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Updated: Jan 30, 2026

Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
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Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library

Published on: April 6, 2012

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A miRNA-Mediated Approach to Dissect the Complexity of Tumor-Initiating Cell Function and Identify miRNA-Targeting

Anil Belur Nagaraj1, Peronne Joseph1, Erin Ponting1

  • 1Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA.

Stem Cell Reports
|January 11, 2019
PubMed

Insights

Researchers developed a novel miRNA-sensor platform to identify and analyze tumor-initiating cells (TICs). This method revealed miR-181a as a key regulator in ovarian cancer TICs, leading to the discovery of potential new drug targets.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Stem Cell Research

Background:

  • Tumor-initiating cells (TICs) are crucial drivers of cancer drug resistance and recurrence.
  • Effective therapeutic strategies necessitate a deeper understanding of TIC biology and regulatory mechanisms.

Purpose of the Study:

  • To establish a novel method for identifying, enriching, and analyzing TICs from patient samples.
  • To investigate the role of microRNAs (miRNAs) in TIC regulation and drug resistance.
  • To develop a platform for high-throughput drug screening targeting TICs.

Main Methods:

  • Utilization of miRNA-3' UTR sensor vectors for TIC identification and analysis.
  • Sorting of miR-181a-high subpopulations from primary ovarian tumor cells.
  • In vivo validation of TIC properties and enrichment under cisplatin treatment.
  • High-throughput drug screening using the miRNA-sensor platform.

Main Results:

  • An miR-181a-high cell subpopulation displayed TIC characteristics in vivo.
  • This subpopulation was enriched following continuous cisplatin treatment, indicating a role in drug resistance.
  • Activation of key stem cell regulatory pathways was observed in miR-181a-high TICs.
  • BET inhibitors were identified as transcriptional inhibitors of miR-181a.

Conclusions:

  • miRNA-3' UTR sensor vectors provide a robust platform for studying TICs.
  • miR-181a plays a significant role in the regulation and maintenance of ovarian cancer TICs.
  • The developed platform facilitates the discovery of novel miRNA-targeting drugs for cancer therapy.
Keywords:
BET inhibitorsmiR-181amiRNA sensorovarian cancertumor heterogeneitytumor-initiating cells

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