Py-Macrodipa: A Janus Chelator Capable of Binding Medicinally Relevant Rare-Earth Radiometals of Disparate Sizes.
Py-Macrodipa: A Janus Chelator Capable of Binding Medicinally Relevant Rare-Earth Radiometals of Disparate Sizes.
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DOI:
10.1021/jacs.1c05339
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发表时间:
2021-07-14
影响因子:
15
通讯作者:
Wilson JJ
中科院分区:
文献类型:
--
作者:
Hu A;Aluicio-Sarduy E;Brown V;MacMillan SN;Becker KV;Barnhart TE;Radchenko V;Ramogida CF;Engle JW;Wilson JJ
Nuclear medicine leverages different types of radiometals for disease diagnosis and treatment, but these applications usually require them to be stably chelated. Given the often-disparate chemical properties of these radionuclides, it is challenging to find a single chelator that binds all of them effectively. Towards addressing this problem, we recently reported a macrocyclic chelator macrodipa with an unprecedented “dual-size-selectivity” pattern for lanthanide (Ln3+) ions, characterized by its high affinity for both the large and the small Ln3+ (J. Am. Chem. Soc. 2020, 142, 13500). Here, we describe a second-generation “macrodipa-type” ligand, py-macrodipa. Its coordination chemistry with Ln3+ was thoroughly investigated experimentally and computationally. These studies reveal that the Ln3+−py-macrodipa complexes exhibit enhanced thermodynamic and kinetic stabilities compared to Ln3+−macrodipa, while retaining the unusual dual-size selectivity. Nuclear medicine applications of py-macrodipa for chelating radiometals with disparate chemical properties were assessed using the therapeutic 135La3+ and diagnostic 44Sc3+, radiometals representing the two size extremes within the Ln3+ series. Radiolabeling and stability studies demonstrate that the rapidly formed complexes of these radionuclides with py-macrodipa are highly stable in human serum. Thus, in contrast to gold standard chelators like DOTA and macropa, py-macrodipa can be harnessed for the simultaneous, efficient binding of radiometals with disparate ionic radii like La3+ and Sc3+, signifying a substantial achievement in nuclear medicine. This concept could enable the facile incorporation of a breadth of medicinally relevant radiometals into chemically identical radiopharmaceutical agents. The fundamental coordination chemistry learned from py-macrodipa provides valuable insight for future chelator developments.
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DOI:
10.1007/bf00528565
发表时间:
1989-02-01
期刊:
THEORETICA CHIMICA ACTA
影响因子:
--
作者:
DOLG, M;STOLL, H;PREUSS, H
通讯作者:
PREUSS, H
影响因子:
1.6
作者:
Aluicio-Sarduy, Eduardo;Hernandez, Reinier;Engle, Jonathan W.
通讯作者:
Engle, Jonathan W.
影响因子:
6.1
作者:
Gans, P;O'Sullivan, B
通讯作者:
O'Sullivan, B
影响因子:
4.6
作者:
Aluicio-Sarduy, Eduardo;Hernandez, Reinier;Engle, Jonathan W.
通讯作者:
Engle, Jonathan W.
影响因子:
3.1
作者:
Abel, E. P.;Clause, H. K.;Severin, G. W.
通讯作者:
Severin, G. W.