Tissue distribution properties of technetium-99m-diamide-dimercaptide complexes and potential use as renal radiopharmaceuticals
作者:Sudhakar Kasina、Alan R. Fritzberg、Dennis L. Johnson、Dennis Eshima
DOI:10.1021/jm00160a023
日期:1986.10
Chelation with 99mTc resulted in single radiochemical products or the expected numbers of stereoisomers. They were purified by high-performance liquid chromatography (HPLC) and evaluated in mice as potential renal tubular function agents. The in vivo properties were sensitive to the presence of functional groups, the positional isomerism of the carboxylate group functionality, and the chelate ring stereochemistry
合成了一系列新的配体和基于二酰胺二巯基供体基团的99 99m螯合物,作为99 99m 1,2-双(2-硫代乙酰胺基)乙烷的衍生物,该复合物显示可通过肾小管分泌而排泄。与99mTc螯合可产生单一放射化学产物或预期数量的立体异构体。它们通过高效液相色谱(HPLC)纯化,并在小鼠中评估为潜在的肾小管功能药物。体内性质对官能团的存在,羧酸酯基团官能团的位置异构以及配体的螯合环立体化学敏感。甲基的存在减慢了肾脏的运输,降低了肾脏的特异性。与中心螯合环的乙烯桥稠合的环己基环减少了肾脏排泄,而芳香环则基本消除了肾脏排泄。观察到缓慢的肝胆清除率是另一种排泄方式。极性基团(例如羟基,羧酸根和羧酰胺)以立体化学依赖性方式增加了肾脏排泄率和特异性。鉴定出1,3-双(2-硫代乙酰胺基)-2-羟基丙烷,3,4-双(2-硫代乙酰胺基)丁酸酯和1,8-二巯基-2,7-二氧代-3,6-二氮杂壬酸酯的99mTc螯合物为有希