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Related Experiment Videos

Uric acid excretion by the pig kidney

H A Simmonds, P J Hatfield, J S Cameron

    The American Journal of Physiology
    |June 1, 1976
    PubMed
    Summary

    The pig kidney exclusively eliminates uric acid through filtration and secretion. Studies show net secretion, with probenecid inhibiting this process but not altering overall excretion significantly.

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    Area of Science:

    • Nephrology
    • Renal Physiology
    • Uric Acid Metabolism

    Background:

    • Uric acid handling by the kidney is crucial for maintaining homeostasis.
    • Understanding renal mechanisms of uric acid excretion is vital for metabolic research.

    Purpose of the Study:

    • To investigate the renal handling of uric acid in pigs.
    • To determine if the pig kidney secretes or reabsorbs uric acid.
    • To examine the effects of specific drugs on uric acid excretion in pigs.

    Main Methods:

    • Continuous urate infusion in unrestrained, unanesthetized pigs.
    • Measurement of urate-to-inulin clearance ratios.
    • Administration of probenecid, pyrazinamide, and pyrazinoic acid.

    Main Results:

    • Pig kidneys demonstrated net uric acid secretion (urate-to-inulin clearance > 1).
    • Secretion was independent of urine flow rate up to 10 ml/min.
    • Probenecid inhibited secretion; pyrazinamide and pyrazinoic acid had no significant effect on excretion.

    Conclusions:

    • The pig kidney eliminates uric acid solely via filtration and secretion.
    • The pig kidney's urate transport system differs from that in some other species regarding drug responses.

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