Surface Reconfiguration of Binary Lipid Vesicles via Electrostatically Induced Nanoparticle Adsorption

Area of Science:

• Biophysics
• Materials Science
• Computational Chemistry

Background:

• Lipid bilayers are fundamental to cell membranes and drug delivery systems.
• Nanoparticle interactions with lipid structures are crucial for targeted delivery and biomaterial design.

Purpose of the Study:

• To investigate the adsorption of charged nanoparticles onto binary lipid vesicles.
• To understand the structural reorganization induced by nanoparticle adsorption.
• To explore the role of zwitterionic lipids in nanoparticle-vesicle interactions.

Main Methods:

• Implicit solvent coarse-grained modeling.
• Molecular dynamics simulations.
• Analysis of nanoparticle-lipid bilayer interactions and lipid reorganization.

Main Results:

• Nanoparticle adsorption induces significant structural reorganization of the lipid bilayer.
• Zwitterionic lipid reorganization is dependent on nanoparticle patch size and electrostatic interactions.
• Nanoparticle approach triggers clustering of zwitterionic lipids at the adsorption site.
• Zwitterionic lipid availability influences the adsorption dynamics of multiple nanoparticles.

Conclusions:

• Favorable electrostatic interactions between nanoparticles and zwitterionic lipids drive lipid reorganization and clustering.
• These findings provide insights for designing reconfigurable biomaterials for drug delivery, sensing, and imaging.