Stratum corneum lipid matrix with unusual packing: A molecular dynamics study

Area of Science:

• Biophysics
• Computational Chemistry
• Dermatology

Background:

• The skin's stratum corneum acts as a barrier, primarily due to its lipid matrix.
• Understanding this barrier is crucial for effective transdermal drug delivery.
• Reliable computational models of skin components are needed.

Purpose of the Study:

• To develop coarse-grained molecular dynamics models of the stratum corneum lipid matrix and sebum.
• To investigate the stability of an unusual lipid packing configuration in the stratum corneum.
• To assess the role of sebum in transdermal delivery.

Main Methods:

• Coarse-grained molecular dynamics simulations.
• Development of models for stratum corneum lipid matrix.
• Development of models for skin sebum.

Main Results:

• The developed lipid matrix model with an unusual packing configuration is stable.
• This configuration may explain the low permeability of the stratum corneum.
• Simulations indicate sebum can significantly influence transdermal drug delivery.

Conclusions:

• Stable computational models of the stratum corneum lipid matrix and sebum have been successfully developed.
• The findings provide insights into skin barrier function and its implications for drug delivery.
• These models can advance research in transdermal therapies.