Synthesis and preliminary biological evaluation of the 99mTc labeled nitrobenzoimidazole and nitrotriazole as tumor hypoxia markers
摘要:
1-(3-1 2,4-Nitrotriazole-1-yl)-propanhydroxyiminoamide and 1-(6-nitrobenzoimidazole-1-yl)-propanhydroxyiminoamide were synthesized and radiolabeled with Tc-99m. The Tc-99m labeled complexes continuously accumulated in hypoxic marine sarcoma S180 cells in vitro but not in aerobic cells. Biodistribution results in mice bearing S180 tumor indicated that the tracers could localize in tumor and eliminate from it slowly. These results suggested that the Tc-99m labeled nitrobenzoimidazole and nitrotriazole might be the novel tumor hypoxia markers. (C) 2006 Elsevier Ltd. All rights reserved.