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• W2017522921 endingPage "475" @default.
• W2017522921 startingPage "465" @default.
• W2017522921 abstract "Cerebellar granule neurons undergo apoptosis when deprived of chronic depolarization; serum deprivation has not been considered as a trigger of apoptosis in this culture. Here we report that serum removal triggers cell injury, which is characterized by signs of apoptosis. Actual cell death (trypan blue permeability) occurred 24 and 48 hr after serum removal. At earlier times (6 and 8 hr after serum removal) we found significant impairment of mitochondrial functioning [3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay] and an increase in the percentage of neurons showing signs of DNA fragmentation (insitu terminal deoxynucleotidyl transferase assay, fluorescent assay). Protection was obtained by inhibiting RNA synthesis with actinomycin D and by antioxidants [1mM: 1,4-diazobicyclo(2.2.2)octane, histidine, mannitol; 1% dimethyl sulfoxide; 0.01-1 microM ascorbic acid]. We also measured neuronal oxidation utilizing the oxidation-sensitive fluorescent dye 2', 7'-dichloro- fluorescin diacetate, and found a significant increase in the rate of neuronal oxidation as early as 15 min after serum deprivation. The blockade of glutamate receptors by (+)-5-methyl-10,11-dihydroxy-5H-dibenzo(a,d)cyclohepten-5,10-imine (MK-801) and 6-cyano-7-nitroquinoxaline-2,3-dione also provided neuroprotection. However, oxidative stress appears to precede glutamate receptor activation: within the 8 hr period of serum deprivation, mannitol was protective when present either during only the first or last 4 hr; MK-801 was protective only when present for the entire 8 hr period or in the last, but not first 4 hr of serum deprivation. Serum deprivation of mature cerebellar granule neurons can be used to study mechanisms of oxidative stress-induced apoptosis." @default.
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• W2017522921 date "1996-02-15" @default.
• W2017522921 modified "2023-10-15" @default.
• W2017522921 title "Removal of serum from primary cultures of cerebellar granule neurons induces oxidative stress and DNA fragmentation: Protection with antioxidants and glutamate receptor antagonists" @default.
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• W2017522921 doi "https://doi.org/10.1002/(sici)1097-4547(19960215)43:4<465::aid-jnr7>3.0.co;2-d" @default.
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