Ontology highlight
ABSTRACT:
SUBMITTER: Cai J
PROVIDER: S-EPMC2657879 | biostudies-literature | 2009 Feb
REPOSITORIES: biostudies-literature
Cai Jianfeng J Shapiro Erik M EM Hamilton Andrew D AD
Bioconjugate chemistry 20090201 2
We report the preparation and magnetic resonance (MR) characterization of new MRI contrast agents based on gadolinium complexes conjugated to a self-assembling DNA quadruplex scaffold. As a single gadolinium-DOTA chelated DNA strand, the r(1) molar relaxivity is 6.4 mM(-1) s(-1) per Gd and increases to 11.7 mM(-1) s(-1) per Gd upon formation of a DNA quadruplex. Similar results were obtained when a gadolinium-DOTA dendrimer was conjugated to DNA, with the r(1) molar relaxivity increasing to 12.9 ...[more]