Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
권호 표지

Antioxidant Effects and Improvement of Lipid Metabolism of Mulberry fruit, Mulberry Leaves and Silkworm Powder with Different Mixing Ratios in Streptozotocin-Induced Diabetic Rats

오디, 뽕잎 및 누에의 혼합비율에 따른 Streptozotocin 유발 당뇨쥐에서의 항산화 효과 및 지질대사개선 효과

  • Kwon Eun-Hye (Department of Food Science and Nutrition, Catholic University of Daegu) ;
  • Jung Myung-Ae (Department of Food Science and Nutrition, Catholic University of Daegu) ;
  • Rhee Soon-Jae (Department of Food Science and Nutrition, Catholic University of Daegu) ;
  • Choi Sang-Won (Department of Food Science and Nutrition, Catholic University of Daegu) ;
  • Cho Sung-Hee (Department of Food Science and Nutrition, Catholic University of Daegu)
  • 권은혜 (대구가톨릭대학교 식품영양학과) ;
  • 정명애 (대구가톨릭대학교 식품영양학과) ;
  • 이순재 (대구가톨릭대학교 식품영양학과) ;
  • 최상원 (대구가톨릭대학교 식품영양학과) ;
  • 조성희 (대구가톨릭대학교 식품영양학과)
  • Published : 2006.03.01
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Abstract

This study was conducted to investigate the effects of mulberry fruit, mulberry leaves and silkworm powder with different mixing ratios on hepatic antioxidative system and lipid metabolism in streptozotocin-induced diabetic rats. Sprague-Dawley male rats weighing $100{\pm}10g$ were induced diabetic by 50 mg/kg bw streptozotocin and randomly assigned to following experimental groups; normal diet group (DM), 0.3% and 0.6% mulberry fruit diet groups (F and 2F), 0.3% mulberry leaves diet group (M), 0.3% silkworm powder diet group (S), 0.15% mulberry fruit+0.15% mulberry leaves diet group (FM), 0.15% mulberry fruit+0.15% silkworm powder diet group (FS), 0.1 % mulberry fruit+0.1 % mulberry leaves+0.1% silkworm powder diet group (FMS). The experimental diets were fed for 4 weeks. Hepatic SOD activity was not changed significantly by any of single or combined supplementations of mulberry fruit, leaves and silkworm powder but GSH-px and catalase activities were increased by the groups supplemented with two or three of the test ingredients (FM, FS, FMS) as compared with the DM group. Hepatic TBARS value was not reduced significantly by any of the supplementations but lipofuscin contents were significantly reduced in the FM, FS and FMS groups as compared with the DM group. Hepatic mitochondria and microsomal carbonyl values were reduced by the single and combined supplementations of the test ingredients. Hepatic HMG-CoA reductase activities were increased in the all supplementation groups as compared with the DM group. Hepatic total lipid and triglyceride contents were increased but cholesterol contents reduced in the supplemented groups. The effects on the enzyme activities, peroxide or its products and lipid contents were most remarkable in the FMS group. In conclusion, mulberry fruit, mulberry leaves and silkworm powder have the favorable effects on antioxidative system and lipid metabolism in the diabetic liver and the mulberry fruit, leaves and silkworm powder with equal ratio exert the synergistic effect expectedly to prevent diabetic complications.

Keywords

References

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