PEG–PEI-modified gated N-doped mesoporous carbon nanospheres for pH/NIR light-triggered drug release and cancer phototherapy
作者:Snigdharani Panda、Chandra Sekhar Bhol、Sujit Kumar Bhutia、Sasmita Mohapatra
DOI:10.1039/d1tb00362c
日期:——
multifunctional drug carrier with the controlled release of gemcitabine triggered by dual stimuli. The NMCS core upconverts NIR light to UV, which is absorbed by a photosensitive molecular gate and results in its cleavage and drug release. Further, NMCS converts NIR to heat, which deforms the outside polymer shell, thus triggering the drug release process. The release can be promptly arrested if the NIR
设计了一种新型的杂化药物载体,以N掺杂介孔碳(NMCS)为核心,PEG-PEI为外壳。在点击反应后,NMCS 被基于光可裂解硝基苄基的接头功能化。在通过功能化之前将吉西他滨加载到 NMCS 中π-π 堆积相互作用。NIR 和 NMCS-linker-PEG-PEI 的 pH 响应行为赋予多功能药物载体以双重刺激触发的吉西他滨的控释。NMCS 核心将 NIR 光上转换为 UV,UV 被光敏分子门吸收并导致其裂解和药物释放。此外,NMCS 将 NIR 转化为热量,使外部聚合物外壳变形,从而触发药物释放过程。如果关闭 NIR 源,可以立即阻止释放。在 pH 值和温度的双重刺激下,在 24 小时内实现了 75% 的有希望的吉西他滨释放。NMCS-linker-PEG-PEI 产生活性氧 (ROS),使用流式细胞术在 FaDu 细胞中验证。体外 实验表明,当暴露于 NIR 光时,NMCS-linker-PEG-PEI-GEM