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Biochemical and morphological changes in the developing kidney

V L Kahane1, J C Cutrin, C P Setton

  • 1Instituto de Química y Fisicoquímica Biológica (IQUIFIB). Buenos Aires, Argentina.

Biology of the Neonate
|January 1, 1995
PubMed
Summary
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Kidney development varies by zone. Rat renal papilla matures early, while the cortex and medulla show significant biochemical changes and growth postnatally.

Area of Science:

  • Biochemistry
  • Developmental Biology
  • Nephrology

Background:

  • Postnatal kidney development involves complex changes in cellular composition and function.
  • Understanding zonal differences in kidney development is crucial for identifying maturational processes.

Purpose of the Study:

  • To investigate postnatal developmental changes in microsomal phospholipid, cholesterol, and protein concentrations in rat renal papilla, medulla, and cortex.
  • To correlate these biochemical parameters with morphological changes and DNA concentration across kidney zones.

Main Methods:

  • Microsomal fractions were isolated from rat renal papilla, medulla, and cortex at different postnatal ages (10-70 days).
  • Concentrations of phospholipids, cholesterol, proteins, and DNA were quantified in each fraction.

Related Experiment Videos

  • Biochemical data were analyzed in relation to developmental stage and kidney zone.

    • Main Results:

    • Papillary microsomal parameters (phospholipids, proteins, cholesterol) and DNA concentration remained unchanged during postnatal development.
    • Medullary microsomal phospholipid concentration increased significantly, while DNA concentration decreased from 10 to 70 days.
    • Renal cortical biochemical parameters increased significantly, but DNA concentration markedly decreased during development.

    Conclusions:

    • Kidney development exhibits distinct zonal patterns, with the renal papilla showing early maturation in rats.
    • The renal cortex and medulla undergo significant biochemical and cellular changes during postnatal development.
    • These findings highlight differential maturation rates across rat kidney zones.