Critical In Vitro Evaluation of Responsive MRI Contrast Agents for Calcium and Zinc
作者:Anurag Mishra、Nikos K. Logothetis、David Parker
DOI:10.1002/chem.201001548
日期:2011.2.1
binding were sensitive to the presence of added bicarbonate, and were 450 μM (Ca2+) and 200 μM (Zn2+) in serum. Such systems may, therefore, be considered for use as magnetic resonance imaging (MRI) contrast agents to track the restoration of changes in metal‐ion concentration in the cerebrospinal fluid of the brain, following neural stimulation.
据报道,在添加的Ca 2+或Zn 2+离子存在下,两种exhibit(III)配合物的合成显示出质子弛豫性的提高。金属离子结合后,配合物的水合状态从零增加到一种,这是通过对相应Eu III配合物的光谱测量证实的。在每种情况下,在1.4 T和310 K的磁场下,在小鼠血清中观察到的松弛度调节幅度为30–40%。对于CA的解离常数2+和Zn 2+结合到分别加入碳酸氢盐的存在敏感,并且是450μ中号(CA 2+)和200μ中号(锌2+)。因此,可以考虑将这种系统用作磁共振成像(MRI)造影剂,以跟踪神经刺激后大脑脑脊液中金属离子浓度的恢复情况。