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Dioscin induces cancer cell apoptosis through elevated oxidative stress mediated by downregulation of peroxiredoxins

Zhiyu Wang1, Yue Cheng, Neng Wang

  • 1School of Chinese Medicine, The University of Hong Kong, Hong Kong, China.

Cancer Biology & Therapy
|January 11, 2012
PubMed

Insights

Dioscin triggers cancer cell death by increasing oxidative stress via reactive oxygen species (ROS). Antioxidants block this effect, highlighting ROS and specific proteins as key targets for dioscin

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • Dioscin exhibits anticancer properties, but its precise molecular mechanisms remain unclear.
  • Understanding dioscin's action is crucial for developing novel cancer therapies.

Purpose of the Study:

  • To elucidate the molecular mechanisms underlying dioscin-induced apoptosis in cancer cells.
  • To investigate the role of oxidative stress and specific proteins in dioscin's anticancer activity.

Main Methods:

  • In vitro treatment of human esophageal cancer cells (Kyse510) with dioscin.
  • Measurement of reactive oxygen species (ROS) generation and apoptosis induction.
  • Assessment of oxidative stress inhibition using N-acetylcysteine.
  • Proteomic analysis and protein gel blotting to identify key proteins.
  • Overexpression studies of identified proteins (PRDX 1 and 6).

Main Results:

  • Dioscin treatment rapidly increased ROS generation and induced mitochondrial apoptosis in Kyse510 cells.
  • N-acetylcysteine administration blocked dioscin-induced apoptosis, confirming ROS as the primary mediator.
  • Proteomic analysis identified peroxiredoxins 1 and 6 (PRDX 1 and 6) as proteins associated with dioscin's effects.
  • Overexpression of PRDX 1 and 6 significantly attenuated dioscin-induced ROS elevation and apoptosis.

Conclusions:

  • Dioscin induces apoptosis in cancer cells primarily through the generation of intracellular oxidative stress.
  • Peroxiredoxins 1 and 6 are identified as key molecular targets mediating dioscin's pro-apoptotic effects via ROS regulation.

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