The Korean Journal of Food And Nutrition (한국식품영양학회지)

The Korean Society of Food and Nutrition (한국식품영양학회)
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Anti-inflammatory Effect of Lactuca sativa L. Extract in Human Umbilical Vein Endothelial Cells and Improvement of Lipid Levels in Mice Fed a High-fat Diet

상추 추출물(Lactuca sativa L.)의 혈관내피세포에서 항염증 작용과 고지방 식이 생쥐에서 혈중 지질농도 개선에 미치는 영향

  • Hwang-Bo, Jeon (Dept. of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University) ;
  • Jang, Kyung Ok (Dept. of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University) ;
  • Chung, Hayoung (Cosmogen Co. Ltd.) ;
  • Park, Jong-Hwa (Dept. of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University) ;
  • Lee, Tae Hoon (Graduate School of East-West Medicinal Science Kyung Hee University) ;
  • Kim, Jiyoung (Cosmogen Co. Ltd.) ;
  • Chung, In Sik (Dept. of Genetic Engineering and Graduate School of Biotechnology, Kyung Hee University)
  • 황보전 (경희대학교 생명공학원 유전공학과) ;
  • 장경옥 (경희대학교 생명공학원 유전공학과) ;
  • 정하영 ((주)코스모젠) ;
  • 박종화 (경희대학교 생명공학원 유전공학과) ;
  • 이태훈 (경희대학교 동서의학대학원) ;
  • 김지영 ((주)코스모젠) ;
  • 정인식 (경희대학교 생명공학원 유전공학과)
  • Received : 2016.10.18
  • Accepted : 2016.12.13
  • Published : 2016.12.31
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Abstract

The objective of this study was to investigate the effects of a lettuce (Lactuca sativa L.) extract on the inflammation of human umbilical vein endothelial cell (HUVEC) and blood lipid improvement in hypercholesterolemic mice fed a high cholesterol diet. The lettuce extract (100% ethanol extract) inhibited the expression of intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 in HUVEC treated with tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$). The lettuce extract suppressed the adhesion of THP-1 to TNF-${\alpha}$-treated HUVEC. The lettuce extract decreased the TNF-${\alpha}$-stimulated production of proinflammatory cytokine interleukin-6, interleukin-8 and chemokine monocyte chemotactic protein 1. In hypercholesterolemic mice, the lettuce extract reduced serum total cholesterol, triglyceride, and low-density lipoprotein-cholesterol level, while the lettuce extract elevated high-density lipoprotein-cholesterol level, resulting in the decrease of atherogenic index and cardiac risk factor level. These results suggested that lettuce extract can be an useful resource to show an anti-inflammatory effect and improve lipid metabolism.

본 연구에서는 상추 추출물이 혈관내피세포의 염증반응에 미치는 영향 및 지질대사 개선 효과를 확인하기 위해 HUVEC을 이용한 in vitro 실험 및 고콜레스테롤혈증 모델을 이용한 동물실험을 수행하였다. 상추 추출물은 HUVEC에서 TNF-${\alpha}$에 의해 증가되는 세포접착단백질 ICAM-1, VCAM-1의 발현을 억제하였고 TNF-${\alpha}$에 의해 촉진되는 HUVEC와 단핵구 세포의 부착을 감소시켰다. 또한 상추 추출물은 TNF-${\alpha}$에 의해 증가되는 염증성 사이토카인 IL-6, IL-8 및 동맥경화 유발 케모카인 MCP-1의 생성을 농도 의존적으로 억제하였다. 고콜레스테롤혈증 동물모델에서 고콜레스테롤 식이군 및 상추 추출물이 첨가된 고콜레스테롤 식이군의 체중증가량 및 식이섭취량은 유의적인 차이를 보이지 않았다. 고콜레스테롤 식이군의 혈중 총 콜레스테롤 함량은 정상 식이군에 비해 크게 증가하였고 상추추출물이 첨가된 고콜레스테롤 식이군의 콜레스테롤 함량은 유의적으로 감소하였다. 고콜레스테롤 식이군의 혈중 중성지방 함량은 정상 식이군에 비해 약간 감소하였지만 유의적인 차이는 보이지 않았다. 상추 추출물이 첨가된 고콜레스테롤 식이군의 경우 혈중 중성지방 함량은 고콜레스테롤 식이군과 비교하였을 때 유의적인 차이를 보이지 않았다. 고콜레스테롤 식이군의 HDL-콜레스테롤 함량은 정상 식이군에 비해 감소하였고 상추 추출물이 첨가된 경우 HDL-콜레스테롤 함량은 고콜레스테롤 식이군에 비해 유의적으로 증가하였다. LDL-콜레스테롤 함량은 고콜레스테롤 식이군에서 크게 증가하였고 상추 추출물이 첨가된 경우 감소하였다. 혈청의 동맥경화지수 및 심혈관지수는 고콜레스테롤 식이군에서 정상 식이군에 비해 유의적으로 증가하였고 상추 추출물이 첨가된 고콜레스테롤 식이군에서 유의한 감소를 나타내었다. 이상의 연구결과는 상추 추출물이 혈관내피세포의 염증반응을 억제하여 혈관협착을 방지할 수 있고 혈중 지질대사의 개선 효과를 보여 혈액순환개선 및 동맥경화, 심혈관질환의 예방과 치료에 효과가 있다는 것을 의미한다.

Keywords

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