Formulation and Characterization of Bioactive Agent Containing Nanodisks

Area of Science:

• Biotechnology
• Nanotechnology
• Drug Delivery

Background:

• Nanodisks are discrete nanoparticles composed of lipids, scaffold proteins, and bioactive agents.
• They are disk-shaped, with a lipid bilayer enclosed by a scaffold protein, typically an apolipoprotein.
• Hydrophobic drugs can be integrated into the lipid bilayer, forming homogeneous particles of 10-20 nm.

Purpose of the Study:

• To describe a general methodology for formulating and characterizing nanodisks.
• To demonstrate the formulation of nanodisks containing the hydrophobic antibiotic amphotericin B.
• To highlight the potential of nanodisk technology for drug delivery applications.

Main Methods:

• Formulation involves precise component ratios, sequential addition, and bath sonication.
• Scaffold proteins spontaneously organize lipids and drugs into homogeneous nanodisks.
• Characterization includes solubilization efficiency, electron microscopy, spectroscopy, and biological activity assays.

Main Results:

• The formulation process transitions the mixture from turbid to clear, yielding a stable nanodisk population.
• Nanodisks effectively solubilize hydrophobic agents like amphotericin B.
• Characterization confirmed particle homogeneity and size (10-20 nm).

Conclusions:

• Nanodisk technology offers a versatile platform for formulating hydrophobic drugs.
• The described methodology facilitates the creation of stable, aqueous-soluble nanodisks.
• Nanodisks have broad potential for in vitro and in vivo applications, particularly in drug delivery.