Self-Healing Supramolecular Self-Assembled Hydrogels Based on Poly(l-glutamic acid)

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• 作者：Guifei Li ; Jie Wu ; Bo Wang ; Shifeng Yan ; Kunxi Zhang ; Jianxun Ding ; Jingbo Yin
• 刊名：Biomacromolecules
• 出版年：2015
• 出版时间：November 9, 2015
• 年：2015
• 卷：16
• 期：11
• 页码：3508-3518
• 全文大小：845K
• ISSN：1526-4602

文摘

Self-healing polymeric hydrogels have the capability to recover their structures and functionalities upon injury, which are extremely attractive in emerging biomedical applications. This research reports a new kind of self-healing polypeptide hydrogels based on self-assembly between cholesterol (Chol)-modified triblock poly(l-glutamic acid)-block-poly(ethylene glycol)-block-poly(l-glutamic acid) ((PLGA-b-PEG-b-PLGA)-g-Chol) and 尾-cyclodextrin (尾-CD)-modified poly(l-glutamic acid) (PLGA-g-尾-CD). The hydrogel formation relied on the host and guest linkage between 尾-CD and Chol. This study demonstrates the influences of polymer concentration and 尾-CD/Chol molar ratio on viscoelastic behavior of the hydrogels. The results showed that storage modulus was highest at polymer concentration of 15% w/v and 尾-CD/Chol molar ratio of 1:1. The effect of the PLGA molecular weight in (PLGA-b-PEG-b-PLGA)-g-Chol on viscoelastic behavior, mechanical properties and in vitro degradation of the supramolecular hydrogels was also studied. The hydrogels showed outstanding self-healing capability and good cytocompatibility. The multilayer structure was constructed using hydrogels with self-healing ability. The developed hydrogels provide a fascinating glimpse for the applications in tissue engineering.