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Adenosine A2 a receptor stimulation prevents proteinuria in diabetic rats by promoting an anti-inflammatory phenotype

P Persson1, M Friederich-Persson1, A Fasching1

  • 1Division of Integrative Physiology, Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden.

Acta Physiologica (Oxford, England)
|April 21, 2015
PubMed
Abstract

Insights

Chronic stimulation of the adenosine A2a receptor (A2a AR) prevents kidney damage in diabetic rats. This approach reduces urinary protein and inflammation, offering potential new treatments for diabetic kidney disease.

Area of Science:

  • Nephrology
  • Endocrinology
  • Pharmacology

Background:

  • Diabetic patients face a heightened risk of kidney disease, a serious complication with limited therapeutic options.
  • Current treatments do not effectively preserve kidney function in individuals with diabetes.

Purpose of the Study:

  • To investigate the protective effects of chronic adenosine A2a receptor (A2a AR) stimulation on kidney function in diabetic rats.
  • To determine if A2a AR agonist treatment can mitigate kidney damage associated with diabetes.

Main Methods:

  • Streptozotocin-induced diabetic rats and control groups received chronic treatment with the A2a AR agonist CGS21680.
  • Kidney function, proteinuria, oxidative stress, and inflammatory markers were assessed.
  • Analysis included glomerular filtration rate, renal blood flow, and urinary protein excretion.

Main Results:

  • A2a AR stimulation completely prevented the significant increase in urinary protein excretion in diabetic rats.
  • While oxidative stress markers increased, inflammatory markers (TNF-α, IL-10) and macrophage infiltration were favorably modulated.
  • Glomerular damage and basement membrane thickening were reduced by A2a AR stimulation.

Conclusions:

  • Chronic A2a AR stimulation effectively prevents proteinuria and glomerular damage in experimental diabetes.
  • The protective mechanism involves an anti-inflammatory pathway, independent of effects on oxidative stress or kidney hypoxia.
  • Targeting the adenosine A2a receptor presents a promising strategy for managing diabetic kidney disease.
Keywords:
CGS21680diabetes mellitusdiabetic nephropathykidneymacrophagestumour necrosis factor-alpha

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