Preparation and in vitro evaluation of a novel amphiphilic GdPCTA-[12] derivative; a micellar MRI contrast agent
作者:Ragnar Hovland、Christian Gløgård、Arne J. Aasen、Jo Klaveness
DOI:10.1039/b211039c
日期:2003.2.11
concentration dependent T1-relaxivity (r1) of the system has been described. The maximum T1-relaxivity, 29.2 s-1 mM-1 (20 MHz, 25 degrees C), was higher than for previously described micellar MRI contrast agents. This high T1-relaxivity is a consequence of the favourable water residence time (tau M) and the fact that the complex is heptadentate allowing two water molecules to coordinate to the gadolinium
制备了一种新型的两亲性GdPCTA- [12]衍生物。该复合物在水溶液中以相对较低的CMC(0.15 mM(25摄氏度))形成胶束。已经描述了系统的依赖于浓度的T1-松弛度(r1)。最大T1松弛度为29.2 s-1 mM-1(20 MHz,25摄氏度),高于先前描述的胶束MRI造影剂。较高的T1弛豫性是水滞留时间(tau M)有利的结果,并且配合物是七齿的,允许两个水分子与the离子配位(q = 2)。