The objective of the present study was to investigate the effect of partially hydrolyzed ginsenoside on the physicochemical properties and in vitro release of curcumin from phospholipid-based nanostructured lipid carrier (NLC). NLC formulas modified with partially hydrolyzed ginsenoside (NLC-PG) were prepared with different amounts of ginsenoside using the conventional hot-melt method. The average particle size of curcumin-loaded NLC-PG ranged from 150 to 200 nm, and polydispersity index was in the range of 0.101–0.177, indicating monodispersed particle size distribution. Optical microscopy showed no sedimentation or recrystallization of curcumin even at 10,000 μg/ml concentration as NLC-PG in distilled water, indicating significantly enhanced solubility. TEM image showed that the nanoparticles were monodispersed with a multilayered core/shell structure. X-ray diffraction and FTIR spectroscopy showed that curcumin was amorphous in the NLC-PG, and there was no interaction between curcumin and the excipients. In vitro release study using simulated gastric/intestinal fluid media revealed that the release rate (Jss) of curcumin from the NLC-PG increased as a function of the ginsenoside content in the lipid carrier. Moreover, the Jss of curcumin kept gradually increasing in the presence of lipase, whereas in the presence of viscozyme, it sharply increased until the ginsenoside content reached 9.09% and subsequently plateaued. Partially hydrolyzed ginsenoside increased the Jss of curcumin from curcumin-loaded NLC-PG and therefore may be useful for improving the bioavailability of curcumin.
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The authors would like to thank Ms. Sun Kyung Choi for her assistance with the in vitro release experiments and manuscript documentations.
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Selvaraj, K., Yoo, B. Curcumin-Loaded Nanostructured Lipid Carrier Modified with Partially Hydrolyzed Ginsenoside. AAPS PharmSciTech 20, 252 (2019). https://doi.org/10.1208/s12249-019-1467-z
- nanostructured lipid carrier
- partially hydrolyzed ginsenoside
- in vitro release