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Lipids and the malarial parasite.

G G Holz

    Bulletin of the World Health Organization
    |January 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Plasmodium parasites alter erythrocyte lipid composition during development, impacting membrane properties. This lipid metabolism is crucial for parasite growth and survival, utilizing host lipids for essential functions.

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    Area of Science:

    • Malariology
    • Cell Biology
    • Biochemistry

    Background:

    • Plasmodium parasites infect erythrocytes, initiating development within a vacuole derived from the host cell membrane.
    • The erythrocyte membrane undergoes significant changes in lipid and protein distribution during infection.
    • Parasite growth and feeding activities correlate with increased membrane surface area.

    Purpose of the Study:

    • To investigate the lipid composition of Plasmodium parasites and infected erythrocytes.
    • To understand the parasite's lipid metabolism and its dependence on host-supplied components.
    • To explore the relationship between parasite lipid metabolism and erythrocyte membrane alterations.

    Main Methods:

    • Comparative analysis of lipid profiles between Plasmodium parasites and host erythrocytes.

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  • Investigation of lipid biosynthesis pathways utilized by the parasite.
  • Correlation of lipid metabolism with parasite growth, feeding, and membrane dynamics.

    • Main Results:

    • Parasite lipid composition significantly differs from erythrocytes, with higher levels of certain phospholipids, diacylglycerols, and fatty acids.
    • Plasmodium lacks de novo fatty acid and cholesterol synthesis but utilizes host-supplied precursors for lipid fabrication.
    • Parasite lipid metabolism influences erythrocyte membrane cholesterol and fatty acid content, affecting permeability and fragility.

    Conclusions:

    • Plasmodium exhibits distinct lipid requirements and metabolic capabilities, heavily relying on host erythrocyte lipids.
    • Alterations in erythrocyte membrane lipid composition by the parasite are linked to changes in membrane biophysical properties.
    • Understanding parasite lipid metabolism offers potential targets for antimalarial drug development.