A Thermoresponsive Antimicrobial Wound Dressing Hydrogel Based on a Cationic Betaine Ester
作者:Luo Mi、Hong Xue、Yuting Li、Shaoyi Jiang
DOI:10.1002/adfm.201100871
日期:2011.11.8
wound infection by releasing small‐molecular‐weight antimicrobial drug and facilitate the attachment of mammalian cells during tissue regeneration through its positive surface charge. The cationic betaine ester can then hydrolyze at the wound site to its zwitterionic form, which is known to be biocompatible and nonsticky. The thermoresponsive in situ gelation feature along with controlled drug release
这项工作报告了基于ABA三嵌段共聚物的热响应多功能伤口敷料水凝胶,该ABA三嵌段共聚物是通过可逆加成断裂链转移(RAFT)聚合合成的。内部的B嵌段由带正电荷的可水解甜菜碱酯和抗微生物药组成,该抗微生物剂作为抗衡离子,B嵌段的两侧是两个外部的A嵌段的热敏性聚(N-异丙基丙烯酰胺)(PNIPAM)。可以将包含三嵌段共聚物的溶液应用于伤口部位,并在体温下立即变成物理凝胶。这种伤口敷料可通过释放小分子量抗菌药物来降低伤口感染的风险,并通过其正表面电荷促进组织再生过程中哺乳动物细胞的附着。阳离子甜菜碱酯然后可以在伤口部位水解成两性离子形式,这是已知的生物相容性和非粘性。热响应性原位凝胶化功能以及受控的药物释放,增强的组织-水凝胶相互作用以及长期的生物相容性使这种水凝胶成为抗菌伤口敷料应用中非常有希望的材料。