Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effect of Hydropsyche kozhantschikovi Extracts on Oxidative Stress

줄날도래 추출물이 산화적 스트레스에 미치는 영향

  • Park, Young Mi (Department of Biological Science, Andong National University) ;
  • Lim, Jae Hwan (Department of Biological Science, Andong National University) ;
  • Lee, Jong Eun (Department of Biological Science, Andong National University) ;
  • Seo, Eul Won (Department of Biological Science, Andong National University)
  • 박영미 (안동대학교 자연과학대학 생명과학과) ;
  • 임재환 (안동대학교 자연과학대학 생명과학과) ;
  • 이종은 (안동대학교 자연과학대학 생명과학과) ;
  • 서을원 (안동대학교 자연과학대학 생명과학과)
  • Received : 2012.10.11
  • Accepted : 2013.01.09
  • Published : 2013.01.30
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Abstract

The present study aimed to investigate effects of ethanol extracts from Hydropsyche kozhantschikovi on cell and DNA damage caused by oxidative stress. In a radical scavenging assay, compared with ascorbic acid used as a control, the level of DPPH (1,1-diphenyl-2-picrylhydrazyl) and that of hydroxyl radicals in H. kozhantschikovi extracts were 60.0% and 43.7%, respectively. The ferrous iron chelating level was 37.5% compared to the chelating value of EDTA (ethylenediaminetetraacetic acid) as a positive control at the same concentration. To verify inhibitory effects of oxidative cell damage induced by reactive oxygen species (ROS), the relative level of lipid peroxidation and the expression level of the p21 protein were compared in extracts-treated and untreated groups. Lipid peroxidation was completely inhibited in the extracts-treated group compared with the radical-only treated group. The level of p21 protein expression was restored to 92.2% of p21 protein expression in the control sample. In addition, DNA cleavage inhibition in the H. kozhantschikovi extracts was 74.1% compared with that of the control group, suggesting that H. kozhantschikovi extracts repress DNA cleavage induced by ROS. Moreover, the phosphorylation ratio of the H2AX protein was 16.7% in the radical-treated group, indicating that the ethanol extracts inhibited 83.3% of DNA damage. Our findings suggest that ethanol extracts from H. kozhantschikovi are effective not only in repressing the oxidation of free radicals and highly toxic hydroxyl radicals, but also in decreasing cell and DNA damage caused by oxidative stress.

본 연구는 줄날도래(Hydropsyche kozhantschikovi) 에탄올 추출물이 산화적 스트레스에 미치는 영향을 알아보기 위해 활성산소에 의한 세포와 DNA의 손상 억제력을 조사하였다. 줄날도래 에탄올 추출물의 DPPH 유리 라디칼과 수산화 라디칼 제거능은 대조군에 비해 각각 60.4%, 60.0%로 나타났으며, $Fe^{2+}$-chelating 효과는 37.5%로 조사되었다. 줄날도래 추출물이 활성산소에 의해 유도되는 세포손상에 미치는 억제 효과를 조사하기 위해 지질과산화의 상대적 수준과 p21 단백질의 발현율을 해보면 줄날도래 추출물은 라디칼 처리군에 비해 지질과산화를 거의 완벽하게 억제하고 있으며, p21 단백질의 발현은 대조군의 92.2%로 회복되는 것으로 조사되었다. 또한 줄날도래 추출물의 DNA 분절화 억제 활성은 대조군에 비해 74.1%로 나타나 산화적 스트레스에 의해 유발되는 DNA 분절화를 효율적으로 억제하고 있으며, H2AX 단백질의 인산화비는 라디칼 처리군의 16.7%에 해당하는 수준으로 조사되어 줄날도래 추출물은 히스톤 단백질의 인산화를 83.3% 억제하는 것으로 확인되었다. 이러한 결과로 보아 줄날도래 추출물은 활성산소에 대한 항산화 효과 뿐만 아니라 세포와 DNA의 손상을 억제하는데 효과적인 것으로 사료된다.

Keywords

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