Preparation and characterization of β-elemene-loaded microemulsion.

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Nanotechnology

Background:

• Beta-elemene is a promising anti-cancer compound.
• Developing stable and injectable formulations is crucial for effective beta-elemene delivery.
• Microemulsions offer advantages for encapsulating lipophilic drugs like beta-elemene.

Purpose of the Study:

• To prepare and characterize an intravenously injectable microemulsion of beta-elemene.
• To optimize the microemulsion formulation for enhanced stability and drug loading.
• To evaluate the in vitro release profile of beta-elemene from the optimized microemulsion.

Main Methods:

• Microemulsions were prepared using a water titration method.
• Pseudoternary phase diagrams were utilized for formulation optimization.
• Characterization included loading capacity, dilutability, electron microscopy, conductivity, and viscosity measurements.
• In vitro release studies were performed to determine the release kinetics.

Main Results:

• Intact, spherical microemulsion droplets were observed via transmission electron microscopy.
• Conductivity and viscosity measurements elucidated the phase behavior of the formulations.
• The optimized microemulsion exhibited steady beta-elemene release over 12 hours.
• The release kinetics best fitted a first-order model.

Conclusions:

• A stable, injectable beta-elemene microemulsion was successfully developed.
• The formulation demonstrates controlled and sustained drug release.
• This microemulsion holds potential for improved intravenous beta-elemene therapy.