期刊
INTERNATIONAL JOURNAL OF PHARMACEUTICS
卷 606, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ijpharm.2021.120938
关键词
Drug delivery; DNA hydrogel; Chitosan; Electrostatic interaction; Macrophage polarization; Dexamethasone
资金
- National Natural Science Foundation of China [81530051, 31800790, 32071324]
- Young Talent fund of University Association for Science and Technology in Shaanxi, China [20190304]
A new injectable DNA hydrogel was synthesized through heat-cool treatments and chitosan cross-linkage, showing excellent biocompatibility and drug delivery properties.
The injectable hydrogel is an ideal reservoir for drug delivery. In this study, a new injectable DNA hydrogel was fabricated. Firstly, the DNA pre-gel was obtained by heat-cool treatments to induce cross-linkage through baseparing. Then, the pre-gel was cross-linked with chitosan (CS) through electrostatic interaction, which was confirmed by ATR-FTIR and XPS analysis. The DNA-CS hybrid gel showed finely tunable various properties such as porosity and viscosity. To simulate the biomedical application, the dexamethasone (Dex) was loaded into the gel and coated onto titanium implant surface to induce macrophages M2 polarization. Due to the excellent biocompatibility and Dex delivery, the decorated implant surface was favorable for RAW264.7 cells growth and showed powerful effects of inducing M2 polarization both in vitro and in vivo. In conclusion, it is the first report of DNA hydrogel synthesis via CS cross-linkage and the injectable DNA-CS hybrid gel was superb for therapeutic delivery.
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