Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Changes in chemical properties and cytotoxicity of turmeric pigments by microwave treatment

마이크로파처리에 의한 심황색소의 화학안정성 및 세포독성 변화

  • Song, EiSeul (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)
  • 송이슬 (서울여자대학교 자연과학대학 식품응용시스템학부) ;
  • 홍정일 (서울여자대학교 자연과학대학 식품응용시스템학부)
  • Received : 2017.07.24
  • Accepted : 2017.09.20
  • Published : 2017.12.31
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Abstract

Turmeric is a yellow food-coloring spice containing curcuminoids, curcumin, demethoxycurcumin (DMC), and bisdemethoxycurcumin (BMC), which have several physiological effects. In the present study, the effect of microwave irradiation on the chemical properties, antioxidant activity, and cytotoxicity of turmeric were investigated. Degradation of turmeric pigments was accelerated upon increase in irradiation time or intensity at 405 nm. Residual levels of curcumin, DMC, and BMC after 5 minutes of irradiation at 700 W were 11.3, 34.4, and 71.2%, respectively. Scavenging activities of turmeric pigment against 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2,2-azobis (2-amidinopropane) dihydrochloride (AAPH) peroxyl radical and nitrite were enhanced significantly after microwave radiation. However, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity remained unaffected. Cytotoxic activity of turmeric was significantly reduced, and hydrogen peroxide generated from turmeric increased after microwave irradiation. The results obtained indicate that microwave irradiation affects chemical stability and bioactivity of turmeric pigment. Hence, these effects should be considered when processing foods containing turmeric pigments.

다양한 생리활성을 가진 심황과 쿠쿠미노이드가 가공식품류 등에 광범위하게 적용되는 바, 실제 식품 중에 이용되는 oleoresin turmeric 색소에 대해 마이크로파처리에 의한 화학안정성 및 생리활성의 변화를 분석하였다. 심황색소는 마이크로파 가열처리에 의해 황색도와 화학안정성이 감소하였으며 특히 3종의 쿠쿠미노이드 중 쿠쿠민이 마이크로파처리에 가장 민감하였고 BMC가 가장 안정하였다. 마이크로파처리 후 심황색소의 ABTS, AAPH peroxyl radical 및 아질산염 제거활성은 증가하였으며, DPPH 라디칼 제거활성에는 변화가 없었다. 심황색소에서 생성되는 활성 산소종은 마이크로파처리 후 증가하였으나, 정상장관계 세포 INT 407과 대장암 세포 HCT 116을 대상으로 한 세포독성 효과는 두 종류의 세포에서 모두 약화되었다. 본 연구에서는 다양한 식품 중에 첨가되는 심황색소가 마이크로파처리에 의해 화학적변화 및 생리활성에 영향을 가져올 수 있음을 보여주며, 이를 함유한 식품의 적절한 가공 및 조리방법이 고려되야 함을 제시하고 있다.

Keywords

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