Injectable and Self-Healing Nanocomposite Hydrogels with Ultrasensitive pH-Responsiveness and Tunable Mechanical Properties: Implications for Controlled Drug Delivery
作者:Meng Wu、Jingsi Chen、Weijuan Huang、Bin Yan、Qiongyao Peng、Jifang Liu、Lingyun Chen、Hongbo Zeng
DOI:10.1021/acs.biomac.0c00347
日期:2020.6.8
faintly acidic environment, which is desirable for controlled drug delivery. The pH-responsiveness of the hydrogel is ultrasensitive, where the mechanical properties, hydrolytic degradation, and drug release behaviors can alter significantly when subjected to a slight pH change of 0.2. Additionally, the hydrogel’s mechanical and pH-responsive properties can be readily tuned by its composition. Its excellent
注射剂,自愈剂和pH响应水凝胶是用于控制和局部治疗释放的出色智能药物输送系统。在中等酸性范围内表现出对pH敏感的行为的水凝胶非常适合用于治疗显示局部酸中毒的区域,例如肿瘤,伤口和感染。在这项工作中,我们基于醛官能化的聚合物和胺改性的二氧化硅纳米粒子之间的席夫碱反应,提供了一种易于制备的可注射,自修复和超敏感的pH响应纳米复合水凝胶。水凝胶在10 s内显示出快速凝胶化,可注射性和快速自愈能力。此外,水凝胶在中性生理条件下表现出出色的稳定性,而在弱酸性环境下,则观察到急剧的凝胶-溶胶转变,这对于控制药物输送是理想的。水凝胶的pH响应性是超敏感的,当pH值发生0.2的轻微变化时,其机械性能,水解降解和药物释放行为会发生显着变化。此外,水凝胶的机械性能和pH响应特性可以通过其组成轻松调整。通过对人皮肤成纤维细胞(HDFa)的细胞毒性测试,证实了其出色的生物相容性。新型的可注射,自我修复和敏感的pH