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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2005.1
- 수록면
- 115 - 125 (11page)
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초록· 키워드
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Objectives : Polygalae Radix (PR) from Polygalae tenuifolia (Polygalaceae) has been clinically used as a sedative, anti-inflammatory, and anti-bacterial agent. To extend pharmacological effects of PR in the central nervous system (CNS) on the basis of its CNS protective effect, the present study was conducted to identify the effect of PR, whether it shows the neuroprotective action against excitatory neurotoxicity. Methods : To identify the protective effect of PR to excitatory neuro-toxic agent, the present study was focused on the PR effect on cell death, that was caused by applying NMDA to nerve cell, elevation of $(Ca^{2+})_i$, releasement of glutamate, and ROS generation. Result : 1. PR methanol extract, at the concentration range of 0.05 to 5 g/ml, significantly inhibited NMDA (1 mM)-induced neuronal cell death as well as MK-801 (non competitive NMDA antagonist). 2. PR methanol extract $(0.5\;{\mu}g/ml)$ inhibited NMDA (1 mM)-induced elevation of cytosolic calcium concentration $[Ca^{2+}]_i$. NMDA application in the presence of MK-801 $(10\;{\mu}M)$ failed to produce the increase of $[Ca^{2+}]_i$ through all the measurement time. 3. PR methanol extract $(0.5\;{\mu}g/ml)$ inhibited the NMDA-induced elevation of glutamate release. Also, MK-801 showed similar protective effects. 4. PR methanol extract $(0.5\;{\mu}g/ml)$ inhibited the NMDA-induced elevation of ROS generation. Also, MK-801 showed similar protective effects. Conclusion : The present study provides the availability of PR to exert its protective effect on the neuronal cell death in various neurodegenerative pathophysiological conditions.
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