Sustained kidney biochemical derangement in treated experimental diabetes: a clue to metabolic memory

Sci Rep. 2017 Jan 12:7:40544. doi: 10.1038/srep40544.

Abstract

The occurrence of biochemical alterations that last for a long period of time in diabetic individuals even after adequate handling of glycemia is an intriguing phenomenon named metabolic memory. In this study, we show that a kidney pathway is gradually altered during the course of diabetes and remains persistently changed after late glycemic control in streptozotocin-induced diabetic rats. This pathway comprises an early decline of uric acid clearance and pAMPK expression followed by fumarate accumulation, increased TGF-β expression, reduced PGC-1α expression, and downregulation of methylation and hydroxymethylation of mitochondrial DNA. The sustained decrease of uric acid clearance in treated diabetes may support the prolonged kidney biochemical alterations observed after tight glycemic control, and this regulation is likely mediated by the sustained decrease of AMPK activity and the induction of inflammation. This manuscript proposes the first consideration of the possible role of hyperuricemia and the underlying biochemical changes as part of metabolic memory in diabetic nephropathy development after glycemic control.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenylate Kinase / metabolism
  • Animals
  • Blood Glucose / metabolism
  • DNA, Mitochondrial / metabolism
  • Diabetes Mellitus, Experimental / metabolism*
  • Diabetes Mellitus, Experimental / pathology*
  • Diabetes Mellitus, Experimental / physiopathology
  • Fasting / blood
  • Fumarates / metabolism
  • Hyperglycemia / blood
  • Hyperglycemia / physiopathology
  • Kidney / metabolism*
  • Kidney / pathology*
  • Kidney / physiopathology
  • Male
  • Malondialdehyde / metabolism
  • Mitochondria / metabolism
  • Models, Biological
  • Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha / metabolism
  • Phosphorylation
  • Rats, Wistar
  • Transforming Growth Factor beta / metabolism

Substances

  • Blood Glucose
  • DNA, Mitochondrial
  • Fumarates
  • Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha
  • Ppargc1a protein, rat
  • Transforming Growth Factor beta
  • Malondialdehyde
  • Adenylate Kinase