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NTIS 바로가기한국식품과학회지 = Korean journal of food science and technology, v.48 no.6, 2016년, pp.610 - 617
김석중 (동덕여자대학교 식품영양학과)
Melatonin, known as a powerful wide-spectrum antioxidant, is consumed as a food supplement in some countries, but its applicability as an antioxidant additive was not yet studied. Therefore, we evaluated the antioxidant activity of melatonin by DPPH, ABTS, FRAP and ORAC assays as well as its ability...
핵심어 | 질문 | 논문에서 추출한 답변 |
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체내 산화적 스트레스를 줄일 수 있는 산화방지제는 어떤 것이 있는가? | 정상적인 생체조건에서는 과도한 ROS가 효소적 산화방지제(초과산화물제거효소, 카탈레이스, 글루타싸이온 환원효소, 과산화효소 등)와 비효소적 산화방지제(글루타싸이온, 리포산, L-아르기닌, 조효소 Q10, 멜라토닌 등)에 의해 억제되지만(4) 체내 산화방지제의 부족이나 ROS를 증가시키는 외부요소(담배연기, 알코올, 자외선, 오존 등)에 노출 되면 ROS가 증가하는 산화적 스트레스 상태가 된다(5). 그러나 외부로부터 비타민 E와 C, 베타카로틴, 페놀화합물, 셀레니움 같은 다양한 산화방지제를 섭취하면 체내의 산화적 스트레스를 줄일 수 있으며(2), 산화방지 물질이 풍부한 과일이나 채소 등의 식품을 섭취하면 ROS와 관련된 심혈관 질환, 고혈압, 암, 당뇨, 염증 등을 줄일 수 있음이 보고되어 있다(2,6). | |
멜라토닌 합성경로에 관련된 인돌 화합물 중 세로토닌은 동물, 식물에서 어떻게 합성하는가? | 1에 나타낸 바와 같이 동물, 식물 모두에서 아미노산인 트립토판에서 합성이 되며 세로토닌 이후의 과정은 동일하다. 하지만 세로토닌 합성까지는 차이가 있는데, 동물에서는 트립토판의 수산화가 먼저 일어나 5-하이드록시 트립토판이 생성 된 후 탈탄산화에 의해 세로토닌으로 전환되는 반면 식물에서는 먼저 탈탄산화가 일어난 후 트립타민으로 전환된 다음 수산화를 통해 세로토닌이 생성된다(21,26). 본 실험에서는 멜라토닌 및 동·식물에서의 공통적인 인돌 화합물인 트립토판, 세로토닌, N아세틸 세로토닌, 그리고 식물에서 나타나는 트립타민의 산화방지능을 비교하였다. | |
활성산소 중 비라디칼 산화제는 어떤 종류가 있는가? | 활성산소(reactive oxygen species, ROS)는 산화작용이 강한 산소종으로, 라디칼(수퍼옥사이드: O2·−, 하이드록시: HO·, 퍼록시: ROO·, 하이드로퍼록시: HOO·)과 쉽게 라디칼로 바뀔 수 있는 비라디칼 산화제(과산화수소: H2O2, 하이포염소산: HClO, 오존: O3) |
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