Gadolinium DO3A derivatives mimicking phospholipids; preparation and in vitro evaluation as pH responsive MRI contrast agents
作者:Ragnar Hovland、Christian Gløgård、Arne J. Aasen、Jo Klaveness
DOI:10.1039/b100405k
日期:——
A series of Gd-DO3A derivatives (8a–d) mimicking phospholipids have been prepared. Two of the complexes, Gd-HADB-DO3A (8a) and Gd-HADO-DO3A (8b), have been evaluated as pH responsive MRI contrast agents in vitro. The T1-relaxivity (r1) of Gd-HADO-DO3A (8b) increased 142% on changing the pH from 6 to 8. The pH dependence is thought to arise from the formation of supramolecular structures caused by deprotonation
已经制备了一系列模仿磷脂的Gd-DO3A衍生物(8a – d)。Gd-HADB-DO3A(8a)和Gd-HADO-DO3A(8b)中的两种复合物已在体外评估为pH响应MRI造影剂。pH值从6变为8时,Gd-HADO-DO3A(8b)的T 1弛豫度(r 1)增加142%。pH依赖性被认为是由于两亲性复合物的去质子化而形成的超分子结构所致。在碱性pH下。