Diabetic Glomerulopathy in the SHR/N-corpulent Rat: Role of Dietary Carbohydrate in a Model of NIDDM

Overview

Journal Diabetologia

Specialty Endocrinology

Date 1995 Jan 1

PMID 7744227

Citations 3

Authors

M T Velasquez

A A Abraham

P L Kimmel

O E Michaelis 4th

Affiliations

Soon will be listed here.

Abstract

We evaluated the course of diabetes and nephropathy in the SHR/N-cp (corpulent) rat characterized by genetic obesity, non-insulin-dependent diabetes (NIDDM), and hypertension, and examined whether the nephropathy in this model is influenced by the type of carbohydrate intake. Two groups of obese and lean SHR/N-cp rats were fed diets containing 54% carbohydrate, as either sucrose or starch for 3 months (group I) and 9 months (group II). After 3 months on either diet, group I obese rats had higher 2-h response serum glucose levels and urinary glucose excretion than lean rats. Sucrose feeding was associated with greater proteinuria and a higher percentage of abnormal glomeruli in obese rats. Morphometric evaluation of glomeruli (by computerized image analysis) showed greater mean renal corpuscular volume and mesangial fraction in obese than in lean rats fed similar diets. Mean renal corpuscular volume and mesangial fraction were also greater in sucrose-fed obese rats than in starch-fed obese rats. After 9 months, group II obese rats had substantial reductions in serum and urine glucose levels but they were still hyperinsulinaemic and showed more proteinuria than lean rats and a higher percentage of sclerotic glomeruli compared with group I obese rats. At this time, mean mesangial fraction but not renal corpuscular volume was still higher in obese than in lean rats.(ABSTRACT TRUNCATED AT 250 WORDS)

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