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hypericum umbellatum/scopolamina
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Hypericum perforatum extract demonstrates antioxidant properties against elevated rat brain oxidative status induced by amnestic dose of scopolamine.
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This study was designed to investigate if the impairment of learning and memory induced by acute administration of scopolamine (1.4 mg/kg ip) in rats is associated with altered brain oxidative stress status. The passive avoidance paradigm was used to assess retrieval memory of rats after scopolamine
Hypericum perforatum as a nootropic drug: enhancement of retrieval memory of a passive avoidance conditioning paradigm in mice.
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Depression, among other non-cognitive symptoms, is common in patients with dementia. The effect of Hypericum perforatum (St. John's Wort) extract, with well-documented antidepressant activity, was tested on memory retrieval 24 h after training on a one-trial passive avoidance task in mice. Acute
Effects of Hypericum perforatum (St. John's wort) on passive avoidance in the rat: evaluation of potential neurochemical mechanisms underlying its antidepressant activity.
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Along with traditional pharmacotherapies, extracts of Hypericum perforatum L. (St. John's wort) are used in the treatment of mild to moderately severe depression. Hypericum is a nonspecific inhibitor of the neuronal uptake of monoamines (serotonin, 5-HT; noradrenaline, NA; dopamine, DA) as well as
Effect of Indian Hypericum perforatum Linn on animal models of cognitive dysfunction.
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The effect of a standardised 50% ethanolic extract of Indian Hypericum perforatum (IHp) was investigated for its putative nootropic activity on various experimental paradigms of learning and memory, viz. transfer latency (TL) on elevated plus-maze, passive avoidance (PA), active avoidance (AA),
Hypericum extract and hyperforin: memory-enhancing properties in rodents.
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Effects of a Hypericum extract in therapeutic use and hyperforin sodium salt were evaluated in rat and mouse avoidance tests. In a conditioned avoidance response (CAR) test on the rat, oral daily administration of hyperforin (1.25 mg/kg/day) or of the extract (50 mg/kg/day) before the training
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