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- W2003237166 abstract "In the central nervous system (CNS), astrocytes play an integral role in the maintenance of neuronal viability and function. Inflammation within the CNS increases the concentration of oxidative metabolites and, therefore, the potential for NAD depletion through increased poly-(ADP-ribose) polymerase (PARP) activity. However, the activity of indoleamine 2,3-dioxygenase (IDO), the rate limiting enzyme for de novo NAD synthesis, is also markedly increased in astrocytes during inflammation. This study investigated the role of IDO induction in the maintenance of intracellular NAD and its relationship to improved cell viability under conditions of increased oxidative stress in the human astroglioma cell line, HTB-138. Treatment with the pro-inflammatory cytokine IFN-γ increased IDO activity in these cells. Intracellular NAD levels also increased significantly after treatment with IFN-γ in the presence of a PARP inhibitor. Pretreatment of astroglial cells with IFN-γ significantly moderated both the drop in intracellular NAD concentration and cell death following exposure to hydrogen peroxide. These results suggest that induction of IDO and subsequent de novo NAD synthesis may contribute to the maintenance of intracellular NAD levels and cell viability under conditions of increased oxidative stress." @default.
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- W2003237166 date "2000-04-01" @default.
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- W2003237166 title "IDO induction in IFN-γ activated astroglia: A role in improving cell viability during oxidative stress" @default.
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- W2003237166 doi "https://doi.org/10.1179/135100000101535357" @default.
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