Sustained release Curcumin loaded Solid Lipid Nanoparticles

Area of Science:

• Nanotechnology
• Pharmaceutical Sciences
• Materials Science

Background:

• Curcumin exhibits poor water solubility and low bioavailability, limiting its therapeutic applications.
• Lipid-based drug delivery systems, such as Solid Lipid Nanoparticles (SLNs), can enhance the solubility and bioavailability of lipophilic drugs.
• Curcumin possesses significant antibacterial properties that could be leveraged with improved delivery systems.

Purpose of the Study:

• To prepare curcumin-loaded Solid Lipid Nanoparticles (SLNs) with high loading efficiency and small particle size.
• To achieve a prolonged release profile for curcumin from the SLNs.
• To enhance the antibacterial efficacy of curcumin through SLN formulation.

Main Methods:

• Solid Lipid Nanoparticles (SLNs) were synthesized using a high-pressure homogenization method.
• Freeze-drying with mannitol as a cryoprotectant was employed to ensure SLN stability.
• Cholesterol was utilized as a carrier for its biocompatibility and tolerability.

Main Results:

• Optimized SLNs exhibited particle sizes of 112 nm (before freeze-drying) and 163 nm (after freeze-drying).
• The formulation achieved a high loading efficiency of 71% for curcumin.
• Sustained release of 90% curcumin over 48 hours was observed, with SEM confirming spherical SLN morphology.
• DSC studies indicated hydrogen bond formation between cholesterol and curcumin, contributing to prolonged release and enhanced antibacterial activity due to increased bacterial permeability.

Conclusions:

• The developed curcumin-loaded SLNs are promising candidates for various dosage forms.
• These SLNs offer potential for cosmeceutical applications due to enhanced curcumin delivery.
• The formulation strategy successfully improved curcumin's solubility, bioavailability, and antibacterial efficacy.