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Related Experiment Videos

Platelet interactions with Candida albicans

K G Skerl, R A Calderone, T Sreevalsan

    Infection and Immunity
    |December 1, 1981
    PubMed
    Summary
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    Human platelets contain components that stimulate Candida albicans germ tube formation. Platelet-poor plasma also contains factors that activate platelet aggregation in response to C. albicans, involving the complement system.

    Area of Science:

    • Immunology
    • Microbiology
    • Hematology

    Background:

    • The interaction between human platelets and Candida albicans is crucial in host defense.
    • Understanding these interactions can reveal new therapeutic targets for fungal infections.

    Purpose of the Study:

    • To investigate the role of human platelet components in stimulating Candida albicans germ tube formation.
    • To explore the mechanisms underlying platelet aggregation induced by Candida albicans cell wall components.

    Main Methods:

    • Platelet-rich plasma and platelet extracts were used to assess effects on C. albicans germ tube formation.
    • Biochemical characterization (heat stability, enzyme sensitivity, ion-exchange chromatography) of the active platelet component.
    • Analysis of platelet aggregation induced by C. albicans cell wall fractions using platelet-poor and platelet-rich plasma.

    Related Experiment Videos

  • Investigation of complement system involvement using heat inactivation and cobra venom factor.

    • Main Results:

    • A heat-stable, trypsin-sensitive platelet extract component stimulated C. albicans germ tube formation.
    • This active component exhibited cationic properties and heparin-binding affinity.
    • Platelet-derived growth factor also promoted germination under specific conditions.
    • Candida albicans cell wall fractions induced platelet aggregation in the presence of platelet-poor plasma.
    • The aggregation response was mediated by heat-labile factors in platelet-poor plasma, suggesting complement involvement.

    Conclusions:

    • Human platelets possess components that promote C. albicans morphogenesis.
    • The complement system, particularly the alternate pathway, plays a significant role in platelet aggregation triggered by C. albicans.
    • These findings highlight a complex interplay between platelets, fungi, and the immune system.