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Platelet adhesion onto artificial red blood cells

N Muramatsu, T Kondo

    Journal of Biomedical Materials Research
    |May 1, 1980
    PubMed
    Summary

    Polyamide microcapsules for artificial red blood cells were developed. Platelet adhesion was observed in plasma, influenced by microcapsule surface charge, suggesting plasma factors are key for hemocompatibility.

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    Area of Science:

    • Biomaterials Science
    • Biomedical Engineering
    • Polymer Chemistry

    Background:

    • Development of artificial red blood cells is crucial for clinical applications.
    • Hemocompatibility, particularly platelet adhesion, is a key challenge for biomaterials.
    • Polyamide microcapsules offer potential as carriers for therapeutic agents.

    Purpose of the Study:

    • To synthesize polyamide microcapsules containing mammalian hemolysate.
    • To evaluate the blood compatibility of these microcapsules, focusing on platelet adhesion.
    • To assess the potential clinical use of these microcapsules as artificial red blood cells.

    Main Methods:

    • Interfacial polycondensation of diamines and terephthaloyl dichloride to form microcapsules.
    • Loading of mammalian hemolysate into the prepared polyamide microcapsules.
    • In vitro assessment of platelet adhesion to microcapsules in the presence and absence of plasma.
    • Evaluation of the effect of microcapsule surface charge on platelet adhesion.

    Main Results:

    • Polyamide microcapsules loaded with hemolysate were successfully synthesized.
    • Rabbit platelets adhered to hemolysate-loaded microcapsules only in the presence of plasma.
    • Platelet adhesion increased with increasing negative surface charge on the microcapsules.
    • A quantitative method for assessing platelet adhesion over time was developed.

    Conclusions:

    • Plasma components play a significant role in mediating platelet adhesion to hemolysate-loaded microcapsules.
    • Surface charge of polyamide microcapsules critically influences platelet interaction.
    • The developed microcapsules show promise for artificial red blood cell applications, pending further hemocompatibility studies.
    • The quantitative adhesion assay is suitable for kinetic studies of platelet-microcapsule interactions.

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