LIN Xue,XU Jie-hua,DUAN Ya-ni,et al.Preparation and Biodistribution of 131I-labeled Hepatoma Nucleic Acid Nanotrain[J].Journal of Sun Yat-sen University(Medical Sciences),2023,44(03):416-422.
LIN Xue,XU Jie-hua,DUAN Ya-ni,et al.Preparation and Biodistribution of 131I-labeled Hepatoma Nucleic Acid Nanotrain[J].Journal of Sun Yat-sen University(Medical Sciences),2023,44(03):416-422. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2023.0307.
Preparation and Biodistribution of 131I-labeled Hepatoma Nucleic Acid Nanotrain
Ⅰ-labeled hepatoma nucleic acid nanotrain and to explore its feasibility as a new nuclide carrier targeting hepatoma.
Methods
2
Three short nucleic acid chains self-assembled to a long nucleic acid chain after being annealed, and
131
Ⅰ-NT was obtained by radioiodine labeling using chloramine T method. The labeling efficiency and radiochemical purity of the nanoparticles were measured by paper chromatography. The stability of the labeled products in vitro at different temperatures and different storage solvents was detected. The specific uptake of nanoparticles by hepatocellular carcinoma cells was observed by laser confocal microscopy, and the radioactive uptake ratio of
131
Ⅰ-NT combined with human hepatocellular carcinoma cell HepG2 and normal hepatocyte L02 was measured. The biodistribution of
131
Ⅰ-NT was obtained through injecting
131
Ⅰ-NT into HepG2 tumor-bearing mice via tail vein.
Results
2
The labeling rate of
131
Ⅰ-NT was (93.05±0.74) %, and the radiochemical purity post purification was (98.35±0.32) %. Its radiochemical purity in PBS and pure serum at 4℃ for 24 h was (92.77±0.04) % and (89.43±0.2) %, respectively. The radioactivity uptake rate of HepG2 cells was higher than that of L02 cells after
131
Ⅰ-NT was incubated with two kinds of cells for 2 h significantly. After injection of
131
Ⅰ-NT through tail vein, the radioactive uptake per gram of tumor tissue were (4.9±0.55)%ID/g, (10.12±0.32)%ID/g and (4.25±0.31)%ID/g at 30 min, 1 h and 2 h, respectively. The T/M ratio was 7.33±2.04, 36.54±12.72 and 44.93±7.90 respectively.
Conclusions
2
The
131
Ⅰ-labeled long chain nucleic acid nanotrain was constructed successfully, which possesses relatively high stability in vitro , and high targeting ability to HepG2 cells in vitro and HepG2 tumor-bearing mouse model. Our study demonstrated that
131
Ⅰ-NT may be a potential radionuclide carrier targeting human liver cancer, which provides a new idea for the targeted radionuclide diagnosis and treatment of hepatocellular carcinoma.
关键词
Keywords
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