Article (Scientific journals)
Lanthanide complexes on Ag nanoparticles: Designing contrast agents for magnetic resonance imaging
Siddiqui, T.S.; Jani, A.; Williams, F. et al.
2009In Journal of Colloid and Interface Science, 337 (1), p. 88-96
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Abstract :
[en] This paper describes colloidal particles that are designed to induce hyper-intensity contrast (T-1 relaxation) in MRI. The contrast agents consist of discrete gadolinium complexes tethered to 10 rim diameter silver nanoparticles. The gadolinium complexes (1) [Gd(DTPA-bisamido cysteine)](2-) and (2) [Gd(cystine-NTA)(2)](3-), undergo chemisorption to particle Surfaces through thiol or disulfide groups, respectively, to form two new contrast agents. The resulting nanoparticulate constructs are characterized on the basis of their syntheses, composition, spectra and contrast enhancing power. The average r(1) relaxivities of the of the Surface bound complexes (obtained at 9.4 T and 25 degrees C) are 10.7 and 9.7 s(-1) mM(-1), respectively, as compared to 4.7 s(-1) mM(-1) for the clinical agent Magnevist(TM). Correspondingly, the respective whole particle relaxivities are 27927 and 13153 s(-1) mM(-1). (C) 2009 Elsevier Inc. All rights reserved.
Disciplines :
Radiology, nuclear medicine & imaging
Chemistry
Author, co-author :
Siddiqui, T.S.
Jani, A.
Williams, F.
Muller, Robert ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale
Vander Elst, Luce ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale
Laurent, Sophie  ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale
Yao, F.
Wadghiri, Y.Z.
Walters, M.A.
Language :
English
Title :
Lanthanide complexes on Ag nanoparticles: Designing contrast agents for magnetic resonance imaging
Publication date :
01 January 2009
Journal title :
Journal of Colloid and Interface Science
ISSN :
0021-9797
eISSN :
1095-7103
Publisher :
Elsevier, Atlanta, United States - Florida
Volume :
337
Issue :
1
Pages :
88-96
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
M108 - Chimie générale, organique et biomédicale
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