申请人:Nihon Medi-Physics Co., Ltd.
公开号:EP1323433A1
公开(公告)日:2003-07-02
Provided is a composition for preventing urinary calculi caused by metal ions liberated from a compound containing a lanthanoid metal or another heavy metal in image diagnosis or therapy using that compound. The composition is a urinary calculus preventing composition containing a multidentate ligand capable of forming a complex with lanthanoid metal ions or other heavy metal ions, or an alkaline earth metal complex of that ligand. The multidentate ligand can be a bifunctional ligand having a polyaminopolycarboxylic acid, polyaminopolyphosphonic acid or the like as its site for forming a complex with a metal and chemically bonded to a physiologically acceptable oligosaccharide or the like, or can also be a polyaminopolycarboxylic or polyaminopolyphosphonic acid per se. Preferably, the polyaminopolycarboxylic acid is EDTA, DTPA, DOTA or TETA, or a derivative thereof.
本发明提供了一种组合物,用于在使用含有镧系金属或其他重金属的化合物进行图像诊断或治疗时,防止从该化合物中释放出的金属离子引起尿结石。该组合物是一种防止尿结石的组合物,含有能够与镧系金属离子或其他重金属离子形成络合物的多叉配体,或该配体的碱土金属络合物。多叉配体可以是以多氨基多羧酸、多氨基多膦酸等作为与金属形成络合物的位点,并与生理上可接受的寡糖等化学键合的双功能配体,也可以是多氨基多羧酸或多氨基多膦酸本身。聚氨基多羧酸最好是 EDTA、DTPA、DOTA 或 TETA 或其衍生物。