期刊
PHARMACEUTICS
卷 13, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/pharmaceutics13091386
关键词
nanostructured lipid carrier; protein drug delivery; sustained release; chronic wound healing; angiogenesis factor; carbopol gel; thrombomodulin
资金
- Ministry of Science and Technology, Taiwan [MOST 109-2635-B-006-001, MOST 109-2314-B-309-002, MOST 110-2314-B-309-001]
- Headquarters of University Advancement
- Ministry of Education, Taiwan, R.O.C. [D107-F2518, D108-F2506]
The study developed NLC formulations containing rhTM, which effectively promoted chronic wound healing with high encapsulation efficiency and sustained release. In diabetic mouse models, it showed significant improvement in wound healing and cell migration, with lower plasma concentrations compared to rhTM solution.
Recombinant human thrombomodulin (rhTM), an angiogenesis factor, has been demonstrated to stimulate cell proliferation, keratinocyte migration and wound healing. The objective of this study was to develop nanostructured lipid carrier (NLC) formulations encapsulating rhTM for promoting chronic wound healing. RhTM-loaded NLCs were prepared and characterized. Encapsulation efficiency was more than 92%. The rate of rhTM release from different NLC formulations was influenced by their lipid compositions and was sustained for more than 72 h. Studies on diabetic mouse wound model suggested that rhTM-NLC 1.2 mu g accelerated wound healing and was similar to recombinant human epidermal growth factor-NLC (rhEGF-NLC) 20 mu g. By incorporating 0.085% carbopol (a highly crosslinked polyacrylic acid polymer) into rhTM NLC, the NLC-gel presented similar particle characteristics, and demonstrated physical stability, sustained release property and stability within 12 weeks. Both rhTM NLC and rhTM NLC-gel improved wound healing of diabetic mice and cell migration of human epidermal keratinocyte cell line (HaCaT) significantly. In comparison with rhTM solution, plasma concentrations of rhTM post applications of NLC and NLC-gel formulations were lower and more sustained in 24 h. The developed rhTM NLC and rhTM NLC-gel formulations are easy to prepare, stable and convenient to apply to the wound with reduced systemic exposure, which may warrant potential delivery systems for the care of chronic wound patients.
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