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• W2090592586 abstract "The role of excitotoxicity in the cerebral damage of glutaryl-CoA dehydrogenase deficiency (GDD) is under intense debate. We therefore investigated the in vitro effect of glutaric (GA) and 3-hydroxyglutaric (3-OHGA) acids, which accumulate in GDD, on [(3)H]glutamate uptake by slices and synaptosomal preparations from cerebral cortex and striatum of rats aged 7, 15 and 30 days. Glutamate uptake was significantly decreased by high concentrations of GA in cortical slices of 7-day-old rats, but not in cerebral cortex from 15- and 30-day-old rats and in striatum from all studied ages. Furthermore, this effect was not due to cellular death and was prevented by N-acetylcysteine preadministration, suggesting the involvement of oxidative damage. In contrast, glutamate uptake by brain slices was not affected by 3-OHGA exposure. Immunoblot analysis revealed that GLAST transporters were more abundant in the cerebral cortex compared to the striatum of 7-day-old rats. Moreover, the simultaneous addition of GA and dihydrokainate (DHK), a specific inhibitor of GLT1, resulted in a significantly higher inhibition of [(3)H]glutamate uptake by cortical slices of 7-day-old rats than that induced by the sole presence of DHK. We also observed that both GA and 3-OHGA exposure did not alter the incorporation of glutamate into synaptosomal preparations from cerebral cortex and striatum of rats aged 7, 15 and 30 days. Finally, GA in vivo administration did not alter glutamate uptake into cortical slices from 7-day-old rats. Our findings may explain at least in part why cortical neurons are more vulnerable to damage at birth as evidenced by the frontotemporal cortical atrophy observed in newborns affected by GDD." @default.
• W2090592586 created "2016-06-24" @default.
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• W2090592586 date "2007-12-01" @default.
• W2090592586 modified "2023-10-18" @default.
• W2090592586 title "Evidence that glutaric acid reduces glutamate uptake by cerebral cortex of infant rats" @default.
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• W2090592586 doi "https://doi.org/10.1016/j.lfs.2007.09.021" @default.
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