Phase-field model of bilipid membrane electroporation

Area of Science:

• Biophysics
• Computational Biology
• Membrane Science

Background:

• Electroporation models traditionally rely on geometric assumptions, limiting their applicability.
• Existing models often do not fully integrate membrane water content and transmembrane voltage.
• Generalizing seminal work requires overcoming geometrical constraints.

Purpose of the Study:

• To propose a novel model for membrane electropermeabilization.
• To generalize existing electroporation models by removing the cylindrical geometry assumption.
• To bridge the gap between molecular dynamics simulations and experimental observations.

Main Methods:

• Developed a new model combining membrane water content and transmembrane voltage.
• Utilized a free-energy approach to generalize existing models.
• Employed accurate splitting schemes and Fast Fourier Transforms for efficient computation.
• Analyzed nonlocal operators in spherical and flat membrane configurations.

Main Results:

• The model generalizes seminal approaches by removing geometrical constraints.
• A surface diffusion equation for the lipid phase is recovered.
• Comparison of time constants in spherical and flat membranes is achieved.
• Numerical results link molecular dynamics to experimental data.

Conclusions:

• The proposed model offers a physically relevant framework for electropermeabilization.
• It provides a generalized approach applicable beyond cylindrical assumptions.
• The model facilitates the integration of computational and experimental findings in membrane science.