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Antigen-induced decrease of salicylic acid absorption from the small intestine in actively immunized rats.

J Nakamura, A Yamamoto, S Takada

    Journal of Pharmacobio-Dynamics
    |April 1, 1982
    PubMed
    Summary
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    Systemic anaphylaxis in rats significantly reduced intestinal absorption of salicylic acid, particularly after multiple immunizations. This effect persisted for weeks, highlighting the impact of immune responses on drug absorption.

    Area of Science:

    • Immunology
    • Gastroenterology
    • Pharmacology

    Background:

    • Bovine gamma-globulin (BGG) immunization can induce systemic immune responses.
    • Intestinal absorption is crucial for drug bioavailability.
    • The impact of systemic anaphylaxis on intestinal drug absorption is not fully understood.

    Purpose of the Study:

    • To investigate the effect of systemic anaphylaxis on the intestinal absorption of salicylic acid in actively immunized rats.

    Main Methods:

    • Rats were immunized with BGG and challenged intravenously.
    • In situ recirculation technique was used to measure salicylic acid absorption in the small intestine.
    • Absorption was compared between challenged rats and saline controls.

    Main Results:

    Related Experiment Videos

    • Intravenous BGG challenge significantly decreased salicylic acid absorption in multiply immunized rats.
    • A single immunization did not significantly affect absorption.
    • The decreased absorption effect lasted for at least 5 weeks post-immunization.

    Conclusions:

    • Systemic anaphylaxis in actively immunized rats impairs intestinal absorption of salicylic acid.
    • The degree of impairment correlates with the number of immunizations.
    • These findings suggest a link between systemic immune reactions and gastrointestinal drug handling.