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Related Experiment Videos

Calcium, calmodulin and cell cycle progression

N Takuwa1, W Zhou, Y Takuwa

  • 1Department of Physiology, Faculty of Medicine, University of Tokyo, Japan.

Cellular Signalling
|February 1, 1995
PubMed
Summary
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Calcium and calmodulin are crucial for mammalian cell proliferation, regulating cell cycle progression. Cancer cells show altered calcium signaling, becoming less dependent on extracellular calcium for growth.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Cell proliferation is fundamentally dependent on extracellular calcium (Ca2+) concentrations.
  • Growth factors trigger Ca2+ release and influx, essential for cell cycle progression.
  • Calmodulin is identified as a key mediator in Ca2+-dependent cell growth regulation.

Purpose of the Study:

  • To elucidate the role of Ca2+ and calmodulin in mammalian cell proliferation.
  • To investigate the mechanisms by which Ca2+ and calmodulin regulate cell cycle transitions.
  • To explore potential dysregulations in Ca2+ and calmodulin signaling in transformed cells.

Main Methods:

  • Review of existing evidence on Ca2+ and calmodulin roles in cell cycle.
  • Analysis of Ca2+ and calmodulin involvement in gene expression and kinase activation.

Related Experiment Videos

  • Comparison of Ca2+ and calmodulin dependency in normal versus transformed cells.

    • Main Results:

    • Ca2+ and calmodulin regulate multiple cell cycle phases (G1, S, M).
    • They activate key cell cycle regulators like p33cdk2 and p34cdc2.
    • Ca2+/calmodulin-dependent enzymes are involved in DNA replication and cytokinesis.

    Conclusions:

    • Ca2+ and calmodulin are essential for normal cell cycle progression and proliferation.
    • Dysregulated Ca2+ and calmodulin signaling may contribute to uncontrolled growth in cancer cells.
    • Targeting Ca2+ and calmodulin pathways could offer therapeutic strategies for cancer.