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Membrane skeleton detachment in spherical and cylindrical microexovesicles.

H Hägerstrand1, V Kralj-Iglic, M Bobrowska-Hägerstrand

  • 1Department of Biology, Abo Akademi University, FIN-20520, Abo/Turku, Finland.

Bulletin of Mathematical Biology
|September 21, 2007
PubMed
Summary
This summary is machine-generated.

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Amphiphile addition creates spherical or cylindrical microexovesicles. Both vesicle types show depleted membrane skeletons, suggesting detachment during budding.

Area of Science:

  • Cell biology
  • Biophysics
  • Membrane biophysics

Background:

  • Membrane vesicles (microexovesicles) are crucial for cellular processes.
  • Their formation mechanism, particularly shape determination and protein composition, requires further elucidation.
  • Amphiphile interactions with cell membranes offer a model for studying vesicle dynamics.

Purpose of the Study:

  • To investigate the influence of amphiphile species on microexovesicle morphology (shape).
  • To analyze the protein composition of different microexovesicle types.
  • To understand the role of the membrane skeleton in amphiphile-induced microexovesicle formation.

Main Methods:

  • Induction of microexovesicles using various amphiphiles.
  • Morphological characterization of microexovesicles (spherical vs. cylindrical).

Related Experiment Videos

  • Proteomic analysis of isolated microexovesicles, focusing on membrane skeleton proteins.

    • Main Results:

    • Amphiphile type dictates microexovesicle shape: spherical or cylindrical.
    • Spherical vesicles result from extreme local area differences in a fixed membrane area.
    • Cylindrical vesicles arise from increased budding segment area due to anisotropic constituents.
    • Both vesicle types exhibit significant depletion of membrane skeleton proteins.

    Conclusions:

    • Microexovesicle shape is tunable by amphiphile properties.
    • Membrane skeleton detachment in the budding region is likely driven by shear deformations.
    • This detachment facilitates the formation of both spherical and cylindrical microexovesicles.