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Tumor suppressor genes in the cell cycle.

R Sager1

  • 1Dana-Farber Cancer Institute, Boston, Massachusetts.

Current Opinion in Cell Biology
|April 1, 1992
PubMed
Summary

Two key tumor suppressor genes, retinoblastoma and p53, regulate cell-cycle control. Researchers are now identifying downstream genes targeted by these critical tumor suppressors.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cancer Research

Background:

  • Tumor suppressor genes retinoblastoma and p53 are recognized for their roles in cell-cycle control.
  • Their mechanisms involve phosphorylation and stage-specific transcription complexes.

Purpose of the Study:

  • To investigate the broader roles of retinoblastoma and p53 in transcription.
  • To identify downstream genes regulated by these tumor suppressors.

Main Methods:

  • Investigating participation in diverse transcription complexes.
  • Screening for down-regulated genes in tumor cells using subtractive hybridization.

Main Results:

  • Accumulating evidence suggests involvement in additional transcription complexes.
  • Subtractive hybridization is being employed to find target genes.

Conclusions:

  • Further understanding of retinoblastoma and p53 functions is emerging.
  • Identifying target genes will bridge the gap between transcription factors and their regulatory networks in cancer.

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