Liposomal membrane permeability assessment by fluorescence techniques: Main permeabilizing agents, applications and...

Area of Science:

• Biophysical Chemistry
• Membrane Biology
• Drug Delivery Systems

Background:

• Liposomes, versatile lipid vesicles, serve as critical models for studying membrane biophysics.
• Liposome membrane permeability is a fundamental property influencing their stability and function.
• Assessing membrane permeability is essential for understanding liposome behavior in various applications.

Purpose of the Study:

• To review and detail diverse techniques for assessing liposome membrane permeability.
• To present membrane-active agents that induce liposome permeabilization and their mechanisms.
• To highlight factors affecting liposome membrane permeability for optimized formulation.

Main Methods:

• Fluorescence-based techniques are central, including vesicle leakage assays with self-quenching probes.
• Dye/quencher and cation/ligand pairs are utilized for sensitive permeability measurements.
• Mechanisms of membrane-active agents and modulating factors are discussed.

Main Results:

• Various fluorescence methods provide quantitative assessment of liposome membrane permeability.
• Specific agents and environmental factors significantly alter membrane integrity.
• Understanding these influences is key to controlling liposome behavior.

Conclusions:

• Effective assessment of liposome membrane permeability relies on appropriate technique selection.
• Knowledge of permeabilization agents and modulating factors is crucial for liposome design.
• Tailored liposome formulation ensures suitability for specific research aims and applications.