Long-lasting monoaminergic and behavioral dysfunctions in a mice model of socio-environmental stress during adolescence.

Autor: de Lima AP; Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo, Brazil. Electronic address: paulanlima@gmail.com., Sandini TM; Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil. Electronic address: thaisasandini@gmail.com., Reis-Silva TM; Department of Neuroscience and Behavior, Psychology Institute, University of São Paulo, São Paulo, Brazil. Electronic address: thiago.mreis@usp.br., Massoco CO; Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo, Brazil. Electronic address: cmassoco@gmail.com.
Jazyk: angličtina
Zdroj: Behavioural brain research [Behav Brain Res] 2017 Jan 15; Vol. 317, pp. 132-140. Date of Electronic Publication: 2016 Sep 15.
DOI: 10.1016/j.bbr.2016.09.024
Abstrakt: Adolescence is one of the critical periods of development and has great importance to health for an individual as an adult. Stressors or traumatic events during this period are associated with several psychiatric disorders as related to anxiety or depression and cognitive impairments, but whether negative experiences continue to hinder individuals as they age is not as well understood. We determined how stress during adolescence affects behavior and neurochemistry in adulthood. Using an unpredictable paradigm (2 stressors per day for 10days) in Balb/c mice, behavioral, hormonal, and neurochemical changes were identified 20days after the cessation of treatment. Adolescent stress increased motor activity, emotional arousal and vigilance, together with a reduction in anxiety, and also affected recognition memory. Furthermore, decreased serotonergic activity on hippocampus, hypothalamus and cortex, decreased noradrenergic activity on hippocampus and hypothalamus, and increased the turnover of dopamine in cortex. These data suggest behavioral phenotypes associated with emotional arousal, but not depression, emerge after cessation of stress and remain in adulthood. Social-environmental stress can induce marked and long-lasting changes in HPA resulting from monoaminergic neurotransmission, mainly 5-HT activity.
(Copyright © 2016 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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