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Polymer ligand-assisted fabrication of multifunctional and redox-responsive self-assembled magnetic nanoclusters for bimodal imaging and cancer treatment

Abstract

Multifunctional nanoplatforms that can combine diagnostic functions and therapeutic capabilities are highly required in the construction of novel cancer diagnosis-therapy integrative systems. In this work, we developed a multifunctional and tumor redox-responsive magnetic nanocluster (RMN) by the self-assembly of iron oxide nanoparticles with chlorin e6 (Ce6)-disulfide-linked polymer ligand. The core of RMN could enhance the T2-weighted MR contrast capability, and the surface ligand could improve system stability and load Ce6. In addition, the obtained RMNs also exhibited excellent biocompatibility and higher cytotoxicity upon near infrared (NIR)-irradiation. These RMNs with a size of ~90 nm can effectively facilitate their accumulation in tumor sites through the enhanced permeability and retention (EPR) effect and subsequently are endocytosed into a high reductive intracellular environment that activates fluorescence and photodynamic therapeutic antitumor activity. Furthermore, the in vivo imaging and therapy results not only confirmed that RMNs can as a bimodal imaging probe for the early-stage diagnosis of cancer but also demonstrated the superior photodynamic therapeutic efficiency of RMNs in suppressing tumor growth. These results indicated that the RMNs show great potential for simultaneous diagnostic imaging and photodynamic therapy.

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Publication details

The article was received on 11 Jul 2018, accepted on 09 Aug 2018 and first published on 09 Aug 2018


Article type: Paper
DOI: 10.1039/C8TB01798K
Citation: J. Mater. Chem. B, 2018, Accepted Manuscript
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    Polymer ligand-assisted fabrication of multifunctional and redox-responsive self-assembled magnetic nanoclusters for bimodal imaging and cancer treatment

    H. Y. Yang, Y. Fu, Y. Li, M. Jang, J. Lee and D. S. Lee, J. Mater. Chem. B, 2018, Accepted Manuscript , DOI: 10.1039/C8TB01798K

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