Comparison of phosphonate, hydroxypropyl and carboxylate pendants in Fe(III) macrocyclic complexes as MRI contrast agents.
Comparison of phosphonate, hydroxypropyl and carboxylate pendants in Fe(III) macrocyclic complexes as MRI contrast agents.
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DOI:
10.1016/j.jinorgbio.2021.111594
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发表时间:
2021-12
影响因子:
3.9
通讯作者:
Morrow, Janet R.
中科院分区:
文献类型:
--
作者:
Kras, Elizabeth A.;Abozeid, Samira M.;Eduardo, Waldine;Spernyak, Joseph A.;Morrow, Janet R.
Fe(III) macrocyclic complexes containing a macrocycle and three pendant groups including phosphonate (NOTP =1,4,7-triazacyclononane-1,4,7-triyl-tris(methylenephosphonic acid), carboxylate (NOTA = 1,4,7 - triazacyclononane - N,N',N" – triacetate) or hydroxypropyl (NOHP =(2S,2'S,2”S)−1,1',1”-(1,4,7-triazonane-1,4,7-triyl)tris(propan-2-ol) ) were studied in order to compare the effect of these donor groups on solution chemistry and water proton relaxivity. All three complexes, Fe(NOTP), Fe(NOHP) and Fe(NOTA), display a large degree of kinetic inertness to dissociation in the presence of phosphate and carbonate, under acidic conditions of 100 mM HCl or 1 M HCl or to trans-metalation with Zn(II). The r1 proton relaxivity of the complexes at 1.4 T, 33 °C is compared over the pH range of 1 to 10. At pH 7.4, 33 °C, 1.4 T, Fe(NOHP) has the largest relaxivity (1.5 mM−1s−1), Fe(NOTP) is second at 1.0 mM−1s−1, whereas Fe(NOTA) is the lowest at 0.61 mM−1s−1. Fe(NOTP), Fe(NOHP) and Fe(NOTA) all show an increase in relaxivity at very acidic pH values (< 3) that is consistent with an acid-catalyzed process. Variable temperature 17O NMR studies at near neutral pH are consistent with the absence of an inner-sphere water molecule for Fe(NOTP) and Fe(NOHP), supporting second-sphere or outer-sphere water contributions to proton relaxation. Fe(NOTP) shows contrast enhancement in T1 weighted MRI studies in mice and clears through a renal pathway.
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影响因子:
4.6
作者:
Asik, Didar;Smolinski, Rachel;Morrow, Janet R.
通讯作者:
Morrow, Janet R.
影响因子:
4.6
作者:
Gupta A;Caravan P;Price WS;Platas-Iglesias C;Gale EM
通讯作者:
Gale EM
DOI:
10.1039/c4dt02958e
发表时间:
2015-03-21
期刊:
Dalton transactions (Cambridge, England : 2003)
影响因子:
--
作者:
Boros E;Gale EM;Caravan P
通讯作者:
Caravan P
影响因子:
3.3
作者:
Damme, Nikolas M.;Fernandez, Diego P.;Morton, Kathryn A.
通讯作者:
Morton, Kathryn A.
影响因子:
2.8
作者:
CLARKE, ET;MARTELL, AE
通讯作者:
MARTELL, AE