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Minireview: Cyclin D1: normal and abnormal functions

Maofu Fu1, Chenguang Wang, Zhiping Li

  • 1Lombardi Comprehensive Cancer Center, Department of Oncology, Georgetown University, Washington, DC 20057-1468, USA.

Endocrinology
|August 28, 2004
PubMed

Insights

Cyclin D1, a key cell cycle regulator, is implicated in various cancers. Emerging research highlights its novel, cyclin-dependent kinase-independent roles in tumorigenesis.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Oncology

Background:

  • Cyclin D1 is a regulatory protein controlling cell cycle progression by phosphorylating the retinoblastoma protein.
  • Overexpression of cyclin D1 is linked to the development of several human cancers, including breast, prostate, and melanoma.
  • While traditionally viewed as a cyclin-dependent kinase (CDK)-dependent regulator, novel functions are emerging.

Purpose of the Study:

  • To review the established and novel functions of cyclin D1.
  • To emphasize the cell cycle or CDK-independent roles of cyclin D1.
  • To explore the implications of these novel functions in tumorigenesis.

Main Methods:

  • Literature review of existing studies on cyclin D1.
  • Analysis of research on cyclin D1's interaction with transcription factors and chromatin remodeling proteins.
  • Examination of studies investigating cyclin D1's roles in cellular metabolism, differentiation, and migration.

Main Results:

  • Cyclin D1 regulates transcription factors, coactivators, and chromatin remodeling proteins.
  • Cyclin D1 exhibits CDK-independent functions in cellular metabolism, fat cell differentiation, and migration.
  • These novel functions are increasingly recognized for their potential role in cancer development.

Conclusions:

  • Cyclin D1 possesses both canonical CDK-dependent and non-canonical CDK-independent functions.
  • The CDK-independent roles of cyclin D1 in cellular processes like metabolism and migration are significant for understanding its role in tumorigenesis.
  • Further research into these novel functions may reveal new therapeutic strategies for cyclin D1-associated cancers.

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