- P-ISSN 1010-0695
- E-ISSN 2288-3339
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- P-ISSN1010-0695
- E-ISSN2288-3339
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Effects of Acori Graminei Rhizoma on Scopolamine-induced Amnesia in Rats
Journal of Korean Medicine / Journal of Korean Medicine, (P)1010-0695; (E)2288-3339
2008, v.29 no.5, pp.67-76
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(2008). Effects of Acori Graminei Rhizoma on Scopolamine-induced Amnesia in Rats. Journal of Korean Medicine, 29(5), 67-76.
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Abstract
Objectives:Amnesia is theloss or impairment of memory, caused by physical injury, disease, drugs, or emotional trauma. Recently, the average life span is increasing, while at the same time, the incidence of dementia-like diseases in conjunction with amnesia are also increasing. Therefore learning and memory are very important issues in modern society. Ancient Korean physicians used several herbs to treat dementia and these herbal effects were described in Korean herbal books. Among them are some reports on several cognitive-enhancing herbs which have since been shown to improve dementia in recent pharmacological studies, such as Panax ginseng; however, the facilitatory effects of many Korean cognitive-enhancing herbs on learning and memory are limited. Learning and memory are essential requirements for every living organism in order to cope with environmental demands; cholinergic systems are known to be involved in learning and memory. Methods:In this study, the effects of Acori graminei rhizoma (AGR, 石菖蒲) on learning and memory were investigated by Morris water maze, eight-arm radial maze, and the effects on the central cholinergic system of rats injected with scopolamine. Results:In the water maze, the experimental animals were trained to find a platform in a fixed position for 6 days and then received a 60 sec probe trial in which the platform was removed from the pool on the 7th day. In the eight-arm radial maze, the animals were tested four times per day for 6 days. Scopolamine impaired performance of the maze tests and reduced activity of acetylcholinesterase (AchE) in the hippocampus, which is a marker for the central cholinergic system. There were significant reversals from the scopolamine-induced deficits on learning and memory in these tests, through daily administrations of AGR (100 ㎎/㎏, p.o.) over 14 consecutive days. These treatments also reduced the loss of cholinergic activity in the hippocampus induced by scopolamine. Conclusions:These results demonstrated that AGR ameliorated learning and memory deficits by affecting the central acetylcholine system.
- keywords
- Acori Graminei Rhizoma, amnesia, acetylcholinesterase (AchE), Acori Graminei Rhizoma, amnesia, acetylcholinesterase (AchE)
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