MicroRNAs of the mir-17~92 cluster regulate multiple aspects of pancreatic tumor development and progression

Related Experiment Video

Updated: Oct 23, 2026

An In Vitro Protocol for Evaluating MicroRNA Levels, Functions, and Associated Target Genes in Tumor Cells
09:45

An In Vitro Protocol for Evaluating MicroRNA Levels, Functions, and Associated Target Genes in Tumor Cells

Published on: May 21, 2019

Brian Quattrochi1, Anushree Gulvady2, David R Driscoll1

  • 1Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA.

Oncotarget
|April 19, 2017
PubMed

Insights

The mir-17~92 microRNA cluster promotes pancreatic cancer growth and invasion. Inhibiting this cluster can lead to tumor regression and reduced spread, offering new therapeutic avenues for pancreatic ductal adenocarcinoma.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Pancreatic ductal adenocarcinoma (PDAC) is a deadly cancer with poor treatment outcomes.
  • The mir-17~92 microRNA (miRNA) cluster is upregulated in PDAC, but its function is unclear.

Purpose of the Study:

  • To investigate the role of the mir-17~92 miRNA cluster in pancreatic cancer development and progression.
  • To determine the impact of mir-17~92 on KRAS-driven pancreatic tumorigenesis and invasion.

Main Methods:

  • Utilized genetically engineered mouse models of pancreatic cancer.
  • Assessed the effects of mir-17~92 deletion on tumor growth, precursor lesion regression, and metastasis.
  • Examined PDAC cell invasion, extracellular matrix degradation, and invadopodia formation.
  • Investigated the role of miR-19 family miRNAs using antagomirs.

Main Results:

  • Loss of mir-17~92 reduced ERK pathway activation downstream of mutant KRAS.
  • Mir-17~92 deficiency promoted regression of precursor lesions (PanINs) and extended survival in metastatic PDAC models.
  • Mir-17~92-deficient PDAC cells showed decreased invasion, reduced invadopodia formation, and less extracellular matrix degradation.
  • Inhibition of miR-19 family miRNAs mimicked these anti-invasive effects.

Conclusions:

  • The mir-17~92 cluster plays an oncogenic role throughout pancreatic cancer progression.
  • Mir-17~92 is linked to ERK pathway activation and maintenance of precursor lesions in vivo.
  • miR-19 family miRNAs are key mediators of PDAC cell invasion, representing potential therapeutic targets.
Keywords:
PanINinvasionmir-17~92pancreatic cancerregression

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