Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 30, Pages 25203-25212Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b08419
Keywords
copper(II); organic dye; metal-organic nanoparticle; the second near-infrared window; phototheranostics; chemotherapy
Funding
- National Natural Science Foundation of China [61575044, U1505221, 81671813, U1705281, 61705139]
- Major State Basic Research Development Program of China [2017YFA0205201]
- Joint Funds for the Innovation of Science and Technology of Fujian province [2016Y9062]
- Natural Science Foundation of Fujian Province [2016J01174, 2016J01329]
- Medical Innovation of Fujian province [2018-CX-49]
- China Postdoctoral Science Foundation [2017M612724]
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The nanosized metal-organic particles (NMOPs) recently have attracted tremendous attentions in biomedical applications. However, few studies have developed metal-organic nanoparticles (NMOPs) as near-infrared (NIR) II phototherapeutic agents and as Fenton-like agents for cancer theranostics. Herein, directly using organic dye and Cu(II)-ion complexes to construct NMOPs, as dual-mode therapeutic agent for PA imaging-guided photochemotherapy in NIR II window, is reported. The NMOPs are simply an assembly of Cu(II) ion and tetrahydroxyanthraquinone (THQ) complexes [Cu(II)-THQ](n) through the coordination effect, van der Waals force, and pi-pi interactions. After modification of polyethylene glycol (PEG-(NH2)(2)), the obtained Cu- THQNPs endow excellent biocompatibility and stability in physiological conditions. Because of the strong absorption at NIR II window and photoinduced electrontransfer (PET) mechanism, the Cu-THQNPs not only acted as an excellent photothermal agent with extremely high light-to-heat conversion ability (51.34%) at 1064 nm for phototherapy but also explored as the PA contrast agent for precisely tracking and guiding the therapy in vivo. Most strikingly, our Cu-THQNPs can be degraded by tumor-specific acidic-cleaving of the coordination bonds and follow by the slow release of Cu(II) into tumors, which can act as Fenton-like agents to generate (OH)-O-center dot from H2O2 for enhancing the antitumor efficacy in vivo. With almost 100% prevention of the tumor growth for ca. 14 days and no obvious toxicity based on blood biochemical/histological analysis, this work highlights the Cu-THQNPs as an efficient NIR II therapeutic agent for precise cancer theranostics.
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