A gadolinium(III) complex with 8-amidequinoline based ligand as copper(II) ion responsive contrast agent
作者:Wei-Sheng Li、Jian Luo、Zhong-Ning Chen
DOI:10.1039/c0dt01141j
日期:——
from 4.27 mM−1 s−1 to 7.29 mM−1 s−1 in response to equimolar amounts of copper(II) ion, corresponding to ca. 71% relaxivity enhancement. Distinct changes in relaxivity were undetected upon addition of physiologically relevant alkali metal cations (K+ or Na+), alkaline earth metal cations (Mg2+ or Ca2+), or d-block metal cations (Zn2+, Cu+, Fe2+, Fe3+), indicating a high selectivity for Cu2+ over other
合成并表征了一种新型的具有喹啉基配体的Cu 2+反应性MRI造影剂(Gd-QDOTAMA)。对Gd-QDOTAMA的弛豫性研究表明,响应于等摩尔量的铜(II)离子,弛豫率从4.27 mM -1 s -1增加到7.29 mM -1 s -1,对应于。71%的松弛度增强。加入生理相关的碱金属阳离子(K +或Na +),碱土金属阳离子(Mg 2+或Ca 2+)或d嵌段金属阳离子(Zn 2 +,Cu +,铁2+,Fe 3+),表明对Cu 2+的选择性高于其他生物学相关的金属离子。此外,还研究了生理水平上常见的生物阴离子对Cu 2+响应型造影剂的影响。关于Eu的Eu-QDOTAMA的发光研究表明,响应于Cu 2 +,Gd-QDOTAMA的弛豫性增强最可能是由于内球数量增加水Cu 2+结合到8-酰胺喹啉部分后,Gd 3+周围的分子。Gd-QDOTAMA的体外T 1加权幻影图像证实,通过添加等摩尔量的Cu