Abstract：
:A novel glucose-sensitive drug delivery system with controlled release of metronidazole was synthesized by using biocompatible photo-crosslinked chitosan hydrogel film. Specifically, methacrylic anhydride, as photosensitive substance, was firstly grafted on chitosan molecular chains and then UV irradiation was applied as the crosslinking method. Glucose sensitivity was endowed by immobilizing glucose oxidase on the surface of chitosan film. The physicochemical characteristics including chemical composition, crosslinking degree, mechanical strength and related enzyme properties were investigated successively. Cytotoxicity test, drug release and anti-bacterial test were carried out, respectively. The results show that this photo-crosslinked hydrogel film has good mechanical properties; meanwhile, the immobilized enzyme's bonding capacity and activity can maintain a relatively high level after surface activation. In addition, this material possesses better biocompatibility than chemical crosslinked samples. What's more, it can sense the ambient glucose stimulus, rapidly and correspondingly adjust its inner pore structure to control the loaded metronidazole release, lead to an improved antimicrobial activity against Porphyromonas gingivalis under high glucose concentration. This glucose sensitive hydrogel film may provide a promising method for diabetic's periodontitis therapy in clinic.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Liu J,Xiao Y,Wang X,Huang L,Chen Y,Bao Cdoi
10.1016/j.ijbiomac.2018.09.202subject
Has Abstractpub_date
2019-02-01 00:00:00pages
19-28eissn
0141-8130issn
1879-0003pii
S0141-8130(18)33728-0journal_volume
122pub_type
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