생명과학회지 (Journal of Life Science)

  • 제27권7호
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  • Pages.796-804
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  • 2017
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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어성초 메탄올 추출물로부터 항산화 효능을 가진 활성물질의 확인

Identification of Antioxidant Compound Derived from Methanolic Extract of Houttuynia Cordata

  • Kim, Hyeji (Department of Chemistry, Dong-Eui University) ;
  • Hwang, Heesung (Department of Chemistry, Dong-Eui University) ;
  • Park, Sumin (Department of Chemistry, Dong-Eui University) ;
  • Kang, Sungwook (Department of Chemistry, Dong-Eui University) ;
  • Kim, Hyejeong (Department of Chemistry, Dong-Eui University) ;
  • Hong, Sugyeong (Department of Chemistry & Biology, Dong-Eui University) ;
  • Kim, Moon-Moo (Department of Applied Chemistry, Dong-Eui University) ;
  • Oh, Yunghee (Department of Applied Chemistry, Dong-Eui University)
  • 투고 : 2016.04.11
  • 심사 : 2016.07.17
  • 발행 : 2017.07.30
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초록

본 연구는 어성초의 메탄올 추출물을 이용하여 항산화 효능이 가장 좋은 fraction을 찾고, 항산화 효능을 나타내는 성분을 분석하였다. 메탄올 추출에 의한 유기 용매 별 분획에서 항산화 효과가 가장 좋은 ethyl acetate 분획물을 칼럼 크로마토그래피하여 12가지의 fraction 중 가장 높은 항산화 효과를 보인 Fr. 10을 이용하여 DPPH 라디칼의 소거활성, 환원력, 지질과산화, 세포독성, DNA 산화 및 DCFH-DA를 이용한 세포내 과산화수소 제거효과를 조사하였다. DPPH radical scavenging activity, reducing power, TBARS, cell viability, DNA oxidation and DCF fluorescence 12가지의 fraction들 중 항산화 효능이 가장 좋은 Fr. 10의 DPPH radical 소거 활성 결과로 $64{\mu}g/ml$ 농도에서 양성대조군에 근접하는 60%의 억제능을 보였다. Reducing power 결과로 $32{\mu}g/ml$의 농도에서 140%로 양성대조군과 비슷한 결과 값을 보였다. TBARS 결과로 $2{\mu}g/ml$에서 양성대조군과 같은 값의 활성산소 억제능이 나타난다. 또한 cell viability 결과로 $32{\mu}g/ml$ 이상의 농도에서 세포 독성에 의해 생존율이 감소하였고, DCF fluorescence 결과로 농도의존적으로 $H_2O_2$에 의한 산화적 손상을 억제하는 것으로 나타났다. DNA oxidation 실험결과 $1{\mu}g/ml$ 이상의 농도에서 DNA의 손상을 감소시킴을 확인할 수 있었다. IR 및 LC-MS를 이용하여 Fr. 10의 유효성분을 조사한 결과 rutin (분자량, 610)으로 확인 되었다. 결론적으로 어성초의 메탄올 추출물로부터 분리한 Fr. 10은 농도 의존적으로 항산화 효능이 우수하게 나타났고, 어성초는 화장품 및 기능성 식품의 소재로 활용될 수 있음을 시사한다.

This study was carried out to evaluate the antioxidant effect of methanolic extract of Houttuynia cordata (HCME) and to identify a compound having antioxidant effect. The ethyl acetate fraction of HCME showed the highest antioxidant effect in organic solvent fractions. The fraction was then separated into 12 fractions by open column chromatography. Among these fractions, the fraction 10 (Fr. 10) with the highest antioxidant activity was isolated, and its antioxidant effect was evaluated by DPPH radical scavenging activity, reducing power, TBARS, cell viability, DNA oxidation and DCF fluorescence. The Fr. 10 at a $64{\mu}g/ml$ showed 60% of inhibitory effect similar to that of vitamin C at $10{\mu}g/ml$, compared with blank group. The Fr. 10 at $64{\mu}g/ml$ showed 264% of reducing power, compared with blank group. TBARS assay showed that the Fr. 10 at $64{\mu}g/ml$ had 35.5% of inhibitory effect similar to that of vitamin E at $1,000{\mu}g/ml$, compared with blank group. The Fr. 10 above $32{\mu}g/ml$ displayed cytotoxicity. However, it was observed that the Fr. 10, above $1{\mu}g/ml$ reduced DNA damage. DCF fluorescence assay showed that the Fr. 10 inhibited oxidative stress by $H_2O_2$ in a dose dependent manner. The compound of Fr. 10 was identified to be rutin whose molecular weight is 610 by the IR and LC-MS analyses. Therefore, these results suggest that the rutin of Fr. 10 could use as a natural antioxidant for development of cosmetics and functional foods.

키워드

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