Training in inhibitory avoidance causes a reduction of Na+,K+-ATPase activity in rat hippocampus |
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Authors: | Wyse Angela T S Bavaresco Caren S Reis Eleonora A Zugno Alexandra I Tagliari Bárbara Calcagnotto Thiago Netto Carlos A |
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Affiliation: | Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde (ICBS), Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, CEP 90035-003, Porto Alegre, RS, Brazil. wyse@ufrgs.br |
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Abstract: | Compelling evidence has indicated the involvement of Na(+),K(+)-ATPase in the mechanisms of synaptic plasticity. In the present study, we investigated the effect of inhibitory avoidance training on Na(+),K(+)-ATPase activity, at different times after training, in the rat hippocampus. Male adult Wistar rats were trained in a step-down inhibitory avoidance task and compared to those submitted to isolated footshock (0.4 mA) or placed directly onto the platform. Na(+),K(+)-ATPase activity decreased, by 60%, in hippocampus of rats sacrificed immediately after the isolated footshock, as well as immediately (0 min) and 6 h after training; this effect was not present 24 h after training. We also verified that enzyme activity was not altered in rats killed after just being on the platform. These findings suggest that Na(+),K(+)-ATPase activity may be involved in the memory consolidation of step-down inhibitory avoidance in the hippocampus. |
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Keywords: | Na+,K+-ATPase Inhibitory avoidance Memory Consolidation Retrieval |
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