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Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
11:44

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

Published on: March 30, 2019

De-regulated microRNAs in pediatric cancer stem cells target pathways involved in cell proliferation, cell cycle and

Patricia C Sanchez-Diaz1, Tzu-Hung Hsiao, Judy C Chang

  • 1Greehey Children's Cancer Research Institute, University of Texas Health Science Center San Antonio, San Antonio, Texas, United States of America.

Plos One
|April 25, 2013
PubMed
Abstract

Insights

Deregulation of microRNAs (miRNAs) is linked to pediatric cancers. This study identified specific miRNAs targeting key pathways, suggesting potential therapeutic strategies for pediatric cancer stem cells (CSCs).

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNAs (miRNAs) play crucial roles in biological processes, and their dysregulation is associated with various cancers.
  • The cancer stem cell (CSC) model is increasingly recognized in pediatric cancers.
  • A common miRNA signature in CSCs may underlie disrupted signaling pathways.

Purpose of the Study:

  • To identify deregulated miRNAs within the cancer stem cell (CSC) fraction in pediatric cancers.
  • To elucidate the signaling pathways regulated by these CSC-associated miRNAs.
  • To explore potential therapeutic applications of these findings.

Main Methods:

  • High-throughput quantitative PCR (qPCR) was employed to identify differentially expressed miRNAs (DEmiRs) in CSCs.
  • The BCmicrO algorithm was used to predict potential targets of identified DEmiRs.
  • Pathway analysis (KEGG, Biocarta, Gene Ontology) was performed on predicted targets.

Main Results:

  • 26 CSC-associated DEmiRs were identified.
  • 865 potential CSC-associated DEmiR targets were predicted.
  • Enriched pathways included cell cycle, cell proliferation, p53, and TGF-beta/BMP signaling.
  • Knockdown of specific miRNAs (hsa-miR-21-5p, hsa-miR-181c-5p, hsa-miR-135b-5p) reduced CSC fraction and sphere formation.

Conclusions:

  • CSC-associated DEmiRs and their regulated pathways show promise for therapeutic intervention in pediatric cancers.
  • Targeting these miRNAs could offer novel treatment strategies for pediatric malignancies.

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