Repeated Cycles of Binge-Like Ethanol Intake in Adolescent Female Rats Induce Motor Function Impairment and Oxidative Damage in Motor Cortex and Liver, but Not in Blood

青春期雌性大鼠反复摄入暴饮暴食样乙醇会导致运动功能障碍以及运动皮质和肝脏的氧化损伤,但不会对血液造成影响

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作者:Luanna Melo Pereira Fernandes, Klaylton Sousa Lopes, Luana Nazaré Silva Santana, Enéas Andrade Fontes-Júnior, Carolina Heitmann Mares Azevedo Ribeiro, Márcia Cristina Freitas Silva, Ricardo Sousa de Oliveira Paraense, Maria Elena Crespo-López, Antônio Rafael Quadros Gomes, Rafael Rodrigues Lima, Mar

Abstract

Moderate ethanol consumption (MEC) is increasing among women. Alcohol exposure usually starts in adolescence and tends to continue until adulthood. We aimed to investigate MEC impacts during adolescence until young adulthood of female rats. Adolescent female Wistar rats received distilled water or ethanol (3 g/kg/day), in a 3 days on-4 days off paradigm (binge drinking) for 1 and 4 consecutive weeks. We evaluate liver and brain oxidative damage, peripheral oxidative parameters by SOD, catalase, thiol contents, and MDA, and behavioral motor function by open-field, pole, beam-walking, and rotarod tests. Our results revealed that repeated episodes of binge drinking during adolescence displayed lipid peroxidation in the liver and brain. Surprisingly, such oxidative damage was not detectable on blood. Besides, harmful histological effects were observed in the liver, associated to steatosis and loss of parenchymal architecture. In addition, ethanol intake elicited motor incoordination, bradykinesia, and reduced spontaneous exploratory behavior in female rats.

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