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Related Experiment Videos

Nutrient-induced insulin resistance.

J Proietto1, A Filippis, C Nakhla

  • 1Department of Medicine, University of Melbourne, Royal Melbourne Hospital, Parkville, Victoria, Australia. j.proietto@medicine.unimelb.edu.au

Molecular and Cellular Endocrinology
|July 20, 1999
PubMed
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Excess nutrients, not genetics, likely cause insulin resistance in type 2 diabetes. Both high glucose and fat impair insulin action, with fat also affecting glucose production.

Area of Science:

  • Endocrinology
  • Metabolic Diseases
  • Nutritional Science

Background:

  • Type 2 diabetes affects over 200 million people.
  • Insulin resistance is a key feature of type 2 diabetes.
  • Genetic causes for insulin resistance remain largely unidentified.

Purpose of the Study:

  • To review evidence linking excess nutrient supply to insulin resistance.
  • To explore the roles of glucose and fat in impaired insulin function.
  • To discuss potential mechanisms of nutrient-induced insulin resistance.

Main Methods:

  • Literature review of studies on nutrient supply and insulin resistance.
  • Analysis of evidence implicating glucose and fat.
  • Examination of molecular mechanisms affecting insulin signaling.

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Main Results:

  • Excessive glucose intake contributes to insulin resistance in muscle and adipose tissue.
  • Excessive fat intake causes insulin resistance in muscle and adipose tissue.
  • High fat levels impair the body's ability to suppress glucose production.

Conclusions:

  • Nutrient excess, particularly glucose and fat, is a significant factor in insulin resistance.
  • Both glucose and fat can independently impair insulin action through various mechanisms.
  • A common mechanism may underlie nutrient-induced insulin resistance for both macronutrients.