Development of tumor marker detection and tumor treatment based on silver nanozymes

Nanomaterials with intrinsic enzyme activity (nanozymes) have been widely used as artificial enzymes in biomedicine, especially in tumor diagnosis and treatment. Herein, a kind of water-soluble silver nanozyme (Ag@GQD) was developed with a simple method, which showed two enzymatic activities (peroxidase and oxidase-like activity). Based on the excellent catalytic performance of oxidase-like activity, a simple and highly sensitive colorimetric detection strategy for glutathione (GSH) was established. What's more, after absorbing DOX, Ag/DOX@GQD could realize the combined treatment of reactive oxygen species and chemotherapy. In conclusion, this study provided evidences that Ag@GQD is effective in tumor diagnosis and treatment, which provided new ideas for exploring nanozymes based on the integration of diagnosis and treatment.