Nano-Micro Letters

Indocyanine Green-Conjugated Magnetic Prussian Blue Nanoparticles for Synchronous Photothermal/Photodynamic Tumor Therapy

Peng Xue1,2, Ruihao Yang1,2, Lihong Sun1,2, Qian Li1,2, Lei Zhang3, Zhigang Xu1,2, Yuejun Kang1,2

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Nano-Micro Lett. (2018) 10: 74

First Online: 25 October 2018 (Article)


*Corresponding author. E-mail: xuepeng@swu.edu.cn ; yjkang@swu.edu.cn





Indocyanine green (ICG) is capable of inducing a photothermal effect and the production of cytotoxic reactive oxygen species for cancer therapy. However, the major challenge in applying ICG molecules for antitumor therapy is associated with their instability in aqueous conditions and rapid clearance from blood circulation, which causes insufficient bioavailability at the tumor site. Herein, we conjugated ICG molecules with Prussian blue nanoparticles enclosing a Fe3O4 nanocore, which was facilitated by cationic polyethyleneimine via electrostatic adsorption. The nanocarrier-loaded ICG formed stable aggregates that enhanced cellular uptake and prevented fluorescence quenching. Moreover, the strong superparamagnetism of the Fe3O4 core in the obtained nanocomposites further improved cellular internalization of the drugs guided by a localized magnetic field. The therapeutic efficacy of this nanoplatform was evaluated using tumor models established in nude mice, which demonstrated remarkable tumor ablation in vivo due to strong photothermal/photodynamic effects. This study provides promising evidence that this multifunctional nanoagent might function as an efficient mediator for combining photothermal and photodynamic cancer therapy.



Combination therapy, Prussian blue nanoparticles, Photothermal therapy, Photodynamic therapy, Indocyanine green 

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