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Related Experiment Video

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Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation
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Published on: August 19, 2020

Pattern recognition and renal defence in crescentic glomerulonephritis.

Stefan P Berger1, Mohamed R Daha

  • 1Department of Nephrology, Leiden University Medical Center, PO Box 9600, 2300 RC, Leiden, the Netherlands. s.p.berger@lumc.nl

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|July 24, 2010
PubMed
Summary

Mice lacking the mannose receptor (MR) were protected from glomerulonephritis, showing reduced kidney damage and improved function. Absence of MR altered macrophage responses and mesangial cell apoptosis, suggesting a protective role in kidney disease.

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Area of Science:

  • Immunology
  • Nephrology
  • Cell Biology

Background:

  • Crescentic glomerulonephritis is a severe kidney disease characterized by rapid glomerular damage.
  • The mannose receptor (MR) is implicated in immune responses, but its specific role in glomerulonephritis is not fully understood.

Purpose of the Study:

  • To investigate the role of the mannose receptor (MR) in the development and progression of crescentic glomerulonephritis.
  • To elucidate the mechanisms by which MR influences kidney inflammation and function.

Main Methods:

  • Induction of an accelerated nephrotoxic model of glomerulonephritis in wild-type (WT) and MR-deficient mice.
  • In vitro experiments using macrophages and mesangial cells to assess cellular responses to immune complexes and apoptotic cells.
  • Analysis of kidney histology, proteinuria, renal function, macrophage infiltration, immunoglobulin deposition, and cytokine production.

Main Results:

  • MR-deficient mice were largely protected from glomerulonephritis, exhibiting less glomerular damage, proteinuria, and better renal function compared to WT mice.
  • MR-deficient macrophages showed a reduced oxygen burst response to immune complexes, and co-localization of MR and Fc-receptors was observed on macrophages.
  • Absence of MR led to increased mesangial cell proliferation and apoptosis, which in turn suppressed TNF-α production by macrophages, promoting an anti-inflammatory phenotype.

Conclusions:

  • The mannose receptor (MR) plays a significant role in mediating kidney damage during crescentic glomerulonephritis.
  • MR appears to enhance pro-inflammatory responses via interaction with Fc receptors and by modulating mesangial cell apoptosis.
  • Targeting MR could be a potential therapeutic strategy for managing glomerulonephritis.