Interaction of drug-carrier systems with targets--a study using atomic force microscopy

Area of Science:

• Nanomedicine
• Biophysics
• Materials Science

Background:

• Understanding drug-carrier interactions with biological membranes is vital for effective drug delivery.
• Current analytical methods lack detailed insights into these complex interactions at the membrane level.
• Gaps in knowledge hinder the development of advanced drug absorption and distribution models.

Purpose of the Study:

• To investigate drug-carrier interactions with biological membranes using atomic force microscopy (AFM).
• To analyze membrane topography, structural changes, and stability under various conditions.
• To provide insights for future modeling of drug delivery systems.

Main Methods:

• Utilized atomic force microscopy (AFM) under physiological conditions (normal temperatures, liquid surroundings).
• Studied membrane topography in different mixtures (liquid, gel-phase).
• Examined membrane structural changes induced by peptide solutions and stability against surfactants and lipid nanoparticles.

Main Results:

• AFM provided real-time insights into system-membrane interactions.
• Observed membrane structural changes during destruction by peptide solutions.
• Assessed membrane stability when exposed to increasing surfactant concentrations and lipid nanoparticles.
• Characterized the geometry of solid lipid nanoparticles and nanostructured lipid carriers.

Conclusions:

• Atomic force microscopy is a powerful tool for studying drug-membrane interactions in situ.
• This method offers a deeper understanding of drug absorption and distribution mechanisms.
• The findings facilitate the development of predictive models for drug delivery systems.