Multifunctional Superparticles for Magnetically Targeted NIR‐II Imaging and Photodynamic Therapy

• Published in: Advanced science Vol. 10; no. 2; pp. e2203669 - n/a
• Main Authors: Liu, Yilin, Liang, Yuan, Lei, Pengpeng, Zhang, Zhen, Chen, Yongming
• Format: Journal Article
• Language: English
• Published: Germany John Wiley & Sons, Inc 01.01.2023; John Wiley and Sons Inc
• Subjects: Cancer therapies; Diagnostic Imaging - methods; Humans; Lasers; Light; Magnetic fields; magnetic targeting; Microemulsions; multifunction; Nanoparticles; Nanoparticles - therapeutic use; Neoplasms - diagnostic imaging; Neoplasms - drug therapy; NIR‐II imaging; Photochemotherapy - methods; Photodynamic therapy; Photosensitizing Agents; Transmission electron microscopy; Tumors; upconversion; upconversion; magnetic targeting; NIR-II imaging; photodynamic therapy; multifunction
• ISSN: 2198-3844; 2198-3844
• DOI: 10.1002/advs.202203669

Theranostics, the combination of diagnostics and therapies, has been considered as a promising strategy for clinical cancer treatment. Nonetheless, building a smart theranostic system with multifunction for different on‐demand applications still remains elusive. Herein, an easy and user‐friendly microemulsion based method is developed to modularly assemble upconversion nanoparticles (UCNPs) and Fe3O4 nanoparticles together, forming multifunctional UCNPs/Fe3O4 superparticles with highly integrated functionalities including the 808 nm excitation for real‐time NIR‐II imaging, magnetic targeting, and the upconversion luminescence upon 980 nm excitation for on‐demand photodynamic therapy (PDT). With a magnet placed nearby the tumor, in vivo NIR‐II imaging uncovers that superparticles tend to migrate toward the tumor and exhibit intense tumor accumulation, ≈6 folds higher than that without magnetic targeting 2 h after intravenous injection. NIR laser irradiation is then used to trigger PDT, obtaining an outstanding tumor elimination under magnetic tumor targeting, which shows a high potential to be applied in targeted cancer theranostics. An easy and user‐friendly microemulsion based method is developed to modularly assemble upconversion nanoparticles (UCNPs) and Fe3O4 nanoparticles together, forming a multifunctional UCNPs/Fe3O4 superparticles with highly integrated functionalities including real‐time NIR‐II imaging, magnetic targeting, and photodynamic therapy (PDT), which shows a high potential to be applied in cancer theranostics.