Gold nanoparticles doped metal-organic frameworks as near-infrared light-enhanced cascade nanozyme against hypoxic tumors  

作　　者：Xinli Liu Yongchun Pan Jingjing Yang Yanfeng Gao Ting Huang Xiaowei Luan Yuzhen Wang Yujun Song 

机构地区：[1]Department of Biomedical Engineering and Jiangsu Key Laboratory of Artificial Functional Materials,College of Engineering and Applied Sciences,Nanjing University,Nanjing,210093,China [2]Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University,Nanjing,211816,China

出　　处：《Nano Research》2020年第3期653-660,共8页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.21874066,81601632 and 61804076);the Natural Science Foundation of Jiangsu Province(Nos.BK20160616 and BK20180700);the Fundamental Research Funds for Central Universities,the Shuangchuang Program of Jiangsu Province,and the Thousand Talents Program for Young Researchers.

摘　　要：We report gold nanoparticles(AuNPs)doped iron-based metal-organic frameworks(GIM)which displays near-infrared light(NIR)-enhanced cascade nanozyme against hypoxic tumors.Due to the strong protein adsorption-induced surface passivation,AuNPs suffer from the loss of glucose oxidase(GOx)activity.However,GIM could protect the GOx-like activity of AuNPs with the satisfactory shield capability.In addition,GIM exhibited excellent photothermal conversion ability and unique NIR light-enhanced GOx-like activity,which could efficiently increase the endogenous H2O2 production.Meanwhile,as the produced H2O2 is converted by GIM into O2 and highly toxic OH.Thus,GIM-catalyzed cascade reactions with NIR light irradiation not only offer the O2 but also promote the reactive oxygen species(ROS)generation at tumor sites.The produced O2 could be further applied to AuNPs catalytic oxidation of glucose and relieve hypoxic condition of tumor microenvironment(TME).As a proof-of-concept study,GIM demonstrates the admirable tumor ablation under NIR irradiation in vivo.

关 键 词：nanozyme metal-organic frameworks gold nanoparticles near-infrared light reactive oxygen species 

分 类 号：TB383[一般工业技术—材料科学与工程]