Alcohol hangover effects on brain cortex non-synaptic mitochondria and synaptosomes bioenergetics.
Alcohol
; 77: 113-123, 2019 06.
Article
en En
| MEDLINE
| ID: mdl-30385200
ABSTRACT
Alcohol hangover (AH) has been associated with oxidative stress and mitochondrial dysfunction. We herein postulate that AH-induced mitochondrial alterations can be due to a different pattern of response in synaptosomes and non-synaptic (NS) mitochondria. Mice received intraperitoneal (i.p.) injections of ethanol (3.8 g/kg) or saline and were sacrificed 6 h afterward. Brain cortex NS mitochondria and synaptosomes were isolated by Ficoll gradient. Oxygen consumption rates were measured in NS mitochondria and synaptosomes by high-resolution respirometry. Results showed that NS-synaptic mitochondria from AH animals presented a 26% decrease in malate-glutamate state 3 respiration, a 64% reduction in ATP content, 28-37% decrements in ATP production rates (malate-glutamate or succinate-dependent, respectively), and 44% inhibition in complex IV activity. No changes were observed in mitochondrial transmembrane potential (ΔΨ) or in UCP-2 expression in NS-mitochondria. Synaptosome respiration driving proton leak (in the presence of oligomycin), and spare respiratory capacity (percentage ratio between maximum and basal respiration) were 30% and 15% increased in hangover condition, respectively. Synaptosomal ATP content was 26% decreased, and ATP production rates were 40-55% decreased (malate-glutamate or succinate-dependent, respectively) in AH mice. In addition, a 24% decrease in ΔΨ and a 21% increase in UCP-2 protein expression were observed in synaptosomes from AH mice. Moreover, mitochondrial respiratory complexes I-III, II-III, and IV activities measured in synaptosomes from AH mice were decreased by 18%, 34%, and 50%, respectively. Results of this study reveal that alterations in bioenergetics status during AH could be mainly due to changes in mitochondrial function at the level of synapses.
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Texto completo:
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Bases de datos:
MEDLINE
Métodos Terapéuticos y Terapias MTCI:
Terapias_energeticas
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Bioenergetica
Asunto principal:
Sinaptosomas
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Corteza Cerebral
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Etanol
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Metabolismo Energético
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Consumo Excesivo de Bebidas Alcohólicas
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Mitocondrias
Idioma:
En
Revista:
Alcohol
Año:
2019
Tipo del documento:
Article
País de afiliación:
Argentina