Liposome solubilization induced by surfactant molecules in a microchip

Area of Science:

• Biochemistry
• Materials Science
• Chemical Engineering

Background:

• Liposomes are crucial drug delivery vehicles.
• Understanding liposome solubilization is key for formulation stability and drug release.
• Current methods lack real-time observation of these dynamic processes.

Purpose of the Study:

• To investigate the real-time dynamics of liposome solubilization.
• To propose a mechanistic pathway for liposome collapse induced by surfactants.
• To utilize microfluidic technology for observing these complex interactions.

Main Methods:

• Dynamic Light Scattering (DLS) for size analysis.
• Optical Microscopy for visual observation.
• A custom-designed Y-shape microfluidic chip for controlled mixing and observation.

Main Results:

• Real-time monitoring of liposome solubilization was achieved.
• Observed liposomes deform, become spherical, and increase in size.
• A threshold surfactant/liposome ratio was identified preceding liposome collapse.
• Mixed micelles of surfactants and phospholipids were released, leading to liposome disintegration.

Conclusions:

• The study elucidated a three-stage dynamic process of liposome solubilization.
• Microfluidic devices enable unprecedented real-time observation of liposome-surfactant interactions.
• Findings provide insights into liposome stability and degradation mechanisms.