Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
권호 표지

Effects of Vitamin E on the Oxidative Damage and Glomerular Filteration Rates of Kidney in Streptozotocin-Inducd Diabetic Rats

당뇨쥐 신장조직의 산화적 손상과 사구체 여과율에 미치는 비타민 E의 영향

  • 곽오계 (대구과학대학교 간호학과)
  • Published : 2000.09.01
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Abstract

The purpose of this study was to investigate the effects of vitamin E on the oxidative damage and glomerular filteration rates(GFR) of kidney in streptozotocin(STZ) induced diabetic rats. Sprague-Dawley male rats weihing 100$\pm$10gm were randomly assigned to one normal and three STZ-induced diabetic groups which were subdivided into vitamin E free diet(DM-0E group)40mg vitamin E per kg diet(DM-40E group) and 400mg vitamin E per kg diet (DM-400E group), Vitamin E level of normal group was 40mg per kg diet. diabetes was experimentally induced by intravenous injection of 55mg/kg of body weight of STZ in citrate buffer(pH 4.3) after 4 weeks feeding of experimental diets. Animals were sacrificed at the 6th day of diabetic states. Activities of xanthine oxidase(XOD) in DM-0E DM-40 and DM-400E groups were significantly increased by 133%, 110%, and 74% respectively compared to normal group. The contents of microsomal superoxide radical(O2) in kidney were 106% and 119% higher of DM-0E and DM-40E groups than normal group respectively but that of DM-400E group was similar to normal group. The level of urnary microalbumin in DM-0E group was increased as 5 times much as normal group at the 6th day. Those of DM-40E and DM-400E groups were decreased to 16% and 36% respectively compared to DM-0E group. The content of urinary $\beta$2-microglobulin in DM-0E DM-40E and DM-400E group were increased by 268%, 181% and 163% respectively compared to normal group. GFR in DM-0E and DM-40E were significantly increased but was nor significantly different from DM-400E groups compared to normal group. In conclusion the supplementation of dietary vitamin E reduced peroxidative damage of renal glomerular and renal dysfunction in diabetic rats.

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