Nature Communications, 12 Apr 2018，DOI: 10.1038/s41467-018-03903-8
In vivo guiding nitrogen-doped carbon nanozyme for tumor catalytic therapy
Kelong Fan, Juqun Xi, Lei Fan, Peixia Wang, Chunhua Zhu, Yan Tang, Xiangdong Xu, Minmin Liang, Bing Jiang, Xiyun Yan & Lizeng Gao
Nanomaterials with intrinsic enzyme-like activities (nanozymes), have been widely used as artificial enzymes in biomedicine. However, how to control their in vivo performance in a target cell is still challenging. Here we report a strategy to coordinate nanozymes to target tumor cells and selectively perform their activity to destruct tumors. We develop a nanozyme using nitrogen-doped porous carbon nanospheres which possess four enzyme-like activities (oxidase, peroxidase, catalase and superoxide dismutase) responsible for reactive oxygen species regulation. We then introduce ferritin to guide nitrogen-doped porous carbon nanospheres into lysosomes and boost reactive oxygen species generation in a tumor-specific manner, resulting in significant tumor regression in human tumor xenograft mice models. Together, our study provides evidence that nitrogen-doped porous carbon nanospheres are powerful nanozymes capable of regulating intracellular reactive oxygen species, and ferritinylation is a promising strategy to render nanozymes to target tumor cells for in vivo tumor catalytic therapy.