Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 132, Issue 3, Pages 1557-1566Publisher
SPRINGER
DOI: 10.1007/s10973-018-7072-7
Keywords
Lipid nanoparticles; Beeswax; Stearic acid; Tacrolimus; Atopic dermatitis
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, Brazil)
- Centro Multiusuario de Nanotecnologia da UFS (CMNano-UFS, Brazil)
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Lipid nanoparticles, both solid lipid nanoparticles and nanostructured lipid carriers (NLC), containing tacrolimus (FK) were obtained by solvent diffusion method associated with ultrasonication using stearic acid (SA) or beeswax as solid lipid. The oleic acid was used as liquid lipid in the NLC. Lipid nanoparticles were characterized by determining the drug loading, particle size, polydispersity index (PDI) and zeta potential (ZP). Analysis by differential scanning calorimetry and X-ray diffraction were performed. Lipid nanoparticles presented nano-sized from 139 to 275 nm. The PDI results show the particles present from 0.3 to 0.5, and ZP was higher than |25| mV. Drug loading ranged of 2.3-3.2%. SA nanoparticles presented better ZP, average size and distribution. However, beeswax nanoparticles showed higher drug loading. Results suggest there are no incompatibilities between FK and the raw materials. Polymorphic modifications were not observed. The results presented show that lipid nanoparticles using both lipids were successfully obtained and may represent promising delivery system of FK in topical formulations.
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