Abstract
Purpose
To develop a multi-functional theranostic nanoplatform with increased tumor retention, improving antitumor efficacy and decreased side effects of chemotherapy drugs.
Methods
GO@Gd nanocomposites was synthesized via decorating gadolinium (Gd) nanoparticles (GdNP) onto graphene oxide (GO), and then functionalized by polyethylene glycol (PEG2000), folic acid (FA), a widely used tumor targeting molecule, was linked to GO@Gd-PEG, finally, doxorubicin (DOX) was loaded onto GO@Gd-PEG-FA and obtained a tumor-targeting drug delivery system (GO@Gd-PEG-FA/DOX). GO@Gd-PEG-FA/DOX was characterized and explored its theranostic applications both in a cultured MCF-7 cells and tumor-bearing mice.
Results
GO@Gd-PEG-FA/DOX could efficiently cross the cell membranes, lead to more apoptosis and afford higher antitumor efficacy without obvious toxic effects to normal organs owing to its prolonged blood circulation and 7.6-fold higher DOX uptake of tumor than DOX. Besides, GO@Gd-PEG-FA/DOX also served as a powerful photothermal therapy (PTT) agent for thermal ablation of tumor and a strong T1-weighted contrast agent for tumor MRI diagnosis. The multi-functional nanoplatform also could selectively kill cancer cells in highly localized regions via the excellent tumor-targeting and MRI guided PTT abilities.
Conclusions
GO@Gd-PEG-FA/DOX exhibited excellent photothermal-chemotherapeutic efficacy, tumor-targeting property and tumor diagnostic ability.
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Abbreviations
- DEG:
-
Diethylene glycol
- DMEM:
-
Dulbecco modified eagle medium
- DMSO:
-
Dimethyl sulfoxide
- DOX:
-
Doxorubicin
- EDC∙HCl:
-
N-(3-dimethylamino propyl-N0-ethylcar-bodiimide) hydrochloride
- EG:
-
Ethylene glycol
- FA:
-
Folic acid
- Gd:
-
Gadolinium
- GO:
-
Graphene oxide
- NIR:
-
Near infrared
- PEG2000:
-
Polyethylene glycol 2000
- SRB:
-
Sulforhodamine B
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ACKNOWLEDGMENTS AND DISCLOSURES
The work is supported by grants from the National Natural Science Foundation of China (Nos.81273451, 81302717 and 81101684) and Postdoctoral Science Foundation of China (2015M582210).
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Shi, J., Wang, B., Chen, Z. et al. A Multi-Functional Tumor Theranostic Nanoplatform for MRI Guided Photothermal-Chemotherapy. Pharm Res 33, 1472–1485 (2016). https://doi.org/10.1007/s11095-016-1891-7
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DOI: https://doi.org/10.1007/s11095-016-1891-7