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Related Experiment Videos

Sam68 exerts separable effects on cell cycle progression and apoptosis.

Stephen J Taylor1, Ross J Resnick, David Shalloway

  • 1Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA. suburbantrain@yahoo.com

BMC Cell Biology
|January 23, 2004
PubMed
Summary

Sam68, an RNA-binding protein, can trigger cell cycle arrest or apoptosis depending on its RNA-binding ability. This protein

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Sam68 is an RNA-binding protein involved in various cellular processes.
  • Its exact role in essential cellular functions is not fully understood.

Purpose of the Study:

  • To investigate the impact of Sam68 overexpression on cell proliferation and survival.
  • To determine the role of Sam68's RNA-binding domain in its cellular functions.

Main Methods:

  • Conditional overexpression of Sam68 in fibroblasts.
  • Analysis of cell cycle progression (G1 arrest, cyclin levels, Rb phosphorylation).
  • Assessment of apoptosis induction and the requirement of the RNA-binding domain.

Main Results:

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  • Sam68 overexpression causes G1 cell cycle arrest and apoptosis.
  • Cell cycle arrest is independent of RNA-binding ability.
  • Apoptosis induction requires a functional RNA-binding domain.
  • Trichostatin A enhances Sam68-induced apoptosis.

    • Conclusions:

    • Sam68 has separable effects on cell proliferation and survival, dependent on RNA binding.
    • These findings highlight the role of RNA-binding proteins in cell function.
    • Sam68's role in apoptosis may influence cancer treatment strategies.