Issue 11, 2018

Nano-graphene oxide-manganese dioxide nanocomposites for overcoming tumor hypoxia and enhancing cancer radioisotope therapy

Abstract

While radiotherapy (RT) is commonly used in clinics for cancer treatment, the therapeutic efficiency is not satisfactory owing to the existence of the hypoxic tumor microenvironment which seriously affects the efficiency of RT. Herein, we design polyethylene glycol (PEG)-modified reduced nano-graphene oxide-manganese dioxide (rGO-MnO2-PEG) nanocomposites to trigger oxygen generation from H2O2 to reduce the tumor hypoxic microenvironments. We use the radioisotope, 131I labeled rGO-MnO2-PEG nanocomposites as therapeutic agents for in vivo tumor radioisotope therapy (RIT), achieving excellent tumor killing and further enhancing the therapeutic efficiency of RIT. More importantly, the dissolution of MnO2 under acidic conditions and the redox process during the catalytic pathway of H2O2 decomposition in the cellular microenvironment direct to the production of an enormous amount of Mn2+ which has been used as a contrast agent for magnetic resonance imaging (MRI). Our proposed work provides a strategy to trigger oxygen formation via an internal stimulus to enhance imaging-guided RIT efficiency.

Graphical abstract: Nano-graphene oxide-manganese dioxide nanocomposites for overcoming tumor hypoxia and enhancing cancer radioisotope therapy

Supplementary files

Article information

Article type
Paper
Submitted
23 Nov 2017
Accepted
31 Jan 2018
First published
01 Feb 2018

Nanoscale, 2018,10, 5114-5123

Nano-graphene oxide-manganese dioxide nanocomposites for overcoming tumor hypoxia and enhancing cancer radioisotope therapy

Y. Tao, L. Zhu, Y. Zhao, X. Yi, L. Zhu, F. Ge, X. Mou, L. Chen, L. Sun and K. Yang, Nanoscale, 2018, 10, 5114 DOI: 10.1039/C7NR08747K

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