Electroformation of giant vesicles from an inverse phase precursor

Area of Science:

• Biophysics
• Materials Science
• Biochemistry

Background:

• Giant vesicle electroformation is a standard technique for creating artificial cell membranes.
• Incorporating water-soluble molecules into phospholipid bilayers presents challenges.
• Chitosan is a biocompatible polysaccharide with emerging pharmacological applications.

Purpose of the Study:

• To present a modified giant vesicle electroformation method for direct incorporation of water-soluble species.
• To demonstrate the successful decoration of phospholipid vesicles with chitosan.
• To investigate the binding characteristics of chitosan to phospholipid membranes.

Main Methods:

• Modification of the standard giant vesicle electroformation technique.
• Preparation of phospholipid vesicles.
• Decoration of vesicles with chitosan, a water-soluble polysaccharide.
• Analysis of chitosan binding to the vesicle membrane.

Main Results:

• The modified method allows direct addition of water-soluble species during vesicle formation.
• Phospholipid vesicles were successfully decorated with chitosan.
• Chitosan was found to be tightly bound to the membrane, not merely encapsulated.
• The primary amino groups on chitosan facilitate strong membrane interaction.

Conclusions:

• The modified electroformation technique offers a straightforward approach for functionalizing phospholipid vesicles with water-soluble molecules.
• This method enables robust attachment of chitosan to vesicle membranes, enhancing their potential for drug delivery and other biomedical applications.
• The findings open avenues for developing novel chitosan-based biomaterials and drug delivery systems.