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Survivin deficiency induces apoptosis and cell cycle arrest in HepG2 hepatocellular carcinoma cells

Dejian Dai1, Yunjia Liang, Zhihua Xie

  • 1Department of General Surgery, Shanghai Eighth People's Hospital, Jiangshu University, 8 Caobao Road, Shanghai 200235, PR China. daidejian@hotmail.com

Oncology Reports
|November 15, 2011
PubMed

Insights

Survivin protein regulates cell division and inhibits apoptosis. Its deficiency causes cell cycle arrest and cell death, highlighting its role in connecting cell division and apoptosis.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Cancer Research

Background:

  • Survivin is implicated in both inhibiting apoptosis and inducing mitosis.
  • Understanding survivin's role is crucial for cancer research.

Purpose of the Study:

  • To investigate if survivin connects the cell cycle with apoptosis.
  • To explore survivin's function in cell viability and division.

Main Methods:

  • Time-lapse imaging of HepG2 cells with survivin deficiency.
  • Monitoring morphological changes and apoptosis progression.
  • Assessing caspase-3-like protease activation.

Main Results:

  • Survivin deficiency led to defective mitosis (multinucleation, polyploidy) and cell cycle arrest (S or G2/M phase).
  • Apoptosis followed cell cycle arrest, dependent on survivin compartment destruction and caspase activation.
  • Specialized subcellular localization of survivin is essential for its function.

Conclusions:

  • Survivin acts as a mitotic regulator and apoptosis inhibitor.
  • Survivin bridges cell division and apoptosis pathways.
  • Overexpression of survivin is vital for cell viability, cell cycle progression, and genetic stability during division.

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