期刊
BIOMATERIALS SCIENCE
卷 6, 期 3, 页码 586-595出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8bm00003d
关键词
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资金
- National Natural Science Foundation of China (NSFC) [81422023, 81371596, 81571660, U1705281, U1505221]
- Fundamental Research Funds for the Central Universities [20720160065, 20720150141]
- Program for New Century Excellent Talents in University, China [NCET-13-0502]
- Major State Basic Research Development Program of China [2017YFA0205201, 2014CB744503, 2013CB733802]
In this work, we report on biodegradable eumelanin-Fe3O4 hybrid nanoparticles (euMel-Fe3O4 NPs) for multiple imaging-assisted local photothermolysis. The euMel-Fe3O4 NPs are rationally prepared via a facile one-step co-precipitation method in the aqueous phase in the presence of eumelanin. The obtained NPs exhibited high stability and aqueous dispersity. euMel-Fe3O4 NPs could provide T-2-weighted magnetic resonance (MR) and photoacoustic (PA) imaging contrast enhancement prior to the treatment, due to their high r(2) relaxivity that was determined to be 245.88 mM(-1)/S-1 (a value higher than those for other commercially available iron oxide NPs) and good PA signal intensity. Besides, with effective NIR absorbance, the euMel-Fe3O4 NPs promoted an effective photothermolysis treatment in an experimental mouse model of cancer. Cytotoxicity and in vivo histological examination demonstrated no appreciable toxicity. Our work suggests that euMel-Fe3O4 NPs could be proposed as a potential class of theranostic nanoplatform with multiple imaging modalities for cancer therapy.
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