Paramagnetic Polynuclear Metal Complex Having High Self-Relaxation Rate, Preparation Method Thereof, and Contrast Medium Containing Same
申请人:Kim Tae Jeong
公开号:US20120226048A1
公开(公告)日:2012-09-06
The present invention relates to a paramagnetic polynuclear metal complex having enhanced self-relaxation rate and thermodynamic stability, and more particularly, to a synthetic method of a novel DTPA-bis-amide-histidine ligand and DTPA-bis-amide-aspartic acid ligand, a novel gadolinium complex ([Gd(L)H
2
O]) using the ligand, and a paramagnetic polynuclear metal complex using the gadolinium complex. The paramagnetic polynuclear metal complex is able to fix three or more metals (one gadolinium and two metal ions), thereby providing more excellent self-relaxation rate than the commercially available contrast agents. Thus, it can be widely applied to an MRI contrast agent because of meeting the high self-relaxation rate required as a contrast agent of magnetic resonance imaging (MRI).
Heteronuclear Gd-<sup>99m</sup>Tc Complex of DTPA-Bis(histidylamide) Conjugate as a Bimodal MR/SPECT Imaging Probe
作者:Ji-Ae Park、Jung Young Kim、Hee-Kyung Kim、Wonho Lee、Sang Moo Lim、Yongmin Chang、Tae-Jeong Kim、Kyeong Min Kim
DOI:10.1021/ml200285p
日期:2012.4.12
the synthesis and in vivo application of heterotrimetallic complexes of the type Gd(H2O)[(M(H2O)(CO)3)2(1)]} 1 = DTPA-bis(histidyl-amide); M = Re (3a); (99m)Tc (3b)} for dual modality MR/SPECT imaging. Here, the DTPA-bis(histidylamide) conjugate functions as a trinucleating chelate incorporating Gd in the DTPA core with Re or (99m)Tc in the pair of histidylamide side arms. The two complexes are chemically