Injectable and self-healing polysaccharide-based hydrogel for pH-responsive drug release.
Injectable hydrogels with self-healing and pH-responsive property are appealing for biomedical applications. Herein, we developed a facile and green method to prepare a multifunctional polysaccharide-based hydrogel as a new carrier of drug. The hydrogels were prepared by forming reversible chemical bond between carboxyethyl-modified chitosan (CEC) and aldehyde modified hyaluronic acid (A-HA). The morphology and rheological property of the hydrogels with different solid content were systematically characterized. Owing to the dynamic equilibrium of the Schiff base bonds between amine groups on CEC and aldehyde groups on A-HA, the rapid self-healing performance of hydrogels was confirmed through qualitative and quantitative methods without any external stimulus. The pH-responsive behaviour was demonstrated by equilibrium swelling and in vitro Doxorubicin (Dox) release in PBS medium with various pH. In acidic condition, Dox can be release more rapidly compared with weak alkaline medium. Furthermore, the kill effect of Dox released from hydrogels for cancer cells was investigated. In vitro degradation and cytotoxicity examinations showed that the hydrogel is biodegradable and biocompatible. Therefore, such polysaccharide-based injectable self-healing and pH-responsive hydrogel is a promising candidate as drug delivery carrier.
['Qian|Chao|C|', 'Zhang|Tingbin|T|', 'Gravesande|Joel|J|', 'Baysah|Charles|C|', 'Song|Xiaoyan|X|', 'Xing|Jinfeng|J|']
D045744:Cell Line, Tumor D048271:Chitosan D004317:Doxorubicin D004337:Drug Carriers D016503:Drug Delivery Systems D065546:Drug Liberation D006367:HeLa Cells D006801:Humans D006820:Hyaluronic Acid D020100:Hydrogels D006863:Hydrogen-Ion Concentration D011134:Polysaccharides
Injectability Self-healing Hydrogel pH-responsive Drug release