A tumor-targeting near-infrared laser-triggered drug delivery system based on GO@Ag nanoparticles for chemo-photothermal therapy and X-ray imaging.
【作者】 Shi, Jinjin; Wang, Lei; Zhang, Jing; Ma, Rou; Gao, Jun; Liu, Yan; Zhang, Chaofeng; Zhang, Zhenzhong
【期刊名】 Biomaterials
【影响因子】 2014年: 8.557
【作者单位】 School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, PR China
【年，卷(期)：页码】2014, 35(22): 5847-5861
【关键词】 Controlled drug release; GO@Ag; Tumor-targeting; X-ray imaging
【摘要】In this study, a GO@Ag nanocomposite was synthesized by chemical deposition of Ag nanoparticles onto graphene oxide (GO) through a hydro thermal reaction, and doxorubicin (DOX), one of the most effective drugs against a wide range of cancers, was employed as the model drug and linked to GO@Ag via ester bonds with a very high drug loading efficiency (∼82.0%, weight ratio of DOX/GO@Ag), then GO@Ag-DOX was functionalized by DSPE-PEG2000-NGR, giving GO@Ag-DOX with active tumor-targeting capacity and excellent stability in physiological solutions. The release profiles of DOX from GO@Ag-DOX-NGR showed strong dependences on near-infrared (NIR) laser and the SPR effect of Ag nanoparticles. Compared with free DOX in an in vivo murine tumor model, GO@Ag-DOX-NGR afforded much higher antitumor efficacy without obvious toxic effects to normal organs owing to 8.4-fold higher DOX uptake of tumor and 1.7-fold higher DOX released in tumor with NIR laser than the other tissues. Besides, in this work, GO@Ag-DOX-NGR not only served as a powerful tumor diagnostic X-ray contrast agent, but also as a strong agent for photothermal ablation of tumor, the ability of GO@Ag-DOX-NGR nanoparticles to combine the local specific chemotherapy with external photothermal therapy (PTT) significantly improved the therapeutic efficacy. GO@Ag-DOX-NGR showed excellent chem-photothermal therapeutic efficacy, tumor-targeting property, NIR laser-controlled drug releasing function and X-ray imaging ability, demonstrating that there is a great potential of GO@Ag-DOX-NGR for cancer diagnosis and therapy.
【全文链接】http://www.sciencedirect.com/science/article/pii/S0142961214003020?via%3Dihub
