An approach for liposome immobilization using sterically stabilized micelles (SSMs) as a precursor for bio-layer...

Area of Science:

• Biophysical Chemistry
• Biosensor Technology
• Lipid Nanotechnology

Background:

• Non-fluidic bio-layer interferometry (BLI) is a key technology for label-free, real-time biomolecular interaction analysis.
• High-throughput screening of liposome interactions necessitates efficient liposome immobilization techniques.

Purpose of the Study:

• To develop and validate a novel method for immobilizing liposomes on biosensor surfaces for interaction studies.
• To demonstrate the utility of this method for kinetic and affinity measurements using a model protein.

Main Methods:

• Liposome immobilization via restructured sterically stabilized micelles (SSMs) containing DSPE-PEG(2000)-biotin.
• Utilizing bio-layer interferometry (BLI) for real-time interaction monitoring.
• Confocal fluorescence microscopy to confirm liposome integrity and surface characterization.

Main Results:

• Successful immobilization of liposomes with varying composition and fluidity.
• Demonstrated binding of Cytochrome C to immobilized liposomes with literature-consistent kinetic and affinity constants.
• Confocal microscopy confirmed the integrity of immobilized liposomes.

Conclusions:

• The developed liposome immobilization method is simple, reproducible, and automatable.
• This approach is suitable for high-throughput liposome interaction studies in basic research and industrial applications.
• The method ensures liposome integrity, providing reliable data for kinetic and affinity analysis.