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Issue 19, 2019
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Polydopamine-decorated tobacco mosaic virus for photoacoustic/magnetic resonance bimodal imaging and photothermal cancer therapy

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Abstract

Nanotheranostic reagents that integrate magnetic resonance imaging (MRI) and photothermal therapy (PTT) offer a promising strategy for the treatment of human disease. However, classic gadolinium (Gd)-based T1-MRI contrast agents are limited by their low relaxivity. To address this, we produced Gd-loaded Tobacco mosaic virus (TMV) particles coated with the mussel-inspired biopolymer polydopamine (PDA). Such biocompatible nanotheranostic reagents can be used to facilitate PTT, guided by multimodal magnetic resonance/photoacoustic imaging. The r1-relaxivity of the Gd-TMV–PDA particles at 60 MHz was ∼80 mM−1 s−1, compared to 13.63 mM−1 s−1 for the uncoated Gd-TMV particles. The Gd-TMV–PDA particles also promoted strong near-infrared absorption with high photothermal conversion efficiency (28.9%) and demonstrated excellent photoacoustic contrast. Multimodal imaging and PTT resulted in the effective killing of PC-3 prostate cancer cells. Gd-TMV–PDA nanoparticles therefore offer a promising theranostic approach that can now be tested in vivo in cancer models.

Graphical abstract: Polydopamine-decorated tobacco mosaic virus for photoacoustic/magnetic resonance bimodal imaging and photothermal cancer therapy

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Supplementary files

Article information


Submitted
09 Mar 2019
Accepted
20 Apr 2019
First published
08 May 2019

Nanoscale, 2019,11, 9760-9768
Article type
Paper

Polydopamine-decorated tobacco mosaic virus for photoacoustic/magnetic resonance bimodal imaging and photothermal cancer therapy

H. Hu, Q. Yang, S. Baroni, H. Yang, S. Aime and N. F. Steinmetz, Nanoscale, 2019, 11, 9760
DOI: 10.1039/C9NR02065A

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