Hydrogen peroxide induces cell death in human TRAIL-resistant melanoma through intracellular superoxide generation

  • Authors:
    • Mizuki Tochigi
    • Toshio Inoue
    • Miki Suzuki-Karasaki
    • Toyoko Ochiai
    • Chisei Ra
    • Yoshihiro Suzuki-Karasaki
  • View Affiliations

  • Published online on: January 10, 2013     https://doi.org/10.3892/ijo.2013.1769
  • Pages: 863-872
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

Intracellular reactive oxygen species (ROS) such as hydrogen peroxide (H2O2) are thought to mediate apoptosis induced by death receptor ligands, including tumor necrosis factor-related apoptosis-inducing ligand (TRAIL). However, the role of H2O2 is controversial, since some evidence suggests that H2O2 acts as an anti-apoptotic factor. Here, we show that exogenously applied H2O2 (30‑100 µM) induces cell death in TRAIL-resistant human melanoma cells via intracellular superoxide (O2-) generation. H2O2 induced apoptotic or necrotic cell death, depending on the concentration of the oxidant applied; low concentrations of H2O2 preferentially activated the caspase-dependent apoptotic pathway, while high concentrations of H2O2 induced apoptotic and necrotic cell death in a caspase-independent manner. The H2O2-induced cell death was associated with increased mitochondrial membrane potential collapse and caspase-3/7 activation and ER stress responses including caspase-12 and X-box-binding protein-1 (XBP-1) activation. H2O2 induced intracellular O2- generation even within the mitochondria, while TRAIL did not. The superoxide dismutase mimetic antioxidant MnTBaP [Mn (III) tetrakis (4-benzonic acid) porphyrin chloride] inhibited the H2O2‑induced O2- generation, apoptosis and XBP-1 and caspase-12 activation at comparable concentrations. Importantly, H2O2 treatment caused minimal O2- generation and apoptosis in normal primary melanocytes. These data show that H2O2 induces endoplasmic reticulum-associated cell death via intracellular O2- generation and that malignant melanoma cells are more susceptible than normal cells to this oxidative cell death. The findings suggest that H2O2 has therapeutic potential in the treatment of TRAIL‑resistant melanoma.
View Figures
View References

Related Articles

Journal Cover

March 2013
Volume 42 Issue 3

Print ISSN: 1019-6439
Online ISSN:1791-2423

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Tochigi M, Inoue T, Suzuki-Karasaki M, Ochiai T, Ra C and Suzuki-Karasaki Y: Hydrogen peroxide induces cell death in human TRAIL-resistant melanoma through intracellular superoxide generation. Int J Oncol 42: 863-872, 2013.
APA
Tochigi, M., Inoue, T., Suzuki-Karasaki, M., Ochiai, T., Ra, C., & Suzuki-Karasaki, Y. (2013). Hydrogen peroxide induces cell death in human TRAIL-resistant melanoma through intracellular superoxide generation. International Journal of Oncology, 42, 863-872. https://doi.org/10.3892/ijo.2013.1769
MLA
Tochigi, M., Inoue, T., Suzuki-Karasaki, M., Ochiai, T., Ra, C., Suzuki-Karasaki, Y."Hydrogen peroxide induces cell death in human TRAIL-resistant melanoma through intracellular superoxide generation". International Journal of Oncology 42.3 (2013): 863-872.
Chicago
Tochigi, M., Inoue, T., Suzuki-Karasaki, M., Ochiai, T., Ra, C., Suzuki-Karasaki, Y."Hydrogen peroxide induces cell death in human TRAIL-resistant melanoma through intracellular superoxide generation". International Journal of Oncology 42, no. 3 (2013): 863-872. https://doi.org/10.3892/ijo.2013.1769