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Antioxidant Activity and in vitro for Anticancer Effects of Manufactured Fermented Mulberry Leaf Tea

뽕잎발효차 제조에 따른 항산화 및 in vitro 항암활성

  • Bae, Man-Jong (Dept. of Herbal Foodceutical Science, Daegu Haany University) ;
  • Ye, Eun-Ju (Efficacy and Safety Research Center for Traditional Oriental Medicine, Daegu Haany University, Kyungbuk Technopark)
  • 배만종 (대구한의대학교 한방식품약리학과) ;
  • 예은주 ((재)경북테크노파크 대구한의대학교 한방생명자원특화센터 효능검증원)
  • Received : 2009.11.30
  • Accepted : 2010.05.18
  • Published : 2010.06.30

Abstract

This study was conducted to compare and analyze the qualitative property of MLT (mulberry leaf tea) and FMLT (fermented mulberry leaf tea) based on the antioxidant, anticancer activities of various extracts. When the antioxidant activity of MLT and FMLT extracts was evaluated, the electron donating activity was found to increase proportionally as the concentration of each extract increased. In addition, the extract of FMLT showed a higher electron donating activity than that of MLT. Furthermore, the ethanol extracts showed the highest electron donating ability. When the SOD activity was evaluated, it was also found to increase proportionally with the concentration of each extract. Furthermore, the SOD activity of the ethanol extract group was the highest, whereas the SOD like activities of both MLT and FMLT were similar. When nitrite decomposition was evaluated for each pH, the highest value was observed at pH 1.2. Finally, the nitrite deleting ability was the highest for the ethanol extracts. When each extract of MLT and FMLT was analyzed in vitro for anticancer effects, they were found to decrease the number of cancer cells proportionally as the concentration of extract increased for both HeLa cells and MCF-7 cells. Furthermore, FMLT was found to exert a greater inhibition of cancer cells than MLT. Among the extract groups, the ethanol extract induced the greatest inhibition of the development of cancer cells, and these effects were greater against MCF-7 cells than HeLa cells.

본 연구는 식용식물로의 가치뿐만 아니라 약용으로 가치가 인정되는 뽕잎에 미생물 생균제를 이용한 뽕잎발효차 개발을 통하여 기능성 소재 개발 및 새로운 제품개발의 방안을 제시하고자 뽕잎차 및 뽕잎발효차의 여러 추출물의 항산화성 및 in vitro에서의 항암활성을 비교분석 하였다. 뽕잎차 및 뽕잎발효차의 각 추출물에 있어 항산화 효과를 조사한 결과 각 추출물의 농도와 비례하여 전자공여활성이 증가하였고 대체로 뽕잎발효차 추출물이 뽕잎차의 추출물보다 전자공여활성이 더 높은 것으로 나타났으며, 각 추출물의 종류 중 에탄올 추출물의 전자공여능이 가장 높은 것으로 분석되었다. SOD 유사활성도를 조사한 결과 각 추출물의 농도와 비례하여 SOD 유사활성도는 증가하는 경향이었고, 추출물중 에탄올 추출물군의 활성도가 가장 높았으며 두 시료의 SOD 유사활성도는 비슷하였다. 각 pH별 아질산염 분해 작용을 분석한 결과 pH 1.2에서 아질산염 분해 작용이 가장 컸으며, 추출물 군 중에서 에탄올 추출물 군이 아질산염 소거능이 가장 높았다. 뽕잎차 및 뽕잎발효차 각 추출물의 in vitro 상에서 항암효과를 분석한 결과 HeLa cell과 MCF-7 cell 모두 뽕잎발효차가 뽕잎차보다 암세포 증식 억제율이 더 높았다. 추출물 군에서는 에탄올 추출물군이 암세포 성장을 가장 많이 억제하였고 MCF-7 cell이 HeLa cell에서 보다 더 효과적인 것으로 나타났다. 따라서 본 연구의 결과를 종합해 보면 식용식물로서 뿐만 아니라 약용으로도 가치가 있는 뽕잎에 생균제를 이용하여 개발한 뽕잎발효차를 뽕잎차와 비교하였을 때 항산화성, in vitro에서의 항암활성을 검증한 결과 생균제를 이용한 뽕잎발효차가 뽕잎차보다 우수한 것으로 나타났으며 뽕잎발효차 추출물의 기능성이 더 우수한 것은 발효를 통해 생리활성 물질이 생성된 것이 원인으로 사료되며 이 점에 있어 구체적인 연구가 필요하다고 판단된다. 이러한 점을 보완하여 제품개발에 응용하고 대중적인 면을 좀 더 개선한다면 새로운 기능성소재 및 제품이 될 것 이라 사료된다.

Keywords

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