The Sulforaphane and pyridoxamine supplementation normalize endothelial dysfunction associated with type 2 diabetes

Sci Rep. 2017 Oct 30;7(1):14357. doi: 10.1038/s41598-017-14733-x.

Abstract

In this study we investigate pyridoxamine (PM) and/or sulforaphane (SFN) as therapeutic interventions to determine whether activators of NFE2-related factor 2 (Nrf2) can be used in addition with inhibitors of advanced glycation end products (AGE) formation to attenuate oxidative stress and improve endothelial dysfunction in type 2 diabetes. Goto-kakizaki (GK) rats, an animal model of non-obese type 2 diabetes, were treated with or without PM and/or SFN during 8 weeks and compared with age-matched Wistar rats. At the end of the treatment, nitric oxide (NO)-dependent and independent vasorelaxation in isolated aorta and mesenteric arteries were evaluated. Metabolic profile, NO bioavailability and vascular oxidative stress, AGE and Nrf2 levels were also assessed. Diabetic GK rats presented significantly lower levels of Nrf2 and concomitantly exhibited higher levels of oxidative stress and endothelial dysfunction. PM and SFN as monotherapy were capable of significantly improving endothelial dysfunction in aorta and mesenteric arteries decreasing vascular oxidative damage, AGE and HbA1c levels. Furthermore, SFN + PM proved more effective reducing systemic free fatty acids levels, normalizing endothelial function, NO bioavailability and glycation in GK rats. Activators of Nrf2 can be used therapeutically in association with inhibitors of AGE and cross-linking formation to normalize endothelial dysfunction in type 2 diabetes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Aorta / metabolism
  • Diabetes Mellitus, Type 2 / complications
  • Diabetes Mellitus, Type 2 / drug therapy*
  • Diabetes Mellitus, Type 2 / metabolism
  • Dietary Supplements
  • Disease Models, Animal
  • Endothelium / drug effects
  • Endothelium / metabolism
  • Endothelium, Vascular / metabolism
  • Glycation End Products, Advanced / antagonists & inhibitors
  • Glycation End Products, Advanced / metabolism
  • Isothiocyanates / pharmacology*
  • Male
  • Mesenteric Arteries / drug effects
  • NF-E2-Related Factor 2 / drug effects
  • Nitric Oxide / metabolism
  • Oxidative Stress / drug effects
  • Pyridoxamine / pharmacology*
  • Rats
  • Rats, Wistar
  • Sulfoxides
  • Vascular Diseases / physiopathology
  • Vasodilation / drug effects

Substances

  • Glycation End Products, Advanced
  • Isothiocyanates
  • NF-E2-Related Factor 2
  • Nfe2l2 protein, rat
  • Sulfoxides
  • Nitric Oxide
  • Pyridoxamine
  • sulforaphane