Effect of Yukmijihwangtang on Learning and Memory Impairment in Transient Focal Cerebral Ischemia Rat Model

육미지황탕(六味地黃湯)이 국소뇌허혈유발 기억장애(記憶障碍) 모델 흰쥐에 미치는 영향

  • Kim, Ki-Hyun (Department of Pediatrics, College of Oriental Medicine, Dongguk University) ;
  • Min, Sang-Yeon (Department of Pediatrics, College of Oriental Medicine, Dongguk University) ;
  • Kim, Jang-Hyun (Department of Pediatrics, College of Oriental Medicine, Dongguk University)
  • 김기현 (동국대학교 한의과대학 소아과학교실) ;
  • 민상연 (동국대학교 한의과대학 소아과학교실) ;
  • 김장현 (동국대학교 한의과대학 소아과학교실)
  • Published : 2009.03.31

Abstract

Objectives: This study investigated the effect of Yukmijihwangtang on cerebral ischemia-induced learning and memory impairment by middle cerebral artery (MCA) occlusion in rats. Methods: The ability of learning and memory of rats was measured using the eight-arm radial maze and the passive avoidance test, and profile of cholinergic neuron was assessed in the medial septum and hippocampus region by immuno-histochemistry. Results: 1. No differences were found between groups in the number of correct choices in acquisition performance during the eight-arm radial maze task. 2. No differences were found between groups on day 1 in the error rate in acquisition performance, which is defined as the number of enters into the same arm more than once within five minutes. After 5 to 6 days of test, the number of errors was significantly reduced in the Yukmijihwangtang group (forebrain ischemia group with Yukmijihwangtang treatment), compared with the ischemia group. 3. The memory processes significantly improved in the Yukmijihwangtang group according to results of the passive avoidance test. 4. The appearance of AchE (acetylcholinesterase) in the CA1 region of hippocampus significantly decreased in the ischemia group, compared with the sham group (untreated group). The appearance of AchE in the same region significantly increased in the Yukmijihwangtang group, compared with the ischemia group. 5. The appearance of ChAT (choline acetyltransferase) in the CA1 region of the hippocampus and medial septum decreased in the ischemia group, compared with the sham group. The appearance of ChAT in the same region significantly increased in the Yukmijihwangtang group, compared with the ischemia group Conclusions: This study provides evidence that Yukmijihwangtang is effective for reviving the ability of learning and memory and damaged neurons in rats with experimental cerebral ischemia.

Keywords

References

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