Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Antioxidative Activity and Component Analysis of Broussonetia kazinoki SIEB Extracts

닥나무 추출물의 항산화 활성 및 성분 분석

  • Park, Su Ah (Department of Fine Chemistry, Nanobiocosmetic Laboratory and Cosmetic R&D Center, Seoul National University of Science and Technology) ;
  • Ha, Ji Hoon (Department of Fine Chemistry, Nanobiocosmetic Laboratory and Cosmetic R&D Center, Seoul National University of Science and Technology) ;
  • Park, Soo Nam (Department of Fine Chemistry, Nanobiocosmetic Laboratory and Cosmetic R&D Center, Seoul National University of Science and Technology)
  • 박수아 (서울과학기술대학교 정밀화학과 나노바이오화장품연구실, 화장품종합기술연구소) ;
  • 하지훈 (서울과학기술대학교 정밀화학과 나노바이오화장품연구실, 화장품종합기술연구소) ;
  • 박수남 (서울과학기술대학교 정밀화학과 나노바이오화장품연구실, 화장품종합기술연구소)
  • Published : 2013.04.10
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Abstract

In this study, the antioxidative activities and component analysis of Broussonetia kazinoki SIEB (B. kazinoki). extracts were investigated. B. kazinoki extract showed the effective free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity ($FSC_{50}=8.53{\mu}g/mL$). Reactive oxygen species (ROS) scavenging activity ($OSC_{50}$) of the ethyl acetate fraction of B. kazinoki. extracts in the luminol-dependent $Fe^{3+}-EDTA/H_2O_2$ system was $1.69{\mu}g/mL$. The ethyl acetate fraction of B. kazinoki. extracts also exhibited more prominent cellular protective effects (${\tau}_{50}$, 183.3 min at $10{\mu}g/mL$) than that of typical antioxidant $\alpha$-tocopherol (${\tau}_{50}$ = 38.00 min) in the $^1O_2$-induced photohemolysis of human erythrocytes. Components of the ethyl acetate fraction obtained from B. kazinoki extracts were analyzed by TLC, HPLC chromatogram, LC/ESI-MS/MS and $^1H$-NMR. Consequently, Components, components were identified as the kazinol J of kazinol series and luteolin (2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-4-chromenone) of flavonoid series having antioxidant activities. These results indicate that extract/ fraction of B. kazinoki can be used as antioxidants in biological systems, particularly skins exposed to UV radiation by quenching and/or scavenging $^1O_2$ and other ROS, and protecting cellular membranes against ROS. Thus, the extract/fraction of B. kazinoki could be applicable to new cosmeceuticals.

본 연구에서는 닥나무 추출물의 항산화 활성과 성분 분석에 관한 연구를 실시하였다. 닥나무 추출물은 우수한 free radical(1,1-diphenyl-2-picrylhydrazyl, DPPH) 소거활성($FSC_{50}=8.53{\mu}g/mL$)을 나타내었다. Luminol-의존성 화학발광법을 이용한 $Fe^{3+}-EDTA/H_2O_2$계에서 생성된 활성 산소종(reactive oxygen species, ROS)에 대한 에틸아세테이트 분획의 총항산화능(OSC50)은 $1.69 {\mu}g/mL$이었다. 닥나무 추출물에 대하여 $^1O_2$으로 유도된 사람 적혈구의 광용혈 실험 결과 에틸아세테이트분획은 $10{\mu}g/mL$의 낮은 농도에서 ${\tau}_{50}$이 183.3 min으로 대표적인 항산화 물질로 알려진 $\alpha$-tocopherol (${\tau}_{50}$ = 38.00 min)보다 매우 큰 세포보호 효과를 나타내었다. TLC, HPLC, LC/ESI-MS/MS 및 $^1H$-NMR을 이용하여 닥나무 추출물 에틸아세테이트 분획의 성분 분석을 수행하였다. 그 결과, 닥나무 추출물 에틸아세테이트 분획은 kazinol류의 kazinol J와 플라보노이드류인 luteolin을 함유하고 있음을 확인하였다. 이상의 결과들은 닥나무 추출물이 $^1O_2$ 혹은 다른 ROS를 소광시키거나 소거함으로써, 또는 이에 대항하여 세포막을 보호함으로써, 생체계 특히 태양 자외선에 노출된 피부에서 항산화제로서 작용할 수 있음을 가리키며 기능성 화장품 원료로서 응용 가능성이 있음을 시사한다.

Keywords

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