Abstract
This study investigated a nanostructured lipid carrier (NLC)-gel system containing luteolin (LUT), a potential drug delivery system for the treatment of psoriasis. LUT-NLC was prepared by solvent emulsification ultrasonication method. The particle size was 199.9 ± 2.6 nm, with the encapsulation efficiency of 99.81% and drug loading of 4.06%. X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) were used to characterize the LUT-NLC. The NLC was dispersed in Carbomer 940 to form the NLC based gel. The rheological characteristics of LUT-NLC-gel showed an excellent shear-thinning behavior (non-Newtonian properties) and coincided with the Herschel-Bulkley model. LUT-NLC-gel (78.89 μg/cm2) exhibited better permeation properties and released over 36 hours than LUT gel (32.17 μg/cm2). The dye-labeled LUT-NLC presented intense fluorescence in the epidermis and dermis by the visualization of fluorescence and confocal microscopy, and it could accumulate in the hair follicles. The effect of LUT-NLC-gel on imiquimod-induced psoriasis mice was evaluated by psoriasis area severity index scoring, spleen index assay, histopathology, and inflammatory cytokines. These results confirmed that LUT-NLC-gel with high dose (80 mg/kg/day) remarkably reduced the level of inflammatory and proliferation factors such as TNF-α, IL-6, IL-17, and IL-23 in both skin lesions and blood. LUT-NLC-gel improved the macroscopic features. Therefore, the LUT-NLC-gel had great potential as an effective delivery system for skin diseases.
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Thanks Dr. Jinghan Li for the suggestion of the experiments.
Funding
This project is funded by Livelihood Plan Project of Department of Science and Technology of Liaoning Province (2021JH2/10300069, 2019-ZD-0845); Department of Education of Liaoning Province (LJKZ0918); and National College Students' innovation and entrepreneurship training program (202210163013).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Hongjia Xu, Hao Hu and Mengyuan Zhao. Caihong Shi was supervised in the study. The first draft of the manuscript was written by Hongjia Xu and all authors commented on previous versions of the manuscript. Xiangrong Zhang wrote, reviewed and edited the study. All authors read and approved the final manuscript.
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Xu, H., Hu, H., Zhao, M. et al. Preparation of luteolin loaded nanostructured lipid carrier based gel and effect on psoriasis of mice. Drug Deliv. and Transl. Res. 14, 637–654 (2024). https://doi.org/10.1007/s13346-023-01418-4
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DOI: https://doi.org/10.1007/s13346-023-01418-4