Long circulating reduced graphene oxide-iron oxide nanoparticles for efficient tumor targeting and multimodality imaging.
Polyethylene glycol (PEG) surface modification is one of the most widely used approaches to improve the solubility of inorganic nanoparticles, prevent their aggregation and prolong their in vivo blood circulation half-life. Herein, we developed double-PEGylated biocompatible reduced graphene oxide nanosheets anchored with iron oxide nanoparticles (RGO-IONP-(1st)PEG-(2nd)PEG). The nanoconjugates exhibited a prolonged blood circulation half-life (∼27.7 h) and remarkable tumor accumulation (>11 %ID g(-1)) via an enhanced permeability and retention (EPR) effect. Due to the strong near-infrared absorbance and superparamagnetism of RGO-IONP-(1st)PEG-(2nd)PEG, multimodality imaging combining positron emission tomography (PET) imaging with magnetic resonance imaging (MRI) and photoacoustic (PA) imaging was successfully achieved. The promising results suggest the great potential of these nanoconjugates for multi-dimensional and more accurate tumor diagnosis and therapy in the future.
Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education and State Key Laboratory for Chemo/Biosensing and Chemometrics, Collage of Biology, Hunan University, Changsha, 410082, People's Republic of China. thwang@aphy.iphy.ac.cn.
Cheng
C
Xu
Sixiang
S
Shi
Liangzhu
L
Feng
Feng
F
Chen
Stephen A
SA
Graves
Emily B
EB
Ehlerding
Shreya
S
Goel
Haiyan
H
Sun
Christopher G
CG
England
Robert J
RJ
Nickles
Zhuang
Z
Liu
Taihong
T
Wang
Weibo
W
Cai
D000818:Animals; D001672:Biocompatible Materials; D045744:Cell Line, Tumor; D005260:Female; D005290:Ferric Compounds; D006108:Graphite; D008279:Magnetic Resonance Imaging; D051379:Mice; D008807:Mice, Inbred BALB C; D064847:Multimodal Imaging; D053758:Nanoparticles; D009374:Neoplasms, Experimental / Q000000981:diagnostic imaging*; D010087:Oxides; D061088:Photoacoustic Techniques; D011092:Polyethylene Glycols; D000072078:Positron Emission Tomography Computed Tomography
D001672:Biocompatible Materials; D005290:Ferric Compounds; D010087:Oxides; C000499:ferric oxide; D011092:Polyethylene Glycols; D006108:Graphite