 1Department of Computer Science, University of Calgary, Calgary, Alberta, Canada ; Biotechnology Research Centre, Palestine Polytechnic University, Hebron, Palestine.

Plos One
|January 7, 2014
PubMed

Insights

MicroRNAs (miRNAs) significantly disrupt protein complexes and pathways in prostate cancer. Specific miRNAs, like miRNA-1 and miRNA-16, act as master regulators, offering potential diagnostic and prognostic biomarkers.

Area of Science:

  • Molecular Biology
  • Genomics
  • Cancer Research

Background:

  • MicroRNAs (miRNAs) are crucial post-transcriptional regulators of gene expression.
  • Emerging evidence indicates miRNAs target functionally related proteins, including protein complexes and biological pathways.
  • The impact of miRNAs on protein complexes in disease, specifically prostate cancer, remains understudied.

Purpose of the Study:

  • To develop an entropy-based framework for identifying miRNA-mediated dysregulation of protein complexes and pathways in prostate cancer progression.
  • To characterize the influence of specific miRNAs on genes encoding proteins within complexes and pathways during cancer development.

Main Methods:

  • Utilized experimentally verified miRNA-target interactions, protein complex data, and gene expression data.
  • Constructed correlation matrices between functionally related proteins and miRNAs targeting them.
  • Assessed changes in Shannon entropy of protein modules across different stages of prostate cancer.

Main Results:

  • Identified SMAD4 and HDAC-containing protein complexes as highly disrupted by miRNAs, notably miRNA-1 and miRNA-16.
  • Revealed dysregulation in NF-kB, RAS, and Syndecan-mediated pathways due to miRNA-1 and miRNA-16.
  • Highlighted miRNAs with high-influence on disrupted complexes as potential diagnostic and prognostic biomarkers for prostate cancer.

Conclusions:

  • miRNA-1 and miRNA-16 are key regulators of miRNA-mediated gene regulation in prostate cancer.
  • The developed framework effectively identifies miRNA-mediated protein complex and pathway dysregulation.
  • This approach shows promise for discovering novel miRNAs and protein complexes relevant to prostate cancer progression.

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