Engineering of a Nanosized Biocatalyst for Combined Tumor Starvation and Low-Temperature Photothermal Therapy

作者：Jun Zhou, Menghuan Li, Yanhua Hou, Zhong Luo, Qiufang Chen, Hexu Cao, Runlan Huo, Chencheng Xue, Linawati Sutrisno, Lan Hao, Yang Cao, Haitao Ran, Lu Lu, Ke Li, Kaiyong Cai · 发表于：ACS Nano · 年份：2018 · DOI：10.1021/acsnano.8b00309 · 被引用次数：432 · 研究领域：Nanoplatforms for cancer theranostics、Cancer, Hypoxia, and Metabolism、Cancer Research and Treatments

Tumor hypoxia is one of the major challenges for the treatment of tumors, as it may negatively affect the efficacy of various anticancer modalities. In this study, a tumor-targeted redox-responsive composite biocatalyst is designed and fabricated, which may combine tumor starvation therapy and low-temperature photothermal therapy for the treatment of oxygen-deprived tumors. The nanosystem was prepared by loading porous hollow Prussian Blue nanoparticles (PHPBNs) with glucose oxidase (GOx) and then coating their surface with hyaluronic acid (HA) via redox-cleavable linkage, therefore allowing the nanocarrier to bind specifically with CD44-overexpressing tumor cells while also exerting control over the cargo release profile. The nanocarriers are designed to enhance the efficacy of the hypoxia-suppressed GOx-mediated starvation therapy by catalyzing the decomposition of intratumoral hydroperoxide into oxygen with PHPBNs, and the enhanced glucose depletion by the two complementary biocatalysts may consequently suppress the expression of heat shock proteins (HSPs) after photothermal treatment to reduce their resistance to the PHPBN-mediated low-temperature photothermal therapies.