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Virus Delivery of CRISPR Guides to the Murine Prostate for Gene Alteration
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CRISPR-Induced TMPRSS2-ERG Gene Fusions in Mouse Prostate Organoids.

Else Driehuis1,2, Hans Clevers1,3

  • 1Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), The Netherlands.

JSM Biotechnology & Biomedical Engineering
|December 14, 2018
PubMed
Summary
This summary is machine-generated.

Researchers created mouse prostate organoids with TMPRSS2-ERG gene fusions using CRISPR/Cas9. This genetic alteration leads to ERG overexpression, which is mediated by the androgen receptor.

Keywords:
CRISPR/Cas9Genetic engineeringOrganoidsTMPRSS2-ERG

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Area of Science:

  • Oncology
  • Genetics
  • Molecular Biology

Background:

  • TMPRSS2-ERG gene fusions are prevalent in prostate cancer, historically modeled via ERG overexpression.
  • Existing models do not fully recapitulate the complex genetic mechanisms of these fusions.

Purpose of the Study:

  • To develop a novel preclinical model of TMPRSS2-ERG gene fusion in prostate cancer.
  • To investigate the androgen receptor's role in regulating the expression of TMPRSS2-ERG fusion transcripts.

Main Methods:

  • Utilized a CRISPR/Cas9 gene-editing strategy to induce TMPRSS2-ERG gene fusion in mouse prostate organoids.
  • Analyzed gene expression levels of ERG following the induction of the fusion.
  • Administered Nilutamide, an androgen receptor antagonist, to assess its effect on fusion transcript expression.

Main Results:

  • Successfully generated mouse prostate organoids harboring the TMPRSS2-ERG gene fusion.
  • The genetic fusion resulted in significant ERG overexpression.
  • ERG expression from the fusion transcript was found to be androgen receptor-mediated and could be suppressed by Nilutamide treatment.

Conclusions:

  • The CRISPR/Cas9-generated mouse prostate organoid model accurately reflects TMPRSS2-ERG fusion-driven ERG overexpression.
  • This model provides a new platform for studying prostate cancer genetics and evaluating therapeutic strategies targeting the androgen receptor pathway.