光热治疗
光动力疗法
肿瘤缺氧
阿霉素
癌症研究
光敏剂
血红素
联合疗法
化学
谷胱甘肽
靶向治疗
纳米载体
药理学
适体
癌症
纳米技术
药品
化疗
体内
材料科学
医学
分子生物学
放射治疗
生物化学
生物
内科学
血红素
酶
有机化学
生物技术
作者
Kaixin Yu,Xin Hai,Shuzhen Yue,Weiling Song,Sai Bi
标识
DOI:10.1016/j.cej.2021.129535
摘要
Multimodal therapy is a combination of different therapeutic modalities within one single platform to enhance treatment efficiency, which holds great promise in biomedical research and clinical practice. Herein, a glutathione (GSH)-activated DNA-Au nanomachine with tumor-targeting capacity has been developed for imaging-guided photodynamic/photothermal/chemo combination therapy of murine breast cancer. In this theranostic nanoplatform, G-quadruplex double-stranded DNA (G-dsDNA) containing AS1411 aptamer is served as not only the targeting unit to specifically recognize murine 4T1 breast cancer cells but also the carrier for loading photosensitizer chlorins e6 (Ce6), iron-containing porphyrin hemin and anticancer drug doxorubicin (Dox). In tumor microenvironment, the excessive GSH triggers the rupture of disulfide bridges and results in the dissociation of DNA-Au nanomachine along with the release of Dox for chemotherapy and the aggregation of AuNPs for photothermal therapy (PTT) as well as in situ imaging. Meanwhile, hemin and Ce6 delivered by G-quadruplexes alleviate the tumor hypoxia, which further promotes the generation of reactive oxygen species (ROS) for enhanced photodynamic therapy (PDT). The in vitro and in vivo assays validate that the combination of PDT/PTT/chemotherapy shows a high efficiency for targeted damage of 4T1 cells and inhibition of tumor growth. Therefore, the proposed multifunctional DNA-Au nanomachine provides a powerful and robust theranostic nanoplatform for imaging-guided combinatorial anticancer therapy.
科研通智能强力驱动
Strongly Powered by AbleSci AI