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Related Experiment Videos

Tension-induced morphological transition in mixed lipid bilayers.

S Komura1, N Shimokawa, D Andelman

  • 1Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan. komura@comp.metro-u.ac.jp

Langmuir : the ACS Journal of Surfaces and Colloids
|July 26, 2006
PubMed
Summary

This study explains how lipid bilayer morphology transitions from striped to hexagonal phases. Enhanced membrane surface tension from vesicle adhesion to surfaces drives this change.

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Area of Science:

  • Biochemistry
  • Materials Science
  • Physical Chemistry

Background:

  • Lipid bilayers are fundamental to cell membranes.
  • Cholesterol plays a crucial role in modulating membrane properties.
  • Understanding lipid superstructure formation is key to membrane biophysics.

Purpose of the Study:

  • To investigate the morphological transitions in three-component lipid bilayers.
  • To explain the observed striped-to-hexagonal phase transition.
  • To link vesicle adhesion to membrane surface tension and superstructure dynamics.

Main Methods:

  • Analysis of morphological and dynamic data from three-component lipid bilayers.
  • Theoretical explanation of phase transitions based on surface tension.

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  • Consideration of vesicle adhesion to solid surfaces.

    • Main Results:

    • A sequence of morphological transitions, from striped to hexagonal, was observed.
    • Enhanced membrane surface tension was identified as a key factor.
    • Vesicle adhesion to a solid surface was proposed as the cause of increased surface tension.

    Conclusions:

    • The striped-to-hexagonal morphological transition in mixed lipid bilayers is driven by enhanced membrane surface tension.
    • Vesicle adhesion to solid surfaces induces this increased surface tension.
    • This provides a mechanistic explanation for superstructure dynamics in complex lipid systems.