Journal
ACS NANO
Volume 12, Issue 4, Pages 3917-3927Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.8b01456
Keywords
metal/tannic acid complex (MITA); photothermal platform; multimodal imaging; combinational therapy; multimodal theranostic
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Funding
- National Key Research and Development Program of China [2016YFC1100703]
- National Natural Science Foundation of China [51533006, 21374085]
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This study reports a family of photothermal materials, metal ion/tannic acid assemblies (MITAs). MITAs from Fe-III,V-III, and Ru-III afford excellent photothermal efficiency (eta approximate to 40%). Sharply differing from the currently existing photothermal agents, MITAs are highlighted by merits including green synthesis, facile incorporation of diagnostic metal ions, and particularly topology-independent adhesion. Owing to the adhesion nature of MITAs, various kinds of MITA-based nanoengineerings are readily available via the self-adhesion of MITAs onto diverse templates, enabling MITAs well suited as a photothermal platform for versatile combination with other therapy approaches and imaging techniques. As a proof of concept, polymeric/inorganic nanoparticle/nanovesicle-supported Fe-III-tannic acid (Fe(III)TA) is fabricated. The photothermal effect is shown to be unaffected by the template origin and type and Fe(III)TA thickness on the templates. We validate the potency of nanovesicle-supported Fe(III)TA (PNV@Fe(III)TA) for tumor-specific photoactivated utilizations, including NIR photothermal therapy with complete tumor elimination, photothermal imaging (PTI), and photoacoustic imaging (PAI) in addition to T-1-MRI imaging. PNV@Fe(III)TA can be simultaneously equipped with functionalities, including T-2-MRI imaging by additionally doping Mn-II and NIR fluorescence imaging by encapsulating a hydrophilic NIR fluoroprobe. MITA demonstrates unparalleled superiority as a photothermal platform in engineering multimodal theranostics for advanced applications.
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