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Explanted glomeruli: utility and limitations.

M Kitamura1, Y Ishikawa, T Konta

  • 1Department of Medicine, Royal Free and University College Medical School, University College London, Jules Thorn Institute, Middlesex Hospital, London, UK. m.kitamura@ucl.ac.uk

Experimental Nephrology
|September 11, 2001
PubMed
Summary
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Ex vivo incubation of isolated glomeruli causes podocyte apoptosis and gene expression changes. This study examines the effects of glomeruli isolation on structure and function.

Area of Science:

  • Nephrology
  • Cell Biology
  • Biochemistry

Background:

  • Ex vivo incubation of isolated glomeruli is a common technique for studying glomerular biochemistry.
  • The impact of isolation and incubation on glomerular structure and function remains poorly understood.

Purpose of the Study:

  • To investigate the effects of ex vivo incubation on isolated normal glomeruli.
  • To assess changes in podocyte apoptosis, mitogen-activated protein kinase (MAPK) family activation, and gene expression.

Main Methods:

  • Isolation of normal glomeruli for ex vivo incubation.
  • Assessment of podocyte apoptosis.
  • Analysis of MAPK family activation.
  • Gene expression profiling for activator protein 1 (AP-1) regulated genes.

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Main Results:

  • Ex vivo incubation led to significant podocyte apoptosis.
  • Activation of the MAPK signaling pathway was observed.
  • Expression of several AP-1 regulated genes increased.

Conclusions:

  • Glomeruli isolation and ex vivo incubation induce detrimental changes in glomeruli, including podocyte apoptosis and altered gene expression.
  • The utility and limitations of explanted glomeruli as a model system require careful consideration.