Synthesis, radiolabeling and biodistribution studies of [99mTc(CO)3(MN-TZ-BPA)]+ in tumor-bearing mice |
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Authors: | Jianjun Wang Yuan Tian Xiaojiang Duan Jing Yang Huining Mao Cunmin Tan Wangsuo Wu |
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Institution: | (1) Radiochemistry Lab, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, People’s Republic of China |
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Abstract: | This study reports the synthesis, radiolabeling and preliminary biodistribution results of 99mTc(CO)3(MN-TZ-BPA)]+ in tumor-bearing mice. The novel nitroimidazole derivative was successfully synthesized by conjugation of bis(pyridin-2-ylmethyl)amine
(BPA) to 2-methyl-5-niroimidazole via “click” reaction. The ligand could be labeled by 99mTc(CO)3]+ core in high yield to get 99mTc(CO)3(MN-TZ-BPA)]+, which was very hydrophilic and was stable at room temperature. Biodistribution studies in tumor-bearing mice showed that
99mTc(CO)3(MN-TZ-BPA)]+ accumulated in the tumor with certain initial uptake while poor retention. The rapid clearance from normal organs with favorable
tumor/muscle ratios warrants further research to improve tumor targeting efficacy and pharmacokinetic profile of radiolabeled
nitroimidazoles by structural modification. |
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