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Related Experiment Videos

A serum mannan-binding protein and candidiasis.

F G Bull, N R Turner

    Sabouraudia
    |January 1, 1984
    PubMed
    Summary

    Rabbit mannan-binding protein (MBP) agglutinates yeast in a calcium-dependent way. MBP binding is inhibited by yeast mannan and serum from patients with candidiasis, suggesting diagnostic and pathogenic roles.

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    Area of Science:

    • Immunology
    • Microbiology
    • Biochemistry

    Background:

    • Mannan-binding protein (MBP) is a key component of the innate immune system.
    • MBP recognizes carbohydrate structures on microbial surfaces, initiating complement activation.
    • Saccharomyces cerevisiae is a yeast commonly associated with opportunistic infections.

    Purpose of the Study:

    • To characterize the interaction of rabbit MBP with Saccharomyces cerevisiae.
    • To investigate the specificity of MBP binding to carbohydrate ligands.
    • To explore the potential diagnostic and pathogenic roles of MBP in candidiasis.

    Main Methods:

    • Purification of mannan-binding protein from rabbit serum.
    • Agglutination assays using Saccharomyces cerevisiae.
    • Inhibition assays with yeast mannan and patient serum.

    Main Results:

    • Rabbit MBP demonstrated Ca2+-dependent agglutination of Saccharomyces cerevisiae.
    • MBP binding was inhibited by yeast mannan (10 ng/ml).
    • Serum from patients with suspected deep-seated candidiasis also reduced MBP binding.

    Conclusions:

    • Rabbit MBP specifically binds to Saccharomyces cerevisiae in a calcium-dependent manner.
    • The binding interaction is inhibited by specific carbohydrate structures and patient serum, indicating potential diagnostic utility.
    • MBP may play a significant role in the pathogenesis of candidiasis and could be a target for diagnostic strategies.

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