An erythrocyte membrane coated mimetic nano-platform for chemo-phototherapy and multimodal imaging.

The tumor variability and low efficiency associated with conventional chemical drugs provide an impetus to develop drug-carrying systems with targeted accumulation and controllable release behavior. Herein, DOX-loaded Prussian blue (PB) nano-composites are developed after coating with erythrocyte membrane (EM) and modifying with folic acid (FA). In these nano-composites, PB nanoparticles mixture with different shapes were adopted to improve the photothermal performance, which is highly helpful for cancer photothermal ablation and controllable drug release. In addition, the nano-composites were endowed with high biocompatibility, immune evading capacity, pH-/photo-responsive release behavior, and markedly prolonged blood circulation time, which was reflected by a 99.6% cervical tumor growth inhibition value (TGI) . Meanwhile, they functioned as multimodal bioimaging agents for photothermal, fluorescence, and photoacoustic imaging of tumors. The reported strategy can be applied for personalized therapy of various tumors by modifying the tumor-targeting molecule on the surface of nanoparticles.