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Related Experiment Videos

TMEFF1 and brain tumors.

Sigal Gery1, Dong Yin, Dong Xie

  • 1Division of Hematology/Oncology, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA. gerys@cshs.org

Oncogene
|May 14, 2003
PubMed
Summary

The transmembrane protein TMEFF1, predominantly found in the brain, shows reduced expression in most brain tumors. Its reintroduction inhibited cancer cell growth, suggesting TMEFF1 acts as a tumor suppressor.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • TMEFF1 is a novel transmembrane protein with structural domains suggesting a role in growth factor signaling.
  • TMEFF1 is localized to the cell membrane and primarily expressed in normal human brain tissue.

Purpose of the Study:

  • To investigate the expression levels and potential function of TMEFF1 in brain cancers.
  • To determine if TMEFF1 exhibits tumor suppressor activity in brain cancer cells.

Main Methods:

  • Northern blot analysis for tissue expression.
  • Quantitative real-time RT-PCR for TMEFF1 expression in brain tumors.
  • Ectopic expression of TMEFF1 in brain cancer cells to assess growth inhibition.

Main Results:

  • TMEFF1 expression is significantly lower in most brain tumors (96%) compared to normal brain tissue.
  • Cancer cell lines from various tissues, including the brain, showed moderate to low TMEFF1 levels.
  • Ectopic expression of TMEFF1 led to growth inhibition of brain cancer cells.

Conclusions:

  • TMEFF1 expression is downregulated in the majority of brain tumors.
  • TMEFF1 demonstrates potential as a tumor suppressor gene in the context of brain cancers.

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