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- Title
Chronic ethanol exposure during adolescence through early adulthood in female rats induces emotional and memory deficits associated with morphological and molecular alterations in hippocampus.
- Authors
Oliveira, Ana CA; Pereira, Maria CS; Santana, Luana N da Silva; Fernandes, Rafael M; Teixeira, Francisco B; Oliveira, Gedeão B; Fernandes, Luanna MP; Fontes-Júnior, Enéas A; Prediger, Rui D; Crespo-López, Maria E; Gomes-Leal, Walace; Lima, Rafael R; Maia, Cristiane do Socorro Ferraz
- Abstract
There is increasing evidence that heavy ethanol exposure in early life may produce long-lasting neurobehavioral consequences, since brain structural maturation continues until adolescence. It is well established that females are more susceptible to alcohol-induced neurotoxicity and that ethanol consumption is increasing among women, especially during adolescence. In the present study, we investigated whether chronic ethanol exposure during adolescence through early adulthood in female rats may induce hippocampal histological damage and neurobehavioral impairments. Female rats were treated with distilled water or ethanol (6.5 g/kg/day, 22.5% w/v) by gavage from the 35th–90th day of life. Ethanol-exposed animals displayed reduced exploration of the central area and increased number of fecal boluses in the open field test indicative of anxiogenic responses. Moreover, chronic high ethanol exposure during adolescence induced marked impairments on short-term memory of female rats addressed on social recognition and step-down inhibitory avoidance tasks. These neurobehavioral deficits induced by ethanol exposure during adolescence through early adulthood were accompanied by the reduction of hippocampal formation volume as well as the loss of neurons, astrocytes and microglia cells in the hippocampus. These results indicate that chronic high ethanol exposure during adolescence through early adulthood in female rats induces long-lasting emotional and memory deficits associated with morphological and molecular alterations in the hippocampus.
- Subjects
HIPPOCAMPUS (Brain); ETHANOL; NEUROTOXICOLOGY; PSYCHIATRIC drugs; LABORATORY rats
- Publication
Journal of Psychopharmacology, 2015, Vol 29, Issue 6, p712
- ISSN
0269-8811
- Publication type
Article
- DOI
10.1177/0269881115581960