Imaging agents;
Macrocyclic ligands;
Gadolinium;
Relaxivity;
Gd-DOTA;
ALKALINE-EARTH METAL;
FAST WATER EXCHANGE;
COMPLEXES;
GADOLINIUM;
RELAXIVITY;
DESIGN;
SENSITIVITY;
MODULATION;
STABILITY;
LIGANDS;
D O I:
10.1016/j.tet.2014.06.126
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
In the present work a modular pathway towards the synthesis of a new versatile MRI contrast agent is reported and its physico-chemical properties are described. Two different functional groups were attached on two arms of the gadolinium 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate (DOTA) in order to get a platform able to bind one probe designed to target specific biological marker and a fluorescent molecule likely to be used for optical imaging. The nuclear magnetic relaxation dispersion (NMRD) profile, the oxygen-17 relaxometric NMR study and stability assessment versus transmetalation of the Gd-complex show that this new contrast agent has a relaxivity and transmetalation stability similar to Gd-DOTA. (C) 2014 Elsevier Ltd. All rights reserved.
机构:
Massachusetts Gen Hosp, AA Martinos Ctr Biomed Imaging, Charlestown, MA 02129 USA
Harvard Univ, Sch Med, Charlestown, MA 02129 USAMassachusetts Gen Hosp, AA Martinos Ctr Biomed Imaging, Charlestown, MA 02129 USA
机构:
Massachusetts Gen Hosp, AA Martinos Ctr Biomed Imaging, Charlestown, MA 02129 USA
Harvard Univ, Sch Med, Charlestown, MA 02129 USAMassachusetts Gen Hosp, AA Martinos Ctr Biomed Imaging, Charlestown, MA 02129 USA