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Autophagy inhibition enhances apoptosis induced by dioscin in huh7 cells

Ming-Ju Hsieh1, Shun-Fa Yang, Yih-Shou Hsieh

  • 1School of Medical Laboratory and Biotechnology, Chung Shan Medical University, 110, Section 1, Chien-Kuo N. Road, Taichung 402, Taiwan.

Evidence-Based Complementary and Alternative Medicine : Ecam
|November 30, 2012
PubMed

Insights

Dioscin induces autophagy in hepatoma cells, a process that appears cytoprotective. Inhibiting autophagy enhances dioscin-induced apoptosis, suggesting a complex role in cancer therapy.

Area of Science:

  • Cell Biology
  • Cancer Research
  • Pharmacology

Background:

  • Herbal medicines show promise as adjunct cancer therapies.
  • The specific impact of dioscin on tumor cell autophagy remains unclear.
  • Hepatoma cells are a key focus for cancer treatment research.

Purpose of the Study:

  • To investigate the effects of dioscin on hepatoma cell autophagy.
  • To elucidate the relationship between dioscin, apoptosis, and autophagy.
  • To determine dioscin's potential cytoprotective role in hepatoma cells.

Main Methods:

  • Dose-dependent treatment of Huh7 hepatoma cells with dioscin.
  • Assessment of apoptosis via caspase-3 and caspase-9 activation.
  • Analysis of autophagy markers, including LC3-II protein expression.
  • Utilized ERK1/2 phosphorylation inhibition and autophagy inhibitors.

Main Results:

  • Dioscin induced dose-dependent apoptosis, dependent on caspase-3 and -9 activation.
  • Inhibition of ERK1/2 phosphorylation blocked dioscin-induced apoptosis.
  • Dioscin triggered autophagy in early stages, with increased LC3-II expression.
  • Autophagy inhibition enhanced dioscin-induced apoptosis, while blocking apoptosis diminished autophagy.

Conclusions:

  • Dioscin induces autophagy in Huh7 hepatoma cells.
  • Dioscin exhibits a cytoprotective effect, potentially mediated by autophagy.
  • The interplay between apoptosis and autophagy is crucial in dioscin's action.

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