Selenium nanoparticles involve HSP-70 and SIRT1 in preventing the progression of type 1 diabetic nephropathy

Chem Biol Interact. 2014 Nov 5:223:125-33. doi: 10.1016/j.cbi.2014.09.017. Epub 2014 Oct 6.

Abstract

The present study was undertaken to examine the protective effect of selenium nanoparticles (SeNPs) in the progression of diabetic nephropathy (DN). Diabetes was induced in male Sprague Dawley (SD) rats by injecting streptozotocin (STZ) (55mg/kg, i.p). DN was then assessed by measuring blood urea nitrogen (BUN), creatinine, albumin, fibronectin and collagen. Changes in the expression of cytoprotective and apoptotic proteins in the kidney of rats were also examined. Herein we show that SeNPs effectively lowered the levels of BUN, creatinine, fibronectin and collagen and elevated the levels of albumin in diabetic rats. Histological observation corroborated with the above protective effects of SeNPs. Interestingly, SeNPs elevated the levels of heat shock protein (HSP-70), longevity protein SIRT 1 and also modulated apoptotic proteins Bax and Bcl-2 in diabetic kidney. Our data represents a paradigm shift in our understanding about the therapeutic potential of SeNPs in preventing DN by not only quenching oxidative stress but also by activating cyto-protective protein HSP70 and longevity protein SIRT1.

Keywords: Apoptosis; Diabetic nephropathy; HSP-70; Selenium nanoparticles.

MeSH terms

  • Animals
  • Apoptosis / drug effects
  • Collagen Type IV / metabolism
  • Diabetes Mellitus, Experimental / drug therapy
  • Diabetes Mellitus, Experimental / metabolism
  • Diabetes Mellitus, Experimental / pathology
  • Diabetes Mellitus, Type 1 / drug therapy*
  • Diabetes Mellitus, Type 1 / metabolism*
  • Diabetes Mellitus, Type 1 / pathology
  • Diabetic Nephropathies / drug therapy*
  • Diabetic Nephropathies / metabolism*
  • Diabetic Nephropathies / pathology
  • Disease Progression
  • Fibronectins / metabolism
  • HSP70 Heat-Shock Proteins / metabolism*
  • Kidney / drug effects
  • Kidney / metabolism
  • Kidney / pathology
  • Male
  • Nanoparticles
  • Oxidative Stress / drug effects
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • Rats
  • Rats, Sprague-Dawley
  • Selenium / pharmacology*
  • Sirtuin 1 / metabolism*
  • bcl-2-Associated X Protein / metabolism

Substances

  • Bax protein, rat
  • Collagen Type IV
  • Fibronectins
  • HSP70 Heat-Shock Proteins
  • Proto-Oncogene Proteins c-bcl-2
  • bcl-2-Associated X Protein
  • Sirt1 protein, rat
  • Sirtuin 1
  • Selenium