The Effects of Achyranthis Radix on Short-term Memory and Apoptosis in the Hippocampus of the Gerbil with Transient Global Ischemia

우슬이 뇌허혈 유발 모래쥐의 해마에서 신경세포 사멸과 단기기억력에 미치는 영향

  • Yoon, Hyun-Seok (Dept. of Oriental Rehabilitation Medicine, Ja-Seng Oriental Medicine Hospital) ;
  • Song, Yun-Kyung (Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Kyung-Won University) ;
  • Lim, Hyung-Ho (Dept. of Oriental Rehabilitation Medicine, College of Oriental Medicine, Kyung-Won University)
  • 윤현석 (자생한방병원 한방재활의학과) ;
  • 송윤경 (경원대학교 한의과대학 한방재활의학과교실) ;
  • 임형호 (경원대학교 한의과대학 한방재활의학과교실)
  • Received : 2011.03.15
  • Accepted : 2011.03.29
  • Published : 2011.04.30

Abstract

Objectives : The present study investigated the effects of Achyranthis Radix on short-term memory, apoptotic neuronal cell death in the hippocampus following transient global ischemia in gerbils. Methods : The gerbils were divided into 5 groups(n=10); Sham operation group, ischemia-induced group, ischemia-induced and 50 mg/kg Achyranthis Radix-treated group, ischemia-induced and 100 mg/kg Achyranthis Radix-treated group, ischemia-induced and 200 mg/kg Achyranthis Radix-treated group. For this study, a step-down avoidance task, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling(TUNEL) assay, immunohistochemistry for caspase-3 and BrdU(5-Bromo-2'-deoxyuridine), and western blotting for bax, bcl-2 were performed. Results : The results revealed that ischemic injury impaired short-term memory and increased apoototic neuronal cell death in the hippocampal CA1(cornu ammonis area 1) region. Ischemic injury enhanced cell proliferation in the hippocampal CA1 region, the compensatory and adaptive process for excessive apoptosis. Achyranthis Radix treatment improved short-term memory by suppressing ischemia-induced apoptotic neuronal cell death in the hippocampal CA1 region. Also, Achyranthis Radix suppressed the ischemia-induced increase in cell proliferation in the hippocampal CA1 region. Conclusions : We showed that Achyranthis Radix alleviates ischemia-induced apoptotic neuronal cell death, thus facilitates the recovery of short-term memory impairment induced by ischemic cerebral injury.

Acknowledgement

Supported by : 경원대학교

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