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Ethanol exposed maturing rat cerebellar granule cells show impaired energy metabolism and increased cell death after oxygen-glucose deprivation

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Neural Regeneration Research 2019年第3期14卷 485-490页

作者： ana spataru Diana Le Duc Leon Zagrean ana-Maria Zagrean Division of Physiology and Neuroscience Carol Davila University of Medicine and Pharmacy King's College Hospital London UK Institute of Human Genetics University of Leipzig Hospitals and Clinics Leipzig GermanyDepartment of Evolutionary Genetics Max Planck Institute for Evolutionary Anthropology

Alcohol, a widely abused drug, has deleterious effects on the immature nervous system. This study investigates the effect of chronic in vitro ethanol exposure on the metabolism of immature rat cerebellar granular cells(CGCs) and on their response to oxygen-glucose deprivation(OGD). Primary CGC cultures were exposed to ethanol(100 mM in culture medium) or to control ethanol-free medium starting day one in vitro(DIV1). At DIV8, the expression of ATP synthase gene ATP5 g3 was quantified using real-time PCR, then cultures were exposed to 3 hours of OGD or normoxic conditions. Subsequently, cellular metabolism was assessed by a resazurin assay and by ATP level measurement. ATP5 g3 expression was reduced by 12-fold(P = 0.03) and resazurin metabolism and ATP level were decreased to 74.4 ± 4.6% and 55.5 ± 6.9%, respectively after chronic ethanol treatment compared to control values(P < 0.01). Additionally, after OGD exposure of ethanol-treated cultures, resazurin metabolism and ATP level were decreased to 12.7 ± 1.0% and 9.0 ± 2.0% from control values(P < 0.01). These results suggest that chronic ethanol exposure reduces the cellular ATP level, possibly through a gene expression down-regulation mechanism, and increases the vulnerability to oxygen-glucose deprivation. Thus, interventions which improve metabolic function and sustain ATP-levels could attenuate ethanol-induced neuronal dysfunction and should be addressed in future studies.

关键词： cell culture chronic ethanol exposure oxygen-glucose deprivation cerebellar granule cells toxicity gene expression cellular ATP cellular metabolism metabolic impairment cell death

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