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Dietary fibres ameliorate decreased synthesis of heparan sulphate in streptozotocin induced diabetic rats

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Title Dietary fibres ameliorate decreased synthesis of heparan sulphate in streptozotocin induced diabetic rats
 
Creator Nandini, Chilkunda D.
Sambaiah, Kari
Salimath, P. V.
 
Subject 01 Dietary Fiber
04 Diabetes Mellitus
 
Description The role of dietary fibers in diabetes has been studied by several workers [1,2]. Long term dietary treatment with increased amounts of fiber-rich low-glycaemic index natural foods improves blood glucose and reduces the number of hypoglycemic events in type I diabetic patients [3,4]. On the other hand Rohrbach and Martin [5] and Cohen and Surma [6] described changes in the general and
biochemical structure of renal tissues such as the glomerular basement membranes. One of these changes was the reduction and undersulfation of the glycoconjugate and glycosaminoglycan heparan sulfate, which plays an important role in renal structure and function [7,8]. The purpose of the present study was to determine specific effects of two types of dietary fiber on the composition of
kidney glycoconjugates in an animal model of diabetes type I. Streptozotocin-treated diabetic rats were fed either a control diet or diets containing 10% wheat bran (insoluble dietary fiber) or 5% guar gum (soluble dietary fiber). Effects of these fibers on glycaemic control and nephropathy were assessed using previously described methodologies. The effect of dietary fiber in the glycoconjugate composition of kidneys of control and diabetic animals was studied by estimating their total hexose content, sulfated glycosaminoglycans,
hexosamines and uronic acids. The activities of enzymes that participate in the synthesis of saccharides and glycoconjugates (L-glutamine-fructose-6-phosphate aminotransferase) and their degradation (N-acetyl-β-glucosaminidase and β-glucuronidase) were also evaluated. Results indicated that both soluble and insoluble dietary fibers ameliorated a significant increase in the activity of GFAT. Heparan sulfate was also isolated and quantified. Results indicated that the renal content of heparan sulfate decreased in diabetic animals and that this decrement was ameliorated by the ingestion of both soluble and insoluble fiber in the diet.
 
Date 2003
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://ir.cftri.com/1227/1/Journal_of_Nutritional_Biochemistry_14_%282003%29_203-210.pdf
Nandini, Chilkunda D. and Sambaiah, Kari and Salimath, P. V. (2003) Dietary fibres ameliorate decreased synthesis of heparan sulphate in streptozotocin induced diabetic rats. Journal of Nutritional Biochemistry, 14. pp. 203-216.