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Gentamicin nephrotoxicity in young rabbits.

T Kojima, T Kobayashi, S Iwase

    Experimental Pathology
    |January 1, 1984
    PubMed
    Summary
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    Gentamicin nephrotoxicity affects adult rabbits faster than young rabbits. Enzyme activity changes in adult kidneys occur earlier and in more areas than in young kidneys.

    Area of Science:

    • Nephrology
    • Pharmacology
    • Biochemistry

    Background:

    • Gentamicin is a widely used antibiotic with known nephrotoxic potential.
    • Understanding the temporal and regional differences in gentamicin-induced kidney damage is crucial for patient safety.

    Purpose of the Study:

    • To investigate the age-dependent differences in gentamicin nephrotoxicity in rabbits.
    • To compare the effects of gentamicin on Na-K-ATPase enzyme activity in young versus adult rabbits.

    Main Methods:

    • Two rabbit models were used: young (10-12 days) and growing (7-8 weeks).
    • Single gentamicin injection (150 mg/kg BW) was administered.
    • Na-K-ATPase enzyme activity was measured in kidney cortex and medulla at various time points (1-4 hours).

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    Main Results:

    • Adult rabbits showed increased Na-K-ATPase activity in both inner and outer cortex, with earlier changes in the outer cortex.
    • Young rabbits exhibited delayed Na-K-ATPase activity changes, confined to the inner cortex.
    • Medulla Na-K-ATPase activity remained unchanged in adult rabbits.

    Conclusions:

    • Gentamicin nephrotoxicity manifests earlier in adult rabbits compared to young rabbits.
    • Age influences the regional kidney response to gentamicin toxicity, specifically affecting Na-K-ATPase activity.
    • The inner cortex is the primary site of gentamicin-induced enzyme alteration in young rabbits.