Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effect of Curcuma longa Hot Water Extract on Activity of Neuronal Cells Related to Oxidative Stress

산화적 스트레스와 관련하여 신경세포의 활성에 미치는 강황 열수추출물의 영향에 대한 연구

  • Received : 2012.03.19
  • Accepted : 2012.04.10
  • Published : 2012.05.30
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Abstract

The aim of this study is to screen a therapeutic agent with a cognitive function. The inhibitory effect of $Curcuma$ $longa$ hot water extract (CLWE) on the angiotension-converting enzyme and acetylcholinesterase derived from rabbit lungs and neural cells (PC12), as well as its antioxidant effect, was investigated in this study. Thus, for the first time, the direct scavenging effect of CLWE on DPPH radicals, superoxide anions, hydroxyl radicals, lipid peroxidation, reducing power, and the protective effect of DNA oxidation related to oxidative stress was evaluated in vitro. In addition, it was observed that CLWE especially exhibited a scavenging effect on reducing power and superoxide anions in this study. CLWE showed a protective effect on DNA oxidation produced by hydroxyl radicals. Furthermore, CLWE inhibited the activity of angiotensin-converting enzymes above 0.25%. Additionally, the extract inhibited oxidative stress and inducible nitric oxide in neuronal cells. Therefore, these results demonstrated that CLWE has antioxidant activity and neuronal cell protective effects, suggesting that it may have great potential as a natural source for human health.

본 연구의 목적은 인지기능을 가진 약효제를 발굴하는 것이다. 본 연구에서는 토끼의 간과 신경세포로부터 각각 유래한 angiotension converting enzyme과 acetylcholinesterase에 대한 강황 열수추출물(CLWE)의 억제효과 뿐만 아니라 항산화 효과가 조사되었다. 이리하여 먼저 산화적 스트레스와 연관이 있는 환원력과 DPPH radical, superoxide anion, hydroxyl radical, lipid peroxidation에 대한 CLEW의 소거능 및 DNA 산화에 대한 보호효과를 평가하였다. CLEW는 환원력 뿐만 아니라 본 연구에서 시험된 활성산소종 중에서 특히 superoxide anion의 소거능이 가장 우수한 것으로 나타났다. 더욱이 CLEW는 0.25% 이상의 농도에서 angiotensin converting enzyme 활성을 억제효과를 발휘하는 것으로 나타났다. 신경세포에서 CLEW는 또한 산화적 스트레스와 nitric oxide 유발을 억제하였다. 그러므로 이상의 결과는 CLEW의 항산화 효과와 신경세포 보호효과를 입증하여, 이것이 사람의 신경건강을 위한 천연생물소재로 잠재적인 가능성을 가지고 있을 것으로 시사한다.

Keywords

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