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Related Experiment Videos

Skin barrier structure and function: the single gel phase model.

L Norlén1

  • 1Department of Physics, University of Geneva, GAP-Biomedical, Geneva, Switzerland. lars.norlen@physics.unige.ch

The Journal of Investigative Dermatology
|October 26, 2001
PubMed
Summary
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The mammalian skin barrier functions as a single, coherent lamellar gel phase, not multiple phases. This new model explains skin

Area of Science:

  • Dermatology and Biophysics
  • Skin Barrier Function
  • Lipid Structure

Background:

  • The stratum corneum's intercellular lipid matrix is crucial for skin barrier function.
  • Previous models proposed multiple phases within the stratum corneum lipid structure.
  • Understanding this structure is key to explaining skin's barrier capacity.

Purpose of the Study:

  • To propose a new model for the mammalian skin barrier's structure and function.
  • To explain the skin barrier's properties based on its lipid organization.
  • To reconcile existing data with a unified theoretical framework.

Main Methods:

  • Theoretical modeling of intercellular lipid structure.
  • Analysis of lipid composition and chain length distributions.

Related Experiment Videos

  • Integration with existing biophysical data on stratum corneum.

    • Main Results:

    • The stratum corneum intercellular lipid exists as a single, coherent lamellar gel phase.
    • This structure is stabilized by specific lipid composition and chain lengths.
    • The model accounts for water permeability, lipid composition, hydration effects, and hydrocarbon chain packing.

    Conclusions:

    • The single gel phase model provides a unified explanation for skin barrier function.
    • It resolves discrepancies with previous multi-phase models.
    • This theoretical advancement enhances understanding of mammalian skin's barrier capacity.