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Ameliorating Effects of the Cognitive-Enhancing Korean Herbs on Neurotoxic-Induced Amnesia in Rats  

Kim Ji Hyun (Department of Oriental Medical Science. Graduate School of East-West Medical Science, Kyunghee University)
Jung Jin Yong (Department of Oriental Medical Science. Graduate School of East-West Medical Science, Kyunghee University)
Chae Yoon Byung (Department of Oriental Medical Science. Graduate School of East-West Medical Science, Kyunghee University)
Hahm Dae Hyun (Department of Oriental Medical Science. Graduate School of East-West Medical Science, Kyunghee University)
Park Yang Jin (Bak Nam Oriental Medical Clinic)
Lee Hye Jung (Department of Oriental Medical Science. Graduate School of East-West Medical Science, Kyunghee University)
Shim Insop (Department of Oriental Medical Science. Graduate School of East-West Medical Science, Kyunghee University)
Publication Information
Journal of Physiology & Pathology in Korean Medicine / v.16, no.2, 2002 , pp. 303-310 More about this Journal
Abstract
Ancient Korean physicians have used several oriental herbs to cure dementia and these effects were described in the Korean herbal books. Some cognitive-enhancing oriental herbs have been widely used as a herbal medicine against dementia. However, few of studies have proved their efficacy in treatment for dementia. In the present study, we investigated the effects of herbal compounds, which are mainly consisted of Uncaria sinensis, Corydalis yanhusuo and Acorus gramineus on learning and memory in Mortis water maze task and the central cholinergic system of the rats with neurotoxic medial septum lesion. In water maze test, the animals were trained to find a platform in a fixed position during 6 days and then received a 60-s probe trial in which the platform was removed from the pool on the 7th day. Ibotanic and 192 saporin lesion of the medial septum (MS) impaired the performance of maze test and degenerated choline acetyltransferase (ChAT) in the brain, which is a marker of the central cholinergic system. Daily administrations of herbal medicine (100mg/kg, p.o.) for 21 consecutive days produced significant reversals of the neurotoxic-induced deficit in learning and memory. These treatments also reduced the loss of cholinergic immunoreactive neurons in the brain induced by neurotoxin. These results demonstrated that herbal compounds ameliorated learning and memory deficits through effects on the central nervous system, partly through effect on the acetylcholine system. Our studies suggest an evidence of these herbs as treatment of Alzheimer's disease.
Keywords
learning and memory; Alzheimer's disease; ibotenic lesion; ChAT; herbal medicine;
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