Current therapeutic interventions in the glycation pathway: evidence from clinical studies

L Engelen1, C D A Stehouwer, C G Schalkwijk

  • 1Department of Internal Medicine, CARIM School for Cardiovascular Diseases, Maastricht University Medical Centre, Maastricht, The Netherlands.

Insights

Clinical evidence for interventions targeting advanced glycation endproducts (AGEs) to prevent diabetes complications is currently weak. Specific AGE inhibitors and breakers show safety or efficacy concerns, and B vitamin data is limited.

Area of Science:

  • Endocrinology
  • Metabolic Diseases
  • Vascular Biology

Background:

  • Increased formation of advanced glycation endproducts (AGEs) is linked to diabetic micro- and macrovascular complications.
  • In vitro and animal studies suggest interventions like aminoguanidine, alagebrium, pyridoxamine, thiamine, and benfotiamine can inhibit AGE formation or action.

Purpose of the Study:

  • To review current clinical evidence on interventions targeting the glycation pathway for diabetic vascular disease.
  • To assess the clinical benefits of specific AGE inhibitors and breakers.
  • To evaluate potential AGE-inhibiting effects of therapies not primarily developed for glycation.

Main Methods:

  • Systematic review of clinical studies evaluating AGE inhibitors, AGE breakers, and other therapies with potential AGE-inhibiting effects.
  • Analysis of safety and efficacy data from human trials.
  • Assessment of study designs and measurement techniques for AGE-related therapies.

Main Results:

  • Clinical studies on aminoguanidine (AGE inhibitor) and alagebrium (AGE breaker) raise concerns regarding safety and/or efficacy.
  • Limited clinical evidence exists for the AGE-inhibiting effects of B vitamins (pyridoxamine, thiamine, benfotiamine).
  • Evidence for AGE inhibition by unrelated therapies is hampered by heterogeneous and often sub-optimal study designs and measurement techniques.

Conclusions:

  • Current clinical evidence supporting interventions to inhibit AGE formation or action in diabetes is weak and unconvincing.
  • Further well-designed clinical trials are needed to establish the safety and efficacy of AGE-targeted therapies.

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