Apoptosis

, 16:1014

Withaferin A induces apoptosis in human melanoma cells through generation of reactive oxygen species and down-regulation of Bcl-2

Authors

  • Eleonore Mayola
    • INSERM UMR S-769, Université Paris-Sud 11
    • Faculté de Pharmacie, Châtenay-MalabryINSERM U1004, Université Paris-Sud 11
    • PRES UniverSud Paris
  • Cindy Gallerne
    • INSERM UMR S-769, Université Paris-Sud 11
  • Davide Degli Esposti
    • Faculté de Pharmacie, Châtenay-MalabryINSERM U1004, Université Paris-Sud 11
    • PRES UniverSud Paris
  • Cecile Martel
    • INSERM UMR S-769, Université Paris-Sud 11
    • Faculté de Pharmacie, Châtenay-MalabryINSERM U1004, Université Paris-Sud 11
    • PRES UniverSud Paris
  • Shazib Pervaiz
    • Department of Physiology, Yong Loo Lin School of MedicineNational University of Singapore
  • Lionel Larue
    • PRES UniverSud Paris
    • Institut Curie, Université Paris-Sud 11, CNRS UMR3347/INSERM U1021
  • Brigitte Debuire
    • Faculté de Pharmacie, Châtenay-MalabryINSERM U1004, Université Paris-Sud 11
    • PRES UniverSud Paris
  • Antoinette Lemoine
    • Faculté de Pharmacie, Châtenay-MalabryINSERM U1004, Université Paris-Sud 11
    • PRES UniverSud Paris
  • Catherine Brenner
    • INSERM UMR S-769, Université Paris-Sud 11
    • PRES UniverSud Paris
    • INSERM UMR S-769, Université Paris-Sud 11
    • PRES UniverSud Paris
    • Université Versailles St-Quentin
Original Paper

DOI: 10.1007/s10495-011-0625-x

Cite this article as:
Mayola, E., Gallerne, C., Esposti, D.D. et al. Apoptosis (2011) 16: 1014. doi:10.1007/s10495-011-0625-x

Abstract

A high resistance and heterogeneous response to conventional anti-cancer chemotherapies characterize malignant cutaneous melanoma, the most aggressive and deadly form of skin cancer. Withaferin A (WFA), a withanolide derived from the medicinal plant Withania somnifera, has been reported for its anti-tumorigenic activity against various cancer cells. For the first time, we examined the death-inducing potential of WFA against a panel of four different human melanoma cells and investigated the cellular mechanisms involved. WFA induces apoptotic cell death with various IC50 ranging from 1.8 to 6.1 μM. The susceptibility of cells toward WFA-induced apoptosis correlated with low Bcl-2/Bax and Bcl-2/Bim ratios. In all cell lines, the apoptotic process triggered by WFA involves the mitochondrial pathway and was associated with Bcl-2 down regulation, Bax mitochondrial translocation, cytochrome c release into the cytosol, transmembrane potential (ΔΨm) dissipation, caspase 9 and caspase 3 activation and DNA fragmentation. WFA cytotoxicity requires early reactive oxygen species (ROS) production and glutathione depletion, the inhibition of ROS increase by the antioxidant N-acetylcysteine resulting in complete suppression of mitochondrial and nuclear events. Altogether, these results support the therapeutic potential of WFA against human melanoma.

Keywords

Melanoma resistanceCell deathOncogeneChemotherapy

Copyright information

© Springer Science+Business Media, LLC 2011