Journal
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
Volume 14, Issue 7, Pages 2475-2483Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nano.2017.03.019
Keywords
Magnetic resonance imaging; Contrast agent; Graphene oxide; Human mesenchymal stem cells; Cell labeling
Funding
- Ministry of Science and Technology of China [2014CB965003]
- Chinese Academy of Sciences [ZDRW-ZS-2016-2]
- National Natural Science Foundation of China [81501074]
- China Postdoctoral Science Foundation [2015M571836]
- Natural Science Foundation of Jiangsu Province [BK20150363]
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Herein, we report on development of a two-dimensional nanomaterial graphene oxide (GO)-based T-1 magnetic resonance imaging (MRI) contrast agent (CA) for in vitro and in vivo labeling of human mesenchymal stem cells (hMSCs). The CA was synthesized by PEGylation of ultrasmall GO, followed by conjugation with a chelating agent DOTA and then gadolinium(III) to form GO-DOTA-Gd complexes. Thus-prepared GO-DOTA-Gd complexes exhibited significantly improved T-1 relaxivity, and the r(1) value was 14.2 mM(-1) s(-1) at 11.7 T, approximately three times higher than Magnevist, a commercially available CA. hMSCs can be effectively labeled by GO-DOTA-Gd, leading to remarkably enhanced cellular MRI effect without obvious adverse effects on proliferation and differentiation of hMSCs. More importantly, in vivo experiment revealed that intracranial detection of 5 x 10(5) hMSCs labeled with GO-DOTA-Gd is achieved. The current work demonstrates the feasibility of the GO-based T-1 MRI CA for stem cell labeling, which may find potential applications in regenerative medicine. (C) 2017 Elsevier Inc. All rights reserved.
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