College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China.
National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
ACS Appl Mater Interfaces. 2020 Mar 18;12(11):13360-13370. doi: 10.1021/acsami.0c00468. Epub 2020 Mar 5.
It is a still tough task to precisely target cancer cells and efficiently improve the therapeutic efficacy of various therapies at the same time. Here, dual-template imprinting polymer nanoparticles (MIPs) with a core-shell structure were prepared, in which fluorescent silica nanoparticles (FSiO) were the core and the imprinted polymer layers were the outermost shell. The imprinted layer was designed and constructed via free-radical precipitation approach on the surface of FSiO, which simultaneously encapsulated gadolinium-doped silicon quantum dots and photosensitizers (Ce6). During the polymerization process, two template molecules were introduced into the mixtures, one was the epitope of CD59 protein (YNCPNPTADCK), which was overexpressed on the surface of a great deal of the solid cancers, and the other was antitumor agent doxorubicin (DOX) to be used for chemotherapy. Furthermore, the embedded Ce6 could generate toxic O under 655 nm laser irradiation to kill cancer cells, combining with the loaded-DOX to obtain a synergistic cancer therapy. Moreover, owing to the introduction of gadolinium-doped silicon quantum dots, Ce6, and DOX, the MIPs were endowed with targeted fluorescence imaging (FI) and MR imaging (MRI). In vitro and in vivo experiments had been conducted to demonstrate the excellent targeting ability and desirable treatment effect with negligible toxicity to healthy tissues and organs. As a consequence, the designed MIPs can promote the development of targeted recognition against biomarkers and precise treatment guided with cell imaging tools.
精准靶向癌细胞并同时有效提高各种疗法的治疗效果仍然是一项艰巨的任务。在这里,制备了具有核壳结构的双模板印迹聚合物纳米粒子(MIPs),其中荧光硅纳米粒子(FSiO)为核,印迹聚合物层为最外层壳。印迹层通过 FSiO 表面的自由基沉淀法设计和构建,同时包封了掺镝硅量子点和光敏剂(Ce6)。在聚合过程中,将两种模板分子引入混合物中,一种是 CD59 蛋白(YNCPNPTADCK)的表位,该表位在大量实体瘤表面过表达,另一种是抗肿瘤药物阿霉素(DOX)用于化疗。此外,嵌入的 Ce6 在 655nm 激光照射下可以产生有毒的 O 来杀死癌细胞,并与负载的 DOX 结合以获得协同的癌症治疗效果。此外,由于引入了掺镝硅量子点、Ce6 和 DOX,MIPs 具有靶向荧光成像(FI)和磁共振成像(MRI)。已经进行了体外和体内实验,以证明其具有优异的靶向能力和理想的治疗效果,对健康组织和器官几乎没有毒性。因此,设计的 MIPs 可以促进针对生物标志物的靶向识别和以细胞成像工具为指导的精确治疗的发展。