Related Experiment Video

Updated: Jan 10, 2026

Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation
06:39

Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation

Published on: August 19, 2020

6.0K

Mineralocorticoid receptor blockade quiesces parietal epithelial cell activation

Sandeep K Mallipattu1

  • 1Division of Nephrology, Department of Medicine, Stony Brook University, Stony Brook, New York, USA; Renal Section, Northport VA Medical Center, Northport, New York, USA.

Kidney International
|November 21, 2025
PubMed

Insights

Mineralocorticoid receptor inhibition effectively reduces kidney damage in glomerulonephritis. Blocking this receptor in parietal epithelial cells prevents glomerulosclerosis and albuminuria, offering a new therapeutic approach.

Area of Science:

  • Nephrology
  • Renal Pathology
  • Cell Biology

Background:

  • Podocyte injury triggers parietal epithelial cell (PEC) activation, leading to crescent formation and glomerulosclerosis.
  • Aberrant PEC proliferation and migration are key drivers of progressive kidney disease in glomerulonephritis.

Purpose of the Study:

  • To investigate the role of the mineralocorticoid receptor (MR) in activated PECs during glomerulonephritis.
  • To evaluate the therapeutic potential of MR inhibition in preclinical models of kidney disease with PEC activation.

Main Methods:

  • Utilized genetic and pharmacologic approaches to inhibit the MR in PECs.
  • Assessed key markers of kidney injury, including albuminuria, PEC activation/migration, and glomerulosclerosis.

Main Results:

  • Genetic and pharmacologic MR inhibition significantly reduced albuminuria.
  • Inhibition of MR in PECs blunted aberrant PEC activation, migration, and extracapillary proliferation.
  • MR inhibition attenuated the development of glomerulosclerosis.

Conclusions:

  • Targeting the MR in activated PECs is a promising therapeutic strategy for glomerulonephritis and focal segmental glomerulosclerosis.
  • Mineralocorticoid receptor antagonists may offer a novel treatment for kidney diseases characterized by PEC activation.

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