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Goniothalamin induces cell cycle-specific apoptosis by modulating the redox status in MDA-MB-231 cells

Wen-Ying Chen1, Chin-Chung Wu, Yu-Hsuan Lan

  • 1Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung City, Taiwan.

European Journal of Pharmacology
|October 6, 2005
PubMed

Insights

Goniothalamin, a natural compound, triggers cancer cell death by disrupting redox balance and degrading cdc25C, leading to cell cycle arrest at the G(2)/M phase in breast cancer cells.

Area of Science:

  • Natural Product Chemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Goniothalamin is a natural styryl-lactone with potential anticancer properties.
  • The precise mechanism of goniothalamin's action in cancer cells requires further elucidation.

Purpose of the Study:

  • To investigate the mechanism of action of goniothalamin in human breast cancer MDA-MB-231 cells.
  • To determine the role of intracellular redox balance and cdc25C degradation in goniothalamin-induced cytotoxicity.

Main Methods:

  • Cell cycle analysis using flow cytometry.
  • Measurement of intracellular reactive oxygen species (ROS) and free thiol content.
  • Assessment of cdc25C protein levels and degradation.
  • Pharmacological manipulation of redox balance using N-acetylcysteine and dl-buthionine-(S,R)-sulfoximine.

Main Results:

  • Goniothalamin induced significant cell cycle arrest at the G(2)/M phase and apoptosis in MDA-MB-231 cells.
  • Treatment increased intracellular ROS and decreased free thiol content, indicating redox imbalance.
  • Goniothalamin enhanced cdc25C degradation, correlating with cell cycle arrest and apoptosis.
  • Antioxidant and glutathione synthesis inhibitor modulated goniothalamin's effects on cell cycle and apoptosis.

Conclusions:

  • Goniothalamin disrupts intracellular redox balance, leading to cdc25C degradation.
  • This mechanism results in cell cycle arrest and apoptosis, primarily at the G(2)/M phase.
  • Goniothalamin represents a promising agent for breast cancer therapy, acting via redox-sensitive pathways.

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