Nuclear Factor-κB modulates cellular glutathione and prevents oxidative stress in cancer cells.

Publication Type:

Journal Article

Source:

Cancer letters, Volume 299, Issue 1, p.45-53 (2010)

Keywords:

2010, Animals, Arsenicals, Center-Authored Paper, Glutathione, Human Biology Division, Humans, LEUKEMIA, Male, MICE, NF-kappa B, OXIDATIVE STRESS, Oxides, Prostatic Neoplasms, Signal Transduction

Abstract:

The NF-κB is best known for its role in inflammation. Here we show that constitutive NF-κB activity in cancer cells promotes the biosynthesis of redox scavenger glutathione (GSH), which in turn confers resistance to oxidative stress. Inhibition of NF-κB significantly decreases GSH in several lines of human leukemia and prostate cancer cells possessing high or moderate NF-κB activities. Concomitantly, NF-κB inhibition by pharmacological and molecular means sensitizes "NF-κB positive" cancer cells to chemically-induced oxidative stress and death. We propose that inhibition of NF-κB can reduce intracellular GSH in "NF-κB-positive" cancers thereby improving the efficacy of oxidative stress-based anti-cancer therapy.