Screening of Peroxynitrite and DPPH Raoical Scavenging Activities from Salt Marsh Plants

염생식물로부터 Peroxynitrite와 DPPH 라디칼 소거 활성 검색

  • 서영완 (한국해양대학교 해양과학부) ;
  • 이희정 (한국해양대학교 해양과학기술연구소) ;
  • 김유아 (한국해양대학교 해양과학부) ;
  • 안종웅 (한국해양대학교 해양과학부) ;
  • 이범종 (인제대학교 화학과) ;
  • 문성기 (경성대학교 생물학과)
  • Published : 2004.02.01

Abstract

A peroxynitrite is formed when superoxide and nitric oxide exist at near eqimolar ratio in biological systems. Although not a free radical by chemical nature, peroxynitrite is a powerful oxidant having a wide array of tissue damaging effects ranging from lipid oxidation and inactivation of enzymes and ion channels through protein oxidation and nitration to inhibition of mitochondrial respiration. During our search for new antioxidizing components from natural resources, twenty salt marsh plants were screened for their ONOO and DPPH radical scavenging activities. Among them, methanol extract of Rosa rugosa, lxeris tamagawaensis, Erigeron annus, Tetragonia tetragonoides, Imperata cylindrica, and Suaeda japonica inhibited more than 85% of peroxynitrite produced by 3-morpholinsydnonimine (SIN-1) at a concentration of 5 $\mu\textrm{g}$/$m\ell$. In addition, Rosa rugosa, Artemisia capillaris, Erigeron annus and Ixeris tamagawaensis showed significant scavenging effect against DPPH (1,1-diphenyl-2-picrylhydrazyl radical).

본 연구에서는 항산화 활성을 갖는 유용한 선도 물질을 찾기 위한 일환으로 20종의 염생식물의 추출물에 대해 peroxynitrite와 DPPH 라디칼 소거 활성을 측정하였다. 그 결과 해당화 (Rosa rugosa), 개망초 (Erigeron annus), 냇씀바귀(Ixeris tamagawaensis), 띠 (Imperata cylindrica), 범행초(Tetragonia tetragonoides), 사철쑥 (Artemisia capillaris)의 MeOH 추출물에서 우수한 DPPH 라디칼 소거 효과가 확인되었다. 또한, 해당화(Rosa rugosa), 개망초 (Erigeron annus), 칠면초 (Suaeda japonica), 냇씀바귀 (Ixeris tamagawaensis), 띠 (Imperata cylindrica), 갯방풍 (Glehnia littoralis), 함초(Salicornia herbacea), 해국 (Aster spathulifolius), 범행초 (Tetragonia tetragonoides)의 MeOH 추출물과 CH$_2$Cl$_2$ 추출물에서 각각 peroxynitrite의 소거효과가 관찰되었다. 그 중에서도 해당화 MeOH 추출물의 DPPH 래디칼 소거효과는 100 $\mu\textrm{g}$/$m\ell$ (f.c.) 농도에서 87.51%로 나타났고, peroxynitrite 소거효과는 5 $\mu\textrm{g}$/$m\ell$ 농도에서 표품의 ONOO를 첨가했을 때 97.03%와 SIN-1을 첨가했을 때 98.48%로서 가장 강력한 항산화활성을 가지는 것으로 나타났다. 해당화의 peroxynitrite의 효과는 대조군으로 사용된 penicillamine보다도 우수하며, L-ascorbic acid와 비슷한 효과였다.

Keywords

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