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Harriswangler C, Lucio-Martínez F, Rodríguez-Rodríguez A, Esteban-Gómez D, Platas-Iglesias C. Unravelling the 6sp ← 6s absorption spectra of Bi(III) complexes. Dalton Trans 2024; 53:2275-2285. [PMID: 38197124 DOI: 10.1039/d3dt03744d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
We report a spectroscopic and computational study that investigates the absorption spectra of Bi(III) complexes, which often show an absorption band in the UV region (∼270-350 nm) due to 6sp ← 6s transitions. We investigated the spectra of three simple complexes, [BiCl5]2-, [BiCl6]3- and [Bi(DMSO)8]3+, which show absorption maxima at 334, 326 and 279 nm due to 3P1 ← 1S0 transitions. Theoretical calculations based on quasi-degenerate N-electron valence perturbation theory to second order (QD-NEVPT2) provide an accurate description of the absorption spectra when employing CAS(2,9) wave functions. We next investigated the absorption spectra of the [Bi(NOTA)] complex (H3NOTA = 1,4,7-triazacyclononane-1,4,7-triacetic acid), which forms ternary complexes [Bi(NOTA)X]- (X = Cl, Br or I) in the presence of excess halide in aqueous solutions. Halide binding has an important impact on the position of the 3P1 ← 1S0 transition, which shifts progressively to longer wavelengths from 282 nm ([Bi(NOTA)]) to 298 nm (X = Cl), 305 nm (X = Br) and 325 nm (X = I). Subsequent QD-NEVPT2 calculations indicate that this effect is related to the progressive stabilization of the spin-orbit free states associated with the 6s16p1 configuration on increasing the covalent character of the metal-ligand(s) bonds, rather than with significant differences in spin-orbit coupling (SOC). These studies provide valuable insight into the coordination chemistry of Bi(III), an ion with increasing interest in targeted alpha therapy due to the possible application of bismuth isotopes bismuth-212 (212Bi, t1/2 = 60.6 min) and bismuth-213 (213Bi, t1/2 = 45.6 min).
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Affiliation(s)
- Charlene Harriswangler
- Universidade da Coruña, Centro de Interdisciplinar de Química e Bioloxía (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - Fátima Lucio-Martínez
- Universidade da Coruña, Centro de Interdisciplinar de Química e Bioloxía (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - Aurora Rodríguez-Rodríguez
- Universidade da Coruña, Centro de Interdisciplinar de Química e Bioloxía (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - David Esteban-Gómez
- Universidade da Coruña, Centro de Interdisciplinar de Química e Bioloxía (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Interdisciplinar de Química e Bioloxía (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
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2
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Kovács A. Metal-Ligand Interactions in Scandium Complexes with Radiopharmaceutical Applications. Inorg Chem 2023; 62:20733-20744. [PMID: 37949439 PMCID: PMC10731654 DOI: 10.1021/acs.inorgchem.3c02211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Indexed: 11/12/2023]
Abstract
The radioisotopes of scandium (43Sc, 44Sc, and 47Sc) are potential candidates for use in imaging and therapy both separately and as elementally matched pairs for radiotheranostics. In the present study the bonding interactions of Sc3+ with 18 hepta- to decadentate ligands are compared using density functional theory (DFT) calculations. The bonding analysis is based on the natural bond orbital (NBO) model. The main contributions to the bonding were assessed using natural energy decomposition analysis (NEDA). Most of the ligands have anionic character (charges from 2- to 8-); thus the electrical term determines the major differences in the interaction energies. However, interesting features were found in the covalent contributions manifested by the ligand → Sc3+ charge transfer (CT) interactions. Significant differences could be observed in the energetic contributions of the N and O donors to the total CT.
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Affiliation(s)
- Attila Kovács
- European Commission, Joint
Research Centre (JRC), Karlsruhe, Germany
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3
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Bhattarai A, Lok JGT, Sun H, Vardhanabhuti V. Computed Tomography of Cartilage: An Exploration of Novel Cationic Bismuth Contrast Agent. Ann Biomed Eng 2022; 51:977-986. [PMID: 36446911 DOI: 10.1007/s10439-022-03110-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 11/16/2022] [Indexed: 12/02/2022]
Abstract
Accurate diagnosis of minor cartilage injuries with delayed contrast-enhanced computed tomography (CECT) is challenging as poor diffusion and toxicity issues limit the usage of common CT contrast agents. Hence, the design of safe contrast agents with physiochemical properties suitable for fast, deep cartilage imaging is imminent. Herein, a novel cationic bismuth contrast agent (Bi-DOTAPXD) based on dodecane tetraacetic acid (DOTA) was synthesized and examined for CECT of cartilage. The complex was designed to improve diagnosis by utilising a net-positive charge for enhanced permeability through cartilage, inherent low-toxicity and high X-ray attenuation of bismuth. Osteochondral plugs (n = 12), excised from visually intact porcine articular cartilage were immersed in Bi-DOTAPXD (8 mg/mL) and Gd-DOTAPXD (10 mg/mL) contrast agents and scanned with a high-resolution microcomputed tomography scanner at multiple time-points. The mean Bi-DOTAPXD and Gd-DOTAPXD partitions at 45-min time-point were 85.7 ± 35.1 and 69.8 ± 30.2%, and the partitions correlated with the histopathological analysis of cartilage proteoglycan (PG) content (r) at 0.657 and 0.632, respectively. The time diffusion constants (τ) for Bi-DOTAPXD and Gd-DOTA were 121 and 159 min, respectively. Diffusion Bi-DOTAPXD and Gd-DOTAPXD reflected inter-sample variation in cartilage PG content. Cationic Bi-DOTAPXD may have the potential as a CT agent for the diagnosis of cartilage.
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Matazova EV, Egorova BV, Zubenko AD, Pashanova AV, Fedorova OA, Kalmykov SN. Thermodynamic and Kinetic Features of Bi
3+
Complexes with the Azamacrocycles H
4
BATA and H
4
DOTA. ChemistrySelect 2022. [DOI: 10.1002/slct.202203108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Ekaterina V. Matazova
- Chemistry Department Lomonosov Moscow State University 119991 Leninskie Gory, 1/3 Moscow Russian Federation
| | - Bayirta V. Egorova
- Chemistry Department Lomonosov Moscow State University 119991 Leninskie Gory, 1/3 Moscow Russian Federation
| | - Anastasia D. Zubenko
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences 119991 Vavilova, 28, GSP-1 Moscow Russian Federation
| | - Anna V. Pashanova
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences 119991 Vavilova, 28, GSP-1 Moscow Russian Federation
| | - Olga A. Fedorova
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences 119991 Vavilova, 28, GSP-1 Moscow Russian Federation
- Mendeleev University of Chemistry and Technology of Russia 125047 Miusskaya sqr., 9 Moscow Russian Federation
| | - Stepan N. Kalmykov
- Chemistry Department Lomonosov Moscow State University 119991 Leninskie Gory, 1/3 Moscow Russian Federation
- Frumkin Institute of Physical chemistry and Electrochemistry Russian academy of sciences (IPCE RAS) 119071 Leninsky prospect, 31, bld.4 Moscow Russian Federation
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5
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Theoretical Study of Complexes of Tetravalent Actinides with DOTA. Symmetry (Basel) 2022. [DOI: 10.3390/sym14112451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
1,4,7,10-Tetraazacyclododecane-N,N′,N″,N‴-tetraacetic acid (H4DOTA) is a prominent chelating ligand with potential applications in various fields, from radiotherapy to the separation of fission products. The present study explores the stability, structure, and bonding properties of its complexes with tetravalent actinides (An = Th, U, Np, Pu) using density functional theory and relativistic multireference calculations. Neutral complexes prefer to form symmetric (C4) structures with DOTA. The first coordination sphere of the actinide ions is readily saturated by a weakly bonded H2O ligand. The latter ligand reduces the molecular symmetry while exerting only marginal effects on the properties of the parent complex. An-ligand bonding is mainly electrostatic, but there are also significant charge-transfer contributions from DOTA to the An 6d/5f orbitals. The charge-transfer interactions and the covalent character of bonding increase gradually in the order of Th < U < Np < Pu, as indicated by analysis of the electron density distribution using the Quantum Theory of Atoms in Molecules.
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6
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Franchi S, Di Marco V, Tosato M. Bismuth chelation for targeted alpha therapy: Current state of the art. Nucl Med Biol 2022; 114-115:168-188. [PMID: 35753940 DOI: 10.1016/j.nucmedbio.2022.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 05/22/2022] [Accepted: 06/14/2022] [Indexed: 12/27/2022]
Abstract
Current interest in the α-emitting bismuth radionuclides, bismuth-212 (212Bi) and bismuth-213 (213Bi), stems from their great potential for targeted alpha therapy (TAT), an expanding and promising approach for the treatment of micrometastatic disease and the eradication of single malignant cells. To selectively deliver their emission to the cancer cells, these radiometals must be firmly coordinated by a bifunctional chelator (BFC) attached to a tumour-seeking vector. This review provides a comprehensive overview of the current state-of-the-art chelating agents for bismuth radioisotopes. Several aspects are reported, from their 'cold' chelation chemistry (thermodynamic, kinetic, and structural properties) and radiolabelling investigations to the preclinical and clinical studies performed with a variety of bioconjugates. The aim of this review is to provide both a guide for the rational design of novel optimal platforms for the chelation of these attractive α-emitters and emphasize the prospects of the most encouraging chelating agents proposed so far.
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Affiliation(s)
- Sara Franchi
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Valerio Di Marco
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Marianna Tosato
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
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McNeil BL, Kadassery KJ, McDonagh AW, Zhou W, Schaffer P, Wilson JJ, Ramogida CF. Evaluation of the Effect of Macrocyclic Ring Size on [ 203Pb]Pb(II) Complex Stability in Pyridyl-Containing Chelators. Inorg Chem 2022; 61:9638-9649. [PMID: 35704752 DOI: 10.1021/acs.inorgchem.2c01114] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
As an element-equivalent theranostic pair, lead-203 (203Pb, 100% EC, half-life = 51.92 h) and lead-212 (212Pb, 100% β-, half-life = 10.64 h), through the emission of γ rays and an α particle in its decay chain, respectively, can aid in the development of personalized targeted radionuclide treatment for advanced and currently untreatable cancers. With these isotopes currently being used in clinical trials, an understanding of the relationship between the chelator structure, ability to incorporate the radiometal, and metal-complex stability is needed to help design appropriate chelators for clinical use. Herein, we report an investigation into the effect of ring size in macrocyclic chelators where pyridine, an intermediate Lewis base, acts as an electron donor toward lead. Crown-4Py (4,7,13,16-tetrakis(pyridin-2-ylmethyl)-1,10-dioxa-4,7,13,16-tetraazacyclooctadecane), cyclen-4Py (1,4,7,10-tetrakis(pyridin-2-ylmethyl)-1,4,7,10-tetraazacyclododecane), and NOON-2Py (7,16-bis(pyridin-2-ylmethyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane) were synthesized and analyzed for their ability to coordinate Pb2+. Metal complex stability was investigated via [203Pb]Pb2+ radiolabeling studies, 1H NMR spectroscopy, X-ray crystallography, and potentiometry. With the smallest macrocyclic backbone, cyclen-4Py had the highest radiochemical yield, while, in descending order, crown-4Py and NOON-2Py had the lowest. Thermodynamic stability constants (log KML) of 19.95(3), 13.29(5), and 11.67 for [Pb(Cyclen-4Py)]2+, [Pb(Crown-4Py)]2+, and [Pb(NOON-2Py)]2+, respectively, correlated with their radiochemical yields. The X-ray crystal structure of the least stable complexes [Pb(NOON-2Py)]2+ revealed a hemidirected Pb2+ center, as reflected by a void within the coordination sphere, and [Pb(Crown-4Py)]2+ showed an average Pb-N pyridine interatomic distance of >3 Å. By contrast, the crystal structure of [Pb(Cyclen-4Py)]2+ showed shorter Pb-N pyridine interactions, and in solution, only one highly symmetric isomer existed for this complex, whereas conformational flexibility was observed for both [Pb(Crown-4Py)]2+ and [Pb(NOON-2Py)]2+ at the NMR timescale. This study illustrates the importance of the macrocyclic backbone size when incorporating bulky electron-donor groups into the design of a macrocyclic chelator as it affects the accessibility of lead to the donor arms. Our results show that cyclen-4Py is a promising chelator for future studies with this theranostic pair.
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Affiliation(s)
- Brooke L McNeil
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.,Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - Karthika J Kadassery
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca New York, 14853-1301 United States
| | - Anthony W McDonagh
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Wen Zhou
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Paul Schaffer
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.,Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.,Department of Radiology, The University of British Columbia, Vancouver, British Columbia V5Z 1M9, Canada
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca New York, 14853-1301 United States
| | - Caterina F Ramogida
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.,Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
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Kadassery KJ, King AP, Fayn S, Baidoo KE, MacMillan SN, Escorcia FE, Wilson JJ. H 2BZmacropa-NCS: A Bifunctional Chelator for Actinium-225 Targeted Alpha Therapy. Bioconjug Chem 2022; 33:1222-1231. [PMID: 35670495 PMCID: PMC9362842 DOI: 10.1021/acs.bioconjchem.2c00190] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Actinium-225 (225Ac) is one of the most promising radionuclides for targeted alpha therapy (TAT). With a half-life of 9.92 days and a decay chain that emits four high-energy α particles, 225Ac is well-suited for TAT when conjugated to macromolecular targeting vectors that exhibit extended in vivo circulation times. The implementation of 225Ac in these targeted constructs, however, requires a suitable chelator that can bind and retain this radionuclide in vivo. Previous work has demonstrated the suitability of a diaza-18-crown-6 macrocyclic chelator H2macropa for this application. Building upon these prior efforts, in this study, two rigid variants of H2macropa, which contain either one (H2BZmacropa) or two (H2BZ2macropa) benzene rings within the macrocyclic core, were synthesized and investigated for their potential use for 225Ac TAT. The coordination chemistry of these ligands with La3+, used as a nonradioactive model for Ac3+, was carried out. Both NMR spectroscopic and X-ray crystallographic studies of the La3+ complexes of these ligands revealed similar structural features to those found for the related complex of H2macropa. Thermodynamic stability constants of the La3+ complexes, however, were found to be 1 and 2 orders of magnitude lower than those of H2macropa for H2BZmacropa and H2BZ2macropa, respectively. The decrease in thermodynamic stability was rationalized via the use of density functional theory calculations. 225Ac radiolabeling and serum stability studies with H2BZmacropa showed that this chelator compares favorably with H2macropa. Based on these promising results, a bifunctional version of this chelator, H2BZmacropa-NCS, was synthesized and conjugated to the antibody codrituzumab (GC33), which targets the liver cancer biomarker glypican-3 (GPC3). The resulting GC33-BZmacropa conjugate and an analogous GC33-macropa conjugate were evaluated for their 225Ac radiolabeling efficiencies, antigen-binding affinities, and in vivo biodistribution in HepG2 liver cancer tumor-bearing mice. Although both conjugates were comparably effective in their radiolabeling efficiencies, [225Ac]Ac-GC33-BZmacropa showed slightly poorer serum stability and biodistribution than [225Ac]Ac-GC33-macropa. Together, these results establish H2BZmacropa-NCS as a new bifunctional chelator for the preparation of 225Ac radiopharmaceuticals.
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Affiliation(s)
- Karthika J. Kadassery
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - A. Paden King
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Stanley Fayn
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Kwamena E. Baidoo
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Samantha N. MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Freddy E. Escorcia
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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9
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Egorova BV, Zamurueva LS, Zubenko AD, Pashanova AV, Mitrofanov AA, Priselkova AB, Fedorov YV, Trigub AL, Fedorova OA, Kalmykov SN. Novel Hybrid Benzoazacrown Ligand as a Chelator for Copper and Lead Cations: What Difference Does Pyridine Make. Molecules 2022; 27:3115. [PMID: 35630592 PMCID: PMC9143346 DOI: 10.3390/molecules27103115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 05/06/2022] [Indexed: 12/02/2022] Open
Abstract
A synthetic procedure for the synthesis of azacrown ethers with a combination of pendant arms has been developed and the synthesized ligand, characterized by various techniques, was studied. The prepared benzoazacrown ether with hybrid pendant arms and its complexes with copper and lead cations were studied in terms of biomedical applications. Similarly to a fully acetate analog, the new one binds both cations with close stability constants, despite the decrease in both constants. The calculated geometry of the complexes correlate with the data from X-ray absorption and NMR spectroscopy. Coordination of both cations differs due to the difference between the ionic radii. However, these chelation modes provide effective shielding of cations in both cases, that was shown by the stability of their complexes in the biologically relevant media towards transchelation and transmetallation.
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Affiliation(s)
- Bayirta V. Egorova
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1, 119991 Moscow, Russia; (L.S.Z.); (A.A.M.); (S.N.K.)
| | - Lyubov S. Zamurueva
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1, 119991 Moscow, Russia; (L.S.Z.); (A.A.M.); (S.N.K.)
| | - Anastasia D. Zubenko
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova, 28, GSP-1, 119991 Moscow, Russia; (A.D.Z.); (A.V.P.); (Y.V.F.)
| | - Anna V. Pashanova
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova, 28, GSP-1, 119991 Moscow, Russia; (A.D.Z.); (A.V.P.); (Y.V.F.)
- Higher Chemical College, Mendeleev University of Chemistry and Technology of Russia, Miusskaya Sqr., 9, 125047 Moscow, Russia
| | - Artem A. Mitrofanov
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1, 119991 Moscow, Russia; (L.S.Z.); (A.A.M.); (S.N.K.)
| | - Anna B. Priselkova
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie Gory, 1, 119991 Moscow, Russia;
| | - Yuri V. Fedorov
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova, 28, GSP-1, 119991 Moscow, Russia; (A.D.Z.); (A.V.P.); (Y.V.F.)
| | - Alexander L. Trigub
- National Research Center “Kurchatov Institute”, Akademika Kurchatova Sqr., 1, 123098 Moscow, Russia;
| | - Olga A. Fedorova
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova, 28, GSP-1, 119991 Moscow, Russia; (A.D.Z.); (A.V.P.); (Y.V.F.)
| | - Stepan N. Kalmykov
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1, 119991 Moscow, Russia; (L.S.Z.); (A.A.M.); (S.N.K.)
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10
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Design, synthesis, and preclinical evaluation of a novel bifunctional macrocyclic chelator for theranostics of cancers. Eur J Nucl Med Mol Imaging 2022; 49:2618-2633. [DOI: 10.1007/s00259-022-05750-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 03/01/2022] [Indexed: 12/22/2022]
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11
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Ali M, Latif A, Bibi S, Ali S, Ali A, Ahmad M, Ahmad R, Khan AA, Khan A, Ribeiro AI, Al‐Harrasi A, Farooq U. Facile Synthesis of the Shape‐Persistent 4‐Hydroxybenzaldehyde Based Macrocycles and Exploration of their Key Electronic Properties: An Experimental and DFT Approach. ChemistrySelect 2022. [DOI: 10.1002/slct.202102715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mumtaz Ali
- Department of Chemistry University of Malakand Lower 18800 Khyber Pakhtunkhwa Pakistan
| | - Abdul Latif
- Department of Chemistry University of Malakand Lower 18800 Khyber Pakhtunkhwa Pakistan
| | - Saeeda Bibi
- Department of Chemistry University of Malakand Lower 18800 Khyber Pakhtunkhwa Pakistan
| | - Sardar Ali
- Department of Chemistry University of Malakand Lower 18800 Khyber Pakhtunkhwa Pakistan
| | - Akbar Ali
- Department of Chemistry Government College University Faisalabad Faisalabad 38000 Pakistan
| | - Manzoor Ahmad
- Department of Chemistry University of Malakand Lower 18800 Khyber Pakhtunkhwa Pakistan
| | - Rashid Ahmad
- Department of Chemistry University of Malakand Lower 18800 Khyber Pakhtunkhwa Pakistan
- Center for Computational Materials Science University of Malakand Dir Lower
| | - Adnan Ali Khan
- Department of Chemistry University of Malakand Lower 18800 Khyber Pakhtunkhwa Pakistan
- Center for Computational Materials Science University of Malakand Dir Lower
| | - Ajmal Khan
- Natural and Medical Sciences Research Center University of Nizwa PO Box 33, 616 Birkat Al Mauz Nizwa Oman
| | - Alany Ingrid Ribeiro
- Department of Chemistry Federal University of São Carlos Rod. Washington Luís, Km 265 São Carlos Brazil
| | - Ahmed Al‐Harrasi
- Natural and Medical Sciences Research Center University of Nizwa PO Box 33, 616 Birkat Al Mauz Nizwa Oman
| | - Umar Farooq
- Department of Chemistry COMSATS University Islamabad Abbottabad Campus, KPK 22060 Islamabad 45550 Pakistan
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12
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Woods JJ, Unnerstall R, Hasson A, Abou DS, Radchenko V, Thorek DLJ, Wilson JJ. Stable Chelation of the Uranyl Ion by Acyclic Hexadentate Ligands: Potential Applications for 230U Targeted α-Therapy. Inorg Chem 2022; 61:3337-3350. [PMID: 35137587 PMCID: PMC9382226 DOI: 10.1021/acs.inorgchem.1c03972] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Uranium-230 is an α-emitting radionuclide with favorable properties for use in targeted α-therapy (TAT), a type of nuclear medicine that harnesses α particles to eradicate cancer cells. To successfully implement this radionuclide for TAT, a bifunctional chelator that can stably bind uranium in vivo is required. To address this need, we investigated the acyclic ligands H2dedpa, H2CHXdedpa, H2hox, and H2CHXhox as uranium chelators. The stability constants of these ligands with UO22+ were measured via spectrophotometric titrations, revealing log βML values that are greater than 18 and 26 for the "pa" and "hox" chelators, respectively, signifying that the resulting complexes are exceedingly stable. In addition, the UO22+ complexes were structurally characterized by NMR spectroscopy and X-ray crystallography. Crystallographic studies reveal that all six donor atoms of the four ligands span the equatorial plane of the UO22+ ion, giving rise to coordinatively saturated complexes that exclude solvent molecules. To further understand the enhanced thermodynamic stabilities of the "hox" chelators over the "pa" chelators, density functional theory (DFT) calculations were employed. The use of the quantum theory of atoms in molecules revealed that the extent of covalency between all four ligands and UO22+ was similar. Analysis of the DFT-computed ligand strain energy suggested that this factor was the major driving force for the higher thermodynamic stability of the "hox" ligands. To assess the suitability of these ligands for use with 230U TAT in vivo, their kinetic stabilities were probed by challenging the UO22+ complexes with the bone model hydroxyapatite (HAP) and human plasma. All four complexes were >95% stable in human plasma for 14 days, whereas in the presence of HAP, only the complexes of H2CHXdedpa and H2hox remained >80% intact over the same period. As a final validation of the suitability of these ligands for radiotherapy applications, the in vivo biodistribution of their UO22+ complexes was determined in mice in comparison to unchelated [UO2(NO3)2]. In contrast to [UO2(NO3)2], which displays significant bone uptake, all four ligand complexes do not accumulate in the skeletal system, indicating that they remain stable in vivo. Collectively, these studies suggest that the equatorial-spanning ligands H2dedpa, H2CHXdedpa, H2hox, and H2CHXhox are highly promising candidates for use in 230U TAT.
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Affiliation(s)
- Joshua J Woods
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States.,Robert F. Smith School for Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Ryan Unnerstall
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States.,Program in Quantitative Molecular Therapeutics, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Abbie Hasson
- Program in Quantitative Molecular Therapeutics, Washington University School of Medicine, St. Louis, Missouri 63110, United States.,Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63110, United States
| | - Diane S Abou
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States.,Program in Quantitative Molecular Therapeutics, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Valery Radchenko
- Life Science Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.,Chemistry Department, University of British Columbia, Vancouver, British Columbia V6T 2A3, Canada
| | - Daniel L J Thorek
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, United States.,Program in Quantitative Molecular Therapeutics, Washington University School of Medicine, St. Louis, Missouri 63110, United States.,Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63110, United States
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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13
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Mattocks JA, Cotruvo JA, Deblonde GJP. Engineering lanmodulin's selectivity for actinides over lanthanides by controlling solvent coordination and second-sphere interactions. Chem Sci 2022; 13:6054-6066. [PMID: 35685815 PMCID: PMC9132084 DOI: 10.1039/d2sc01261h] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/25/2022] [Indexed: 11/21/2022] Open
Abstract
Developing chelators that combine high affinity and selectivity for lanthanides and/or actinides is paramount for numerous industries, including rare earths mining, nuclear waste management, and cancer medicine. In particular, achieving selectivity between actinides and lanthanides is notoriously difficult. The protein lanmodulin (LanM) is one of Nature's most selective chelators for trivalent actinides and lanthanides. However, mechanistic understanding of LanM's affinity and selectivity for f-elements remains limited. In order to decipher, and possibly improve, the features of LanM's metal-binding sites that contribute to this actinide/lanthanide selectivity, we characterized five LanM variants, substituting the aspartate residue at the 9th position of each metal-binding site with asparagine, histidine, alanine, methionine, and selenomethionine. Spectroscopic measurements with lanthanides (Nd3+ and Eu3+) and actinides (243Am3+ and 248Cm3+) reveal that, contrary to the behavior of small chelator complexes, metal-coordinated water molecules enhance LanM's affinity for f-elements and pH-stability of its complexes. Furthermore, the results show that the native aspartate does not coordinate the metal directly but rather hydrogen bonds to coordinated solvent. By tuning this first-sphere/second-sphere interaction, the asparagine variant nearly doubles LanM's selectivity for actinides versus lanthanides. This study not only clarifies the essential role of coordinated solvent for LanM's physiological function and separation applications, but it also demonstrates that LanM's preference for actinides over lanthanides can be further improved. More broadly, it demonstrates how biomolecular scaffolds possess an expanded repertoire of tunable interactions compared to most small-molecule ligands – providing an avenue for high-performance LanM-based actinide/lanthanide separation methods and bio-engineered chelators optimized for specific medical isotopes. Nature’s most potent protein for f-elements, lanmodulin, relies on subtle first-sphere/second-sphere interactions to bind metal ions. Dissecting lanmodulin’s binding mechanism yielded variants with enhanced actinide/lanthanide selectivity.![]()
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Affiliation(s)
- Joseph A. Mattocks
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Joseph A. Cotruvo
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Gauthier J.-P. Deblonde
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Glenn T. Seaborg Institute, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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14
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Yang H, Wilson JJ, Orvig C, Li Y, Wilbur DS, Ramogida CF, Radchenko V, Schaffer P. Harnessing α-Emitting Radionuclides for Therapy: Radiolabeling Method Review. J Nucl Med 2022; 63:5-13. [PMID: 34503958 PMCID: PMC8717181 DOI: 10.2967/jnumed.121.262687] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
Targeted α-therapy (TAT) is an emerging powerful tool treating late-stage cancers for which therapeutic options are limited. At the core of TAT are targeted radiopharmaceuticals, where isotopes are paired with targeting vectors to enable tissue- or cell-specific delivery of α-emitters. DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) and DTPA (diethylenetriamine pentaacetic acid) are commonly used to chelate metallic radionuclides but have limitations. Significant efforts are underway to develop effective stable chelators for α-emitters and are at various stages of development and community adoption. Isotopes such as 149Tb, 212/213Bi, 212Pb (for 212Bi), 225Ac, and 226/227Th have found suitable chelators, although further studies, especially in vivo studies, are required. For others, including 223Ra, 230U, and, arguably 211At, the ideal chemistry remains elusive. This review summarizes the methods reported to date for the incorporation of 149Tb, 211At, 212/213Bi, 212Pb (for 212Bi), 223Ra, 225Ac, 226/227Th, and 230U into radiopharmaceuticals, with a focus on new discoveries and remaining challenges.
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Affiliation(s)
- Hua Yang
- Life Sciences Division, TRIUMF, Vancouver, British Columbia, Canada;
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Justin J Wilson
- Chemistry and Chemical Biology, Cornell University, Ithaca, New York
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Yawen Li
- Department of Radiation Oncology, University of Washington, Seattle, Washington
| | - D Scott Wilbur
- Department of Radiation Oncology, University of Washington, Seattle, Washington
| | - Caterina F Ramogida
- Life Sciences Division, TRIUMF, Vancouver, British Columbia, Canada
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Valery Radchenko
- Life Sciences Division, TRIUMF, Vancouver, British Columbia, Canada
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada; and
| | - Paul Schaffer
- Life Sciences Division, TRIUMF, Vancouver, British Columbia, Canada
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada
- Department of Radiology, University of British Columbia, Vancouver, British Columbia, Canada
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15
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Hu A, Brown V, MacMillan SN, Radchenko V, Yang H, Wharton L, Ramogida CF, Wilson JJ. Chelating the Alpha Therapy Radionuclides 225Ac 3+ and 213Bi 3+ with 18-Membered Macrocyclic Ligands Macrodipa and Py-Macrodipa. Inorg Chem 2021; 61:801-806. [PMID: 34965102 DOI: 10.1021/acs.inorgchem.1c03670] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The radionuclides 225Ac3+ and 213Bi3+ possess favorable physical properties for targeted alpha therapy (TAT), a therapeutic approach that leverages α radiation to treat cancers. A chelator that effectively binds and retains these radionuclides is required for this application. The development of ligands for this purpose, however, is challenging because the large ionic radii and charge-diffuse nature of these metal ions give rise to weaker metal-ligand interactions. In this study, we evaluated two 18-membered macrocyclic chelators, macrodipa and py-macrodipa, for their ability to complex 225Ac3+ and 213Bi3+. Their coordination chemistry with Ac3+ was probed computationally and with Bi3+ experimentally via NMR spectroscopy and X-ray crystallography. Furthermore, radiolabeling studies were conducted, revealing the efficient incorporation of both 225Ac3+ and 213Bi3+ by py-macrodipa that matches or surpasses the well-known chelators macropa and DOTA. Incubation in human serum at 37 °C showed that ∼90% of the 225Ac3+-py-macrodipa complex dissociates after 1 d. The Bi3+-py-macrodipa complex possesses remarkable kinetic inertness reflected by an EDTA transchelation challenge study, surpassing that of Bi3+-macropa. This work establishes py-macrodipa as a valuable candidate for 213Bi3+ TAT, providing further motivation for its implementation within new radiopharmaceutical agents.
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Affiliation(s)
- Aohan Hu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Victoria Brown
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Valery Radchenko
- Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.,Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Hua Yang
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.,Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - Luke Wharton
- Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.,Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Caterina F Ramogida
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.,Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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16
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Griffith DM, Li H, Werrett MV, Andrews PC, Sun H. Medicinal chemistry and biomedical applications of bismuth-based compounds and nanoparticles. Chem Soc Rev 2021; 50:12037-12069. [PMID: 34533144 DOI: 10.1039/d0cs00031k] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bismuth as a relatively non-toxic and inexpensive metal with exceptional properties has numerous biomedical applications. Bismuth-based compounds are used extensively as medicines for the treatment of gastrointestinal disorders including dyspepsia, gastric ulcers and H. pylori infections. Recently, its medicinal application was further extended to potential treatments of viral infection, multidrug resistant microbial infections, cancer and also imaging, drug delivery and biosensing. In this review we have highlighted the unique chemistry and biological chemistry of bismuth-209 as a prelude to sections covering the unique antibacterial activity of bismuth including a description of research undertaken to date to elucidate key molecular mechanisms of action against H. pylori, the development of novel compounds to treat infection from microbes beyond H. pylori and the significant role bismuth compounds can play as resistance breakers. Furthermore we have provided an account of the potential therapeutic application of bismuth-213 in targeted alpha therapy as well as a summary of the biomedical applications of bismuth-based nanoparticles and composites. Ultimately this review aims to provide the state of the art, highlight the untapped biomedical potential of bismuth and encourage original contributions to this exciting and important field.
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Affiliation(s)
- Darren M Griffith
- Department of Chemistry, Royal College of Surgeons in Ireland, 123 St. Stephens Green, Dublin 2, Ireland.,SSPC, Synthesis and Solid State Pharmaceutical Centre, Ireland
| | - Hongyan Li
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics for Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
| | | | - Philip C Andrews
- School of Chemistry, Monash University, Melbourne, VIC, Australia
| | - Hongzhe Sun
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics for Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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17
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Abstract
AbstractThe structural and bonding properties of Bi and Ac complexes with cyclen-based chelating ligands have been studied using relativistic DFT calculations in conjunction with TZ2P all-electron basis sets. Besides the parent cyclen ligand, the study has covered its extensions with pyridine-type (Lpy), carboxylate (DOTA, DOTPA), picolinate (MeDO2PA) and phosphonate (DOTMP) pendant arms. The effect of the cyclen ring size has been probed by increasing it from [12]aneN4 to [16]aneN4. Additional extensions in the DOTA complexes included the H2O ligand at the 9th coordination site as well as the p-SCN-Bn substituent (a popular linker to the targeting vector). The study focuses on the complex stability, the nature of bonding and the differences between Ac and Bi in the complexes. The metal–ligand interactions have been analysed by the Extended Transition State method combined with Natural Orbitals of Chemical Valence theory and Quantum Theory of Atoms in Molecules models.
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18
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Farzipour S, Shaghaghi Z, Abbasi S, Albooyeh H, Alvandi M. Recent Achievements about Targeted Alpha Therapy-Based Targeting Vectors and Chelating Agents. Anticancer Agents Med Chem 2021; 22:1496-1510. [PMID: 34315393 DOI: 10.2174/1871520621666210727120308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/22/2021] [Accepted: 06/28/2021] [Indexed: 11/22/2022]
Abstract
One of the most rapidly growing options in the management of cancer therapy is Targeted Alpha Therapy (TAT) through which lethal α-emitting radionuclides conjugated to tumor-targeting vectors selectively deliver high amount of radiation to cancer cells.225Ac, 212Bi, 211At, 213Bi, and 223Ra have been investigated by plenty of clinical trials and preclinical researches for the treatment of smaller tumor burdens, micro-metastatic disease, and post-surgery residual disease. In order to send maximum radiation to tumor cells while minimizing toxicity in normal cells, a high affinity of targeting vectors to cancer tissue is essential. Besides that, the stable and specific complex between chelating agent and α-emitters was found as a crucial parameter. The present review was planned to highlight recent achievements about TAT-based targeting vectors and chelating agents and provide further insight for future researches.
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Affiliation(s)
- Soghra Farzipour
- Cardiovascular Diseases Research Center, Department of Cardiology, Heshmat Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Zahra Shaghaghi
- Department of Nuclear Medicine and Molecular Imaging, Clinical Development Research Unit of Farshchian Heart Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Sahar Abbasi
- Department of Radiology, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hajar Albooyeh
- Department of Nuclear Medicine, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Alvandi
- Department of Nuclear Medicine and Molecular Imaging, Clinical Development Research Unit of Farshchian Heart Center, Hamadan University of Medical Sciences, Hamadan, Iran
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19
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Fiszbein DJ, Brown V, Thiele NA, Woods JJ, Wharton L, MacMillan SN, Radchenko V, Ramogida CF, Wilson JJ. Tuning the Kinetic Inertness of Bi 3+ Complexes: The Impact of Donor Atoms on Diaza-18-Crown-6 Ligands as Chelators for 213Bi Targeted Alpha Therapy. Inorg Chem 2021; 60:9199-9211. [PMID: 34102841 DOI: 10.1021/acs.inorgchem.1c01269] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The radionuclide 213Bi can be applied for targeted α therapy (TAT): a type of nuclear medicine that harnesses α particles to eradicate cancer cells. To use this radionuclide for this application, a bifunctional chelator (BFC) is needed to attach it to a biological targeting vector that can deliver it selectively to cancer cells. Here, we investigated six macrocyclic ligands as potential BFCs, fully characterizing the Bi3+ complexes by NMR spectroscopy, mass spectrometry, and elemental analysis. Solid-state structures of three complexes revealed distorted coordination geometries about the Bi3+ center arising from the stereochemically active 6s2 lone pair. The kinetic properties of the Bi3+ complexes were assessed by challenging them with a 1000-fold excess of the chelating agent diethylenetriaminepentaacetic acid (DTPA). The most kinetically inert complexes contained the most basic pendent donors. Density functional theory (DFT) and quantum theory of atoms in molecules (QTAIM) calculations were employed to investigate this trend, suggesting that the kinetic inertness is not correlated with the extent of the 6s2 lone pair stereochemical activity, but with the extent of covalency between pendent donors. Lastly, radiolabeling studies of 213Bi (30-210 kBq) with three of the most promising ligands showed rapid formation of the radiolabeled complexes at room temperature within 8 min for ligand concentrations as low as 10-7 M, corresponding to radiochemical yields of >80%, thereby demonstrating the promise of this ligand class for use in 213Bi TAT.
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Affiliation(s)
- David J Fiszbein
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Victoria Brown
- Department of Chemistry, Simon Fraser University, 8888 University Dr, Burnaby, BC V5A 1S6 Canada
| | - Nikki A Thiele
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Joshua J Woods
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States.,Robert F. Smith School for Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Luke Wharton
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 Canada.,Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Valery Radchenko
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 Canada.,Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Caterina F Ramogida
- Department of Chemistry, Simon Fraser University, 8888 University Dr, Burnaby, BC V5A 1S6 Canada.,Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 Canada
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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20
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Kovács A. Theoretical Study of Actinide(III)-DOTA Complexes. ACS OMEGA 2021; 6:13321-13330. [PMID: 34056480 PMCID: PMC8158830 DOI: 10.1021/acsomega.1c01292] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
1,4,7,10-Tetraazacyclododecane-N,N',N″,N‴-tetraacetic acid (DOTA) is a prominent chelating ligand used in imaging contrast agents and radiopharmaceuticals. The present study explores the stabilities, structures, and bonding properties of its complexes with trivalent actinides (Ac, U, Np, Pu, Am, Cm, Cf) using density functional theory and relativistic multireference calculations. For reference purposes, the La- and Lu-DOTA complexes are also included. Similar to La3+, the large An3+ ions prefer the TSAP conformer of the ligand. The An-ligand bonding is mainly electrostatic, with minor charge transfer contributions to the An 6d orbitals. For the assessment of the thermodynamic stabilities in aqueous solution, PCM radii to use in conjunction with the SMD solvation model were developed. Basically, the thermodynamic stability of the DOTA complexes increases along the An row but with notable counteracting of spin-orbit coupling.
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Affiliation(s)
- Attila Kovács
- European Commission Joint
Research Centre, P. O. Box 2340, Karlsruhe D-76125, Germany
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21
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Synthesis, characterization, and imaging of radiopaque bismuth beads for image-guided transarterial embolization. Sci Rep 2021; 11:533. [PMID: 33436734 PMCID: PMC7804415 DOI: 10.1038/s41598-020-79900-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 12/09/2020] [Indexed: 12/27/2022] Open
Abstract
Current therapy for hypervascular cancers, e.g., hepatocellular carcinoma, includes occlusion of the tumor blood supply by arterial infusion of embolic microspheres (beads) suspended in iodine-based contrast under fluoroscopic guidance. Available radiopaque, imageable beads use iodine as the radiopacifier and cannot be differentiated from contrast. This study aimed to synthesize and characterize imageable beads using bismuth as the radiopacifier that could be distinguished from iodine contrast based upon the difference in the binding energy of k-shell electrons (k-edge). Radiodense bismuth beads were successfully synthesized some with uniform bismuth distribution across the beads. The beads were spherical and could be infused through clinical microcatheters. The bismuth beads could be imaged with clinical dual-energy computed tomography (CT), where iodine-based contrast could be distinguished from the microspheres. The ability to separate iodine from bismuth may enhance the diagnostic information acquired on follow-up CT, identifying the distribution of the embolic beads separately from the contrast. Furthermore, with sequential use of iodine- and bismuth-based beads, the two radiopaque beads could be spatially distinguished on imaging, which may enable the development of dual drug delivery and dual tracking.
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22
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Grieve ML, Paterson BM. The Evolving Coordination Chemistry of Radiometals for Targeted Alpha Therapy. Aust J Chem 2021. [DOI: 10.1071/ch21184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Ibrahim M, Latif A, Ammara, Ali A, Ribeiro AI, Farooq U, Ullah F, Khan A, Al-Harrasi A, Ahmad M, Ali M. Macrocyclic sulfone derivatives: Synthesis, characterization, in vitro biological evaluation and molecular docking. Drug Dev Res 2020; 82:562-574. [PMID: 33368483 DOI: 10.1002/ddr.21775] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/28/2020] [Accepted: 12/02/2020] [Indexed: 11/10/2022]
Abstract
An artificial series of macrocycles based on 4,4'-sulfonyldiphenol intermediate was synthesized using a multistep procedure involving oxidation of bisphenol sulfide, etherification of phenolic hydroxyl groups, and final ring closure with different diamines. Different chemical species having aromatic, heteroaromatic, and aliphatic characters were incorporated into macrocyclic frameworks in the final step of ring closure. This simple and easily executable synthetic strategy was applied to synthesize 15 macrocycles (5a-o) in excellent yields. Characterization of the synthesized products was achieved through well-known modern spectroscopic techniques such as IR, NMR, and Mass. Macrocycles 5m and 5n were found to show significant AChE inhibition with IC50 values of 76.9 ± 0.24 and 71.2 ± 0.77 μM, respectively. Macrocycle 5n was also found to be an active inhibitor of butyrylcholinesterase (BChE) with IC50 score of 55.3 ± 0.54 μM. Among others, macrocycle 5l cyclized with o-phenylenediamine demonstrated moderate inhibition with IC50 value of 81.1 ± 0.54 μM. Increasing interest in studying interactions of macrocycles with different enzymatic targets compelled us to design and synthesize sulfone-based macrocycles that might prove as highly potent class of biologically active compounds.
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Affiliation(s)
- Muhammad Ibrahim
- Department of Chemistry, University of Malakand, Chakdara 18800, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - Abdul Latif
- Department of Chemistry, University of Malakand, Chakdara 18800, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - Ammara
- Department of Chemistry, University of Malakand, Chakdara 18800, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - Akbar Ali
- Department of Chemistry, University of Sargodha, Sargodha, 40100, Pakistan
| | - Alany Ingrid Ribeiro
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luís, Km 265, São Carlos, Brazil
| | - Umar Farooq
- Department of Chemistry, COMSATS University Islamabad, Islamabad Campus, Pakistan
| | - Farhat Ullah
- Department of Pharmacy, University of Malakand, Chakdara, Pakistan
| | - Ajmal Khan
- Natural and Medical Sciences Research Centre, University of Nizwa, PO Box 33, 616 Birkat Al Mauz, Nizwa, Oman
| | - Ahmed Al-Harrasi
- Natural and Medical Sciences Research Centre, University of Nizwa, PO Box 33, 616 Birkat Al Mauz, Nizwa, Oman
| | - Manzoor Ahmad
- Department of Chemistry, University of Malakand, Chakdara 18800, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - Mumtaz Ali
- Department of Chemistry, University of Malakand, Chakdara 18800, Dir Lower, Khyber Pakhtunkhwa, Pakistan
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24
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Bruchertseifer F, Comba P, Martin B, Morgenstern A, Notni J, Starke M, Wadepohl H. First-Generation Bispidine Chelators for 213 Bi III Radiopharmaceutical Applications. ChemMedChem 2020; 15:1591-1600. [PMID: 32613737 PMCID: PMC7496608 DOI: 10.1002/cmdc.202000361] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Indexed: 01/01/2023]
Abstract
Hepta- and octadentate bispidines (3,7-diazabicyclo[3.3.1]nonane, diaza-adamantane) with acetate, methyl-pyridine, and methyl-picolinate pendant groups at the amine donors of the bispidine platform have been prepared and used to investigate BiIII coordination chemistry. Crystal structure and solution spectroscopic data (NMR spectroscopy and mass spectrometry) confirm that the rigid and relatively large bispidine cavity with an axially distorted geometry is well suited for BiIII and in all cases forms nine-coordinate complexes; this is supported by an established hole size and shape analysis. It follows that nonadentate bispidines probably will be more suited as bifunctional chelators for 213 BiIII -based radiopharmaceuticals. However, two isomeric picolinate-/acetate-based heptadentate ligands already show very efficient complexation kinetics with 213 BiIII at ambient temperature and kinetic stability that is comparable with the standard ligands used in this field. The experimentally determined hydrophilicities (log D7.4 values) show that the BiIII complexes reported are relatively hydrophilic and well suited for medicinal applications. We also present a very efficient and relatively accurate method to compute charge distributions and hydrophilicities, and this will help to further optimize the systems reported here.
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Affiliation(s)
- Frank Bruchertseifer
- European Commission, Joint Research Centre/>Directorate for Nuclear Safety and SecurityHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Peter Comba
- Universität Heidelberg, Anorganisch-Chemisches InstitutNeuenheimer Feld 27069120HeidelbergGermany
- Universität Heidelberg Interdisciplinary Center for Scientific Computing In NeuenheimerFeld 20569120HeidelbergGermany
| | - Bodo Martin
- Universität Heidelberg, Anorganisch-Chemisches InstitutNeuenheimer Feld 27069120HeidelbergGermany
- Universität Heidelberg Interdisciplinary Center for Scientific Computing In NeuenheimerFeld 20569120HeidelbergGermany
| | - Alfred Morgenstern
- European Commission, Joint Research Centre/>Directorate for Nuclear Safety and SecurityHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Johannes Notni
- Technische Universität München Institut für Pathologie und Pathologische AnatomieTrogerstr. 1881675MunichGermany
| | - Miriam Starke
- Universität Heidelberg, Anorganisch-Chemisches InstitutNeuenheimer Feld 27069120HeidelbergGermany
| | - Hubert Wadepohl
- Universität Heidelberg, Anorganisch-Chemisches InstitutNeuenheimer Feld 27069120HeidelbergGermany
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25
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Thiele NA, Woods JJ, Wilson JJ. Implementing f-Block Metal Ions in Medicine: Tuning the Size Selectivity of Expanded Macrocycles. Inorg Chem 2019; 58:10483-10500. [DOI: 10.1021/acs.inorgchem.9b01277] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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26
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Deblonde GJP, Ricano A, Abergel RJ. Ultra-selective ligand-driven separation of strategic actinides. Nat Commun 2019; 10:2438. [PMID: 31164638 PMCID: PMC6547845 DOI: 10.1038/s41467-019-10240-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/25/2019] [Indexed: 12/30/2022] Open
Abstract
Metal ion separations are critical to numerous fields, including nuclear medicine, waste recycling, space exploration, and fundamental research. Nonetheless, operational conditions and performance are limited, imposing compromises between recovery, purity, and cost. Siderophore-inspired ligands show unprecedented charge-based selectivity and compatibility with harsh industry conditions, affording excellent separation efficiency, robustness and process control. Here, we successfully demonstrate a general separation strategy on three distinct systems, for Ac, Pu, and Bk purification. Separation factors (SF) obtained with model compound 3,4,3-LI(1,2-HOPO) are orders of magnitude higher than with any other ligand currently employed: 106 between Ac and relevant metal impurities, and over 108 for redox-free Pu purification against uranyl ions and trivalent actinides or fission products. Finally, a one-step separation method (SF > 3 × 106 and radiopurity > 99.999%) enables the isolation of Bk from adjacent actinides and fission products. The proposed approach offers a paradigm change for the production of strategic elements. Radionuclides are of great importance for fields such as nuclear medicine and waste recycling, but their efficient purification remains a challenge. Here the authors show that an octadentate hydroxypyridinone chelator enables efficient and robust separation processes for isotopes of Ac, Pu, and Bk.
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Affiliation(s)
- Gauthier J-P Deblonde
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Abel Ricano
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Rebecca J Abergel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. .,Department of Nuclear Engineering, University of California, Berkeley, CA, 94720, USA.
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27
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Ferrier MG, Radchenko V, Wilbur DS. Radiochemical aspects of alpha emitting radionuclides for medical application. RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2019-0005] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
The use of α-emitting radionuclides in targeted alpha therapy (TAT) holds great potential for treatment of human diseases, such as cancer, due to the short pathlength and high potency of the α particle, which can localize damage to targeted cells while minimizing effects to healthy surrounding tissues. In this review several potential α-emitting radionuclides having emission properties applicable to TAT are discussed from a radiochemical point of view. Overviews of production, radiochemical separation and chelation aspects relative to developing TAT radiopharmaceuticals are provided for the α-emitting radionuclides (and their generator systems) 211At, 224Ra/212Pb/212Bi, 225Ac/213Bi, 227Th/223Ra, 230U/226Th, 149Tb and 255Fm.
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Affiliation(s)
- Maryline G. Ferrier
- Department of Radiation Oncology, Radiochemistry Division , University of Washington , Seattle, WA , USA
| | - Valery Radchenko
- Life Sciences Division, TRIUMF , Vancouver, BC , Canada
- Department of Chemistry , University of British Columbia , Vancouver, BC , Canada
| | - D. Scott Wilbur
- Department of Radiation Oncology, Radiochemistry Division , University of Washington , Seattle, WA , USA
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28
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Kowalik M, Masternak J, Barszcz B. Recent Research Trends on Bismuth Compounds in Cancer Chemoand Radiotherapy. Curr Med Chem 2019; 26:729-759. [DOI: 10.2174/0929867324666171003113540] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 02/13/2017] [Accepted: 02/15/2017] [Indexed: 12/15/2022]
Abstract
Background:Application of coordination chemistry in nanotechnology is a rapidly developing research field in medicine. Bismuth complexes have been widely used in biomedicine with satisfactory therapeutic effects, mostly in Helicobacter pylori eradication, but also as potential antimicrobial and anti-leishmanial agents. Additionally, in recent years, application of bismuth-based compounds as potent anticancer drugs has been studied extensively.Methods:Search for data connected with recent trends on bismuth compounds in cancer chemo- and radiotherapy was carried out using web-based literature searching tools such as ScienceDirect, Springer, Royal Society of Chemistry, American Chemical Society and Wiley. Pertinent literature is covered up to 2016.Results:In this review, based on 213 papers, we highlighted a number of current problems connected with: (i) characterization of bismuth complexes with selected thiosemicarbazone, hydrazone, and dithiocarbamate classes of ligands as potential chemotherapeutics. Literature results derived from 50 papers show that almost all bismuth compounds inhibit growth and proliferation of breast, colon, ovarian, lung, and other tumours; (ii) pioneering research on application of bismuth-based nanoparticles and nanodots for radiosensitization. Results show great promise for improvement in therapeutic efficacy of ionizing radiation in advanced radiotherapy (described in 36 papers); and (iii) research challenges in using bismuth radionuclides in targeted radioimmunotherapy, connected with choice of adequate radionuclide, targeting vector, proper bifunctional ligand and problems with 213Bi recoil daughters toxicity (derived from 92 papers).Conclusion:This review presents recent research trends on bismuth compounds in cancer chemo- and radiotherapy, suggesting directions for future research.
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Affiliation(s)
- Mateusz Kowalik
- Institute of Chemistry, Jan Kochanowski University in Kielce, Kielce, Poland
| | - Joanna Masternak
- Institute of Chemistry, Jan Kochanowski University in Kielce, Kielce, Poland
| | - Barbara Barszcz
- Institute of Chemistry, Jan Kochanowski University in Kielce, Kielce, Poland
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29
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Abstract
Radiometals possess an exceptional breadth of decay properties and have been applied to medicine with great success for several decades. The majority of current clinical use involves diagnostic procedures, which use either positron-emission tomography (PET) or single-photon imaging to detect anatomic abnormalities that are difficult to visualize using conventional imaging techniques (e.g., MRI and X-ray). The potential of therapeutic radiometals has more recently been realized and relies on ionizing radiation to induce irreversible DNA damage, resulting in cell death. In both cases, radiopharmaceutical development has been largely geared toward the field of oncology; thus, selective tumor targeting is often essential for efficacious drug use. To this end, the rational design of four-component radiopharmaceuticals has become popularized. This Review introduces fundamental concepts of drug design and applications, with particular emphasis on bifunctional chelators (BFCs), which ensure secure consolidation of the radiometal and targeting vector and are integral for optimal drug performance. Also presented are detailed accounts of production, chelation chemistry, and biological use of selected main group and rare earth radiometals.
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Affiliation(s)
- Thomas I Kostelnik
- Medicinal Inorganic Chemistry Group, Department of Chemistry , University of British Columbia , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry , University of British Columbia , Vancouver , British Columbia V6T 1Z1 , Canada
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30
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Khabibullin AR, Karolak A, Budzevich MM, McLaughlin ML, Morse DL, Woods LM. Structure and properties of DOTA-chelated radiopharmaceuticals within the 225Ac decay pathway. MEDCHEMCOMM 2018; 9:1155-1163. [PMID: 30109003 PMCID: PMC6072494 DOI: 10.1039/c8md00170g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/05/2018] [Indexed: 11/21/2022]
Abstract
The successful delivery of toxic cargo directly to tumor cells is of primary importance in targeted (α) particle therapy. Complexes of radioactive atoms with the 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) chelating agent are considered as effective materials for such delivery processes. The DOTA chelator displays high affinity to radioactive metal isotopes and retains this capability after conjugation to tumor targeting moieties. Although the α-decay chains are well defined for many isotopes, the stability of chelations during the decay process and the impact of released energy on their structures remain unknown. The radioactive isotope 225Ac is an α-particle emitter that can be easily chelated by DOTA. However, 225Ac has a complex decay chain with four α-particle emissions during decay of each radionuclide. To advance our fundamental understanding of the consequences of α-decay on the stability of tumor-targeted 225Ac-DOTA conjugate radiopharmaceuticals, we performed first principles calculations of the structure, stability, and electronic properties of the DOTA chelator to the 225Ac radioactive isotope, and the initial daughters in the decay chain, 225Ac, 221Fr, 217At and 213Bi. Our calculations show that the atomic positions, binding energies, and electron localization functions are affected by the interplay between spin-orbit coupling, weak dispersive interactions, and environmental factors. Future empirical measurements may be guided and interpreted in light of these results.
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Affiliation(s)
| | - Aleksandra Karolak
- Department of Integrated Mathematical Oncology , H. Lee Moffitt Cancer Center and Research Institute , Tampa , FL , USA
| | - Mikalai M Budzevich
- Small Animal Imaging Laboratory Shared Resource , H. Lee Moffitt Cancer Center and Research Institute , Tampa , FL , USA
| | - Mark L McLaughlin
- Department of Pharmaceutical Sciences , West Virginia University , Health Sciences Center , Morgantown , WV , USA
| | - David L Morse
- Department of Cancer Physiology , H. Lee Moffitt Cancer Center and Research Institute , Tampa , FL , USA .
- Department of Oncologic Sciences , University of South Florida , Tampa , FL , USA
| | - Lilia M Woods
- Department of Physics , University of South Florida , Tampa , FL , USA .
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31
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Thiele NA, Wilson JJ. Actinium-225 for Targeted α Therapy: Coordination Chemistry and Current Chelation Approaches. Cancer Biother Radiopharm 2018; 33:336-348. [PMID: 29889562 DOI: 10.1089/cbr.2018.2494] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The α-emitting radionuclide actinium-225 possesses nuclear properties that are highly promising for use in targeted α therapy (TAT), a therapeutic strategy that employs α particle emissions to destroy tumors. A key factor, however, that may hinder the clinical use of actinium-225 is the poor understanding of its coordination chemistry, which creates challenges for the development of suitable chelation strategies for this ion. In this article, we provide an overview of the known chemistry of actinium and a summary of the chelating agents that have been explored for use in actinium-225-based TAT. This overview provides a starting point for researchers in the field of TAT to gain an understanding of this valuable therapeutic radionuclide.
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Affiliation(s)
- Nikki A Thiele
- Department of Chemistry and Chemical Biology, Cornell University , Ithaca, New York
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University , Ithaca, New York
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32
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Egorova B, Matazova E, Mitrofanov A, Aleshin G, Trigub A, Zubenko A, Fedorova O, Fedorov Y, Kalmykov S. Novel pyridine-containing azacrownethers for the chelation of therapeutic bismuth radioisotopes: Complexation study, radiolabeling, serum stability and biodistribution. Nucl Med Biol 2018; 60:1-10. [DOI: 10.1016/j.nucmedbio.2018.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 01/01/2018] [Accepted: 01/31/2018] [Indexed: 10/18/2022]
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33
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Pujales-Paradela R, Rodríguez-Rodríguez A, Gayoso-Padula A, Brandariz I, Valencia L, Esteban-Gómez D, Platas-Iglesias C. On the consequences of the stereochemical activity of the Bi(iii) 6s2 lone pair in cyclen-based complexes. The [Bi(DO3A)] case. Dalton Trans 2018; 47:13830-13842. [DOI: 10.1039/c8dt02602e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The spatial arrangement of donor atoms in Bi(iii) cyclen derivatives modulates the orientation and activity of the 6s2 lone pair.
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Affiliation(s)
- Rosa Pujales-Paradela
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Aurora Rodríguez-Rodríguez
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Antonella Gayoso-Padula
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Isabel Brandariz
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Laura Valencia
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidade de Vigo
- 36310 Pontevedra
- Spain
| | - David Esteban-Gómez
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Carlos Platas-Iglesias
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
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34
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Comba P, Jermilova U, Orvig C, Patrick BO, Ramogida CF, Rück K, Schneider C, Starke M. Octadentate Picolinic Acid-Based Bispidine Ligand for Radiometal Ions. Chemistry 2017; 23:15945-15956. [DOI: 10.1002/chem.201702284] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Peter Comba
- Universität Heidelberg; Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing, INF 270, D-; 69120 Heidelberg Germany
| | - Una Jermilova
- Life Sciences Division; TRIUMF; 4004 Wesbrook Mall Vancouver V6T 2A3 British Columbia Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group; University of British Columbia; Department of Chemistry; 2036 Main Mall Vancouver V6T 1Z1 British Columbia Canada
| | - Brian O. Patrick
- Medicinal Inorganic Chemistry Group; University of British Columbia; Department of Chemistry; 2036 Main Mall Vancouver V6T 1Z1 British Columbia Canada
| | - Caterina F. Ramogida
- Life Sciences Division; TRIUMF; 4004 Wesbrook Mall Vancouver V6T 2A3 British Columbia Canada
| | - Katharina Rück
- Universität Heidelberg; Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing, INF 270, D-; 69120 Heidelberg Germany
| | - Christina Schneider
- Universität Heidelberg; Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing, INF 270, D-; 69120 Heidelberg Germany
| | - Miriam Starke
- Universität Heidelberg; Anorganisch-Chemisches Institut and Interdisciplinary Center for Scientific Computing, INF 270, D-; 69120 Heidelberg Germany
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35
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Kelly JM, Amor-Coarasa A, Nikolopoulou A, Kim D, Williams C, Vallabhajosula S, Babich JW. Assessment of PSMA targeting ligands bearing novel chelates with application to theranostics: Stability and complexation kinetics of 68Ga 3+, 111In 3+, 177Lu 3+ and 225Ac 3. Nucl Med Biol 2017; 55:38-46. [PMID: 29055836 DOI: 10.1016/j.nucmedbio.2017.10.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 09/21/2017] [Accepted: 10/01/2017] [Indexed: 01/12/2023]
Abstract
INTRODUCTION Recent successes in the treatment of metastatic castration-resistant prostate cancer (mCRPCa) by systemic endoradiotherapy has sparked renewed interest in developing small molecule ligands targeting prostate-specific membrane antigen (PSMA) and chelators capable of stable complexation of metal radionuclides for imaging and therapy. As the size and coordination number of metals for imaging, such as 68Ga3+, and for targeted therapy, such as 177Lu3+ and 225Ac3+, are substantially different, they may show a preference for macrocycles of different denticity. We have prepared three simple conjugates that target PSMA and form radiometal complexes through coordination by either octa-, deca-, or dodecadentate tetraazacyclododecane chelators. The complex formation and metal ion selectivity of these constructs were determined at two relevant temperatures, complex stability was examined in vitro, and tumor targeting was demonstrated in preclinical PCa models with a view towards identifying a candidate with potential value as a theranostic agent for the imaging and therapy of mCRPCa. METHODS Three bifunctional chelates with high denticity, including the octadentate chelate DOTA, the decadentate 3p-C-DEPA and a novel dodecadentate analogue of DEPA, were synthesized and conjugated to a glutamate-urea-lysine (EuK) pharmacophore (EuK-DOTA, EuK-107 and EuK-106, respectively) to enable targeting of PSMA. The metal ion selectivity for each construct was determined by incubation at 25 °C and 95 °C with the trivalent radiometals 68Ga3+, 111In3+, 177Lu3+ and 225Ac3+. PSMA binding affinity was determined by competitive binding using LNCaP cells, while in vivo tumor targeting of the 68Ga-labeled constructs was examined by positron emission tomography (PET) in LNCaP xenograft tumor-bearing mice. RESULTS PMSA affinities (IC50 values) were 13.3 ± 0.9 nM for EuK-DOTA, 18.0 ± 3.7 nM for EuK-107 and 42.6 ± 6.6 nM for EuK-106. EuK-107 and EuK-DOTA proved to rapidly and near quantitatively complex 68Ga3+, 111In3+, 177Lu3+ and 225Ac3+ at 95 °C, with EuK-107 also rapidly complexing 111In3+ and 177Lu3+ at 25 °C. The inability of EuK-106 to chelate 177Lu3+ and 225Ac3+ suggests that size of the cavity of the macrocylic ring may be more critical than the number of donor groups for the chelation of larger radiometals. In vivo, 68Ga-EuK-107 proved to have similar uptake to 68Ga-DKFZ-PSMA-617, a theranostic ligand currently in clinical evaluation, in a PSMA positive xenograft tumor model. CONCLUSIONS The broad metal ion selectivity, good in vitro affinity for PSMA and good in vivo tumor targeting suggest that EuK-107, with the 3p-C-DEPA chelator, merits further evaluation as a theranostics construct in prostate cancer.
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Affiliation(s)
- James M Kelly
- Division of Radiopharmaceutical Sciences and MI(3), Department of Radiology, Weill Cornell Medicine, New York, NY, USA
| | - Alejandro Amor-Coarasa
- Division of Radiopharmaceutical Sciences and MI(3), Department of Radiology, Weill Cornell Medicine, New York, NY, USA
| | - Anastasia Nikolopoulou
- Division of Radiopharmaceutical Sciences and MI(3), Department of Radiology, Weill Cornell Medicine, New York, NY, USA; Citigroup Biomedical Imaging Center, Weill Cornell Medicine, New York, NY, USA
| | - Dohyun Kim
- Citigroup Biomedical Imaging Center, Weill Cornell Medicine, New York, NY, USA
| | - Clarence Williams
- Division of Radiopharmaceutical Sciences and MI(3), Department of Radiology, Weill Cornell Medicine, New York, NY, USA
| | - Shankar Vallabhajosula
- Citigroup Biomedical Imaging Center, Weill Cornell Medicine, New York, NY, USA; Division of Radiochemistry in Radiology, Weill Cornell Medicine, NY, New York, USA
| | - John W Babich
- Division of Radiopharmaceutical Sciences and MI(3), Department of Radiology, Weill Cornell Medicine, New York, NY, USA; Citigroup Biomedical Imaging Center, Weill Cornell Medicine, New York, NY, USA; Sandra and Edward Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA.
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36
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Ferrier M, Stein BW, Batista ER, Berg JM, Birnbaum ER, Engle JW, John KD, Kozimor SA, Lezama Pacheco JS, Redman LN. Synthesis and Characterization of the Actinium Aquo Ion. ACS CENTRAL SCIENCE 2017; 3:176-185. [PMID: 28386595 PMCID: PMC5364452 DOI: 10.1021/acscentsci.6b00356] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 06/07/2023]
Abstract
Metal aquo ions occupy central roles in all equilibria that define metal complexation in natural environments. These complexes are used to establish thermodynamic metrics (i.e., stability constants) for predicting metal binding, which are essential for defining critical parameters associated with aqueous speciation, metal chelation, in vivo transport, and so on. As such, establishing the fundamental chemistry of the actinium(III) aquo ion (Ac-aquo ion, Ac(H2O) x3+) is critical for current efforts to develop 225Ac [t1/2 = 10.0(1) d] as a targeted anticancer therapeutic agent. However, given the limited amount of actinium available for study and its high radioactivity, many aspects of actinium chemistry remain poorly defined. We overcame these challenges using the longer-lived 227Ac [t1/2 = 21.772(3) y] isotope and report the first characterization of this fundamentally important Ac-aquo coordination complex. Our X-ray absorption fine structure study revealed 10.9 ± 0.5 water molecules directly coordinated to the AcIII cation with an Ac-OH2O distance of 2.63(1) Å. This experimentally determined distance was consistent with molecular dynamics density functional theory results that showed (over the course of 8 ps) that AcIII was coordinated by 9 water molecules with Ac-OH2O distances ranging from 2.61 to 2.76 Å. The data is presented in the context of other actinide(III) and lanthanide(III) aquo ions characterized by XAFS and highlights the uniqueness of the large AcIII coordination numbers and long Ac-OH2O bond distances.
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Affiliation(s)
| | - Benjamin W. Stein
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique R. Batista
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - John M. Berg
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Eva R. Birnbaum
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Jonathan W. Engle
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
- University
of Wisconsin, Madison, Wisconsin 53711, United States
| | - Kevin D. John
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Stosh A. Kozimor
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | | | - Lindsay N. Redman
- Los
Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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37
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Lee JY, Park JH, Kim SW. Synthesis and evaluation of folate-immobilized198Au@SiO2nanocomposite materials for the diagnosis of folate-receptor-overexpressed tumor. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10659] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jun Young Lee
- Department of Advanced Materials Chemistry; College of Science and Technology, Dongguk University; Gyeongju 780-714 Republic of Korea
- Radiation Instrumentation Research Division; Korea Atomic Energy Research Institute; Jeongeup 580-185 Republic of Korea
| | - Jeong Hoon Park
- Radiation Instrumentation Research Division; Korea Atomic Energy Research Institute; Jeongeup 580-185 Republic of Korea
| | - Sang Wook Kim
- Department of Advanced Materials Chemistry; College of Science and Technology, Dongguk University; Gyeongju 780-714 Republic of Korea
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