title: Effects of Yukmijihwang-tang derivatives (YMJd) on ibotenic acid-induced amnesia in the rat.
abstract: The present study investigates the effects of Yukmijihwang-tang Derivatives (YMJd) on learning and memory through the Morris water maze task and the central cholinergic system of rats with excitotoxic medial septum (MS) lesion. In the water maze test, the animals were trained to find a platform in a fixed position for 6 d and then received a 60-s probe trial in which the platform was removed from the pool on the 7th day. Ibotenic lesion of the MS showed the impaired performance in the Morris water maze test and severe cell losses in the MS, as indicated by decreased choline acetyltransferase-immunoreactivity in the medial septum. Daily administrations of YMJd (100 mg/kg, i.p.) for 21 consecutive days produced significant reversals of ibotenic acid-induced deficit in learning and memory. These treatments also reduced the loss of choline acetyltransferase (ChAT) immunoreactivity in the MS induced by ibotenic acid. These results suggest that impairments of spatial learning and memory might be attributable to the degeneration of septohippocampal cholinergic (SHC) neurons and that YMJd treatment ameliorated learning and memory deficits partly due through neuroprotective effects on the central acetylcholine system. Our studies suggest that YMJd might be useful in the treatment of Alzheimer's disease.
authors.affiliation: Purimed R&D Institute, Kyung-Hee University, Seoul, Korea.
authors.forename: Moonkyu
authors.initials: M
authors.lastname: Kang
authors.forename: Ji-Hyun
authors.initials: JH
authors.lastname: Kim
authors.forename: Chongwoon
authors.initials: C
authors.lastname: Cho
authors.forename: Kwang-Yeun
authors.initials: KY
authors.lastname: Lee
authors.forename: Minkyu
authors.initials: M
authors.lastname: Shin
authors.forename: Moochang
authors.initials: M
authors.lastname: Hong
authors.forename: Insop
authors.initials: I
authors.lastname: Shim
authors.forename: Hyunsu
authors.initials: H
authors.lastname: Bae
mesh_terms: D000647:Amnesia / Q000139:chemically induced* / Q000517:prevention & control*; D000818:Animals; D002795:Choline O-Acetyltransferase / Q000187:drug effects / Q000378:metabolism; D004195:Disease Models, Animal; D007051:Ibotenic Acid / Q000633:toxicity*; D008297:Male; D018782:Maze Learning / Q000187:drug effects*; D010936:Plant Extracts / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D010936:Plant Extracts; D007051:Ibotenic Acid; D002795:Choline O-Acetyltransferase