Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Component Analysis and Anti-Proliferative Effects of Ethanol Extracts of Fruits, Leaves, and Stems from Elaeagnus umbellata in HepG2 Cells

보리수나무 열매, 잎 및 줄기 에탄올 추출물의 함유성분 분석과 간암 세포 증식억제 효과

  • Kim, Min-Ju (Major in Food Science and Technology, Keimyung University) ;
  • Lim, Jong-Soon (Center for Traditional Microorganism Resources (TMR), Keimyung University) ;
  • Yang, Seun-Ah (Major in Food Science and Technology, Keimyung University)
  • 김민주 (계명대학교 식품가공학 전공) ;
  • 임종순 (계명대학교 전통미생물자원개발 및 산업화연구센터) ;
  • 양선아 (계명대학교 식품가공학 전공)
  • Received : 2016.03.03
  • Accepted : 2016.03.31
  • Published : 2016.06.30
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Abstract

The aim of this study was to evaluate the physicochemical properties and antioxidant and anti-proliferative activities of different plant parts of Elaeagnus umbellata Thunb. extracted with ethanol (EtOH). EtOH extract of stems presenting the highest content of polyphenols showed the strongest 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity ($EC_{50}=54.04{\mu}g/mL$). The total content of free amino acids decreased in the order of leaves (6,179.12 mg/100 g)> stems (1,211.69 mg/100 g)> fruits EtOH extract (378.88 mg/100 g), and asparagine (1,907.57 mg/100 g), ${\gamma}-aminobutyric$ acid (300.17 mg/100 g), and proline (233.48 mg/100 g) were the major free amino acid in leaves, stems, and fruits, respectively. Five phenolic compounds in each extract were measured by using liquid chromatography- tandem mass spectrometry, and gallic acid (98.95 mg/100 g) and (+)-catechin (1,575.99 mg/100 g) were present as major components in leaves and stems, respectively. EtOH extract of leaves showed the highest anti-proliferative activity against HepG2 cells as measured by 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyltetrazoliumbromide and lactate dehydrogenase assay but had no effects on Chang liver cells.

경남 합천 일대에서 재배된 보리수나무(Elaeagnus umbellata Thunb.)의 생리활성을 부위별(열매, 잎, 줄기)로 평가한 결과는 다음과 같다. 항산화 특성을 측정한 결과, 총폴리페놀 함량이 높게 나타난 줄기(829.6 mg/g) 에탄올 추출물에서 DPPH 라디칼 소거능($EC_{50}=54.04{\mu}g/mL$)이 가장 우수하였다. 유리 아미노산 분석에서는 잎(6,179.12 mg/100 g) 에탄올 추출물이 열매(378.88 mg/100 g)와 줄기(1,211.69 mg/100 g) 에탄올 추출물보다 유리 아미노산 함량이 높았으며, 열매의 proline, 잎의 asparagine 및 줄기의 GABA가 대표적인 유리 아미노산인 것을 확인하였다. LC-MS/MS를 이용한 주요 페놀 성분 분석에서는 잎 에탄올 추출물에서 gallic acid, 줄기 에탄올 추출물에서 catechin의 함량이 가장 높았으며, HepG2 cell과 Chang cell의 암세포 증식억제 효과를 측정한 결과 잎 에탄올 추출물이 HepG2에 특이적으로 높은 억제 활성이 나타났다. 향후 보리수나무를 국내 우수 자원으로 활용하기 위해서는 추가로 다양한 암세포에 대한 활성 차이, 부위별 활성 물질의 구명 및 작용 기전 등에 대한 계속된 연구가 수행되어야 할 것이다.

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