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A low glycaemic diet improves oral glucose tolerance but has no effect on β-cell function in C57BL/6J mice.

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Author

Summary, in English

AIM: Clinical studies have suggested a role for dietary glycaemic index (GI) in body weight regulation and diabetes risk. Here, we investigated the long-term metabolic effects of low and high glycaemic diets using the C57BL/6J mouse model. METHODS: Female C57BL/6J mice were fed low or high glycaemic starch in either low-fat or medium-fat diets for 22 weeks. Oral and intravenous glucose tolerance tests were performed to investigate the effect of the experimental diets on glucose tolerance and insulin resistance. RESULTS: In this study, a high glycaemic diet resulted in impaired oral glucose tolerance compared to a low glycaemic diet. This effect was more pronounced in the group fed a medium-fat diet, suggesting that a lower dietary fat content ameliorates the negative effect of a high glycaemic diet. No effect on body weight or body fat content was observed in either a low-fat diet or a medium-fat diet. Static incubation of isolated islets did not show any differences in basal (3.3 mM glucose) or glucose-stimulated (8.6 and 16.7 mM glucose) insulin secretion between mice fed a low or high glycaemic diet. CONCLUSION: Together, our data suggest that the impaired glucose tolerance seen after a high glycaemic diet is not explained by altered β-cell function.

Publishing year

2010

Language

English

Pages

976-982

Publication/Series

Diabetes, Obesity and Metabolism

Volume

12

Issue

11

Document type

Journal article

Publisher

Wiley-Blackwell

Topic

  • Endocrinology and Diabetes

Keywords

  • body composition
  • beta-cell
  • glycaemic control

Status

Published

Project

  • ANTIDIABETIC FOOD CENTRE

Research group

  • Molecular Endocrinology

ISBN/ISSN/Other

  • ISSN: 1462-8902