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Related Experiment Videos

Apoptosis parallels ceramide content in the developing rat kidney.

R K Malik1, B A Thornhill, A Y Chang

  • 1Department of Pediatrics, PO Box 800386, University of Virginia, Health Sciences Center, Charlottesville, VA 22908, USA.

Pediatric Nephrology (Berlin, Germany)
|February 24, 2001
PubMed
Summary

Developing rat kidneys show a significant decrease in ceramide and apoptosis from fetal to adult stages. These changes are tissue-specific, with higher ceramide levels in the kidney compared to lung and liver.

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Area of Science:

  • Biochemistry
  • Developmental Biology
  • Cell Biology

Background:

  • Ceramide, a hydrophobic sphingolipid, is implicated in cell differentiation and apoptosis.
  • Apoptosis is crucial for cellular remodeling during renal morphogenesis.

Purpose of the Study:

  • To measure ceramide content and apoptosis in developing rat kidneys.
  • To investigate the tissue-specificity of ceramide changes during maturation by comparing kidney, lung, and liver.
  • To explore the relationship between ceramide levels and apoptosis during kidney development.

Main Methods:

  • Quantification of ceramide using the diacylglycerol kinase assay.
  • Assessment of apoptosis via the TUNEL technique.
  • Comparative analysis of ceramide content across fetal, neonatal, and adult rat kidney, lung, and liver tissues.

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Main Results:

  • Renal ceramide content decreased over 100-fold from fetal to the 7th postnatal day.
  • Renal apoptosis showed a parallel decrease of over 300-fold from fetal to adult life.
  • Lung and liver ceramide content were significantly lower than kidney and exhibited less maturational change.

Conclusions:

  • Maturational changes in ceramide content are specific to the kidney.
  • Elevated ceramide levels in the developing kidney may correlate with its high rate of apoptosis.
  • These findings highlight a potential role for ceramide in kidney development and cellular remodeling.