Synthesis and Relaxometric Characterization of a MRI Gd-Based Probe Responsive to Glutamic Acid Decarboxylase Enzymatic Activity
作者:Roberta Napolitano、Giorgio Pariani、Franco Fedeli、Zsolt Baranyai、Markus Aswendt、Silvio Aime、Eliana Gianolio
DOI:10.1021/jm301831f
日期:2013.3.28
importance for the fast developing field of molecular magnetic resonance imaging (MRI). We report here the synthesis and in vitro validation of a Gd(III)-based contrast agent designed to act as an MRI responsive probe for imaging the activity of the enzyme glutamic acid decarboxylase (GAD) present in neurons. Upon the action of the enzyme, the Gd(III) complex increases its hydration sphere and takes on a residual
选择性地可视化特定细胞(例如大脑中的神经元)的新型基于造影剂的系统对于快速发展的分子磁共振成像(MRI)领域将具有重要意义。我们在这里报告了基于Gd(III)的造影剂的合成和体外验证,该造影剂旨在充当MRI响应探针,用于成像神经元中存在的谷氨酸脱羧酶(GAD)的活性。在酶的作用下,Gd(III)配合物增加了其水合范围,并带有残留的正电荷,从而促进了其与内源性大分子的结合。两种作用均以协同方式产生明显的松弛增强作用,其直接报告酶活性,并允许选择性地在体外和体内检测GAD阳性细胞的活性。