Abstract
Excessive oxidative stress has been implicated in the induction of cell death in a variety of neurodegenerative diseases. In the present study, hydrogen peroxide (H2O2)-induced cell death in rat C6 glioma cells was used as a model system for studying the molecular events associated with oxidative stress-induced cell death in glial cells. We demonstrate that exposure of C6 glioma cells to H2O2 results in apoptotic cell death in a concentration-dependent manner, and caused activation of a member of the caspase-3-like family of proteases resulting in cleavage of the DNA repair enzyme poly(ADP-ribose)polymerase, PARP. Furthermore, H2O2 induced a transient activation of the transcription factor, nuclear factor kappa B (NFkB). Pre-treatment of cells with the antioxidant N-acetyl-cysteine, (NAC), prevented both the activation of NFkB and the induction of apoptosis by H2O2, suggesting a possible role for this transcription factor in oxidant-induced apoptosis in glial cells. Exposure of the cells to H2O2 led to transient activation of both c-JunN-terminal kinase (JNK) and p38 kinase but has no effect on extracellular regulated kinase (ERK) activity. Inhibition of p38 by SB203580 did not protect the cells against H2O2-induced apoptosis suggesting that activation of p38 is not essential for H2O2-mediated cell death in C6 glioma cells.
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Marangolo, M., McGee, M.M., Tipton, K.F. et al. Oxidative stress induces apoptosis in C6 glioma cells: Involvement of mitogen-activated protein kinases and nuclear factor kappa B. neurotox res 3, 397–409 (2001). https://doi.org/10.1007/BF03033200
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DOI: https://doi.org/10.1007/BF03033200