Iemsam-Arng J, Ketchart O, Rattana-Amron T, Wutikhun T, Tapaneeyakorn S. Modified NLC-loaded coumarin for pharmaceutical applications: the improvement of physical stability and controlled release profile.
Pharm Dev Technol 2015;
21:1015-1022. [PMID:
26401882 DOI:
10.3109/10837450.2015.1089897]
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Abstract
BACKGROUND
Coumarin-6 is a lipophilic dye and is often used as a model in delivery system.
OBJECTIVE
The aim of this study was to improve the nonstructured lipid carrier (NLC) system loading with lipophilic molecule, coumarin-6, and to investigate its characteristics in terms of physical stability and controlled release profile.
MATERIALS AND METHODS
Initially, the selection of the coating polymer was observed. Then, the preparation of the conventional NLC-loaded coumarin-6 was compared to the modified NLC-loaded coumarin-6 via the probe sonication. The physical properties and stability were determined by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) techniques. The release profile was established using fluorescent spectroscopic method.
RESULTS AND DISCUSSION
The size and zeta potential measurement showed significant decrease in the size range of the modified NLC-loaded coumarin and the lower intensity of the surface charge compared to the NLC-loaded coumarin. The change of crystallinity observed from DSC and XRD techniques indicated the molecular dispersion of coumarin-6 in the lipid matrix of NLC. The FT-IR spectra were also proven that coumarin-6 was entrapped in the NLC molecule. The result showed comparable controlled release profile to the conventional preparation with no difference on the cytotoxicity level.
CONCLUSIONS
The modified NLC delivery system, therefore, exhibited the acceptable potential as a nanocarrier.
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