The design rationale, synthesis and radiolabeling evaluation of four glucosamine conjugated ligands for the [99mTc(CO)3]+ core is described. The capability to bind the tricarbonyl core is initially demonstrated using the cold surrogate [Re(CO)3]+. The four compounds are competent chelates in binding [99mTc(CO)3]+ as labeling studies show, with yields ranging from 79 to 96% and the resulting complexes showing stability in the presence of competing chelates for 24 h at 37 °C. The rhenium complexes were tested for hexokinase-catalysed phosphorylation, and the technetium complexes were tested for GLUT-1 mediated cell uptake - they showed a small amount of uptake but it was not glucose dependent, suggesting that it was not via the GLUT-1 transporters.
本文介绍了[99m
锝(CO)3]+ 核心的四种
氨基葡萄糖共轭
配体的设计原理、合成和放射性标记评估。使用冷代用物[Re(CO)3]+初步证明了与三羰基核心结合的能力。标记研究表明,这四种化合物都能与[99mTc(CO)3]+螯合,产率从 79% 到 96% 不等,所产生的配合物在有竞争螯合物存在的情况下于 37 °C 下保持稳定 24 小时。对
铼复合物进行了
己糖激酶催化的
磷酸化测试,对
锝复合物进行了 GLUT-1 介导的细胞摄取测试--它们显示了少量的摄取,但这种摄取并不依赖于
葡萄糖,这表明摄取不是通过 GLUT-1 转运体进行的。