The Korean Journal of Food And Nutrition (한국식품영양학회지)

The Korean Society of Food and Nutrition (한국식품영양학회)
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Improvements Caused by Silk Sericin Extract Derived from Silkworm in Blood Glucose and Lipid Concentration in Diabetic Rats

누에 유래 실크 세리신이 당뇨성 흰쥐의 혈당 및 지질 농도 개선에 미치는 영향

  • Kim, Han-Soo (Dept. of Food Science & Technology, Pusan National University) ;
  • Seong, Jong-Hwan (Dept. of Food Science & Technology, Pusan National University) ;
  • Lee, Young-Guen (Dept. of Food Science & Technology, Pusan National University) ;
  • Xie, Cheng-Liang (Dept. of Food Science & Technology, Pusan National University) ;
  • Shin, Ji-Moon (Dept. of Food Science & Technology, Pusan National University) ;
  • Yoon, Ho-Dong (Food & Safety Research Division, National Fisheries Research & Development Institute)
  • Received : 2010.07.22
  • Accepted : 2010.08.12
  • Published : 2010.09.30
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Abstract

The objective of this study was to assess improvements caused by silk sericin extract in blood glucose and lipid concentrations in the sera of streptozotocin(STZ, 55 mg/kg B.W., I.P. injection)-induced diabetic rats fed on experimental diets for 5 weeks. Serum concentrations of blood glucose, total cholesterol, atherosclerotic index, LDL, LDL-cholesterol, free cholesterol, cholesteryl ester ratio, triglyceride(TG) and phospholipids(PL) were remarkably higher in the diabetic group(group BSW) and STZ(I.P.)-plus-silk sericin extract group(group ESS) than in the control group(group CG, basal diet-plus-water). However, the serum concentrations of blood glucose, total cholesterol, atherosclerotic index, LDL, LDL-cholesterol, free cholesterol, cholesteryl ester ratio, TG and PL were lower in the ESS group than in the BSW group, whereas the ratio of HDL-cholesterol concentration to total cholesterol and HDL-cholesterol concentration in the ESS group were higher than in the BSW group. The activities of alkaline phosphatase(ALP) and aminotransferase(AST, ALT) in serum were lower in the ESS group than in the diabetic BSW group. The results shown above suggested that silk sericin extract effectively improves blood glucose and lipid concentrations in the sera of STZ-induced diabetic rats.

누에로부터 추출한 실크 세리신 추출물이 streptozotocin(STZ 55 mg/kg B.W., I.P. injection)으로 유도된 당뇨성 Sprague Dawley계 수컷 흰쥐에 있어서, 혈당 및 혈청 지질 농도 개선 효과와 당질대사 이상 등에 관여하는 효소의 활성 변동을 생리생화학적 측면에서 검토하기 위하여 본 실험을 수행하였다. 대조군인 CG군을 비롯한 STZ 당뇨 유발군(BSW군), 당뇨 유발에 실크 세리신을 급여시킨 군(ESS군)을 5주간 실험 사육한 결과, 혈당 농도는 당뇨 유발군에 실크 세리신을 섭취함으로써 유의적인 감소 효과를 보였다. 또한, 혈청 총 콜레스테롤, 동맥경화지수, LDL, LDL-콜레스테롤, 중성지방 및 인지질 농도, 유리 콜레스테롤, 콜레스테롤 에스테르 비 등은 실크 세리신을 섭취시킨 군(ESS군)에서 농도가 저하되는 것으로 나타났다. 한편, HDL-콜레스테롤 및 총 콜레스테롤에 대한 HDL-콜레스테롤 비 등은 실크 세리신 섭취에 의해서 증가되는 것으로 나타났다. 혈청 중 alkaline phosphatase(ALP) 및 aminotransferase(AST, ALT)의 활성은 당뇨를 유도시킨 후 실크 세리신을 섭취시킴으로써 저하되는 것으로 나타났다. 따라서 본 실험 결과, 실크 세리신 추출물이 STZ으로 유발된 당뇨성 흰쥐의 혈당 조절 기능 및 지질대사 이상 등에서 오는 당뇨성 질환의 예방 및 개선에 효과가 있을 것으로 추정된다.

Keywords

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