Preparation and Properties of 68Ga-NOTA-SPIO as PET/MRI Dual-modal Imaging Agent
10.3969/j.issn.1005-5185.2017.05.003
- VernacularTitle:PET/MRI双模态显像剂68Ga-NOTA-SPIO的制备及其性质初步研究
- Author:
Fan WU
;
Xinlu WANG
;
Jilin YIN
;
Jinhe ZHANG
;
Xi OUYANG
;
Zheng ZHOU
;
Yuting YANG
;
Jianqiu ZHONG
- Keywords:
Positron-emission tomography;
Magnetic resonance imaging;
Nanoparticles;
Gallium radioisotopes;
Molecular probes;
Diagnostic imaging
- From:
Chinese Journal of Medical Imaging
2017;25(5):329-334
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To prepare 68Ga-NOTA-SPIO as PET/MRI dual mode imaging probe with high sensitivity and resolution,and further evaluate its in vitro and partly in vivo biological properties.Materials and Methods The precursor SPIO-PEG2000-NOTA was prepared and characterized.The precursor was radiolabeled by using one step method to prepare 68Ga-NOTA-SPIO as dual mode imaging probe.The labeling rate of the probe was determined by rapid thin-layer chromatography.Besides,the in vitro stability and lipid water partition coefficient of the probe were evaluated,and its biodistribution in normal mice was also observed.Results The precursor SPIO-PEG2000-NOTA with uniform dispersion and uniform particle size was prepared,and the dual mode probe 68Ga-NOTA-SPIO was synthesized.The labeling rate reached 99％,and the lipid water partition coefficient (Log P) was (-2.60±0.13).The radiochemical purity of the probe was higher than 95％,as it was incubated in the phosphate buffer and fetal bovine serum within 2 hours.The probe was mainly distributed in the liver and spleen of mice,and its clearance velocity in blood was fast.Conclusion The double mode probe 68Ga-NOTA-SPIO synthesized by one step method has high labeling rate with no need of purification,which has good physic-chemical properties and biocompatibility.The probe can be used in the further research of PET/MRI dual modality imaging.
