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Related Experiment Videos

How does DNA methyltransferase cause oncogenic transformation?

M Szyf1, D J Knox, S Milutinovic

  • 1Department of Pharmacology and Therapeutics, McGill University, Montreal, PQ, Canada. msyz@pharma.mcgill.ca

Annals of the New York Academy of Sciences
|July 27, 2000
PubMed
Summary

Cancer cells exhibit global hypomethylation and hypermethylation, with aberrant DNA methyltransferase 1 (DNMT1) expression. DNMT1 may cause transformation via a non-methylation mechanism, alongside DNA demethylase induction, presenting dual anticancer targets.

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Area of Science:

  • Cancer Biology
  • Epigenetics
  • Molecular Oncology

Background:

  • Cancer cells display concurrent global hypomethylation and tumor suppressor gene hypermethylation.
  • Aberrant DNA methyltransferase 1 (DNMT1) expression is linked to tumorigenic pathways, suggesting a causal role.

Purpose of the Study:

  • To investigate the mechanism by which DNMT1 induces cellular transformation.
  • To understand how global hypomethylation coexists with high DNMT1 activity in cancer cells.

Main Methods:

  • The study proposes a novel mechanism involving DNMT1 and DNA demethylase.
  • Analysis of gene expression and DNA methylation patterns in cancer cells.

Main Results:

  • Ectopic DNMT1 expression transforms cells through a non-DNA methylation-dependent pathway.

Related Experiment Videos

  • Cancer cells show induction of a DNA demethylase, leading to global hypomethylation despite high DNMT1 activity.

    • Conclusions:

    • DNMT1 and the induced DNA demethylase are key players in cellular transformation.
    • Both DNMT1 and the demethylase represent potential therapeutic targets for anticancer strategies.