Abstract
A series of novel thymidine dithiocarbamate derivatives (DTC-TdR) were successfully synthesized and then radiolabelled using [99mTc(CO)3]+ core with high yields. The chemical characterizations of 99mTc(CO)3-labelled dithiocarbamate derivatives have been carried out by preparing their corresponding rhenium complexes. The radiotracers were stable in vitro, and the partition coefficient results indicated that they were lipophilic. The cell uptake studies showed the uptakes of these 99mTc(CO)3-labelled thymidine derivatives were mediated by nucleoside transporters. Biodistribution of the complexes in mice bearing tumor showed that they had high tumor uptake and good tumor/muscle ratio. A clear SPECT imaging of the tumor location was obtained in mice bearing S180 tumor with one of radiotracers, suggesting they would be potential tumor imaging agents.
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