Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
권호 표지

Antioxidative and Anticancer Activities of Various Solvent Fractions from the Leaf of Camellia japonica L.

동백나무 잎 용매분획물의 항산화 및 항암 활성

  • Kim, Jin-Hee (Division of Applied Life Sciences, Graduate School, and Institute of Agricultural & Life Science, Gyeongsang National University) ;
  • Jeong, Chang-Ho (Division of Applied Life Sciences, Graduate School, and Institute of Agricultural & Life Science, Gyeongsang National University) ;
  • Shim, Ki-Hwan (Division of Applied Life Sciences, Graduate School, and Institute of Agricultural & Life Science, Gyeongsang National University)
  • 김진희 (경상대학교 대학원 응용생명과학부 및 농업생명과학연구원) ;
  • 정창호 (경상대학교 대학원 응용생명과학부 및 농업생명과학연구원) ;
  • 심기환 (경상대학교 대학원 응용생명과학부 및 농업생명과학연구원)
  • Received : 2009.12.15
  • Accepted : 2010.04.02
  • Published : 2010.04.30
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Abstract

To obtain basic information on the potential use of Camellia japonica leaf as a raw material in functional food, leaf antioxidant and anticancer activities were investigated. The radical-scavenging activity of various solvent fractions from the leaf, as shown by the DPPH radical test, increased in a dose-dependent manner, with the water fraction showing the highest activity. The reducing power of various solvent fractions from the leaf was also dose-dependent, and, again, the water fraction showed the highest reducing power. The water fraction showed strong antioxidant activity in the linoleic acid test and was also capable of scavenging nitrite in a dose-dependent manner. Proportions of 92.15% and 95.61% of available nitrite were scavenged by the water and butanol fractions, respectively, at levels of $1,000{\mu}g/mL$. Both butanol and water fractions exhibited strong inhibitory effects on the growth of human lung and colon cancer cells. The total phenolic contents of the butanol and water fractions were 216.26 mg/g and 220.68 mg/g, respectively. High-performance liquid chromatography (HPLC) showed that quercetin and epicatechin were the predominant phenolic compounds in the water fraction. The activities of this fraction are attributable to the presence of these phenolic compounds, particularly quercetin and epicatechin.

동백나무 잎을 새로운 기능성 식품의 재료로 활용하기 위하여 항산화 및 항암활성을 측정한 결과는 다음과 같다. DPPH radical 소거활성을 측정한 결과 분획물의 농도가 증가함에 따라 DPPH radical 소거활성이 증가하는 경향을 보였으며, 특히 물 분획물에서 가장 높은 DPPH radical 소거활성을 보였다. 환원력도 분획물의 농도가 증가함에 따라 환원력이 증가하는 경향을 보였으며, 환원력 또한 물 분획물에서 가장 높게 나타났다. Linoleic acid를 이용한 자동산화 억제활성을 실험한 결과 다른 분획물에 비하여 물 분획물에서 가장 높은 과산화 억제활성을 나타내었고, 분획물의 농도가 증가함에 따라 아질산염 소거활성 역시 증가하는 경향을 보였으며, 특히 부탄올 및 물 분획물을 $1,000{\mu}g/mL$의 농도로 첨가하였을 때 각각 92.15%와 95.61%의 높은 아질산염 소거활성을 보였다. 폐암세포와 결장암세포에 대한 생육억제활성을 측정한 결과 부탄올 및 물 분획물에서 가장 높은 생육억제활성을 보였다. 총 페놀릭 화합물은 부탄올 및 물 분획물에서 각각 216.26 및 220.68 mg/g으로 나타났으며, HPLC로 물 분획물의 페놀릭 화합물을 분석한 결과 quercetin과 epicatechin이 가장 많이 함유되어 있었고, 동백나무 잎의 항산화 및 항암활성은 quercetin과 epicatechin과 같은 폴리페놀 화합물에 의한 것으로 추측된다.

Keywords

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