NDLI: Potent Upregulation of Glutathione and NAD(P)H:Quinone Oxidoreductase 1 by Alpha-lipoic Acid in Human Neuroblastoma SH-SY5Y Cells: Protection Against Neurotoxicant-elicited Cytotoxicity

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Potent Upregulation of Glutathione and NAD(P)H:Quinone Oxidoreductase 1 by Alpha-lipoic Acid in Human Neuroblastoma SH-SY5Y Cells: Protection Against Neurotoxicant-elicited Cytotoxicity

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Potent Upregulation of Glutathione and NAD(P)H:Quinone Oxidoreductase 1 by Alpha-lipoic Acid in Human Neuroblastoma SH-SY5Y Cells: Protection Against Neurotoxicant-elicited Cytotoxicity

Content Provider	Springer Nature Link
Author	Jia, Zhenquan Hallur, Seema Zhu, Hong Li, Yunbo Misra, Hara P.
Copyright Year	2007
Abstract	Alpha-lipoic acid (LA) has recently been reported to afford protective effects in neurodegenerative disorders. However, the mechanisms underlying LA-mediated neuroprotection remain to be investigated. This study was undertaken to determine whether LA treatment could increase endogenous antioxidants and phase 2 enzymes in cultured human neuroblastoma SH-SY5Y cells, and whether such increased cellular defenses could afford protection against cytotoxicity induced by neurotoxicants. Incubation of SH-SY5Y cells with micromolar concentrations of LA for 24 h resulted in a significant increase in the levels of reduced glutathione (GSH) and NAD(P)H:quinone oxidoreductase 1 (NQQ1) in a concentration-dependent fashion. Treatment of the cells with LA also led to an increased mRNA expression of γ-glutamylcysteine ligase catalytic subunit (GCLC) and NQO1. To determine the protective effects of the LA-induced cellular defenses on neurotoxicant-elicitedl cell injury, SH-SY5Y cells were pretreated with LA for 24 h and then exposed to acrolein, 4-hydroxy-2-nonenal (HNE), H$_{2}$O$_{2}$ and the peroxynitrite generator, 3-morpholinosydnonimine (SIN-1). We observed that LA pretreatment of SH-SY5Y cells led to a marked protection against acrolein, HNE, H$_{2}$O$_{2 }$and SIN-1-mediated cytotoxicity, as detected by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium reduction assay. Taken together, this study demonstrates for the first time that LA can induce GSH and NQO1 in cultured human neuroblastoma cells and LA-upregulated cellular defenses are accompanied by a markedly increased resistance to cytotoxicity induced by various neurotoxicants. The results of this study may have important implications for the neuroprotective effects of LA.
Starting Page	790
Ending Page	800
Page Count	11
File Format	PDF
ISSN	03643190
Journal	Neurochemical Research
Volume Number	33
Issue Number	5
e-ISSN	15736903
Language	English
Publisher	Springer US
Publisher Date	2007-10-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	SH-SY5Y cells Alpha-lipoic acid GSH NQO1 Antioxidants Acrolein, HNE, H$_{2}$O$_{2}$, SIN-1 Cytotoxicity Neurology Biochemistry Neurosciences
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry Cellular and Molecular Neuroscience

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