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Mammalian G1 cyclins

G F Draetta1

  • 1Mitotix Incorporated, Cambridge.

Current Opinion in Cell Biology
|December 1, 1994
PubMed
Summary
This summary is machine-generated.

D- and E-type cyclins are key regulators of the mammalian cell cycle

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Area of Science:

  • Cell Biology
  • Molecular Biology

Background:

  • D- and E-type cyclins control mammalian cell cycle progression through G1 phase.
  • Mechanisms of cyclin D and E-dependent kinase accumulation and activation are increasingly understood.
  • Dysregulation of these cyclins is implicated in various human cancers.

Purpose of the Study:

  • To elucidate the mechanisms of cyclin D and E-dependent kinase regulation.
  • To investigate the role of cyclin D1 overexpression and p16INK4 gene alterations in human cancers.

Main Methods:

  • Analysis of genetic rearrangements, deletions, and mutations.
  • Investigation of cyclin D1 protein expression.
  • Examination of p16INK4 gene status.

Main Results:

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  • Overexpression of cyclin D1 protein is linked to genetic rearrangements.
  • Deletions or mutations in the p16INK4 gene are observed in numerous cancers.
  • These alterations are prevalent in breast, esophageal, and other carcinomas, lymphomas, and melanomas.

Conclusions:

  • Cyclin D1 overexpression and p16INK4 gene alterations are common in human cancers.
  • These molecular changes contribute to cell cycle dysregulation in oncogenesis.
  • Understanding these mechanisms offers insights into cancer development.