Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Changes in chemical stability and biological activities of sinapinic acid by heat treatment under different pH conditions

다양한 pH조건에서 가열처리에 의한 시나핀산의 화학 안정성 및 생리활성 변화

  • Heo, Yunseon (Division of Applied Food System, College of Natural Science, Seoul Women's University) ;
  • Hong, Jungil (Division of Applied Food System, College of Natural Science, Seoul Women's University)
  • 허윤선 (서울여자대학교 자연과학대학 식품응용시스템학부) ;
  • 홍정일 (서울여자대학교 자연과학대학 식품응용시스템학부)
  • Received : 2020.10.06
  • Accepted : 2020.12.01
  • Published : 2020.12.31
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Abstract

Sinapinic acid is a widely-distributed phenolic acid in various edible plants. In this study, changes in chemical stability and biological activities of sinapinic acid by heat treatment were evaluated at different pH values. The decomposition of sinapinic acid with heating at 95℃ was accelerated at higher pH; the residual levels after 10 min of heating were 80, 45 and 24% at pH 6, 7 and 8, respectively. Levels of reactive oxygen species derived from sinapinic acid also increased after heating at pH 7 and 8. ABTS radical scavenging activities and ferric reducing antioxidant power of sinapinic acid were reduced significantly after heating at pH 7 and 8. The cytotoxic activity of sinapinic acid against HCT116 cells was significantly enhanced after heating at pH 8 with decreased glutathione levels. The results suggest that heat treatment causes changes in the chemical stability and biological activities of sinapinic acid, and such changes are more prominent at higher pH.

본 연구에서는 다양한 pH 환경에서 식품의 가공 및 조리과정 중에 빈번히 적용되는 가열처리 과정을 적용하여 시나핀산의 화학 안정성, 산화방지활성 및 세포독성 등의 생리활성 변화를 조사하였다. 95℃에서 각 시간별로 가열처리한 시나핀산은 가열시간이 증가할수록 더 많이 분해되었으며 pH가 상승할수록 더 신속하게 분해되었다. 가열처리에 의해 시나핀산의 ABTS 라디칼소거능 및 FRAP 환원능이 모두 감소하였으며, 특히 pH 7과 8에서는 가열처리 시간에 유의적으로 현저하게 감소하였다. HCT116 인간 대장암세포에 대한 시나핀산의 세포독성 평가에서 가열처리 전의 시나핀산은 500 μM 농도까지 세포독성을 나타내지 않은 반면, pH 8에서 가열처리한 후에는 해당 농도에서 유의적인 세포독성을 발현하였으며 세포 내 glutathione 수치 또한 감소되었다. 본 연구결과는 시나핀산의 화학 안정성 및 생리활성이 가열처리와 pH 환경에 의해 많은 영향을 받으며, 시나핀산이 함유된 식품을 알칼리 조건에서 가열처리 시 성분의 손실 및 활성의 변화를 초래할 수 있음을 시사한다.

Keywords

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