Effect of Sea Tangle and Metformin on Lipid Peroxide and Antioxidants Levels in Diabetic Rats

당뇨쥐에서 다시마와 Metformin의 급여가 지질과산화물과 항산화영양소 함량에 미치는 영향

  • Published : 1999.04.01

Abstract

The present study was conducted to investigate te effect of sea tangle and hypoglycemic agent(Metformin) on lipid peroxidation and antioxidants levels in normal and diabetic rats. Male Sprague-Dawley rats were fed AIN-76 based experimental diets containing 5% (w/w) cellulose or 15%(w/w) sea tangle for 3 weeks, and then rats of diabetic groups were rendered diabetic by intramuscular injection of streptozotocin(STZ, 45mg/kg BW). After induction of diabetes Metformin(350mg/kg BW) was given once a day using a feeding tube for 5 days. Blood glucose level in diabetic rats fed sea tangle was significantly lower than that of diabetic rats fed cellulose. Metformin feeding resulted in further lowering blood glucose. Plasma and liver microsomal levels of lipid peroxides were increased significantly in diabetic rats as compared to normal rats, and the plasma level tended to be decreased by sea tangle feeding. Plasma level of retinol was reduced by STZ treatment, but it was increased by Metformin feeding in diabetic rats fed sea tangle. The liver contents of retinyl plamitate were reduced in diabetic rats but recovered by sea tangle feeding to some extent. Liver contents of total vitamin A were increased significantly by sea tangle in diabetic rats. Although difference in either plasma or liver level of $\alpha$-tocopherol by diet and STZ treatment was not significant, $\alpha$-tocopherol levels were the highest in the group with simultaneous feeding of sea tangle and metformin. Liver contents of zinc and copper were not influenced by either STZ treatment or sea tangle feeding. The present study indicates that the lowering blood glucose level could be attained by simultaneous trial of sea tangle diet and hypoglycemic agent and the increased oxidative stress caused by STZz treatment could be relieved by sea tangle feeding.

Keywords

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