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Related Experiment Videos

Methadone binding to human plasma albumin.

G D Olsen

    Science (New York, N.Y.)
    |May 5, 1972
    PubMed
    Summary

    Methadone binding to human albumin is not affected by methadone concentration. However, higher albumin concentrations significantly increase the percentage of methadone bound to albumin.

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    Area of Science:

    • Pharmacology
    • Biochemistry
    • Protein Binding

    Background:

    • Human plasma albumin is a primary binding protein for many drugs.
    • Understanding drug-protein interactions is crucial for pharmacokinetics and pharmacodynamics.

    Purpose of the Study:

    • To investigate the binding interaction between L-[1-(3)H] methadone and human plasma albumin.
    • To determine how varying concentrations of methadone and albumin affect binding.

    Main Methods:

    • Equilibrium dialysis was employed to study the binding of radiolabeled L-[1-(3)H] methadone.
    • Albumin concentrations were varied from 0.400 to 5.00 g/100 mL.

    Main Results:

    • Methadone binding to albumin was largely independent of methadone concentration.
    • A positive correlation was observed between albumin concentration and the percentage of methadone bound.
    • Binding increased from 8.0% to 43.8% with rising albumin levels.

    Conclusions:

    • Albumin concentration is a key determinant of methadone binding in human plasma.
    • These findings have implications for understanding methadone distribution and efficacy.

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