Synthesis and In vitro Evaluation of<sup>99m</sup>Tc-diglucosediethylenetriamine (DGTA) as a Potential Tumor Imaging Agent
作者:Sang-Ju Lee、Seung-Jun Oh、Jung-Young Kim、Jin-Sook Ryu、Seog-Young Kim、Dae-Hyuk Moon
DOI:10.5012/bkcs.2011.32.7.2410
日期:2011.7.20
Using a single step chemical synthesis, we synthesized the potential tumor imaging agent $^99m}Tc$-diglucose-diethylenetriamine (DGTA) from diethylenetriamine and natural D-glucose. 10 min Incubation of 10 mg of precursor with 50 $\mu}g$ of $SnCl_2\cdot}2H_2O$ at room temperature yielded over 95% of $^99m}Tc$ labeling. The stability for 6 hours in saline or human plasma was over 90%. In vitro tumor cell uptake assays using the SNU-C5 and 9 L cell lines showed that, in 0-400 mg/dL glucose medium, cell uptake of $^99m}Tc$-DGTA was 1.5-8 times higher than that of [$^18}F$]FDG. Moreover, [$^18}F$]FDG uptake was dependent on glucose concentration in the medium, whereas cellular uptake of $^99m}Tc$-DGTA was not dependent on glucose concentration, suggesting that the two compounds have different uptake mechanisms by tumor cells.
我们采用一步化学合成法,从二乙烯三胺和天然 D-葡萄糖中合成了潜在的肿瘤成像剂 $^99m}Tc$-二葡萄糖-二乙烯三胺(DGTA)。10 分钟 将 10 毫克前体与 50 $\mu}g$ 的 $SnCl_2\cdot}2H_2O$ 在室温下孵育,可获得 95% 以上的 $^99m}Tc$ 标记。在生理盐水或人体血浆中 6 小时的稳定性超过 90%。使用 SNU-C5 和 9 L 细胞系进行的体外肿瘤细胞摄取试验表明,在 0-400 mg/dL 葡萄糖培养基中,细胞对 $^99m}Tc$-DGTA 的摄取量是 [$^18}F$]FDG 的 1.5-8 倍。此外,[$^18}F$]FDG的吸收与培养基中的葡萄糖浓度有关,而细胞对$^99m}Tc$-DGTA的吸收与葡萄糖浓度无关,这表明肿瘤细胞对这两种化合物的吸收机制不同。