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Visualization and Quantification of TGFβ/BMP/SMAD Signaling under Different Fluid Shear Stress Conditions using Proximity-Ligation-Assay
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Published on: September 14, 2021

PDE-5 inhibition impedes TSP-1 expression, TGF-beta activation and matrix accumulation in experimental

Bernd Hohenstein1, Christoph Daniel, Sandra Wittmann

  • 1Department of Nephrology and Hypertension, University Erlangen-Nuremberg, Erlangen, Germany. bernd.hohenstein@rzmail.uni-erlangen.de

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|July 4, 2008
PubMed
Abstract

Insights

Vardenafil, a PDE-5 inhibitor, reduced mesangial proliferation and matrix expansion in a rat model of glomerulonephritis. This suggests vardenafil

Area of Science:

  • Nephrology
  • Pharmacology
  • Cell Biology

Background:

  • Mesangial proliferative glomerulonephritis is characterized by matrix expansion and mesangial proliferation.
  • Phosphodiesterase type 5 (PDE-5) inhibitors, such as vardenafil, block cyclic GMP degradation.
  • This study explores PDE-5 inhibition's effects in an experimental glomerulonephritis model.

Purpose of the Study:

  • To investigate the therapeutic potential of vardenafil in mesangial proliferative glomerulonephritis.
  • To assess the impact of PDE-5 inhibition on key pathological features of the disease.

Main Methods:

  • Rats with induced glomerulonephritis were treated with vardenafil (10 mg/kg twice daily) or placebo.
  • Renal biopsies, glomerular isolates, urine, and blood samples were collected on Days 2 and 6 for analysis.
  • Immunohistochemistry (IHC) and Western blot (WB) were used to detect PDE-5 expression.

Main Results:

  • PDE-5 expression was low in healthy kidneys but increased in mesangial cells during disease.
  • Vardenafil treatment increased glomerular cyclic GMP levels, inhibited mesangial cell proliferation, and reduced matrix accumulation.
  • No significant effects were observed on renal function or inflammatory cell infiltration.
  • Vardenafil decreased TSP-1 and p-smad-2/3 levels, indicating an antifibrotic mechanism.

Conclusions:

  • Vardenafil demonstrated antiproliferative and antifibrotic effects in experimental glomerulonephritis.
  • The drug's safety profile and availability suggest potential clinical application for mesangial proliferative glomerulonephritis in humans.

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