We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Effect of repeated restraint stress and clomipramine on Na<sup>+</sup>/K<sup>+</sup>-ATPase activity and behavior in rats
- Authors
Balk, Rodrigo de Souza; Silva, Michele Hinerasky da; Bridi, Jessika Cristina; Carvalho, Nelson Rodrigues; Portella, Rafael de Lima; Dobrachinski, Fernando; Amaral, Guilherme Pires; Barcelos, Rômulo; Dias, Glaecir Roseni Mundstock; Rocha, João Batista Teixeira da; Barbosa, Nilda Berenice Vargas; Soares, Felix Alexandre Antunes
- Abstract
Abstract: Activation of the limbic-hypothalamic-pituitary-adrenal axis (LHPA) and the release of glucocorticoids are fundamental for the adaptive response and immediate survival of an organism in reaction to acute stimuli. However, high levels of glucocorticoids in the brain may produce neuronal injury and a decrease of Na+/K+-ATPase activity, with effects on neurotransmitter signaling, neural activity, as well as the whole animal behavior. Clomipramine is a tricyclic antidepressant that inhibits the reuptake of serotonin and norepinephrine by indirect actions on the dopaminergic system and LHPA axis. Its chronic use increases the body''s ability to cope with stress; however, high doses can potentiate its side effects on memory, learning, and sensory motor function. The purpose of the present study was to compare the effect of repeated restraint stress and clomipramine treatment on Na+/K+-ATPase activity and on the behavior of male rats. Changes in the behavioral response were evaluated by measuring the memory, learning, anxiety, and exploratory responses. Our results showed that exposure to repeated restraint stress reduced levels of Na+/K+-ATPase in brain structures and changed short and long-term memory, learning, and exploratory response when compared to the control group. Exposure to clomipramine treatment increased anxiety levels and reduced Na+/K+-ATPase activity in the cerebral cortex as well as short term memory, learning, and exploratory response. In conclusion, the present results provide additional evidence concerning how repeated restraint stress and clomipramine chronically administered at higher dose levels affect the neural activity and behavior of male rats.
- Subjects
PHYSIOLOGICAL stress; HYPOTHALAMIC-pituitary-adrenal axis; BEHAVIORAL assessment; GLUCOCORTICOIDS; DRUG administration; LABORATORY rats
- Publication
International Journal of Developmental Neuroscience, 2011, Vol 29, Issue 8, p909
- ISSN
0736-5748
- Publication type
Article
- DOI
10.1016/j.ijdevneu.2011.06.010