期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 193, 期 -, 页码 1043-1049出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.11.088
关键词
Carboxymethyl chitosan; Hyaluronate; Microgel
资金
- National Natural Science Foundation of China [21978114, 81900560]
- Natural Science Foundation of Jiangsu Province [BK20180294]
The microgel prepared with a precipitation method provides a porous and swollen microstructure for pulmonary delivery system with sustained release properties. It exhibits pH-sensitive behavior, high safety, and biocompatibility in vitro, with the ability to escape macrophage phagocytosis and achieve sustained drug release in the lung.
Microgel affords a porous and swollen microstructure for the establishment of pulmonary delivery system with sustained released properties. Here, we report a microgel (with the diameter around 4 mu m) prepared with a precipitation method, synthesized by coordinating Zn2+ to the Schiff base cross-linked carboxymethyl chitosan and glycol split hyaluronate. The microgel has shown well swollen and pH sensitive behaviors, high safety and biocompatibility in vitro. Besides, the biomaterial could escape from macrophage phagocytosis, a key factor contribute to quick drug clearance in the lung after co-incubated with RAW 264.7 cells. In consist with this, the bovine serum albumin loaded in the microgel showed sustained release behavior in 24 h in vitro; meanwhile, the drug had a retention time up to 36 h in the lung and followed by clearance in ICR mice through pulmonary administration. Thus, our microgel platform provides a promising candidate for pulmonary drug delivery systems with controlled release rate.
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