Novel sulpiride-loaded solid lipid nanoparticles with enhanced intestinal permeability

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Nanotechnology

Background:

• Solid lipid nanoparticles (SLN) are advanced drug carriers for improving the absorption of poorly soluble drugs.
• Sulpiride, an antipsychotic, exhibits poor oral absorption due to low intestinal permeability.

Purpose of the Study:

• To enhance the intestinal permeability and oral absorption of sulpiride by encapsulating it within SLN.
• To develop and characterize sulpiride-loaded SLN using a novel ultrasonic melt-emulsification technique.

Main Methods:

• SLN were prepared using an ultrasonic melt-emulsification method with optimized drug-to-lipid ratios and surfactant types.
• Characterization included particle size, shape, surface charge, entrapment efficiency, and drug release studies.
• In vitro intestinal permeability was assessed using a rat everted sac model.

Main Results:

• SLN with uniform spherical morphology and sizes ranging from 147.8-298.8 nm were successfully prepared.
• Optimized formulations exhibited high zeta potential, entrapment efficiency, and drug loading capacity.
• Sulpiride-loaded SLN demonstrated significantly enhanced intestinal permeability compared to the free drug.

Conclusions:

• Encapsulation of sulpiride in SLN significantly improves its intestinal permeability, potentially increasing oral bioavailability.
• The developed SLN possess desirable characteristics like particle size uniformity and high drug loading.
• The simple and efficient ultrasonic method offers a novel approach for SLN preparation.