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Antibodies to fentanyl.

G L Henderson, J Frincke, C Y Leung

    The Journal of Pharmacology and Experimental Therapeutics
    |February 1, 1975
    PubMed
    Summary
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    Researchers developed high-affinity antibodies against fentanyl by immunizing rabbits. These antibodies are highly specific and useful for detecting fentanyl in biological samples using radioimmunoassay.

    Area of Science:

    • Immunology
    • Analytical Chemistry
    • Pharmacology

    Background:

    • Fentanyl is a potent synthetic opioid analgesic with significant clinical and illicit use.
    • Accurate detection and quantification of fentanyl are crucial for therapeutic drug monitoring and forensic analysis.
    • Development of specific antibodies is essential for sensitive immunoassay techniques.

    Purpose of the Study:

    • To generate high-affinity and highly specific antibodies against fentanyl.
    • To characterize the binding properties and specificity of the induced antibodies.
    • To validate the utility of these antibodies in a radioimmunoassay for fentanyl quantification.

    Main Methods:

    • Immunization of rabbits with a carboxyfentanyl-bovine gamma-globulin conjugate.

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  • Characterization of antibody titers and association constants.
  • Assessment of serological cross-reactivity with various compounds, including opiates and analgesics.
  • Development and application of a radioimmunoassay (RIA) for fentanyl detection.

    • Main Results:

    • High-titer antibodies capable of binding fentanyl were successfully induced.
    • Antibodies exhibited high average association constants (approx. 1 x 10^-7 L/mol).
    • Exceptional specificity was observed, with no cross-reactivity to other opiates or analgesics, only to fentanyl analogs.
    • The developed RIA accurately determined serum fentanyl concentrations in dogs.

    Conclusions:

    • The generated antibodies possess high affinity and specificity for fentanyl.
    • These antibodies are suitable for developing sensitive and selective immunoassays for fentanyl.
    • The radioimmunoassay provides a reliable method for quantifying fentanyl in biological samples.