|Título||Evaluation of Na+, K+-ATPase activity in the brain of young rats after acute administration of fenproporex
Rezin, Gislaine Tezza
Gonçalves, Cinara L.
Ferreira, Gabriela K.
Cardoso, Mariane Ribeiro
Ferreira, Andréa Gisiane Kurek
Cunha, Maira Jaqueline da
Varela, Roger Bitencourt
Quevedo, João Luciano de
Wyse, Angela Terezinha de Souza
Streck, Emilio Luiz
|Abstract||Objectives: Fenproporex is an amphetamine-based anorectic which is rapidly converted into amphetamine in vivo. Na+, K+-ATPase is a membrane-bound enzyme necessary to maintain neuronal excitability. Considering that the effects of fenproporex on brain metabolism are poorly known and that Na+, K+-ATPase is essential for normal brain function, this study sought to evaluate the effect of this drug on Na+, K+-ATPase activity in the hippocampus, hypothalamus, prefrontal cortex, and striatum of young rats. Methods: Young male Wistar rats received a single injection of fenproporex (6.25, 12.5, or 25 mg/kg intraperitoneally) or polysorbate 80 (control group). Two hours after the last injection, the rats were killed by decapitation and the brain was removed for evaluation of Na+, K+-ATPase activity. Results: Fenproporex decreased Na+, K+-ATPase activity in the striatum of young rats at doses of 6.25, 12.5, and 25 mg/kg and increased enzyme activity in the hypothalamus at the same doses. Na+, K+-ATPase activity was not affected in the hippocampus or prefrontal cortex. Conclusion: Fenproporex administration decreased Na+, K+-ATPase activity in the striatum even in low doses. However, in the hypothalamus, Na+, K+-ATPase activity was increased. Changes in this enzyme might be the result of the effects of fenproporex on neuronal excitability.
|Contido em||Revista brasileira de psiquiatria (1999). São Paulo. Vol. 36, no. 2 (abr./jun. 2014), p. 138-142
ATPase trocadora de sódio-potássio
[en] K+-ATPase activity
|Tipo||Artigo de periódico
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