alexa The ameliorating effects of LiuWei Dihuang Wang on cycloheximide-induced impairment of passive avoidance performance in rats.
Pharmaceutical Sciences

Pharmaceutical Sciences

Pharmaceutica Analytica Acta

Author(s): Wu CR, Lin LW, Wang WH, Hsieh MT

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Abstract The ameliorating effects of aqueous and ethanolic extracts of LiuWei Dihuang Wang (LDW(W) and LDW(E)) after single, 1-week or 2-week consecutive treatment on the cycloheximide-induced amnesia by using the passive avoidance task in rats were studied. After single treatment, LDW(W) and LDW(E) (1 and 2g/kg) significantly prolonged the shortened step-through latency induced by CXM and their potency was equal. LDW(W) at 1g/kg after 1-week consecutive treatment or at 0.1g/kg after 2-week consecutive treatment almost completely reversed CXM-induced amnesia. LDW(W) at any dose alone after single, 1-week or 2-week consecutive treatment did not influence the step-through latency in the training trial in rats. Furthermore, muscarinic antagonist scopolamine, peripheral cholinergic antagonist scopolamine methylbromide, serotonin precursor 5-hydroxytryptamine and serotonin releaser p-chloroamphetamine could block the ameliorating effects of LDW(W). GABA(A) receptor antagonist bicuculline and GABA(B) receptor agonist baclofen also blocked the ameliorating effects of LDW(W). These results suggest that the ameliorating effects of LDW whose potency were parallel to treatment duration might be related to activating peripheral cholinergic neuronal system and modulating the central nervous system. This article was published in J Ethnopharmacol and referenced in Pharmaceutica Analytica Acta

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