Abstract
고콜레스테롤혈증 흰쥐에 있어서, 붉은 대게(Chinonecetes japonicus) 껍질에서 추출 제조된 키토산 올리고당의 급여가 혈청 지질개선효과 및 지질대사 이상 등에 관여하는 지질성분 및 효소의 활성 변동을 검토하기 위하여 SD계 흰쥐 수컷을 사용하여 본 실험을 행하였다. 기본식이만을 급여한 대조군인 BW군을 비롯한 고콜레스테롤혈증 유발군(CW군), 고콜레스테롤혈증 유발에 키토산 올리고당을 섭취시킨 군(CCW군)을 5주간 실험 사육하였다. 혈청 총 콜레스테롤, 동맥경화지수, LDL, LDL-콜레스테롤, 유리 콜레스테롤, 콜레스테롤 에스테르 비, 중성지방 및 인지질 농도 및 혈당 농도 등은 키토산 올리고당을 섭취시킨 군(CCW군)에서 농도가 감소되는 것으로 나타났다. 또한, HDL-콜레스테롤 및 총 콜레스테롤에 대한 HDL-콜레스테롤 비 등은 키토산 올리고당 급여(CCW군)에 의해서 증가되는 것으로 나타났다. 혈청 중 alkaline phosphatase (ALP) 및 aminotransferase (AST, ALT)의 활성은 고콜레스테롤혈증을 유발 시킨 후 키토산 올리고당을 급여시킴으로써 감소되는 것으로 나타났다. 이상과 같은 결과들을 미루어 볼 때, 키토산 올리고당이 고콜레스테롤혈증 유발 흰쥐의 지질성분 조절 및 혈청 지질대사 이상 등에서 오는 고콜레스테롤혈증의 예방 및 개선에 효과가 있을 것으로 사료된다. This study was performed to investigate the effects of the chitosan oligosaccharide administration on the improvement of the lipid compositions, blood glucose and enzyme activities in the serum of hypercholesterolemic rats fed the experimental diets for 5 weeks. Concentrations of total cholesterol, atherosclerotic index, LDL, LDL-cholesterol, free cholesterol, cholesteryl ester ratio, triglyceride (TG), phospholipid (PL) and blood glucose in serum were higher in the hypercholesterolemic group (group CW) and cholesterol+chitosan oligosaccharide administration group (group CCW) than those in the control group (group BW, basal diet+water). But the concentrations of total cholesterol, atherosclerotic index, LDL, LDL-cholesterol, free cholesterol, cholesteryl ester ratio, TG, PL and blood glucose in serum were lower in the group CCW than those in the CW, whereas the ratio of HDL-cholesterol concentration to total cholesterol and HDL-cholesterol concentration in the group CCW were higher than in the group CW. The activities of alkaline phosphatase (ALP) and aminotransferase (AST, ALT) in serum were lower in the group CCW than in the hypercholesterolemic group CW. From the above results, it was suggested that chitosan oligosaccharide administration was effective in the prevention and improvement of the lipid level, blood glucose and enzyme activities in serum of hypercholesterolemic rats.
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