title: Sub-10 nm monoclinic Gd2O3:Eu3+ nanoparticles as dual-modal nanoprobes for magnetic resonance and fluorescence imaging.
abstract: Monoclinic Gd2O3:Eu(3+) nanoparticles (NPs) possess favorable magnetic and optical properties for biomedical application. However, how to obtain small enough NPs still remains a challenge. Here we combined the standard solid-state reaction with the laser ablation in liquids (LAL) technique to fabricate sub-10 nm monoclinic Gd2O3:Eu(3+) NPs and explained their formation mechanism. The obtained Gd2O3:Eu(3+) NPs exhibit bright red fluorescence emission and can be successfully used as fluorescence probe for cells imaging. In vitro and in vivo magnetic resonance imaging (MRI) studies show that the product can also serve as MRI good contrast agent. Then, we systematically investigated the nanotoxicity including cell viability, apoptosis in vitro, as well as the immunotoxicity and pharmacokinetics assays in vivo. This investigation provides a platform for the fabrication of ultrafine monoclinic Gd2O3:Eu(3+) NPs and evaluation of their efficiency and safety in preclinical application.
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University , 135 Xingang Xi Road, Guangzhou 510275, P.R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Xiumei
authors.initials: X
authors.lastname: Tian
authors.forename: Ningqi
authors.initials: N
authors.lastname: Luo
authors.forename: Chuan
authors.initials: C
authors.lastname: Yang
authors.forename: Jun
authors.initials: J
authors.lastname: Xiao
authors.forename: Yuanzhi
authors.initials: Y
authors.lastname: Shao
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Chen
authors.forename: Guowei
authors.initials: G
authors.lastname: Yang
authors.forename: Dihu
authors.initials: D
authors.lastname: Chen
authors.forename: Li
authors.initials: L
authors.lastname: Li
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D002460:Cell Line; D005063:Europium / Q000737:chemistry*; D005260:Female; D005682:Gadolinium / Q000737:chemistry* / Q000493:pharmacokinetics / Q000633:toxicity; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D053768:Metal Nanoparticles / Q000737:chemistry*; D051379:Mice; D008958:Models, Molecular; D008968:Molecular Conformation; D061848:Optical Imaging / Q000379:methods*; D010316:Particle Size; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology
chemical_list: D005063:Europium; C030581:gadolinium oxide; D005682:Gadolinium