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Transformation pathways of liposomes.

H Hotani

    Journal of Molecular Biology
    |September 5, 1984
    PubMed
    Summary

    Liposomes transform through defined pathways driven by osmotic pressure, forming filaments or spheres. This lipid vesicle transformation is reversible and observed in biological structures like red blood cells.

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    Proceedings of the National Academy of Sciences of the United States of America·2001

    Area of Science:

    • Biophysics
    • Materials Science
    • Cell Biology

    Background:

    • Liposomes are crucial vesicular structures in biological systems.
    • Understanding lipid behavior is key to morphogenesis of vesicles.
    • Previous studies have explored liposome stability but not transformation pathways.

    Purpose of the Study:

    • To investigate the role of lipids in the morphogenesis of biological vesicular structures.
    • To elucidate the transformation pathways of liposomes.
    • To determine the driving forces behind these transformations.

    Main Methods:

    • Dark-field light microscopy was used to observe liposome transformations.
    • Liposomes were subjected to varying osmotic pressures.
    • Trypsinized red blood cell ghosts were used for comparative studies.

    Main Results:

    • Liposomes exhibit sequential transformations via distinct, well-defined pathways.
    • Initial circular biconcave liposomes form filaments or spheres through geometrically symmetrical intermediates.
    • Transformation is reversible to a certain extent, with osmotic pressure identified as the primary driver.
    • Similar transformation pathways were observed in biological vesicles like red cell ghosts.

    Conclusions:

    • Lipid composition dictates specific, predictable transformation pathways in vesicular structures.
    • Osmotic pressure is a fundamental force governing vesicle morphogenesis.
    • Liposome transformation pathways offer insights into biological membrane dynamics and evolution.

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