Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 28, Pages 4386-4396Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201400221
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Funding
- National Nature Science Foundation of China [51302293, 51132009, 51072212, 81270047, 21177137]
- National Basic Research Program of China (973 Program) [2011CB707905, 2010CB934000]
- China National Funds for Distinguished Young Scientists [51225202]
- Natural Science Foundation of Shanghai [13ZR1463500]
- Nano Special Program of the Science and Technology Commission of Shanghai [11nm0506500]
- Foundation for Youth Scholar of State Key Laboratory of High Performance Ceramics and Superfine Microstructures [SKL201203]
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Construction of multifunctional stimuli-responsive nanosystems intelligently responsive to inner physiological and/or external irradiations based on nano-biotechnology can enable the on-demand drug release and improved diagnostic imaging to mitigate the side-effects of anticancer drugs and enhance the diagnostic/therapeutic outcome simultaneously. Here, a triple-functional stimuli-responsive nanosystem based on the co-integration of superparamagnetic Fe3O4 and paramagnetic MnOx nanoparticles (NPs) onto exfoliated graphene oxide (GO) nanosheets by a novel and efficient double redox strategy (DRS) is reported. Aromatic anticancer drug molecules can interact with GO nanosheets through supramolecular pi stacking to achieve high drug loading capacity and pH-responsive drug releasing performance. The integrated MnOx NPs can disintegrate in mild acidic and reduction environment to realize the highly efficient pH-responsive and reduction-triggered T-1-weighted magnetic resonance imaging (MRI). Superparamagnetic Fe3O4 NPs can not only function as the T-2-weighted contrast agents for MRI, but also response to the external magnetic field for magnetic hyperthermia against cancer. Importantly, the constructed biocompatible GO-based nanoplatform can inhibit the metastasis of cancer cells by downregulating the expression of metastasis-related proteins, and anticancer drug-loaded carrier can significantly reverse the multidrug resistance (MDR) of cancer cells.
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