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Human somatic cell mutagenesis creates genetically tractable sarcomas

Sam D Molyneux1, Paul D Waterhouse1, Dawne Shelton2

  • 1Department of Medical Biophysics, Ontario Cancer Institute, University of Toronto, Toronto, Ontario, Canada.

Nature Genetics
|August 18, 2014
PubMed

Insights

Scientists developed a novel hybrid viral-transposon system for cancer gene discovery in human cells. This method rapidly generated tumors, identifying new cancer driver genes like HDLBP, crucial for understanding tumor suppressor roles.

Area of Science:

  • Cancer Biology
  • Genetics
  • Molecular Oncology

Background:

  • Generating spontaneous, genetically defined human tumors from normal cells is a significant challenge in cancer research.
  • Existing methods for cancer gene discovery often have limitations in higher eukaryotes.

Purpose of the Study:

  • To develop a method for cancer gene discovery using insertional mutagenesis in human primary cells.
  • To identify novel cancer driver genes and tumor suppressors by analyzing tumor genomes.

Main Methods:

  • Combined retroviral and Sleeping Beauty transposon insertional mutagenesis in human bone explant mesenchymal cells.
  • Utilized lentiviruses for gain- and loss-of-function gene disruption elements.
  • Analyzed tumor genomes to identify recurrent insertion sites and copy-number aberrations.

Main Results:

  • Rapid generation of de novo high-grade myxofibrosarcomas.
  • Enrichment of insertion sites in known cancer-associated genomic regions.
  • Identification of HDLBP (vigilin) as a candidate tumor suppressor deleted at 2q37.3 in multiple tumor types.

Conclusions:

  • Hybrid viral-transposon systems offer a powerful approach for cancer gene discovery in human cells.
  • This system facilitates functional annotation of cancer genomes and identification of novel therapeutic targets.
  • The findings highlight HDLBP's role as a potential tumor suppressor across various cancers.

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