Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Chitosan Oligosaccharides on Cholesterol Level and Antioxidant Enzyme Activities in Hypercholesterolemic Rat

고콜레스테롤 식이에 있어 키토산 올리고당이 체내 콜레스테롤농도 및 항산화효소 활성에 미치는 영향

  • 김길남 (제주대학교 해양생물공학과) ;
  • 주은숙 (제주대학교 동물자원학과) ;
  • 김규일 (제주대학교 동물자원학과) ;
  • 김세권 (부경대학교 화학과) ;
  • 양현필 ((주)키토라이프 기술연구소) ;
  • 전유진 (제주대학교 해양생물공학과)
  • Published : 2005.01.01
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Abstract

Effect of chitosan oligo saccharides (COS) on the level of serum lipids, antioxidant enzyme activities and lipid peroxidation was investigated in rats fed with high cholesterol diet for 4 weeks, The rats were divided into three experimental groups that is, high cholesterol diet group (0.5% cholesterol; control). high cholesterol diet and 1.0% or 2.0% COS-supplemented groups (COS I , COS II). Serum total cholesterol, LDL-cholesterol and triglyceride level were significantly decreased and relative HDL-cholesterol level in total cholesterol significantly increased in COS II group. Liver TBARS level and activities of SOD and catalase of COS I were also significantly reduced. These results suggest that supplement of chitosan oligosaccharides reduce levels of serum cholesterol and reduce oxidative damage by activating hepatic antioxidative defense system in rats fed with high cholesterol diets.

본 연구는 고콜레스테롤을 급여한 흰쥐 에 키토산 올리고당의 첨가 수준을 달리한 식이가 흰쥐의 지방대사에 미치는 영향을 알아보고자 수행하였다. 체중이 174.7$\pm$6.3 g인 Sprague-Dawley종 수컷 흰쥐에게 고콜레스테롤혈증을 유발시키기 위하여 콜레스테롤을 식 이 무게의 0.5%를 급여하고 키토산 올리고당을 식이 무게의 1.0%와 2.0%로 하여 총 3군으로 나누어 4주간 사육하였다. 식이섭취량과 체중증가량은 식이에 의한 영향이 없었다. 혈청 중 총 콜레스테롤, 중성지방은 대조군에 비해 2.0% 키 토산 올리고당을 첨가한 군에서 유의적으로 그 농도가 크게 감소하였으며 HDL-콜레스테롤/총콜레스테롤 비는 키토산 올리고당 첨가에 의해 높아지는 경향을 보였다. 간 조직 중 TBARS 함량은 키토산 올리고당을 첨가하였을 경우 유의적으로 낮게 나타났으며 SOD와 catalase의 활성은 키토산 올리고당을 첨가한 군이 대조군에 비해 유의적으로 낮았다. 이상의 결과를 볼 때 키토산 올리고당은 체내 지방대사에 있어 총콜레스테롤과 LDL-콜레스테롤, 중성지방 및 TBARS 함량을 낮추고 HDL-콜레스테롤/총 콜레스테롤 비는 높이는 효과를 나타냈으며, 또한 생체내 고콜레스테롤에 의한 산화적 스트레스로부터 간을 보호하는 것을 알 수 있었다.

Keywords

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