Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Protective effect of Acer okamotoanum from oxidative stress in C6 glial cells

우산고로쇠의 항산화 및 신경세포에서의 산화적 스트레스 개선 효과

  • Choi, Soo Yeon (Department of Food Science and Nutrition & Kimchi Research Institute, Pusan National University) ;
  • Kim, Ji Hyun (Department of Food Science and Nutrition & Kimchi Research Institute, Pusan National University) ;
  • Lee, Jaemin (Department of Integrative Plant Science, Chung-Ang University) ;
  • Lee, Sanghyun (Department of Integrative Plant Science, Chung-Ang University) ;
  • Cho, Eun Ju (Department of Food Science and Nutrition & Kimchi Research Institute, Pusan National University)
  • Received : 2017.02.27
  • Accepted : 2017.05.15
  • Published : 2017.06.30
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Abstract

Radical scavenging effect and protective activity against oxidative stress of Acer okamotoanum were investigated. A. okamotoanum was extracted with methanol (MeOH) and then fractionated with n-BuOH, ethyl acetate (EtOAc), methylene chloride and n-hexane fractions. The MeOH extract and fractions showed strong 1,1-diphenyl-2-picrylhydrazyl and superoxide radical scavenging activity. Among the MeOH extract and fractions, the EtOAc fraction showed the strongest radical scavenging activity. In addition, total phenolic and flavonoid contents of EtOAc fraction was higher than other extract and fractions. Furthermore, we investigated the neuroprotective effect of the MeOH extract and fractions from A. okamotoanum against oxidative stress under cellular system using C6 glial cell. The C6 glial cells showed a decrease in cell viability and high production of reactive oxygen species (ROS) by the treatment of amyloid $beta_{25-35}$ ($A{\beta}_{25-35}$). However, with the treatment of the MeOH extract and fractions, it significantly increased the cell viability and inhibited the overproduction of ROS by $A{\beta}_{25-35}$. In particular, the EtOAc fraction led to significantly increase the cell viability and decrease the generation of ROS against oxidative stress by $A{\beta}_{25-35}$. The current study indicated that A. okamotoanum demonstrated antioxidative and neuroprotective effects. In particular, the EtOAc fraction which attributed a strong protective activity against oxidative stress.

본 연구에서는 우산고로쇠(Acer okamotoaum) methanol (MeOH) 추출물과 n-BuOH, ethyl acetate (EtOAc), methylene chloride 및 n-hexane의 4종 분획물을 이용하여 free radical 소거능과 총 페놀, 플라보노이드 함량을 통한 항산화 효과를 측정하였으며, 신경교세포인 C6 glial cell을 이용하여 amyloid $beta_{25-35}$ ($A{\beta}_{25-35}$)에 의해 유도된 산화적 스트레스에서 신경세포 보호 효과에 대해 알아보았다. 그 결과 우산고로쇠 MeOH 추출물과 4가지 유기용매 추출 분획물은 우수한 1,1-diphenyl-2-picrylhydrazyl radical 소거능을 나타내었으며, 특히 EtOAc 분획물은 $4.47{\mu}g/mL$의 $EC_{50}$ 값을 나타내 가장 우수한 소거능을 가지고 있음을 확인할 수 있었다. Superoxide radical 소거능에서도 MeOH 추출물과 분획물은 높은 소거능을 보였으며, EtOAc 분획물은 $100{\mu}g/mL$ 농도에서 84.60%로 가장 높은 소거능을 나타내었다. 총 페놀과 플라보노이드 함량에서도 EtOAc 분획물은 다른 추출물과 분획물에 비해 월등히 높은 함량을 가지는 것으로 확인 되었다. 또한 $A{\beta}_{25-35}$에 의해 유발된 산화적 스트레스에서 우산고로쇠 MeOH 추출물과 4가지 유기용매 추출 분획물은 세포 생존율을 증가시켰으며, reactive oxygen species 생성을 감소 시키는 것으로 확인되었고 EtOAc 분획물이 가장 뛰어난 효과를 나타내었다. 본 연구 결과를 통해 우산고로쇠 MeOH 추출물과 4가지 유기용매 추출 분획물, 특히 EtOAc 분획물은 우수한 항산화 효과와 산화적 스트레스의 개선 효과를 가져 신경세포 보호에 효과가 있는 것으로 확인되었다.

Keywords

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