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Formulation and characterization of curcuminoids loaded solid lipid nanoparticles.

Waree Tiyaboonchai1, Watcharaphorn Tungpradit, Pinyupa Plianbangchang

  • 1Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Naresuan University, Pitsanulok 65000, Thailand. wareet@nu.ac.th

International Journal of Pharmaceutics
|February 9, 2007
PubMed
Summary

Solid lipid nanoparticles (SLNs) effectively encapsulate curcuminoids, achieving high loading and sustained release. These curcuminoid-loaded SLNs demonstrate excellent physical and chemical stability for at least six months.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Pharmaceutical Sciences

Background:

  • Curcuminoids possess therapeutic potential but suffer from poor bioavailability.
  • Solid lipid nanoparticles (SLNs) offer a promising delivery system for lipophilic compounds.
  • Developing stable and effective curcuminoid-loaded SLNs is crucial for therapeutic applications.

Purpose of the Study:

  • To develop and characterize curcuminoids loaded solid lipid nanoparticles (SLNs) using a microemulsion technique.
  • To evaluate the loading capacity, particle size, and in vitro release profile of the developed SLNs.
  • To assess the physical and chemical stability of curcuminoids loaded SLNs over a 6-month storage period.

Main Methods:

  • Microemulsion technique employed for SLN preparation at ~75°C.
  • Characterization included particle size analysis, polydispersity index, and curcuminoid loading capacity determination.
  • In vitro release studies conducted following Higuchi's square root model.
  • Stability assessment involved storage at room temperature and analysis of physical (particle size) and chemical (curcuminoid content) properties.

Main Results:

  • Optimized SLNs exhibited spherical morphology with a mean particle size of ~450nm and a polydispersity index of 0.4.
  • High curcuminoid incorporation efficacy of up to 70% (w/w) was achieved.
  • Prolonged in vitro release of curcuminoids from SLNs observed up to 12 hours.
  • Lyophilized SLNs demonstrated excellent physical and chemical stability over 6 months, with no significant changes in particle size or curcuminoid content.
  • Curcuminoids dispersed in a model cream base retained high percentages (88-96%) after 6 months of storage.

Conclusions:

  • Curcuminoids loaded SLNs can be successfully prepared via microemulsion technique, offering high loading capacity and prolonged release.
  • The developed lyophilized SLNs exhibit robust physical and chemical stability, making them suitable for pharmaceutical formulations.
  • These findings highlight the potential of SLNs as an effective delivery system to enhance the stability and therapeutic efficacy of curcuminoids.