A Novel NQO1 Enzyme-Responsive Polyurethane Nanocarrier for Redox-Triggered Intracellular Drug Release
作者:Jinhai Xie、Shuangyu Tian、Hanning Zhang、Congshu Feng、Yingchao Han、Honglian Dai、Lesan Yan
DOI:10.1021/acs.biomac.3c00134
日期:2023.5.8
two-electron reduction, resulting in rapid lactonization via an enzymatic reaction. Based on this, a novel reduction-sensitive polyurethane (PEG-PTU-PEG) block copolymer was designed and synthesized by copolymerizing diisocyanate, a reduction-sensitive monomer (TMBQ), and poly(ethylene glycol). The successful synthesis of monomers and polymers was verified by nuclear magnetic resonance (1H NMR) and
近年来,响应肿瘤微环境刺激的纳米药物运载工具的设计已成为开发癌症治疗的重要方面。其中,酶响应纳米药物递送系统尤为有效,它利用肿瘤特异性和高表达的酶作为精确靶点,从而增加靶点的药物释放,减少非特异性释放,提高疗效,同时最大限度地减少毒性对正常组织的副作用。NAD(P)H:醌氧化还原酶 1 (NQO1) 是一种与癌症相关的重要还原酶,在某些癌细胞中过度表达,尤其是在肺癌和乳腺癌中。因此,设计对NQO1具有高选择性和响应性的纳米载体对于肿瘤的诊断和治疗具有重要意义。据报道,在生理条件下,NQO1 可以通过双电子还原特异性还原三甲基锁定的苯醌结构,从而通过酶促反应快速内酯化。在此基础上,通过二异氰酸酯、还原敏感单体(TMBQ)和聚乙二醇的共聚设计合成了一种新型还原敏感聚氨酯(PEG-PTU-PEG)嵌段共聚物。通过核磁共振验证了单体和聚合物的成功合成(1 H NMR)和凝胶渗透色谱法(GPC)。然