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Glycation and insulin resistance: novel mechanisms and unique targets?

Fei Song1, Ann Marie Schmidt

  • 1Division of Endocrinology, Department of Medicine, New York University School of Medicine, 550 First Ave, Smilow 901C, New York, NY 10016, USA.

Arteriosclerosis, Thrombosis, and Vascular Biology
|July 21, 2012
PubMed

Insights

Protein glycation, forming advanced glycation end products (AGEs), contributes to insulin resistance through various mechanisms. Limiting AGEs may help prevent insulin resistance and its complications.

Area of Science:

  • Biochemistry
  • Metabolic pathways
  • Signal transduction

Background:

  • Insulin resistance involves multiple complex pathways.
  • Protein glycation is a posttranslational modification process.
  • Advanced glycation end products (AGEs) form through endogenous and exogenous routes.

Purpose of the Study:

  • To review the role of protein glycation and AGEs in insulin resistance.
  • To explore the mechanisms by which AGEs contribute to insulin resistance.

Main Methods:

  • Review of existing scientific literature and evidence.
  • Analysis of biochemical and cellular pathways involved in glycation and insulin signaling.

Main Results:

  • AGEs contribute to insulin resistance via tumor necrosis factor-α, direct insulin modification, oxidative stress, and mitochondrial dysfunction.
  • AGEs engage cellular receptors (e.g., receptor for AGEs), perpetuating inflammation and stress.
  • AGEs reduce the activity of glyoxalase I, an enzyme that detoxifies AGE precursors.

Conclusions:

  • Glycation-promoting mechanisms can drive AGE production and tissue stress, reducing insulin responsiveness.
  • Strategies targeting AGE accumulation and action may prevent insulin resistance.
  • Understanding AGEs' role offers potential therapeutic targets for metabolic disorders.

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