Technetium-99m radiolabelling of anN-amino-alkyl-benzamide nitrido- and oxo-technetium bis(aminoethanethiol) derivative synthesis and biological results. Potential melanoma tracer agents

International audienceN-(2-diethylaminoethyl)-4-iodobenzamide has been reported to be an excellent agent for malignant melanoma diagnosis by SPECT. To obtain a 99mTc analog, we synthesized a new bis(aminothiol) (BAT) derivative. The benzamide function was conjugated onto a nitrogen of the BAT backbone. This ligand was successfully radiolabelled with both nitrido-technetium and oxo-technetium cores. These complexes were purified by HPLC. Tumour uptake was measured in intravenously injected mice bearing the B16 murine melanoma