A comparison between conventional liposome and drug-cyclodextrin complex in liposome system

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Nanotechnology

Background:

• Conventional liposomes are widely used for drug delivery.
• Risperidone is an antipsychotic medication.
• Drug-cyclodextrin complexes can enhance drug solubility and stability.

Purpose of the Study:

• To prepare and characterize a novel liposome system containing a drug-cyclodextrin complex.
• To compare this novel system with conventional risperidone-loaded liposomes.
• To evaluate the in vitro release characteristics and stability of both liposome types.

Main Methods:

• Liposome preparation using thin film hydration, reverse phase evaporation, and ethanol injection.
• Characterization using Differential Thermal Analysis (DTA), Transmission Electron Microscopy (TEM), light scattering, and ultrafiltration.
• In vitro drug release studies in pH 7.4 phosphate buffer.

Main Results:

• Drug-cyclodextrin complex liposomes exhibited lower encapsulation efficiency but larger particle size and enhanced stability compared to conventional liposomes.
• The novel liposomes showed a slower second-phase release after an initial burst release.
• Conventional liposomes demonstrated a more regular release profile.

Conclusions:

• The novel drug-cyclodextrin complex in liposome system offers improved stability and modified release characteristics.
• This formulation shows potential for development as a co-administration strategy with long-acting injectable risperidone.
• Further research is warranted to explore its therapeutic efficacy and safety.