Manufacturing process of liposomal Formation: A coarse-grained molecular dynamics simulation

Area of Science:

• Biophysics
• Materials Science
• Computational Chemistry

Background:

• Liposomes are crucial drug delivery vehicles.
• Continuous manufacturing offers scalable liposome production.
• Understanding molecular self-assembly is key to controlling liposome properties.

Purpose of the Study:

• To investigate the effects of ethanol concentration and temperature on liposome self-assembly using molecular dynamics simulations.
• To elucidate the molecular-level mechanisms governing liposome formation and stability.
• To provide structural details not attainable through experimental methods alone.

Main Methods:

• Coarse-grained molecular dynamics (CG-MD) simulations were employed.
• Simulations focused on liposomes composed of DPPC, DPPG, and cholesterol.
• Structural properties like area per lipid and diffusion coefficients were analyzed.

Main Results:

• Higher ethanol concentrations resulted in thicker liposomal bilayers.
• Elevated temperatures led to thinner bilayers and increased water penetration.
• Lower ethanol concentrations and/or temperatures promoted stable liposome formation.
• CG-MD model was validated against experimental and computational data.

Conclusions:

• Ethanol concentration and temperature are critical parameters influencing liposome self-assembly and stability.
• CG-MD simulations provide unprecedented molecular-level insights into liposome formation.
• This study offers a foundation for optimizing continuous liposome manufacturing processes.