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Related Experiment Video

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A Possible Zebrafish Model of Polycystic Kidney Disease: Knockdown of wnt5a Causes Cysts in Zebrafish Kidneys
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COX-2 gene dosage-dependent defects in kidney development.

Patrick Slattery1, Stefanie Frölich1, Yannik Schreiber2

  • 1Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany; and.

American Journal of Physiology. Renal Physiology
|March 18, 2016
PubMed
Summary

Loss of cyclooxygenase-2 (COX-2) gene function impairs kidney development and function. Even partial COX-2 inhibition or loss of one gene copy causes significant renal damage and reduced kidney function in mice.

Keywords:
cyclooxygenase-2kidney developmentnephrogenesisprostaglandins

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Area of Science:

  • Nephrology
  • Developmental Biology
  • Pharmacology

Background:

  • Cyclooxygenase-2 (COX-2) plays a critical role in kidney development, particularly during the 4-8 day postnatal period.
  • Deletion of COX-2 leads to impaired kidney development, characterized by hypotrophic glomeruli and cortical thinning.

Purpose of the Study:

  • To investigate the impact of varying COX-2 gene dosage and partial pharmacological inhibition on kidney development.
  • To determine if reduced COX-2 activity affects glomerular size, cortical development, and kidney function.

Main Methods:

  • Studied kidney development in COX-2(+/+), COX-2(+/-), and COX-2(-/-) mice.
  • Administered selective COX-2 inhibitor SC-236 at low and high doses to C57Bl6 mice postnatally.
  • Assessed kidney morphology, COX-2 mRNA and protein expression, prostaglandin synthesis, and markers of kidney function (serum creatinine, urea).

Main Results:

  • COX-2(+/-) mice exhibited impaired kidney development with reduced glomerular size and marginal cortical thinning.
  • Both COX-2(+/-) and COX-2(-/-) mice showed reduced juxtamedullary glomeruli size.
  • Pharmacological inhibition of COX-2 mimicked the renal defects observed in gene-deficient mice.
  • COX-2(+/-) mice displayed glomerulosclerosis and signs of kidney insufficiency, including elevated serum creatinine.

Conclusions:

  • Full function of both COX-2 gene alleles is essential for normal physiological kidney development in mice.
  • Loss of one COX-2 gene copy or partial COX-2 inhibition results in distinct renal damage and impaired kidney function.
  • COX-2 plays a crucial role in regulating glomerular development and maintaining kidney function throughout development.