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Protein binding to iothalamate ethyl ester.

M R Violante, M E Shapiro, H W Fischer

    Investigative Radiology
    |March 1, 1979
    PubMed
    Summary
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    Fibrinogen binding to iothalamate ethyl ester particles causes aggregation in plasma. This interaction is key to preventing flocculation in potential hepatolienographic agents.

    Area of Science:

    • Biomedical Engineering
    • Materials Science
    • Hematology

    Background:

    • Particulate hepatolienographic agents face challenges with particle aggregation in blood.
    • Iothalamate ethyl ester, a potential agent, exhibits moderate to severe flocculation when mixed with plasma.

    Purpose of the Study:

    • To investigate the binding of plasma proteins to iothalamate ethyl ester particles.
    • To identify the specific proteins responsible for particle aggregation.

    Main Methods:

    • Reversible adsorption of plasma to iothalamate ethyl ester particle preparations.
    • Fractionation of particle-plasma complexes using buffers of varying ionic strength and pH.
    • Analysis of bound proteins using polyacrylamide disc gel electrophoresis.

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    Main Results:

    • Electrophoresis identified three distinct protein bands: prealbumin, albumin, and fibrinogen.
    • Flocculation occurred specifically when particles were exposed to plasma.

    Conclusions:

    • The interaction between fibrinogen and iothalamate ethyl ester particles is a primary cause of agglutination.
    • Understanding this interaction is crucial for developing stable hepatolienographic agents.