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Original Contributions

Effect of Exercise Training and Sucrose Feeding on Insulin-stimulated Glucose Uptake in Rats with Streptozotocin-induced Insulin-deficient Diabetes

  1. Elisabetta Dall'aglio,
  2. Fred Chang,
  3. Helen Chang,
  4. Diana Wright and
  5. Gerald M Reaven
  1. Department of Medicine, Stanford University School of Medicine, and the Veterans Administration Medical Center Palo Alto, California Department of Nutrition, University of California Davis, California
  1. Address reprint requests to Dr. Gerald M. Reaven, Department of Medicine, Geriatric Research, Education and Clinical Center (182B), Veterans Administration Medical Center, 3801 Miranda Avenue, Palo Alto, California 94304.
Diabetes 1983 Feb; 32(2): 165-168. https://doi.org/10.2337/diab.32.2.165
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Abstract

The effect of exercise training and a sucrose-rich diet on insulin-stimulated glucose disposal was studied in rats with streptozotocin-induced insulin deficiency. Rats were injected with streptozotocin (40 mg/kg), and 3 days later divided into three groups with equal degrees of hyperglycemia. One group of rats was allowed to run spontaneously on exercise wheels, another group remained sedentary but ate a sucrose-rich diet (66% sucrose), and the third also remained sedentary but consumed conventional rat chow. Three weeks later, we determined the effect of these various programs on postabsorptive plasma glucose and insulin levels, as well as on the ability of exogenous insulin to stimulate disposal of a glucose load during a period in which endogenous insulin was suppressed by epinephrine and propanolol. Basal plasma insulin levels were the same in all three groups, but plasma glucose levels were significantly lower (P < 0.001) in exercise-trained rats, and significantly higher (P < 0.05) in sucrose-fed rats, than in chow-fed diabetic rats. The inference that exercise training markedly enhanced insulin action in rats with insulin deficiency was borne out by direct estimation of insulin-stimulated glucose disposal. In contrast, sucrose-fed diabetic rats seemed to be more insulin-resistant than chow-fed diabetic rats. These results provide direct evidence that spontaneous exercise can dramatically attenuate the severity of diabetes in insulin-deficient rats by enhancing insulin action.

  • Received June 10, 1982.
  • Revision received September 16, 1982.
  • Copyright © 1983 by the American Diabetes Association

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February 1983, 32(2)
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Effect of Exercise Training and Sucrose Feeding on Insulin-stimulated Glucose Uptake in Rats with Streptozotocin-induced Insulin-deficient Diabetes
Elisabetta Dall'aglio, Fred Chang, Helen Chang, Diana Wright, Gerald M Reaven
Diabetes Feb 1983, 32 (2) 165-168; DOI: 10.2337/diab.32.2.165

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Effect of Exercise Training and Sucrose Feeding on Insulin-stimulated Glucose Uptake in Rats with Streptozotocin-induced Insulin-deficient Diabetes
Elisabetta Dall'aglio, Fred Chang, Helen Chang, Diana Wright, Gerald M Reaven
Diabetes Feb 1983, 32 (2) 165-168; DOI: 10.2337/diab.32.2.165
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