Selective modification of skin barrier lipids

Area of Science:

• Dermatology
• Biophysics
• Materials Science

Background:

• Stratum corneum (SC) lipid organization is crucial for skin barrier integrity.
• A small fraction of SC lipids exist in a fluid state, potentially influencing barrier properties.
• Previous research suggested acetone (Ac) preferentially solubilizes these fluid lipids.

Purpose of the Study:

• To investigate the in-depth effects of acetone on skin barrier lipids.
• To elucidate the specific roles of different lipid components in skin structure and function.
• To assess how selective lipid modification impacts skin barrier properties.

Main Methods:

• Synchrotron-based Fourier-transform infrared microspectroscopy (FTIR) to analyze SC lipid organization.
• In vitro Franz cell experiments to evaluate skin permeability.
• In vitro transepidermal water loss (TEWL) measurements.

Main Results:

• Acetone treatment led to a more ordered lipid organization within the SC.
• Ac-treated skin showed reduced penetration of caffeine and ibuprofen.
• TEWL measurements indicated that Ac-treated skin exhibited decreased water permeability.
• Despite lipid removal, remaining lipids contributed to enhanced barrier function.

Conclusions:

• Acetone treatment induces a more ordered SC lipid structure, improving the skin's barrier function.
• The remaining lipid components play a significant role in maintaining barrier integrity after acetone exposure.
• Understanding these lipid dynamics can inform strategies for modulating skin barrier properties.