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Related Experiment Videos

The activated mesangial cell: a glomerular "myofibroblast"?

R J Johnson1, J Floege, A Yoshimura

  • 1Department of Medicine, University of Washington, Seattle.

Journal of the American Society of Nephrology : JASN
|April 1, 1992
PubMed
Summary

Glomerular mesangial cells normally support kidney function but can become injurious when activated during injury. Targeting this harmful "myofibroblast" transformation offers new therapeutic avenues for glomerular diseases.

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Area of Science:

  • Nephrology
  • Cell Biology
  • Pathology

Background:

  • Glomerular mesangial cells perform vital functions in normal glomeruli, including growth factor production, structural support via matrix synthesis, and hemodynamic modulation.
  • In glomerular injury, mesangial cells can transform into a detrimental myofibroblast-like phenotype.

Purpose of the Study:

  • To investigate the phenotypic modulation of glomerular mesangial cells during injury.
  • To identify mechanisms driving mesangial cell activation and potential therapeutic targets.

Main Methods:

  • Analysis of mesangial cell characteristics in glomerular injury models.
  • Investigation of platelet-mediated proliferation and growth factor involvement.
  • Assessment of alpha-smooth muscle actin expression and collagen production.

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Main Results:

  • Activated mesangial cells exhibit myofibroblast-like properties, including proliferation.
  • Platelet-derived growth factor mediates mesangial cell proliferation.
  • Transformed cells express alpha-smooth muscle actin and produce interstitial collagens.

Conclusions:

  • The phenotypic switch of mesangial cells to a myofibroblast-like state contributes to glomerular injury.
  • Preventing this mesangial cell modulation presents a potential therapeutic strategy for glomerular diseases.