Food Engineering Progress (산업식품공학)

Korean Society for Industrial Food Engineering (한국산업식품공학회)
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Antioxidant and Cytotoxic Activities of Hot Water and Ethanol Extracts From Caesalpinia sappan

소목의 열수 및 에탄올 추출물의 항산화 및 항암활성

  • Park, Mi-Hye (Department of Food Science and Nutrition, Kyungpook National University) ;
  • Kim, Bumsik (Department of Food & Nutrition, Yeonsung University)
  • 박미혜 (경북대학교 식품영양학과) ;
  • 김범식 (연성대학교 식품영양과)
  • Received : 2017.06.21
  • Accepted : 2017.08.06
  • Published : 2017.08.31
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Abstract

Caesalpinia sappan L. is an oriental medicinal plant distributed in the Asia Pacific region including India, Malaysia, and China. The dried heartwood of Caesalpinia sappan has been traditionally used as an analgesic and anti-inflammatory drug. In this study, the effects of extract methods of C. sappan on contents of total polyphenols and flavonoids, antioxidant activity, and cytotoxic activity were evaluated. As a result, hot water extract from C. sappan (CSWE) significantly exhibited contents of total polyphenols and flavonoids (22.6 mg GAE/g and 14.5 mg QE/g) higher than 70% ethanol extract (CSEE) (17.6 mg GAE/g and 13.2 mg QE/g). However, CSEE showed greater antioxidant activity than CSWE in both DPPH and ABTS. Also, the cytotoxicity of C. sappan against three kinds of cancer cell lines was higher in CSEE than in CSWE. These results show that ethanol extract is a better extract method than hot water method to maintain antioxidant and anti-cancer activities.

소목은 인도, 말레이시아, 중국 남부 등의 열대 아시아에 분포하는 낙엽 관목의 콩과 식물로써, 한방에서는 항통증, 항염증의 용도로 사용된다. 본 연구에서는 국내산 소목의 열수 및 에탄올 추출물의 총 폴레페놀, 총 플라보노이드의 함량 분석과 함께 항산화 및 항암활성 분석을 통해 기능성 소재로의 이용가능성을 살펴보고자 하였다. 소목 열수 추출물은 건소목 100 g에 증류수 2L를 가하여 $65^{\circ}C$의 수조에서 4시간 동안 추출하고 에탄올 추출물은 건소목 100 g에 70% 에탄올 2L를 가하여 $25^{\circ}C$, 108 rpm으로 24시간 동안 진탕 추출하였다. 추출물은 모두 여과, 농축한 후 동결 건조하여 시료로 사용되었다. 총 폴리페놀 함량은 열수 추출물 및 에탄올 추출물에서 각각 22.6 mg GAE/g과 17.6 mg GAE/g으로 나타났으며 총 플라보노이드 함량은 14.5 mg QE/g, 13.2 mg QE/g으로 에탄올 추출물에서 더 높은 함량을 보였다(p<0.05). DPPH 실험결과, 10-800 ug/mL의 농도에서 에탄올 추출물은 36.5-82.8%, 열수 추출물은 26.7-75.5%의 radical 소거능을 각각 나타내었다. DPPH실험과 동일한 농도에서 ABTS radical 소거능 측정 결과, 에탄올 추출물은 5.5-94.9%, 열수 추출물은 5.8-88.8%의 소거능을 각각 나타내었는데, 결과적으로 소목 에탄올 추출물이 열수 추출물에 비해 우수한 항산화력을 가지고 있음을 보여주었다(p<0.05). 소목의 항암 활성 측정을 위해 인체 암세포주인 A-549, HeLa, Hep3B cell에 대해 MTT assay와 SRB assay를 실시한 결과, 소목 에탄올 추출물의 농도가 증가함에 따라 각 세포주에 대한 세포 독성이 증가하는 경향을 보였다. MTT assay와 SRB assay의 모든 실험농도에서 폐암 세포인 A-549에 대해 가장 높은 세포 독성을 나타내었으며, 특히 MTT assay에서는 300 ug/mL의 소목 에탄올 추출물이 A-549 cell에 대해 90% 이상의 높은 암세포 억제효과를 보여주었다. 따라서, 우수한 항산화 활성과 항암 활성을 나타낸 소목 추출물은 향후 다양한 기능성 식품 및 의약 소재로서의 활용이 가능할 것으로 보인다.

Keywords

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