Uliginosin B, a natural phloroglucinol derivative with antidepressant-like activity, increases Na+,K+-ATPase activity in mice cerebral cortex

AUTOR(ES)

Stein, Ana C., Müller, Liz G., Ferreira, Andréa G.K., Braga, Andressa, Betti, Andresa H., Centurião, Fernanda B., Scherer, Emilene B., Kolling, Janaína, Poser, Gilsane L. von, Wyse, Angela T.S., Rates, Stela M.K.

FONTE

Rev. bras. farmacogn.

DATA DE PUBLICAÇÃO

2016-10

RESUMO

ABSTRACT Uliginosin B, a phloroglucinol isolated from Hypericum polyanthemum Klotzsch ex Reichardt, Hypericaceae, has antidepressant-like effect in the forced swimming test in rodents and inhibits monoamines neuronal reuptake without binding to their neuronal carriers. Studies showed the involvement of Na+,K+-ATPase brain activity in depressive disorders, as well as the dependence of neuronal monoamine transport from Na+ gradient generated by Na+,K+-ATPase. This study aimed at evaluating the effect of uliginosin B on Na+,K+-ATPase activity in mice cerebral cortex and hippocampus (1 and 3 h after the last administration) as well as the influence of veratrine, a Na+ channel opener, on the antidepressant-like effect of uliginosin B. Mice were treated (p.o.) with uliginosin B single (10 mg/kg) or repeated doses (10 mg/kg/day, 3 days). Acute administration reduced the immobility in the forced swimming test and tail suspension test and increased Na+,K+-ATPase activity in cerebral cortex 1 h after treating, whereas the repeated treatment induced the antidepressant-like effect and increased the Na+,K+-ATPase activity at both times evaluated. None treatment affected the hippocampus enzyme activity. Veratrine pretreatment prevented uliginosin B antidepressant-like effect in the forced swimming test, suggesting the involvement of Na+ balance regulation on this effect. Altogether, these data indicate that uliginosin B reduces the monoamine uptake by altering Na+ gradient.

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