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- 저자 : 정민찬 ( Min Chan Chung ) (검색결과 1 건)
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원지(遠志)가 만성적 뇌혈류저하 흰쥐의 β-Amyloid 축적과 기억장애에 미치는 영향
손영하 ( Young Ha Son ),김성재 ( Sung Jae Kim ),정민찬 ( Min Chan Chung ),조동국 ( Dong Guk Cho ),조우성 ( Woo Sung Cho ),신정원 ( Jung Won Shin ),박동일 ( Dong Il Park ),손낙원 ( Nak Won Sohn ) 대한본초학회 2014 大韓本草學會誌 Vol.29 No.6
Objectives : This study was investigated the effects of the root of Polygala tenuifolia (POL) on learning and memory impairment induced by chronic cerebral hypoperfusion in rats. Methods : Chronic cerebral hypoperfusion was produced by permanent bilateral common carotid artery occlusion (pBCAO). POL was administered orally once a day (130 mg/kg of water-extract) for 28 days starting at 4 weeks after the pBCAO. The acquisition of learning and the retention of memory were tested on 9th week after the pBCAO using the Morris water maze. In addition, effects of POL on Aβ generation and expressions of APP and BACE1 were observed in the hippocampus of rats. Results : POL significantly prolonged the swimming time spent in target quadrant and significantly reduced the swimming time spent in the quadrant far from the target. POL significantly increased the percentage of swim in the targer quadrant in the retention test, while POL was not effective on the escape latencies in the acquisition training trials. POL significantly reduced the levels of Aβ(1-40) and Aβ(1-42) in the cerebral cortex and the level of Aβ(1-42) in the hippocampus produced by chronic cerebral hypoperfusion. POL also significantly attenuated the up-regulation of APP and BACE1 expression in the hippocampus produced by chronic cerebral hypoperfusion. Conclusions : The results show that POL alleviated memory deficit and up-regulation of Aβ and BACE1 expressions in the hippocampus. This result suggests that POL may exert ameliorating effect on memory deficit through inhibition of β-secretase activity and Aβ generation.
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