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Related Experiment Videos

Ras-responsive genes and tumor metastasis

A F Chambers1, A B Tuck

  • 1London Regional Cancer Centre, Ontario, Canada.

Critical Reviews in Oncogenesis
|January 1, 1993
PubMed
Summary
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Ras oncogenes can drive cancer metastasis by altering gene expression. Understanding these changes and why some cells resist ras signals offers insights into tumor progression and potential therapies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Ras oncogenes are implicated in inducing metastatic properties in cells.
  • Metastasis can occur without ras activation, suggesting common molecular changes.
  • Ras-mediated changes in gene expression are key to understanding tumor progression.

Purpose of the Study:

  • To review how ras oncogenes influence metastatic ability in model systems.
  • To explore common molecular changes associated with metastasis, regardless of ras activation.
  • To investigate mechanisms of resistance to oncogenic ras signals.

Main Methods:

  • Review of studies using ras as a tool to understand metastasis.
  • Analysis of ras-mediated changes in gene expression.

Related Experiment Videos

  • Examination of cellular responses and resistance to oncogenic ras signals.

    • Main Results:

    • Ras expression increases degradative enzymes (metalloproteinases, cysteine proteinases) and decreases inhibitors (TIMPs, cystatins).
    • Metastatic ras-transformed cells show increased calcyclin and osteopontin expression.
    • Some cell lines exhibit resistance to ras-mediated tumor progression.

    Conclusions:

    • Ras oncogenes drive metastasis through specific gene expression alterations.
    • Common molecular pathways contribute to metastasis, even without ras involvement.
    • Studying resistant cells may reveal broader therapeutic strategies for cancer metastasis.