Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Components and Biological Activity of Aqueous Extract Isolated from Winged Stem of Euonymus alatus

화살나무 물 추출물의 구성성분과 생리활성

  • Oh, Bong-Yun (Glycomics Team, Korea Basic Science Institute) ;
  • Hwang, Soo-Kyung (Glycomics Team, Korea Basic Science Institute) ;
  • Cheong, Mi-Young (Glycomics Team, Korea Basic Science Institute) ;
  • Sin, Hong-Sig (Chebigen, Inc., Jeollabuk-do Center for Biotechnology & Bioventure) ;
  • Park, Bock-Hee (Department of Food and Nutrition, Mokpo National University) ;
  • Lee, Jeong-Ho (Department of Microbiology & Immunology Chonbuk National University Medical School) ;
  • Kim, Soo-Hyun (Glycomics Team, Korea Basic Science Institute)
  • 오봉윤 (한국기초과학지원연구원 글라이코믹스팀) ;
  • 황수경 (한국기초과학지원연구원 글라이코믹스팀) ;
  • 정미영 (한국기초과학지원연구원 글라이코믹스팀) ;
  • 신홍식 (케비젠(주)) ;
  • 박복희 (목포대학교 식품영양학과) ;
  • 이정호 (전북대학교 의과대학 미생물 및 면역학과) ;
  • 김수현 (한국기초과학지원연구원 글라이코믹스팀)
  • Published : 2005.12.31
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Abstract

Although Euonymus alatus (EA) has been used as traditional medicine for cancer treatment, exact substances involved in curing of the disease are not yet known. Free radical scavenging and reactive oxygen species (ROS) removal activities of aqueous extract components isolated from winged stem of EA in animal cell line were investigated. Aqueous extract of EA (AEEA) was fractionated by ultrafiltration. All fractions mainly consisted of polysaccharide (44.8%), protein (2.1%), small amounts of phenol compounds and organic acids. Antioxidant activity of AEEA increased depending on concentration fractions, as determined by 1,1-diphenyl-2-picrylhydrazyl method. ROS removal activity was visualized in Chinese hamster ovary cell line using laser scanning confocal microscope, and AEEA activity increased in order of F IV>F III>F I>F II. These results suggest AETA has bioactive carbohydrates with potentials as functional foods and antioxidants.

본 연구는 화살나무의 줄기와 날개를 열수 추출하여 분자량 크기별로 네 분획(F I. F II, F III, F IV)으로 분리하여 각 분획물의 성분조성을 분석하였고, 이들 각 분획물의 생리활성을 알아보기 위해 DPPH를 이용한 유리 라디칼 소거능과 동물 세포에서 활성산소종 제거능에 대하여 조사하였다. 열수 추출물의 정성반응 결과, 네 분획물 모두 대부분 탄수화물이었고, 소량의 단백질을 함유하였으며, 일부 분획물에는 소량의 페놀 화합물 및 유기산이 함유되어 있었다. 주요 구성 성분인 총당과 총단백질 함량은 448mg/g과 21mg/g이었으며, 총 당의 함량은 F III가 가장 높았고, F IV, F II 및 F I의 순서였다. 네 분획물을 가수분해하여 이들의 구성당을 분석한 결과, 중성당은 mannose : fucose : galactose : glucose가 0.01 : 0.02 : 0.14 : 0.83의 비율로, 아미노당은 galactosamine : glucosamine이 0.01 : 0.99의 비율로 구성되어 있었으며, 전체 구성당 함량에서 중성당 : 아미노당의 비율은 0.94 : 0.04로 조성된 다당체였다. 분획물별로 총단백질과 구성 아미노산은 F IV가 가장 높았으며, F III, F II 및 F I의 순서로 함유하였다. 조 추출물에 함유된 아미노산의 종류와 양은 Glu>Asp>Pro>Gly>Leu>Val>Ser>Ala>Thr>Ile>Phe>Cys>His>Arg>Met>Lys>Try>Trp>Cys2의 순서로 19종의 아미노산이 분석되었으며, 특히 산성 아미노산과 중성 아미노산 함량이 높았다. 네 분획물을 각 농도별로 처리하여 DPPH 유리 라디칼 소거능을 조사한 결과는 $50-1,000{\mu}g/mL$ 처리했을 때 농도에 비례하여 네 분획물 모두에서 F IV, F III, F II 및 F I의 순서로 활성을 나타냈다. CHO-k1 동물 세포에서 활성산소종 제거능을 조사한 결과는, 분획물을 $1-100{\mu}g/mL$까지 처리한 농도에 비례하여 활성이 상승되는 것으로 나타났으나 $100{\mu}/mL$ 이상의 처리농도에서는 거의 변화를 보이지 않았다. 각 분획물별로 F IV이 가장 높은 활성을 보였으며, 그 다음 F III, F I이었으며, F II은 가장 낮은 활성을 나타냈다. 화살나무 열수 추출물 중에는 항산화능과 활성산소종 제거능을 나타내는 물질이 여러 가지 있을 것으로 추정되지만 분자량 크기별로 분획한 네 분획물의 정색반응과 성분조성을 조사한 결과, 주요 구성성분은 단백질이 결합되어 있을 가능성이 높으며, DPPH 유리 라디칼 소거능과 CHO-k1의 세포에서 활성산소종 제거능의 생리활성을 나타내는 다당체(bioactive carbohydrate)일 것으로 사료된다.

Keywords

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