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Related Experiment Videos

Permanent bile duct cannulation in the monkey. A model for studying intestinal absorption.

J Meszaros, F Nimmerfall, J Rosenthaler

    European Journal of Pharmacology
    |June 1, 1975
    PubMed
    Summary

    This study developed a low-stress animal model for repeated biliary excretion sampling in Rhesus monkeys, crucial for studying intestinal absorption of bile-excreted compounds.

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    Area of Science:

    • Pharmacology and Toxicology
    • Animal Models
    • Gastroenterology

    Background:

    • Assessing intestinal absorption of compounds excreted via bile requires reliable methods for biliary excretion sampling.
    • Existing animal models may involve excessive stress or restraint, limiting prolonged or repeated sampling.
    • Understanding biliary excretion is vital for drug development and pharmacokinetic studies.

    Purpose of the Study:

    • To establish a minimally stressful experimental model for Rhesus monkeys.
    • To enable repeated sampling of biliary excretion over extended periods.
    • To facilitate the study of intestinal absorption of bile-excreted compounds.

    Main Methods:

    • Development of specialized cannulas with unique end-pieces for Rhesus monkeys.

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  • Surgical insertion of cannulas into the common bile duct.
  • Observation of bile flow and animal response during prolonged experimentation.
  • Administration of radioactive ergotamine to assess model utility.

    • Main Results:

    • The developed model allowed for full freedom of movement post-cannula insertion.
    • Rhesus monkeys exhibited a characteristic adaptation by forming collateral bile pathways around the cannula.
    • This adaptation was not observed in dogs or minipigs, highlighting species specificity.
    • The model proved suitable for studying the biliary excretion of radioactive ergotamine.

    Conclusions:

    • A novel, low-stress experimental model for Rhesus monkeys was successfully developed.
    • The model facilitates repeated biliary excretion sampling and study of intestinal absorption.
    • Species-specific adaptive responses in bile flow were identified in Rhesus monkeys.
    • This model offers a valuable tool for pharmacokinetic and drug metabolism research.