We report that the expression of mutant G93A copper/zinc superoxide dismutase (SOD1), associated with familial amyotrophic lateral sclerosis, specifically causes a decrease in MTT reduction rate and ATP levels and an increase in both cytosolic and mitochondrial reactive oxygen species (ROS) production in human neuroblastoma SH-SY5Y cells compared to cells overexpressing wild-type SOD1 and untransfected cells. Exposure to N-acetylcysteine lowers ROS production and returns mitochondrial functional assays to control levels. No large aggregates of human SOD1 are detectable under basal growth conditions in any of the investigated cell lines. After proteasome activity inhibition, SOD1 aggregates can be detected exclusively in G93A-SOD1 cells, even though they do not per se enhance cell death compared to control cell lines. Our findings indicate that mitochondrial homeostasis is affected by mutant SOD1-generated ROS independently from the formation of aggregates and that this alteration is reversed by antioxidants

Beretta, S., Sala, G., Mattavelli, L., Ceresa, C., Casciati, A., Ferri, A., et al. (2003). Mitochondrial dysfunction due to mutant copper/zinc superoxide dismutase associated with amyotrophic lateral sclerosis is reversed by N-acetylcysteine. NEUROBIOLOGY OF DISEASE, 13(3), 213-221 [10.1016/S0969-9961(03)00043-3].

Mitochondrial dysfunction due to mutant copper/zinc superoxide dismutase associated with amyotrophic lateral sclerosis is reversed by N-acetylcysteine

Beretta, S;Sala, G;Mattavelli, L;Ceresa, C;Ferrarese, C
2003

Abstract

We report that the expression of mutant G93A copper/zinc superoxide dismutase (SOD1), associated with familial amyotrophic lateral sclerosis, specifically causes a decrease in MTT reduction rate and ATP levels and an increase in both cytosolic and mitochondrial reactive oxygen species (ROS) production in human neuroblastoma SH-SY5Y cells compared to cells overexpressing wild-type SOD1 and untransfected cells. Exposure to N-acetylcysteine lowers ROS production and returns mitochondrial functional assays to control levels. No large aggregates of human SOD1 are detectable under basal growth conditions in any of the investigated cell lines. After proteasome activity inhibition, SOD1 aggregates can be detected exclusively in G93A-SOD1 cells, even though they do not per se enhance cell death compared to control cell lines. Our findings indicate that mitochondrial homeostasis is affected by mutant SOD1-generated ROS independently from the formation of aggregates and that this alteration is reversed by antioxidants
Articolo in rivista - Articolo scientifico
Reactive Oxygen Species; Caspases; Fluorescent Antibody Technique; Thiazoles; Mutation; Cell Death; Adenosine Triphosphate; Blotting, Western; DNA Fragmentation; Neuroblastoma; Humans; Mitochondria; Amyotrophic Lateral Sclerosis; Caspase 3; Tumor Cells, Cultured; Free Radical Scavengers; L-Lactate Dehydrogenase; Tetrazolium Salts; Acetylcysteine; Superoxide Dismutase
English
2003
13
3
213
221
none
Beretta, S., Sala, G., Mattavelli, L., Ceresa, C., Casciati, A., Ferri, A., et al. (2003). Mitochondrial dysfunction due to mutant copper/zinc superoxide dismutase associated with amyotrophic lateral sclerosis is reversed by N-acetylcysteine. NEUROBIOLOGY OF DISEASE, 13(3), 213-221 [10.1016/S0969-9961(03)00043-3].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/15241
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