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Woods JJ, Cosby AG, Wacker JN, Aguirre Quintana LM, Peterson A, Minasian SG, Abergel RJ. Macrocyclic 1,2-Hydroxypyridinone-Based Chelators as Potential Ligands for Thorium-227 and Zirconium-89 Radiopharmaceuticals. Inorg Chem 2023; 62:20721-20732. [PMID: 37590371 DOI: 10.1021/acs.inorgchem.3c02164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Thorium-227 (227Th) is an α-emitting radionuclide that has shown preclinical and clinical promise for use in targeted α-therapy (TAT), a type of molecular radiopharmaceutical treatment that harnesses high energy α particles to eradicate cancerous lesions. Despite these initial successes, there still exists a need for bifunctional chelators that can stably bind thorium in vivo. Toward this goal, we have prepared two macrocyclic chelators bearing 1,2-hydroxypyridinone groups. Both chelators can be synthesized in less than six steps from readily available starting materials, which is an advantage over currently available platforms. The complex formation constants (log βmlh) of these ligands with Zr4+ and Th4+, measured by spectrophotometric titrations, are greater than 34 for both chelators, indicating the formation of exceedingly stable complexes. Radiolabeling studies were performed to show that these ligands can bind [227Th]Th4+ at concentrations as low as 10-6 M, and serum stability experiments demonstrate the high kinetic stability of the formed complexes under biological conditions. Identical experiments with zirconium-89 (89Zr), a positron-emitting radioisotope used for positron emission tomography (PET) imaging, demonstrate that these chelators can also effectively bind Zr4+ with high thermodynamic and kinetic stability. Collectively, the data reported herein highlight the suitability of these ligands for use in 89Zr/227Th paired radioimmunotheranostics.
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Affiliation(s)
- Joshua J Woods
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Alexia G Cosby
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jennifer N Wacker
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Luis M Aguirre Quintana
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Appie Peterson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Stefan G Minasian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rebecca J Abergel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Nuclear Engineering, University of California Berkeley, Berkeley, California 94720, United States
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2
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Carbo-Bague I, Li C, McNeil BL, Gao Y, McDonagh AW, Van de Voorde M, Ooms M, Kunz P, Yang H, Radchenko V, Schreckenbach G, Ramogida CF. Comparative Study of a Decadentate Acyclic Chelate, HOPO-O 10, and Its Octadentate Analogue, HOPO-O 8, for Radiopharmaceutical Applications. Inorg Chem 2023; 62:20549-20566. [PMID: 36608341 DOI: 10.1021/acs.inorgchem.2c03671] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Radiolanthanides and actinides are aptly suited for the diagnosis and treatment of cancer via nuclear medicine because they possess unique chemical and physical properties (e.g., radioactive decay emissions). These rare radiometals have recently shown the potential to selectively deliver a radiation payload to cancer cells. However, their clinical success is highly dependent on finding a suitable ligand for stable chelation and conjugation to a disease-targeting vector. Currently, the commercially available chelates exploited in the radiopharmaceutical design do not fulfill all of the requirements for nuclear medicine applications, and there is a need to further explore their chemistry to rationally design highly specific chelates. Herein, we describe the rational design and chemical development of a novel decadentate acyclic chelate containing five 1,2-hydroxypyridinones, 3,4,3,3-(LI-1,2-HOPO), referred to herein as HOPO-O10, based on the well-known octadentate ligand 3,4,3-(LI-1,2-HOPO), referred to herein as HOPO-O8, a highly efficient chelator for 89Zr[Zr4+]. Analysis by 1H NMR spectroscopy and mass spectrometry of the La3+ and Tb3+ complexes revealed that HOPO-O10 forms bimetallic complexes compared to HOPO-O8, which only forms monometallic species. The radiolabeling properties of both chelates were screened with [135La]La3+, [155/161Tb]Tb3+, [225Ac]Ac3+ and, [227Th]Th4+. Comparable high specific activity was observed for the [155/161Tb]Tb3+ complexes, outperforming the gold-standard 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, yet HOPO-O10 surpassed HOPO-O8 with higher [227Th]Th4+ affinity and improved complex stability in a human serum challenge assay. A comprehensive analysis of the decadentate and octadentate chelates was performed with density functional theory for the La3+, Ac3+, Eu3+, Tb3+, Lu3+, and Th4+ complexes. The computational simulations demonstrated the enhanced stability of Th4+-HOPO-O10 over Th4+-HOPO-O8. This investigation reveals the potential of HOPO-O10 for the stable chelation of large tetravalent radioactinides for nuclear medicine applications and provides insight for further chelate development.
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Affiliation(s)
- Imma Carbo-Bague
- Department of Chemistry, Simon Fraser University, Burnaby, British ColumbiaV5A 1S6, Canada
| | - Cen Li
- Department of Chemistry, University of Manitoba, Winnipeg, ManitobaR3T 2N2, Canada
| | - Brooke L McNeil
- Department of Chemistry, Simon Fraser University, Burnaby, British ColumbiaV5A 1S6, Canada
- Life Sciences Division, TRIUMF, Vancouver, British ColumbiaV6T 2A3, Canada
| | - Yang Gao
- Department of Chemistry, University of Manitoba, Winnipeg, ManitobaR3T 2N2, Canada
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan610054, China
| | - Anthony W McDonagh
- Department of Chemistry, Simon Fraser University, Burnaby, British ColumbiaV5A 1S6, Canada
| | | | - Maarten Ooms
- NURA Research Group, Belgian Nuclear Research Center, SCK CEN, 2400Mol, Belgium
| | - Peter Kunz
- Department of Chemistry, Simon Fraser University, Burnaby, British ColumbiaV5A 1S6, Canada
- Accelerator Division, TRIUMF, Vancouver, British ColumbiaV6T 2A3, Canada
| | - Hua Yang
- Department of Chemistry, Simon Fraser University, Burnaby, British ColumbiaV5A 1S6, Canada
- Life Sciences Division, TRIUMF, Vancouver, British ColumbiaV6T 2A3, Canada
| | - Valery Radchenko
- Life Sciences Division, TRIUMF, Vancouver, British ColumbiaV6T 2A3, Canada
- Department of Chemistry, University of British Columbia, Vancouver, British ColumbiaV6T 1Z1, Canada
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, ManitobaR3T 2N2, Canada
| | - Caterina F Ramogida
- Department of Chemistry, Simon Fraser University, Burnaby, British ColumbiaV5A 1S6, Canada
- Life Sciences Division, TRIUMF, Vancouver, British ColumbiaV6T 2A3, Canada
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3
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Wang Q, Liu Z, Song YF, Chai Z, Wang D. Chelation Behaviors of 3,4,3-LI(1,2-HOPO) with Lanthanides and Actinides Implicated by Molecular Dynamics Simulations. Inorg Chem 2023; 62:4304-4313. [PMID: 36847745 DOI: 10.1021/acs.inorgchem.2c04460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
The hydroxypyridinone ligand 3,4,3-LI(1,2-HOPO) (denoted as t-HOPO) is a potential chelator agent for decorporation of in vivo actinides (An), while its coordination modes with actinides and the dynamics of the complexes (An(t-HOPO)) in aqueous phase remain unclear. Here, we report molecular dynamics simulations of the complexes with key actinides (Am3+, Cm3+, Th4+, U4+, Np4+, Pu4+) to study their coordination and dynamic behaviors. For comparison, the complexation of the ligand with a ferric ion and key lanthanides (Sm3+, Eu3+, Gd3+) was also studied. The simulations show that the nature of metal ions determines the properties of the complexes. The t-HOPO in the FeIII(t-HOPO)1- complex ion formed a compact and rigid cage to encapsulate the ferric ion, which was hexa-coordinated. Ln3+/An3+ cations were ennea-coordinated with eight ligating oxygen atoms from t-HOPO and one from an aqua ligand, and An4+ cations were deca-coordinated with a second aqua ligand. The t-HOPO shows strong affinity for metal ions (stronger for An4+ than Ln3+/An3+) benefited from its high denticity and its flexible backbone. Meanwhile, the complexes displayed different dynamic flexibilities, with the AnIV(t-HOPO) complexes more significant than the others, and in the AnIV(t-HOPO) complexes, the fluctuation of the t-HOPO ligand was highly correlated with that of the eight ligating O atoms. This is attributed to the more compact conformation of the ligand, which raises backbone tension, and the competition of the aqua ligand against the t-HOPO ligand in coordinating with the tetravalent actinides. This work enriches our understanding on the structures and conformational dynamics of the complexes of actinides with t-HOPO and is expected to benefit the design of HOPO analogues for actinide sequestering.
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Affiliation(s)
- Qin Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.,State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ziyi Liu
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yu-Fei Song
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhifang Chai
- State Key Laboratory of Radiation Medicine and Protection, and School of Radiation Medicine and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, Jiangsu, China.,CAS-HKU Joint Laboratory of Metallomics on Health and Environment, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Dongqi Wang
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.,CAS-HKU Joint Laboratory of Metallomics on Health and Environment, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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4
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Wang Y, Shield KM, Abergel RJ. Hydrophilic Chelators for Aqueous Reprocessing of Spent Nuclear Fuel. SEPARATION & PURIFICATION REVIEWS 2023. [DOI: 10.1080/15422119.2023.2182220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Yufei Wang
- Department of Nuclear Engineering, University of California, Berkeley, California, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Katherine M. Shield
- Department of Nuclear Engineering, University of California, Berkeley, California, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Rebecca J. Abergel
- Department of Nuclear Engineering, University of California, Berkeley, California, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
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5
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Melendez-Alafort L, Ferro-Flores G, De Nardo L, Ocampo-García B, Bolzati C. Zirconium immune-complexes for PET molecular imaging: Current status and prospects. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.215005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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6
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Folding Dynamics of 3,4,3-LI(1,2-HOPO) in Its Free and Bound State with U 4+ Implicated by MD Simulations. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238151. [PMID: 36500244 PMCID: PMC9740235 DOI: 10.3390/molecules27238151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/18/2022] [Accepted: 11/20/2022] [Indexed: 11/25/2022]
Abstract
The octadentate hydroxypyridonate ligand 3,4,3-LI(1,2-HOPO) (t-HOPO) shows strong binding affinity with actinide cations and is considered as a promising decorporation agent used to eliminate in vivo actinides, while its dynamics in its unbound and bound states in the condensed phase remain unclear. In this work, by means of MD simulations, the folding dynamics of intact t-HOPO in its neutral (t-HOPO0) and in its deprotonated state (t-HOPO4-) were studied. The results indicated that the deprotonation of t-HOPO in the aqueous phase significantly narrowed the accessible conformational space under the simulated conditions, and it was prepared in a conformation that could conveniently clamp the cations. The simulation of UIV-t-HOPO showed that the tetravalent uranium ion was deca-coordinated with eight ligating O atoms from the t-HOPO4- ligand, and two from aqua ligands. The strong electrostatic interaction between the U4+ ion and t-HOPO4- further diminished the flexibility of t-HOPO4- and confined it in a limited conformational space. The strong interaction between the U4+ ion and t-HOPO4- was also implicated in the shortened residence time of water molecules.
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7
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Arabzadeh H, Liu C, Acevedo O, Ren P, Yang W, Albrecht-Schönzart T. Hydration of divalent lanthanides, Sm 2+ and Eu 2+ : A molecular dynamics study with polarizable AMOEBA force field. J Comput Chem 2022; 43:1286-1297. [PMID: 35648124 PMCID: PMC10052752 DOI: 10.1002/jcc.26933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 03/31/2022] [Accepted: 05/08/2022] [Indexed: 11/06/2022]
Abstract
The chemistry of divalent lanthanides, Ln2+ , is a growing sub-field of heavy element chemistry owing to new synthetic approaches. However, some theoretical aspects of these unusual cations are currently underdeveloped, especially as they relate to their dynamic properties in solution. In this work, we address the hydration of two of the classical Ln2+ cations, Sm2+ and Eu2+ , using atomic multipole optimized energetic for biomolecular applications (AMOEBA) force fields. These cations have not been parameterized to date with AMOEBA, and few studies are available because of their instability with respect to oxidation in aqueous media. Coordination numbers (CN's) of 8.2 and 8.1 respectively for Sm2+ and Eu2+ , and 8.8 for both Sm3+ and Eu3+ have been obtained and are in good agreement with the few available AIMD and X-ray absorption fine structures studies. The decreased CN of Ln2+ compared with Ln3+ arises from progressive water exchange events that indicates the gradual stabilization of 8-coordinate structures with respect to 9-coordinate geometries. Moreover, the effects of the chloride counter anions on the coordination of Ln2+ cations have been studied at different chloride concentrations in this work. Lastly, water exchange times of Ln2+ cations have been calculated to provide a comprehensive understanding of the behavior of Eu2+ and Sm2+ in aqueous chloride media.
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Affiliation(s)
- Hesam Arabzadeh
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA
| | - Chengwen Liu
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | - Orlando Acevedo
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX 78712, USA
| | - Pengyu Ren
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | - Wei Yang
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
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8
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Cooper S, Kaltsoyannis N. Covalency in AnCl 2 (An = Th-No). Dalton Trans 2022; 51:5929-5937. [PMID: 35348160 DOI: 10.1039/d2dt00315e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A potential connection has previously been proposed between the emergence of unexpected covalent behaviour in various transcurium complexes and the increasing stability of the +2 oxidation state in the later members of the actinide series. We recently used computational methods to study AnCl3, finding evidence for energy degeneracy driven covalency in the later actinides, and here present a comparative study of AnCl2. The An-Cl bond lengths of the latter divide into two data sets; Th-Np, Cm, Bk and Pu, Am, Cf-No. On average the An-Cl bond length decreases for both sets but, with significant increases between Np and Pu, and between Bk and Cf, unlike the former group (Pu, Am, Cf-No)Cl2 have significantly larger lengths than the corresponding trichlorides. Using a range of Natural Bond Orbital (NBO), Natural Resonance Theory (NRT) and Quantum Theory of Atoms In Molecules (QTAIM) metrics, the covalency of the dichloride bonds is analysed. We find that the first group of dichlorides are similar to their trichloride counterparts and possess significantly more covalent bonds than (Pu, Am, Cf-No)Cl2. We believe this change in covalent behaviour across the series for the dichlorides is due to a decreased involvement of the 6d orbital in the later elements (as a result of the f-d excitation energy exceeding the d-stabilisation energy of the actinide ions in question). Moreover, we find that unlike the trichlorides, where the QTAIM delocalisation index indicates that covalency plateaus/moderately increases, An-Cl covalency decreases across the second half of the series for AnCl2. We attribute this difference in behaviour to a lack of significant energy degeneracy driven covalency for the dichlorides, with the energy difference between the dichlorides' β 5f and 3p Natural Atomic Orbitals being larger than for the trichlorides. Hence we find it is not the presence of a stable +2 oxidation state, but instead the extent of energy matching between the actinide 5f orbitals and the ligand 3p, that drives covalency in the transcurium chlorides.
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Affiliation(s)
- Sophie Cooper
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| | - Nikolas Kaltsoyannis
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
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9
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Wang X, Shi C, Guan J, Chen Y, Xu Y, Diwu J, Wang S. The development of molecular and nano actinide decorporation agents. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.04.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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10
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Carter KP, Wacker JN, Smith KF, Deblonde GJP, Moreau LM, Rees JA, Booth CH, Abergel RJ. In situ beam reduction of Pu(IV) and Bk(IV) as a route to trivalent transuranic coordination complexes with hydroxypyridinone chelators. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:315-322. [PMID: 35254293 PMCID: PMC8900832 DOI: 10.1107/s1600577522000200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
The solution-state interactions of plutonium and berkelium with the octadentate chelator 3,4,3-LI(1,2-HOPO) (343-HOPO) were investigated and characterized by X-ray absorption spectroscopy, which revealed in situ reductive decomposition of the tetravalent species of both actinide metals to yield Pu(III) and Bk(III) coordination complexes. X-ray absorption near-edge structure (XANES) measurements were the first indication of in situ synchrotron redox chemistry as the Pu threshold and white-line position energies for Pu-343-HOPO were in good agreement with known diagnostic Pu(III) species, whereas Bk-343-HOPO results were found to mirror the XANES behavior of Bk(III)-DTPA. Extended X-ray absorption fine structure results revealed An-OHOPO bond distances of 2.498 (5) and 2.415 (2) Å for Pu and Bk, respectively, which match well with bond distances obtained for trivalent actinides and 343-HOPO via density functional theory calculations. Pu(III)- and Bk(III)-343-HOPO data also provide initial insight into actinide periodicity as they can be compared with previous results with Am(III)-, Cm(III)-, Cf(III)-, and Es(III)-343-HOPO, which indicate there is likely an increase in 5f covalency and heterogeneity across the actinide series.
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Affiliation(s)
- Korey P. Carter
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jennifer N. Wacker
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Kurt F. Smith
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | | | - Liane M. Moreau
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Julian A. Rees
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Corwin H. Booth
- 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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11
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Baba K, Nagata K, Yajima T, Yoshimura T. Synthesis, Structures, and Equilibrium Reactions of La(III) and Ba(II) Complexes with Pyridine Phosphonate Pendant Arms on a Diaza-18-crown-6 Ether. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20210414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuaki Baba
- Radioisotope Research Center, Institute for Radiation Sciences, Osaka University, 2-4 Yamadaoka, Suita 565-0871
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka 560-0043
| | - Kojiro Nagata
- Radioisotope Research Center, Institute for Radiation Sciences, Osaka University, 2-4 Yamadaoka, Suita 565-0871
| | - Tatsuo Yajima
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamatecho, Suita 564-8680
| | - Takashi Yoshimura
- Radioisotope Research Center, Institute for Radiation Sciences, Osaka University, 2-4 Yamadaoka, Suita 565-0871
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12
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Pallares RM, Charrier M, Tejedor-Sanz S, Li D, Ashby PD, Ajo-Franklin CM, Ralston CY, Abergel RJ. Precision Engineering of 2D Protein Layers as Chelating Biogenic Scaffolds for Selective Recovery of Rare-Earth Elements. J Am Chem Soc 2022; 144:854-861. [PMID: 34985894 DOI: 10.1021/jacs.1c10802] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rare-earth elements, which include the lanthanide series, are key components of many clean energy technologies, including wind turbines and photovoltaics. Because most of these 4f metals are at high risk of supply chain disruption, the development of new recovery technologies is necessary to avoid future shortages, which may impact renewable energy production. This paper reports the synthesis of a non-natural biogenic material as a potential platform for bioinspired lanthanide extraction. The biogenic material takes advantage of the atomically precise structure of a 2D crystalline protein lattice with the high lanthanide binding affinity of hydroxypyridinonate chelators. Luminescence titration data demonstrated that the engineered protein layers have affinities for all tested lanthanides in the micromolar-range (dissociation constants) and a higher binding affinity for the lanthanide ions with a smaller ionic radius. Furthermore, competitive titrations confirmed the higher selectivity (up to several orders of magnitude) of the biogenic material for lanthanides compared to other cations commonly found in f-element sources. Lastly, the functionalized protein layers could be reused in several cycles by desorbing the bound metal with citrate solutions. Taken together, these results highlight biogenic materials as promising bioadsorption platforms for the selective binding of lanthanides, with potential applications in the recovery of these critical elements from waste.
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Affiliation(s)
- Roger M Pallares
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Marimikel Charrier
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sara Tejedor-Sanz
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Dong Li
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Paul D Ashby
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Caroline M Ajo-Franklin
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of BioSciences, Rice University, Houston, Texas 77005, United States
| | - Corie Y Ralston
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rebecca J Abergel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Nuclear Engineering, University of California, Berkeley, California 94720, United States
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13
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Guillou A, Ouadi A, Holland JP. Heptadentate chelates for 89Zr-radiolabelling of monoclonal antibodies. Inorg Chem Front 2022; 9:3071-3081. [PMID: 35770072 PMCID: PMC9196204 DOI: 10.1039/d2qi00442a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 05/10/2022] [Indexed: 11/21/2022]
Abstract
Zirconium complexation chemistry is an important area of research in the context of developing radiolabelled proteins for applications in diagnostic positron emission tomography (PET) imaging. Herein, we report the synthesis...
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Affiliation(s)
- Amaury Guillou
- University of Zurich, Department of Chemistry Winterthurerstrasse 190 CH-8057 Zurich Switzerland +41.44.63.53.990 https://www.hollandlab.org
| | - Ali Ouadi
- Université de Strasbourg, CNRS, IPHC UMR 7178 F-67000 Strasbourg France
| | - Jason P Holland
- University of Zurich, Department of Chemistry Winterthurerstrasse 190 CH-8057 Zurich Switzerland +41.44.63.53.990 https://www.hollandlab.org
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14
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Southcott L, Li L, Patrick BO, Stephan H, Jaraquemada-Peláez MDG, Orvig C. [ nat/89Zr][Zr(pypa)]: Thermodynamically Stable and Kinetically Inert Binary Nonadentate Complex for Radiopharmaceutical Applications. Inorg Chem 2021; 60:18082-18093. [PMID: 34788042 DOI: 10.1021/acs.inorgchem.1c02709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
H4pypa is a nonadentate nonmacrocyclic chelator, which previously demonstrated high affinity for scandium-44, lutetium-177, and indium-111. Herein, we report the highly stable binary [Zr(pypa)] complex; the nonradioactive complex was synthesized and characterized in detail using high-resolution electrospray-ionization mass spectroscopy (HR-ESI-MS) and various nuclear magnetic resonance spectroscopies (NMR), which revealed C2v symmetry of the complex. The geometry of [Zr(pypa)] was further detailed via X-ray crystallography and compared with the structure of [Fe(Hpypa)]. Despite a slow complexation rate with an association half-life of 31.4 h at pH 2 and room temperature, the [Zr(pypa)] complex is thermodynamically stable (log KML = 38.92, pZr = 39.4). Radiochemical studies demonstrated quantitative radiolabeling achieved at 10 μM chelator concentration within 2 h at 40 °C and pH = 7, antibody-compatible conditions. Of the utmost importance, [89Zr][Zr(pypa)] is highly kinetically inert upon challenge with excess EDTA and DFO ligands, superior to [89Zr][Zr(DFO)]+, and maintains inertness toward human serum.
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Affiliation(s)
- Lily Southcott
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.,Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Lily Li
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.,Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Holger Stephan
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden─Rossendorf, P.O. Box 51 01 19, D-01314 Dresden, Germany
| | - María de Guadalupe Jaraquemada-Peláez
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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15
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Dash D, Baral M, Kanungo BK. Development of a Flexible Tripodal Hydroxypyridinone Ligand with Cyclohexane Framework: Complexation, Solution Thermodynamics, Spectroscopic and DFT Studies. ChemistrySelect 2021. [DOI: 10.1002/slct.202102962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dibyajit Dash
- Department of Chemistry Sant Longowal Institute of Engineering and Technology Longowal Punjab 148106 India
| | - Minati Baral
- Department of Chemistry National Institute of Technology Kurukshetra Haryana 136119 India
| | - Bikram K Kanungo
- Department of Chemistry Sant Longowal Institute of Engineering and Technology Longowal Punjab 148106 India
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16
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Aoki J, Oonuma C, Sudowe R, Takagai Y. Adsorption Behavior of Pu(IV), Am(III), Cm(III), and U(VI) on Desferrioxamine B-immobilized Micropolymer and Its Applications in the Separation of Pu(IV). ANAL SCI 2021; 37:1641-1644. [PMID: 34759094 DOI: 10.2116/analsci.21n028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The adsorption properties of Pu(IV), Am(III), Cm(III), and U(VI) on desferrioxamine B-immobilized micropolymeric resin (DMPs) and adsorbed species were elucidated using thermodynamic constants and log β values. This allowed the determination of adsorption characteristics (91, 95, 88, and 97% for Pu(IV), Am(III), Cm(III), and U(VI), respectively) and individual pH-independent adsorption properties. Pu(IV) could be separated from Am(III), Cm(III), and U(VI) at pH 2. The separation of Pu(IV) from Am(III), Cm(III), and U(VI) was achieved by controlling the pH of the solution using a single resin.
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Affiliation(s)
- Jo Aoki
- Cluster of Science and Technology, Fukushima University
| | | | - Ralf Sudowe
- Department of Environmental & Radiological Health Sciences, Colorado State University
| | - Yoshitaka Takagai
- Cluster of Science and Technology, Fukushima University.,Institute of Environmental Radioactivity, Fukushima University
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17
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Toporivska Y, Mular A, Piasta K, Ostrowska M, Illuminati D, Baldi A, Albanese V, Pacifico S, Fritsky IO, Remelli M, Guerrini R, Gumienna-Kontecka E. Thermodynamic Stability and Speciation of Ga(III) and Zr(IV) Complexes with High-Denticity Hydroxamate Chelators. Inorg Chem 2021; 60:13332-13347. [PMID: 34414758 PMCID: PMC8424644 DOI: 10.1021/acs.inorgchem.1c01622] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Increasing attention
has been recently devoted to 89Zr(IV) and 68Ga(III) radionuclides, due to their favorable
decay characteristics for positron emission tomography (PET). In the
present paper, a deep investigation is presented on Ga(III) and Zr(IV)
complexes with a series of tri-(H3L1, H3L3, H3L4 and desferrioxamine
E, DFOE) and tetrahydroxamate (H4L2) ligands. Herein, we describe the rational
design and synthesis of two cyclic complexing agents (H3L1 and H4L2) bearing three and four hydroxamate
chelating groups, respectively. The ligand structures allow us to
take advantage of the macrocyclic effect; the H4L2 chelator contains an additional side
amino group available for a possible further conjugation with a biomolecule.
The thermodynamic stability of Ga(III) and Zr(IV) complexes in solution
has been measured using a combination of potentiometric and pH-dependent
UV–vis titrations, on the basis of metal–metal competition.
The Zr(IV)-H4L2 complex
is characterized by one of the highest formation constants reported
to date for a tetrahydroxamate zirconium chelate (log β = 45.9,
pZr = 37.0), although the complex-stability increase derived from
the introduction of the fourth hydroxamate binding unit is lower than
that predicted by theoretical calculations. Solution studies on Ga(III)
complexes revealed that H3L1 and H4L2 are stronger chelators in comparison to DFOB. The complex stability
obtained with the new ligands is also compared with that previously
reported for other hydroxamate ligands. In addition to increasing
the library of the thermodynamic stability data of Ga(III) and Zr(IV)
complexes, the present work allows new insights into Ga(III) and Zr(IV)
coordination chemistry and thermodynamics and broadens the selection
of available chelators for 68Ga(III) and 89Zr(IV). Solution equilibria studies on Ga(III)
and Zr(IV) complexes
with a series of tri- and tetrahydroxamate ligands are presented.
For this purpose, the rational design and synthesis of two cyclic
complexing agents bearing three and four hydroxamate chelating groups
was performed. The thermodynamic and speciation studies allow a discussion
of the structure−complex stability dependence. The Zr(IV)-tetrahydroxamate
complex is characterized by one of the highest formation constants
reported to date for a hydroxamate zirconium chelator.
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Affiliation(s)
- Yuliya Toporivska
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Andrzej Mular
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Karolina Piasta
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Małgorzata Ostrowska
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Davide Illuminati
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Andrea Baldi
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Valentina Albanese
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Salvatore Pacifico
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Igor O Fritsky
- Taras Shevchenko National University of Kyiv, Department of Chemistry, 64 Volodymyrska Str., 01601 Kyiv, Ukraine
| | - Maurizio Remelli
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Remo Guerrini
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
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18
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DGA resin capacity factors for Ac, Am and Th under tetravalent actinide selective complexation. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07774-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Bertoli AC, Miguita AGC, Mingote RM, Augusti R, Duarte HA. Unveiling the Zirconium and Hafnium Speciation in Fluoride‐Nitric Acid Solutions by Paper Spray Ionization Mass Spectrometry Combined with DFT Calculations. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202001140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexandre C. Bertoli
- Grupo de Pesquisa em Química Inorgânica Teórica (GPQIT) Departamento de Química Universidade Federal de Minas Gerais – UFMG Av. Pres. Antônio Carlos 6627 Pampulha, Belo Horizonte MG, 31270-901 Brazil
| | - Ana Gabriella C. Miguita
- Departamento de Química Universidade Federal de Minas Gerais – UFMG Av. Pres. Antônio Carlos 6627 Pampulha, Belo Horizonte MG, 31270-901 Brazil
| | - Raquel M. Mingote
- Centro de Desenvolvimento da Tecnologia Nuclear – CDTN Av. Pres. Antônio Carlos, 6627 Pampulha, Belo Horizonte MG, 31270-901 Brazil
| | - Rodinei Augusti
- Departamento de Química Universidade Federal de Minas Gerais – UFMG Av. Pres. Antônio Carlos 6627 Pampulha, Belo Horizonte MG, 31270-901 Brazil
| | - Hélio A. Duarte
- Grupo de Pesquisa em Química Inorgânica Teórica (GPQIT) Departamento de Química Universidade Federal de Minas Gerais – UFMG Av. Pres. Antônio Carlos 6627 Pampulha, Belo Horizonte MG, 31270-901 Brazil
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20
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Wang Y, Zhang Z, Abergel RJ. Hydroxypyridinone-based stabilization of Np(IV) enabling efficient U/Np/Pu separations in the Adapted PUREX process. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118178] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Carter KP, Smith KF, Tratnjek T, Deblonde GJP, Moreau LM, Rees JA, Booth CH, Abergel RJ. Controlling the Reduction of Chelated Uranyl to Stable Tetravalent Uranium Coordination Complexes in Aqueous Solution. Inorg Chem 2021; 60:973-981. [PMID: 33356197 DOI: 10.1021/acs.inorgchem.0c03088] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The solution-state interactions between octadentate hydroxypyridinone (HOPO) and catecholamide (CAM) chelating ligands and uranium were investigated and characterized by UV-visible spectrophotometry and X-ray absorption spectroscopy (XAS), as well as electrochemically via spectroelectrochemistry (SEC) and cyclic voltammetry (CV) measurements. Depending on the selected chelator, we demonstrate the controlled ability to bind and stabilize UIV, generating with 3,4,3-LI(1,2-HOPO), a tetravalent uranium complex that is practically inert toward oxidation or hydrolysis in acidic, aqueous solution. At physiological pH values, we are also able to bind and stabilize UIV to a lesser extent, as evidenced by the mix of UIV and UVI complexes observed via XAS. CV and SEC measurements confirmed that the UIV complex formed with 3,4,3-LI(1,2-HOPO) is redox inert in acidic media, and UVI ions can be reduced, likely proceeding via a two-electron reduction process.
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Affiliation(s)
- Korey P Carter
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kurt F Smith
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Toni Tratnjek
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Gauthier J-P Deblonde
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Glenn T. Seaborg Institute, Physical & Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Liane M Moreau
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Julian A Rees
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Corwin H Booth
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rebecca J Abergel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Nuclear Engineering, University of California, Berkeley, California 94709, United States
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22
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M. Pallares R, Hébert S, Sturzbecher-Hoehne M, Abergel RJ. Chelator-assisted high performance liquid chromatographic separation of trivalent lanthanides and actinides. NEW J CHEM 2021. [DOI: 10.1039/d1nj01966j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
3,4,3-LI(1,2-HOPO) can be used as a HPLC chelating agent, promoting lanthanide and trivalent actinide separation without column modifications.
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Affiliation(s)
- Roger M. Pallares
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Solène Hébert
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | | | - Rebecca J. Abergel
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Nuclear Engineering
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23
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Southcott L, Wang X, Wharton L, Yang H, Radchenko V, Kubeil M, Stephan H, de Guadalupe Jaraquemada-Peláez M, Orvig C. High denticity oxinate-linear-backbone chelating ligand for diagnostic radiometal ions [111In]In3+ and [89Zr]Zr4+. Dalton Trans 2021; 50:3874-3886. [DOI: 10.1039/d0dt04230g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A potentially decadentate oxinate-containing ligand was synthesized and assessed through solution thermodynamics studies, concentration dependent radiolabeling and serum stability assays with [nat/111In]In3+ and [nat/89Zr]Zr4+.
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Affiliation(s)
- Lily Southcott
- Medicinal Inorganic Chemistry Group
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Xiaozhu Wang
- Medicinal Inorganic Chemistry Group
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Luke Wharton
- Medicinal Inorganic Chemistry Group
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Hua Yang
- Life Sciences Division
- TRIUMF
- Vancouver
- Canada
| | - Valery Radchenko
- Life Sciences Division
- TRIUMF
- Vancouver
- Canada
- Department of Chemistry
| | - Manja Kubeil
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden Rossendorf
- 01328 Dresden
- Germany
| | - Holger Stephan
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden Rossendorf
- 01328 Dresden
- Germany
| | | | - Chris Orvig
- Medicinal Inorganic Chemistry Group
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
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24
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Bailey TA, Mocko V, Shield KM, An DD, Akin AC, Birnbaum ER, Brugh M, Cooley JC, Engle JW, Fassbender ME, Gauny SS, Lakes AL, Nortier FM, O'Brien EM, Thiemann SL, White FD, Vermeulen C, Kozimor SA, Abergel RJ. Developing the 134Ce and 134La pair as companion positron emission tomography diagnostic isotopes for 225Ac and 227Th radiotherapeutics. Nat Chem 2020; 13:284-289. [PMID: 33318671 DOI: 10.1038/s41557-020-00598-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 10/25/2020] [Indexed: 11/09/2022]
Abstract
Developing targeted α-therapies has the potential to transform how diseases are treated. In these interventions, targeting vectors are labelled with α-emitting radioisotopes that deliver destructive radiation discretely to diseased cells while simultaneously sparing the surrounding healthy tissue. Widespread implementation requires advances in non-invasive imaging technologies that rapidly assay therapeutics. Towards this end, positron emission tomography (PET) imaging has emerged as one of the most informative diagnostic techniques. Unfortunately, many promising α-emitting isotopes such as 225Ac and 227Th are incompatible with PET imaging. Here we overcame this obstacle by developing large-scale (Ci-scale) production and purification methods for 134Ce. Subsequent radiolabelling and in vivo PET imaging experiments in a small animal model demonstrated that 134Ce (and its 134La daughter) could be used as a PET imaging candidate for 225AcIII (with reduced 134CeIII) or 227ThIV (with oxidized 134CeIV). Evaluating these data alongside X-ray absorption spectroscopy results demonstrated how success relied on rigorously controlling the CeIII/CeIV redox couple.
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Affiliation(s)
- Tyler A Bailey
- Department of Nuclear Engineering, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | | | - Katherine M Shield
- Department of Nuclear Engineering, University of California, Berkeley, CA, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Dahlia D An
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | | | | | - Mark Brugh
- Los Alamos National Laboratory, Los Alamos, NM, USA
| | | | - Jonathan W Engle
- Department of Medical Physics, University of Wisconsin, Madison, WI, USA
| | | | - Stacey S Gauny
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Andrew L Lakes
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | | | | | | | | | | | | | - Rebecca J Abergel
- Department of Nuclear Engineering, University of California, Berkeley, CA, USA. .,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
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25
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Mattocks JA, Cotruvo JA. Biological, biomolecular, and bio-inspired strategies for detection, extraction, and separations of lanthanides and actinides. Chem Soc Rev 2020; 49:8315-8334. [PMID: 33057507 DOI: 10.1039/d0cs00653j] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Lanthanides and actinides are elements of ever-increasing technological importance in the modern world. However, the similar chemical and physical properties within these groups make purification of individual elements a challenge. Current industrial standards for the extraction, separation, and purification of these metals from natural sources, recycled materials, and industrial waste are inefficient, relying upon harsh conditions, repetitive steps, and ligands with only modest selectivity. Biological, biomolecular, and bio-inspired strategies towards improving these separations and making them more environmentally sustainable have been researched for many years; however, these methods often have insufficient selectivity for practical application. Recent developments in the understanding of how lanthanides are selectively acquired and used by certain bacteria offer the opportunity for a newer, more efficient take on these designs, as well as the possibility for fundamentally new designs and strategies. Herein, we review current cell-based and biomolecular (primarily small-molecule and protein-based) methods for detection, extraction, and separations of f-block elements. We discuss how the increasing knowledge regarding the selective recognition, uptake, trafficking, and storage of these elements in biological systems has informed and will continue to promote development of novel approaches to achieve these ends.
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Affiliation(s)
- Joseph A Mattocks
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
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26
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Ferrier MG, Li Y, Chyan MK, Wong R, Li L, Spreckelmeyer S, Hamlin DK, Mastren T, Fassbender ME, Orvig C, Wilbur DS. Thorium chelators for targeted alpha therapy: Rapid chelation of thorium-226. J Labelled Comp Radiopharm 2020; 63:502-516. [PMID: 32812275 DOI: 10.1002/jlcr.3875] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 08/06/2020] [Accepted: 08/06/2020] [Indexed: 12/26/2022]
Abstract
One of the main challenges in targeted alpha therapy is assuring delivery of the α-particle dose to the targeted cells. Thus, it is critical to identify ligands for α-emitting radiometals that will form complexes that are very stable, both in vitro and in vivo. In this investigation, thorium-227 (t1/2 = 18.70 days) chelation of ligands containing hydroxypyridinonate (HOPO) or picolinic acid (pa) moieties and the stability of the resultant complexes were studied. Chelation reactions were followed by reversed-phased HPLC and gamma spectroscopy. Studies revealed that high 227 Th chelation yields could be obtained within 2.5 h or less with ligands containing four Me-3,2-HOPO moieties, 1 (83%) and 2 (65%), and also with ligands containing pa moieties, H4 octapa 3 (65%) and H4 py4pa 6 (87%). No reaction occurred with H4 neunpa-p-Bn-NO2 4, and the chelation reaction with another pa ligand H4 pypa 5 gave inconsistent yields with a very broad radio-HPLC peak. The ligands spermine-(Me-3,2-HOPO)4 1, H4 octapa 3, and H4 py4pa 6 had high stability (i.e., 87% of 227 Th still bound to the ligand) in phosphate-buffered saline at room temperature over a 6-day period. Preliminary studies with ligand 6 demonstrated efficient chelation of thorium-226 (t1/2 = 30.57 min) when heated to 80°C for 5 min.
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Affiliation(s)
- Maryline G Ferrier
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA.,Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California, USA
| | - Yawen Li
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Ming-Kuan Chyan
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Roger Wong
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Lily Li
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada.,Life Sciences Division, TRIUMF, Vancouver, British Columbia, Canada
| | - Sarah Spreckelmeyer
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Donald K Hamlin
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
| | - Tara Mastren
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
| | | | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - D Scott Wilbur
- Department of Radiation Oncology, University of Washington, Seattle, Washington, USA
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27
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Wang Y, Deblonde GJP, Abergel RJ. Hydroxypyridinone Derivatives: A Low-pH Alternative to Polyaminocarboxylates for TALSPEAK-like Separation of Trivalent Actinides from Lanthanides. ACS OMEGA 2020; 5:12996-13005. [PMID: 32548484 PMCID: PMC7288584 DOI: 10.1021/acsomega.0c00873] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 05/08/2020] [Indexed: 05/06/2023]
Abstract
Separation of lanthanides (Ln) from actinides (An) is unanimously challenging in reprocessing used nuclear fuel despite of much dedicated efforts over the past several decades. The TALSPEAK process is the current reference method in the United States for Ln3+/An3+ separation but suffers from several limitations, such as a narrow working pH window (3.5-4.0), costly pH buffers, and slow extraction kinetics. Studies aiming at improving TALSPEAK have so far focused on polyaminocarboxylates hold-back reagents. Here, a new class of water-soluble ligands comprising hydroxypyridinone metal-binding units are evaluated for Ln3+/An3+ separation. The model octadentate chelator 3,4,3-LI(1,2-HOPO) (abbreviated as HOPO) was used in combination with several industry-relevant organic extractants to separate Gd from four transplutonium elements (Am, Cm, Bk, and Cf). Cyanex 301 GN and HDEHP worked best in combination with HOPO, whereas HEH[EHP], Cyanex 572, and ACORGA M5640 did not yield practical Ln3+/An3+ separation. Separation factors between Gd3+ and Am3+ reach about 50 with the HOPO/Cyanex 301 GN system and 30 with the HOPO/HDEHP system. The results using HDEHP (SFGd/Am = 30, SFGd/Cm = 8.5, and SFGd/Cf = 773) are high enough for industrial applications, and the proposed system works at pH values as low as 1.5, which simplifies the process by eliminating the need for pH buffers. In contrast to previously proposed methods, the HOPO-based process is also highly selective at separating Bk from Ln3+ (SFGd/Bk = 273) owing to in situ, spontaneous oxidation of Bk(III) to Bk(IV) by HOPO. The optimal pH in the case of HOPO/Cyanex 301 GN is 3.6 (SFAm/Gd = 50, SFCm/Gd = 23, SFBk/Gd = 1.4, and SFCf/Gd = 3.2), but this system has the advantage of extracting An ions into the organic phase while keeping Ln ions in the aqueous phase, which is opposite to the conventional TALSPEAK process. This study represents the first optimization of a TALSPEAK-like Ln/An separation method using a HOPO chelator and paves the avenue for further developments of analytical science and reprocessing of used nuclear fuel.
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Affiliation(s)
- Yufei Wang
- Department
of Nuclear Engineering, University of California,
Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Gauthier J.-P. Deblonde
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Rebecca J. Abergel
- Department
of Nuclear Engineering, University of California,
Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
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28
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Pallares RM, An DD, Tewari P, Wang ET, Abergel RJ. Rapid Detection of Gadolinium-Based Contrast Agents in Urine with a Chelated Europium Luminescent Probe. ACS Sens 2020; 5:1281-1286. [PMID: 32352783 DOI: 10.1021/acssensors.0c00615] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Gadolinium-based contrast agents are widely used in magnetic resonance imaging procedures to enhance image contrast. Despite their ubiquitous use in clinical settings, gadolinium is not an innocuous element, as suggested by several disorders associated with its use. Therefore, novel analytical technologies capable of tracking contrast agent excretion through urine are necessary for optimizing patient safety after imaging procedures. Here, we describe an assay to detect and quantify contrast agents in urine based on the luminescence quenching of a metal chelate probe, Eu3+-3,4,3-LI(1,2-HOPO), which only requires 10 min incubation before measurement. Gadolinium-based contrast agents prevent the formation of the Eu3+-3,4,3-LI(1,2-HOPO) complex, subsequently decreasing the luminescence of the assay solution. Three commercial contrast agents, Magnevist, Multihance, and Omniscan, were used to demonstrate the analytical concept in synthetic human urine, and subsequent quantification of mouse urine samples. To the best of our knowledge, this is the first assay capable of detecting and quantifying gadolinium-based contrast agents in urine without sample preparation or digestion.
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Affiliation(s)
- Roger M. Pallares
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Dahlia D. An
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Pariswi Tewari
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Elizabeth T. Wang
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rebecca J. Abergel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Nuclear Engineering, University of California, Berkeley, California 94720, United States
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29
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Developing scandium and yttrium coordination chemistry to advance theranostic radiopharmaceuticals. Commun Chem 2020; 3:61. [PMID: 36703424 PMCID: PMC9814396 DOI: 10.1038/s42004-020-0307-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 04/22/2020] [Indexed: 01/29/2023] Open
Abstract
The octadentate siderophore analog 3,4,3-LI(1,2-HOPO), denoted 343-HOPO hereafter, is known to have high affinity for both trivalent and tetravalent lanthanide and actinide cations. Here we extend its coordination chemistry to the rare-earth cations Sc3+ and Y3+ and characterize fundamental metal-chelator binding interactions in solution via UV-Vis spectrophotometry, nuclear magnetic resonance spectroscopy, and spectrofluorimetric metal-competition titrations, as well as in the solid-state via single crystal X-ray diffraction. Sc3+ and Y3+ binding with 343-HOPO is found to be robust, with both high thermodynamic stability and fast room temperature radiolabeling, indicating that 343-HOPO is likely a promising chelator for in vivo applications with both metals. As a proof of concept, we prepared a 86Y-343-HOPO complex for in vivo PET imaging, and the results presented herein highlight the potential of 343-HOPO chelated trivalent metal cations for therapeutic and theranostic applications.
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30
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Sadhu B, Dolg M, Kulkarni MS. Periodic trends and complexation chemistry of tetravalent actinide ions with a potential actinide decorporation agent 5-LIO(Me-3,2-HOPO): A relativistic density functional theory exploration. J Comput Chem 2020; 41:1427-1435. [PMID: 32125003 DOI: 10.1002/jcc.26186] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/22/2020] [Accepted: 02/17/2020] [Indexed: 12/28/2022]
Abstract
A relativistic density functional theory (DFT) study is reported which aims to understand the complexation chemistry of An4+ ions (An = Th, U, Np, and Pu) with a potential decorporation agent, 5-LIO(Me-3,2-HOPO). The calculations show that the periodic change of the metal binding free energy has an excellent correlation with the ionic radii and such change of ionic radii also leads to the structural modulation of actinide-ligand complexes. The calculated structural and binding parameters agree well with the available experimental data. Atomic charges derived from quantum theory of atoms in molecules (QTAIM) and natural bond order (NBO) analysis shows the major role of ligand-to-metal charge transfer in the stability of the complexes. Energy decomposition analysis, QTAIM, and electron localization function (ELF) predict that the actinide-ligand bond is dominantly ionic, but the contribution of orbital interaction is considerable and increases from Th4+ to Pu4+ . A decomposition of orbital contributions applying the extended transition state-natural orbital chemical valence method points out the significant π-donation from the oxygen donor centers to the electron-poor actinide ion. Molecular orbital analysis suggests an increasing trend of orbital mixing in the context of 5f orbital participation across the tetravalent An series (Th-Pu). However, the corresponding overlap integral is found to be smaller than in the case of 6d orbital participation. An analysis of the results from the aforementioned electronic structure methods indicates that such orbital participation possibly arises due to the energy matching of ligand and metal orbitals and carries the signature of near-degeneracy driven covalency.
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Affiliation(s)
- Biswajit Sadhu
- Health Physics Division, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - Michael Dolg
- Institute for Theoretical Chemistry, Greinstr. 4, University of Cologne, Cologne, Germany
| | - Mukund S Kulkarni
- Health Physics Division, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
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31
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Pallares RM, Carter KP, Zeltmann SE, Tratnjek T, Minor AM, Abergel RJ. Selective Lanthanide Sensing with Gold Nanoparticles and Hydroxypyridinone Chelators. Inorg Chem 2020; 59:2030-2036. [PMID: 31971379 DOI: 10.1021/acs.inorgchem.9b03393] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The octadentate hydroxypyridinone chelator 3,4,3-LI(1,2-HOPO) is a promising therapeutic agent because of its high affinity for f-block elements and noncytotoxicity at medical dosages. The interaction between 3,4,3-LI(1,2-HOPO) and other biomedically relevant metals such as gold, however, has not been explored. Gold nanoparticles functionalized with chelators have demonstrated great potential in theranostics, yet thus far, no protocol that combines 3,4,3-LI(1,2-HOPO) and colloidal gold has been developed. Here, we characterize the solution thermodynamic properties of the complexes formed between 3,4,3-LI(1,2-HOPO) and Au3+ ions and demonstrate how under specific pH conditions the chelator promotes the growth of gold nanoparticles, acting as both reducing and stabilizing agent. 3,4,3-LI(1,2-HOPO) ligands on the nanoparticle surface remain active and selective toward f-block elements, as evidenced by gold nanoparticle selective aggregation. Finally, a new colorimetric assay capable of reaching the detection levels necessary for the quantification of lanthanides in waste from industrial processes is developed based on the inhibition of particle growth by lanthanides.
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Affiliation(s)
- Roger M Pallares
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Korey P Carter
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Steven E Zeltmann
- National Center for Electron Microscopy, Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Toni Tratnjek
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Andrew M Minor
- National Center for Electron Microscopy, Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States.,Department of Materials Science and Engineering , University of California , Berkeley , California 94720 , United States
| | - Rebecca J Abergel
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States.,Department of Nuclear Engineering , University of California , Berkeley , California 94720 , United States
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32
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Abstract
The thermodynamic stability of a metal-ligand complex, as measured by the formation constant (log β), is one of the most important parameters that determines metal ion selectivity and potential applications in, for example, radiopharmaceutical science. The stable coordination chemistry of radioactive 89Zr4+ in an aqueous environment is of paramount importance when developing positron-emitting radiotracers based on proteins (usually antibodies) for use with positron emission tomography. Desferrioxamine B (DFO) remains the chelate of choice for clinical applications of 89Zr-labeled proteins, but the coordination of DFO to Zr4+ ions is suboptimal. Many alternative ligands have been reported, but the challenges in measuring very high log β values with metal ions such as Zr4+ that tend to hydrolyze mean that accurate thermodynamic data are scarce. In this work, density functional theory (DFT) calculations were used to predict the reaction energetics for metal ion complexation. Computed values of pseudoformation constants (log β') are correlated with experimental data and showed an excellent linear relationship (R2 = 0.97). The model was then used to estimate the absolute and relative formation constants of 23 different Zr4+ complexes using a total of 17 different ligands, including many of the alternative bifunctional chelates that have been reported recently for use in 89Zr4+ radiochemistry. In addition, detailed computational studies were performed on the geometric isomerism and hydration state of Zr-desferrioxamine. Collectively, the results offer new insights into Zr4+ coordination chemistry that will help guide the synthesis of future ligands. The computational model developed here is straightforward and reproducible and can be readily applied in the design of other metal coordination compounds.
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Affiliation(s)
- Jason P Holland
- University of Zurich , Department of Chemistry , Winterthurerstrasse 190 , CH-8057 Zurich , Switzerland
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33
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Radoske T, Kloditz R, Fichter S, März J, Kaden P, Patzschke M, Schmidt M, Stumpf T, Walter O, Ikeda-Ohno A. Systematic comparison of the structure of homoleptic tetradentate N 2O 2-type Schiff base complexes of tetravalent f-elements (M(IV) = Ce, Th, U, Np, and Pu) in solid state and in solution. Dalton Trans 2020; 49:17559-17570. [PMID: 33216088 DOI: 10.1039/d0dt03405c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of tetradentate N2O2-type Schiff base complexes with tetravalent 4f- and 5f-block metals, [M(salpn)2] (H2salpn = N,N'-disalicylidene-1,3-diaminopropane; M = Ce, Th, U, Np, and Pu), were prepared to systematically investigate their solid state structure, and their complexation behaviour in solution with the goal to investigate the subtle differences between 4f- and 5f-elements. X-ray diffraction revealed that all investigated metal cations form [M(salpn)2] complexes. All the complexes show the same ligand arrangement with meridional conformation, amongst which only Ce(iv) exhibits unique behaviour upon crystallisation. [Ce(salpn)2] crystallises in two less symmetric systems (P1[combining macron] or P21/n), whilst all the other [M(salpn)2] crystallise in a more symmetric orthorhombic system (Pban). Quantum chemical calculations suggest that the observed structural peculiarity of Ce(iv) stems from the geometrical flexibility due to the more "ionic" nature of bonds to the 4f element. 1H NMR measurements revealed that [M(salpn)2] forms two different species in solution with and without an additional solvent molecule, where the relative distribution of the two species depends mainly on the ionic radius of the metal centre. Again, Ce(iv) behaves differently from the tetravalent actinides with a higher ratio of the solvent-molecule-coordinated species than the ratio expected from its ionic radius. Hence, this study is successful in observing subtle differences between 4f- (i.e. Ce) and 5f-elements (actinides; Th, U, Np, and Pu) both in the solid state and in solution on an analytically distinguishable level, and in relating the observed subtle differences to their electronic structure.
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Affiliation(s)
- Thomas Radoske
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
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34
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Buchwalder C, Jaraquemada-Peláez MDG, Rousseau J, Merkens H, Rodríguez-Rodríguez C, Orvig C, Bénard F, Schaffer P, Saatchi K, Häfeli UO. Evaluation of the Tetrakis(3-Hydroxy-4-Pyridinone) Ligand THPN with Zirconium(IV): Thermodynamic Solution Studies, Bifunctionalization, and in Vivo Assessment of Macromolecular 89Zr-THPN-Conjugates. Inorg Chem 2019; 58:14667-14681. [DOI: 10.1021/acs.inorgchem.9b02350] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christian Buchwalder
- University of British Columbia, Faculty of Pharmaceutical Sciences, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | | | - Julie Rousseau
- BC Cancer Agency, Department of Functional Imaging, 600 West 10th Avenue, Vancouver, BC V5Z 4E6, Canada
| | - Helen Merkens
- BC Cancer Agency, Department of Functional Imaging, 600 West 10th Avenue, Vancouver, BC V5Z 4E6, Canada
| | - Cristina Rodríguez-Rodríguez
- University of British Columbia, Faculty of Pharmaceutical Sciences, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
- University of British Columbia, Department of Physics & Astronomy, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, University of British Columbia, Department of Chemistry, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - François Bénard
- BC Cancer Agency, Department of Functional Imaging, 600 West 10th Avenue, Vancouver, BC V5Z 4E6, Canada
| | - Paul Schaffer
- TRIUMF, Life Sciences Division, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
| | - Katayoun Saatchi
- University of British Columbia, Faculty of Pharmaceutical Sciences, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Urs O. Häfeli
- University of British Columbia, Faculty of Pharmaceutical Sciences, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
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35
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Toporivska Y, Gumienna-Kontecka E. The solution thermodynamic stability of desferrioxamine B (DFO) with Zr(IV). J Inorg Biochem 2019; 198:110753. [PMID: 31229836 DOI: 10.1016/j.jinorgbio.2019.110753] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 06/10/2019] [Accepted: 06/14/2019] [Indexed: 12/19/2022]
Abstract
Desferrioxamine B (DFO, [H4L]+, ligand) is currently the preferred chelator for 89Zr(IV), however the biological studies suggest that it releases the metal ion in vivo. Herein, we present the solution thermodynamics of complexes formed between Zr(IV) and this hexadentate chelating agent, the data surprisingly not yet available in the literature. Several techniques including electrospray ionization mass spectrometry (ESI-MS), potentiometry, UV-Vis spectroscopy and isothermal titration calorimetry (ITC) were used to determine the stoichiometry and thermodynamic stability of complexes formed in solution over pH range 1-11, overcoming all the difficulties with the characterisation of the aqueous solution chemistry of Zr(IV) complexes, like strong hydrolysis and lack of spectral information. A model containing only mononuclear complexes, i.e. [ZrHL]2+ [ZrL]+, [ZrLH-1] throughout the entire measured pH range is proposed. The stability constants and pM (Zr(IV)) value determined for Zr(IV)-DFO system, place DFO among good Zr(IV) chelators, however the formation of 6-coordinate unsaturated complexes (i.e. with coordination sphere of 8-coordinate Zr(IV) completed by water molecules), together with the susceptibility of coordinated water molecule to deprotonation, are suggested to be the reason of in vivo instability of 89Zr(IV)-DFO complexes.
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Affiliation(s)
- Yuliya Toporivska
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland
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36
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Ricano A, Captain I, Carter KP, Nell BP, Deblonde GJP, Abergel RJ. Combinatorial design of multimeric chelating peptoids for selective metal coordination. Chem Sci 2019; 10:6834-6843. [PMID: 31391906 PMCID: PMC6657411 DOI: 10.1039/c9sc01068h] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 06/05/2019] [Indexed: 12/15/2022] Open
Abstract
The combinatorial synthesis of a new library of tetrameric peptoid ligands is introduced, enabling coordination and characterization of f-block metals.
Current methods for metal chelation are generally based on multidentate organic ligands, which are generated through cumbersome multistep synthetic processes that lack flexibility for systematically varying metal-binding motifs. Octadentate ligands incorporating hydroxypyridinone or catecholamide binding moieties onto a spermine scaffold are known to display some of the highest affinities towards f-elements. Enhancing binding affinity for specific lanthanide or actinide ions however, necessitates ligand architectures that allow for modular and high throughput synthesis. Here we introduce a high-throughput combinatorial library of 16 tetrameric N-substituted glycine oligomers (peptoids) containing hydroxypyridinone or catecholamide chelating units linked via an ethylenediamine bridge and, for comparison, we also synthesized the corresponding mixed ligands derived from the spermine scaffold: 3,4,3-LI(1,2-HOPO)2(CAM)2 and 3,4,3-LI(CAM)2(1,2-HOPO)2. Coordination-based luminescence studies were carried out with Eu3+ and Tb3+ to begin probing the properties of the new ligand architecture and revealed higher sensitization efficiency with the spermine scaffold as well as different spectroscopic features among the structural peptoid isomers. Solution thermodynamic properties of selected ligands revealed different coordination properties between the spermine and peptoid analogues with Eu3+ stability constants log β110 ranging from 28.88 ± 3.45 to 43.97 ± 0.49. The general synthetic strategy presented here paves the way for precision design of new specific and versatile ligands, with a variety of applications tailored towards the use of f-elements, including separations, optical device optimization, and pharmaceutical development.
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Affiliation(s)
- Abel Ricano
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA .
| | - Ilya Captain
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA .
| | - Korey P Carter
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA .
| | - Bryan P Nell
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA .
| | - Gauthier J-P Deblonde
- 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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37
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Götzke L, Schaper G, März J, Kaden P, Huittinen N, Stumpf T, Kammerlander KK, Brunner E, Hahn P, Mehnert A, Kersting B, Henle T, Lindoy LF, Zanoni G, Weigand JJ. Coordination chemistry of f-block metal ions with ligands bearing bio-relevant functional groups. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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38
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Deblonde GJP, Lohrey TD, Abergel RJ. Inducing selectivity and chirality in group IV metal coordination with high-denticity hydroxypyridinones. Dalton Trans 2019; 48:8238-8247. [PMID: 31094380 DOI: 10.1039/c9dt01031a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The solution- and solid-state interactions between the octadentate siderophore mimic 3,4,3-LI(1,2-HOPO) (343HOPO) and group IV metal ions were investigated using high-resolution mass spectrometry, liquid chromatography, UV-visible spectrophotometry, metal-competition batch titrations, and single crystal X-ray diffraction. 343HOPO forms a neutral 1 : 1 complex, [HfIV343HOPO], that exhibits extreme stability in aqueous solution, with a log β110 value reaching 42.3. These results affirm the remarkable charge-based selectivity of 343HOPO for octacoordinated tetravalent cations with a Hf(iv) complex 1021 more stable than its Lu(iii) analogue. Moreover, [HfIV343HOPO] and its Zr(iv) counterpart show exceptional robustness, with the ligand remaining bound to the cation over a very broad pH range: from pH ∼ 11 to acidic conditions as strong as 10 M HCl. In stark contrast, Ti(iv)-343HOPO species are far less stable and undergo hydrolysis at pH as low as ∼6, likely due to the mismatch between the preferred hexacoordinated Ti(iv) ion and octadentate 343HOPO ligand. The extreme charge-based and denticity-driven selectivity of 343HOPO, now observed across the periodic table, paves the way for new selective sequestration systems for radionuclides including medical 44Ti, 89Zr or 177Lu/Hf isotopes, toxic polonium (Po) contaminants, as well as rutherfordium (Rf) research isotopes. Furthermore, despite the lack of a chiral center in 343HOPO, its complexes with metal ions are chiral and appear to form a single set of enantiomers.
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Affiliation(s)
- Gauthier J-P Deblonde
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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39
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Sadhu B, Mishra V. The coordination chemistry of lanthanide and actinide metal ions with hydroxypyridinone-based decorporation agents: orbital and density based analyses. Dalton Trans 2018; 47:16603-16615. [PMID: 30417921 DOI: 10.1039/c8dt03262a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the context of the mitigation of the biological effects of internal radionuclide contamination and for efficient decorporation, the design and development of efficient chelators for lanthanide and actinide metal ions has become a central issue. The pioneering work of Raymond and coworkers (Chem. Rev., 2003, 103, 4207-4282) led to the development of siderophore-related hydroxypyridinonate ligands for possible treatment of internalized radionuclides. However, the structure-function relationship of Ln/An bound to these ligands, particularly the bonding and coordination aspects are not clearly understood at the atomic level. Here, we have investigated the structure, binding and energetics of trivalent and tetravalent Ln/An (Sm3+, Eu3+, Am3+, Cm3+, Th4+, Pu4+) ions with spermine-based octadentate hydroxypyridinonate chelators, namely 3,4,3-LI(1,2-HOPO) and its 3,3,3 variant, using relativistic density functional theory (DFT). Furthermore, we have performed orbital and density based analyses to elucidate the nature of bonding in these complexes. In accordance with the experimental stability constant, we found the maximum binding free energy for An4+ (Pu4+, Th4+) as compared to trivalent metal ions. CDA and ECDA analyses along with orbital-based population analyses confirmed the higher ligand to metal charge transfer for An4+ than for trivalent metal ions. Furthermore, the aromaticity index analysis suggested the presence of crucial chelatoaromatic stabilization for all these metal ions with the maximum for An4+. QTAIM descriptors indicated that the binding of An/Ln with the hard oxygen donor of the ligands is of the donor-acceptor type but a higher degree of covalency exists for actinides as compared to lanthanides. Furthermore, QTAIM and molecular orbital analysis confirmed that such covalency is of the energy-driven type and strictly originates from the orbital mixing event of An-5f orbitals with the ligand orbitals.
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Affiliation(s)
- Biswajit Sadhu
- Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
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40
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Kelley MP, Deblonde GJP, Su J, Booth CH, Abergel RJ, Batista ER, Yang P. Bond Covalency and Oxidation State of Actinide Ions Complexed with Therapeutic Chelating Agent 3,4,3-LI(1,2-HOPO). Inorg Chem 2018; 57:5352-5363. [DOI: 10.1021/acs.inorgchem.8b00345] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Morgan P. Kelley
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States
| | - Gauthier J.-P. Deblonde
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jing Su
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States
| | - Corwin H. Booth
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rebecca J. Abergel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Enrique R. Batista
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States
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41
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Galley SS, Arico AA, Lee TH, Deng X, Yao YX, Sperling JM, Proust V, Storbeck JS, Dobrosavljevic V, Neu JN, Siegrist T, Baumbach RE, Albrecht-Schmitt TE, Kaltsoyannis N, Lanatà N. Uncovering the Origin of Divergence in the CsM(CrO4)2 (M = La, Pr, Nd, Sm, Eu; Am) Family through Examination of the Chemical Bonding in a Molecular Cluster and by Band Structure Analysis. J Am Chem Soc 2018; 140:1674-1685. [DOI: 10.1021/jacs.7b09474] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shane S. Galley
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Alexandra A. Arico
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Tsung-Han Lee
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08856-8019, United States
| | - Xiaoyu Deng
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08856-8019, United States
| | - Yong-Xin Yao
- Department of Physics and Astronomy, and Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011, United States
| | - Joseph M. Sperling
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Vanessa Proust
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Julia S. Storbeck
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Vladimir Dobrosavljevic
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Jennifer N. Neu
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
- Department of Chemical Engineering, Florida State University, Tallahassee, Florida 32310, United States
| | - Theo Siegrist
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
- Department of Chemical Engineering, Florida State University, Tallahassee, Florida 32310, United States
| | - Ryan E. Baumbach
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Thomas E. Albrecht-Schmitt
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Nikolas Kaltsoyannis
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Nicola Lanatà
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
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42
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Deblonde GJP, Lohrey TD, An DD, Abergel RJ. Toxic heavy metal – Pb, Cd, Sn – complexation by the octadentate hydroxypyridinonate ligand archetype 3,4,3-LI(1,2-HOPO). NEW J CHEM 2018. [DOI: 10.1039/c7nj04559j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The toxicity of heavy metals such as lead (Pb), cadmium (Cd) and tin (Sn) has long been known but accidental exposures of large populations to these elements remain unfortunately a topical issue.
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Affiliation(s)
| | - Trevor D. Lohrey
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemistry
| | - Dahlia D. An
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Rebecca J. Abergel
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Nuclear Engineering
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43
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Carter KP, Jian J, Pyrch MM, Forbes TZ, Eaton TM, Abergel RJ, de Jong WA, Gibson JK. Reductive activation of neptunyl and plutonyl oxo species with a hydroxypyridinone chelating ligand. Chem Commun (Camb) 2018; 54:10698-10701. [DOI: 10.1039/c8cc05626a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Neptunyl(vi) and plutonyl(vi) oxo-activation with reduction to tetravalent hydroxides was investigated in gas and condensed phases, and by density functional theory.
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Affiliation(s)
- Korey P. Carter
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Jiwen Jian
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | | | | | - Teresa M. Eaton
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Rebecca J. Abergel
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Nuclear Engineering
| | - Wibe A. de Jong
- Computational Research Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - John K. Gibson
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
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44
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Bogie PM, Lyon Y, Holloway LR, Julian RR, Hooley RJ. Metal-selective coordination and enhanced fluorescence of a self-assembling ligand scaffold. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1347261] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Paul M. Bogie
- Department of Chemistry and the UCR Center for Catalysis, University of California - Riverside, Riverside, CA, USA
| | - Yana Lyon
- Department of Chemistry and the UCR Center for Catalysis, University of California - Riverside, Riverside, CA, USA
| | - Lauren R. Holloway
- Department of Chemistry and the UCR Center for Catalysis, University of California - Riverside, Riverside, CA, USA
| | - Ryan R. Julian
- Department of Chemistry and the UCR Center for Catalysis, University of California - Riverside, Riverside, CA, USA
| | - Richard J. Hooley
- Department of Chemistry and the UCR Center for Catalysis, University of California - Riverside, Riverside, CA, USA
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45
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Chelation and stabilization of berkelium in oxidation state +IV. Nat Chem 2017; 9:843-849. [PMID: 28837177 DOI: 10.1038/nchem.2759] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Accepted: 03/02/2017] [Indexed: 11/09/2022]
Abstract
Berkelium (Bk) has been predicted to be the only transplutonium element able to exhibit both +III and +IV oxidation states in solution, but evidence of a stable oxidized Bk chelate has so far remained elusive. Here we describe the stabilization of the heaviest 4+ ion of the periodic table, under mild aqueous conditions, using a siderophore derivative. The resulting Bk(IV) complex exhibits luminescence via sensitization through an intramolecular antenna effect. This neutral Bk(IV) coordination compound is not sequestered by the protein siderocalin-a mammalian metal transporter-in contrast to the negatively charged species obtained with neighbouring trivalent actinides americium, curium and californium (Cf). The corresponding Cf(III)-ligand-protein ternary adduct was characterized by X-ray diffraction analysis. Combined with theoretical predictions, these data add significant insight to the field of transplutonium chemistry, and may lead to innovative Bk separation and purification processes.
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46
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Pandya DN, Bhatt N, Yuan H, Day CS, Ehrmann BM, Wright M, Bierbach U, Wadas TJ. Zirconium tetraazamacrocycle complexes display extraordinary stability and provide a new strategy for zirconium-89-based radiopharmaceutical development. Chem Sci 2017; 8:2309-2314. [PMID: 28451334 PMCID: PMC5363373 DOI: 10.1039/c6sc04128k] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 12/12/2016] [Indexed: 11/21/2022] Open
Abstract
We report our initial investigations into the use of tetraazamacrocycles as zirconium-89 chelators. We describe the synthesis and complete characterization of several Zr tetraazamacrocycle complexes, and definitively describe the first crystal structure of zirconium 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (Zr-DOTA) using single crystal X-ray diffraction analysis. After evaluating several radioactive analogs, we found that 89Zr-DOTA is superior to 89Zr-DFO, the only 89Zr-complex to be used clinically in 89Zr-radiopharmaceutical applications. Finally, we provide a rationale for the unanticipated and extraordinary stability of these complexes in vitro and in vivo. These results may inform the development of safer and more robust immuno-PET agents for precision medicine applications.
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Affiliation(s)
- Darpan N Pandya
- Department of Cancer Biology , Wake Forest School of Medicine , Winston-Salem , NC 27157 , USA . ;
| | - Nikunj Bhatt
- Department of Cancer Biology , Wake Forest School of Medicine , Winston-Salem , NC 27157 , USA . ;
| | - Hong Yuan
- Department of Radiology , University of North Carolina at Chapel Hill , Chapel Hill , NC 27599 , USA
| | - Cynthia S Day
- Department of Chemistry , Wake Forest University , Winston-Salem , NC 27109 , USA
| | - Brandie M Ehrmann
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , NC 27599 , USA
| | - Marcus Wright
- Department of Chemistry , Wake Forest University , Winston-Salem , NC 27109 , USA
| | - Ulrich Bierbach
- Department of Chemistry , Wake Forest University , Winston-Salem , NC 27109 , USA
| | - Thaddeus J Wadas
- Department of Cancer Biology , Wake Forest School of Medicine , Winston-Salem , NC 27157 , USA . ;
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47
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Captain I, Deblonde GJP, Rupert PB, An DD, Illy MC, Rostan E, Ralston CY, Strong RK, Abergel RJ. Engineered Recognition of Tetravalent Zirconium and Thorium by Chelator-Protein Systems: Toward Flexible Radiotherapy and Imaging Platforms. Inorg Chem 2016; 55:11930-11936. [PMID: 27802058 DOI: 10.1021/acs.inorgchem.6b02041] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Targeted α therapy holds tremendous potential as a cancer treatment: it offers the possibility of delivering a highly cytotoxic dose to targeted cells while minimizing damage to surrounding healthy tissue. The metallic α-generating radioisotopes 225Ac and 227Th are promising radionuclides for therapeutic use, provided adequate chelation and targeting. Here we demonstrate a new chelating platform composed of a multidentate high-affinity oxygen-donating ligand 3,4,3-LI(CAM) bound to the mammalian protein siderocalin. Respective stability constants log β110 = 29.65 ± 0.65, 57.26 ± 0.20, and 47.71 ± 0.08, determined for the EuIII (a lanthanide surrogate for AcIII), ZrIV, and ThIV complexes of 3,4,3-LI(CAM) through spectrophotometric titrations, reveal this ligand to be one of the most powerful chelators for both trivalent and tetravalent metal ions at physiological pH. The resulting metal-ligand complexes are also recognized with extremely high affinity by the siderophore-binding protein siderocalin, with dissociation constants below 40 nM and tight electrostatic interactions, as evidenced by X-ray structures of the protein:ligand:metal adducts with ZrIV and ThIV. Finally, differences in biodistribution profiles between free and siderocalin-bound 238PuIV-3,4,3-LI(CAM) complexes confirm in vivo stability of the protein construct. The siderocalin:3,4,3-LI(CAM) assembly can therefore serve as a "lock" to consolidate binding to the therapeutic 225Ac and 227Th isotopes or to the positron emission tomography emitter 89Zr, independent of metal valence state.
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Affiliation(s)
- Ilya Captain
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Gauthier J-P Deblonde
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Peter B Rupert
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center , Seattle, Washington 98109, United States
| | - Dahlia D An
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Marie-Claire Illy
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Emeline Rostan
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Corie Y Ralston
- Berkeley Center for Structural Biology, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Roland K Strong
- Division of Basic Sciences, Fred Hutchinson Cancer Research Center , Seattle, Washington 98109, United States
| | - Rebecca J Abergel
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
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48
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Pham TA, Altman AB, Stieber SCE, Booth CH, Kozimor SA, Lukens WW, Olive DT, Tyliszczak T, Wang J, Minasian SG, Raymond KN. A Macrocyclic Chelator That Selectively Binds Ln4+ over Ln3+ by a Factor of 1029. Inorg Chem 2016; 55:9989-10002. [DOI: 10.1021/acs.inorgchem.6b00684] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tiffany A. Pham
- University of California, Berkeley, California 94720, United States
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
| | - Alison B. Altman
- University of California, Berkeley, California 94720, United States
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
| | - S. Chantal E. Stieber
- Los Alamos National Laboratory (LANL), Los
Alamos, New Mexico 87545, United States
- California State Polytechnic University, Pomona, California 91768, United States
| | - Corwin H. Booth
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
| | - Stosh A. Kozimor
- Los Alamos National Laboratory (LANL), Los
Alamos, New Mexico 87545, United States
| | - Wayne W. Lukens
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
| | - Daniel T. Olive
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
| | - Tolek Tyliszczak
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
| | - Jian Wang
- Canadian Light Source (CLS), Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Stefan G. Minasian
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
| | - Kenneth N. Raymond
- University of California, Berkeley, California 94720, United States
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, California 94720, United States
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49
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Deri MA, Ponnala S, Kozlowski P, Burton-Pye BP, Cicek HT, Hu C, Lewis JS, Francesconi LC. p-SCN-Bn-HOPO: A Superior Bifunctional Chelator for (89)Zr ImmunoPET. Bioconjug Chem 2015; 26:2579-91. [PMID: 26550847 DOI: 10.1021/acs.bioconjchem.5b00572] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Zirconium-89 has an ideal half-life for use in antibody-based PET imaging; however, when used with the chelator DFO, there is an accumulation of radioactivity in the bone, suggesting that the (89)Zr(4+) cation is being released in vivo. Therefore, a more robust chelator for (89)Zr could reduce the in vivo release and the dose to nontarget tissues. Evaluation of the ligand 3,4,3-(LI-1,2-HOPO) demonstrated efficient binding of (89)Zr(4+) and high stability; therefore, we developed a bifunctional derivative, p-SCN-Bn-HOPO, for conjugation to an antibody. A Zr-HOPO crystal structure was obtained showing that the Zr is fully coordinated by the octadentate HOPO ligand, as expected, forming a stable complex. p-SCN-Bn-HOPO was synthesized through a novel pathway. Both p-SCN-Bn-HOPO and p-SCN-Bn-DFO were conjugated to trastuzumab and radiolabeled with (89)Zr. Both complexes labeled efficiently and achieved specific activities of approximately 2 mCi/mg. PET imaging studies in nude mice with BT474 tumors (n = 4) showed good tumor uptake for both compounds, but with a marked decrease in bone uptake for the (89)Zr-HOPO-trastuzumab images. Biodistribution data confirmed the lower bone activity, measuring 17.0%ID/g in the bone at 336 h for (89)Zr-DFO-trastuzumab while (89)Zr-HOPO-trastuzumab only had 2.4%ID/g. We successfully synthesized p-SCN-Bn-HOPO, a bifunctional derivative of 3,4,3-(LI-1,2-HOPO) as a potential chelator for (89)Zr. In vivo studies demonstrate the successful use of (89)Zr-HOPO-trastuzumab to image BT474 breast cancer with low background, good tumor to organ contrast, and, importantly, very low bone uptake. The reduced bone uptake seen with (89)Zr-HOPO-trastuzumab suggests superior stability of the (89)Zr-HOPO complex.
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Affiliation(s)
- Melissa A Deri
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States.,Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York , 365 Fifth Ave, New York, New York 10016, United States
| | - Shashikanth Ponnala
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States.,Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Paul Kozlowski
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States.,Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Benjamin P Burton-Pye
- Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Huseyin T Cicek
- Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Chunhua Hu
- Department of Chemistry, New York University , 100 Washington Square East, New York, New York 10003, United States
| | - Jason S Lewis
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States
| | - Lynn C Francesconi
- Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York , 365 Fifth Ave, New York, New York 10016, United States
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50
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Siderocalin-mediated recognition, sensitization, and cellular uptake of actinides. Proc Natl Acad Sci U S A 2015; 112:10342-7. [PMID: 26240330 DOI: 10.1073/pnas.1508902112] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Synthetic radionuclides, such as the transuranic actinides plutonium, americium, and curium, present severe health threats as contaminants, and understanding the scope of the biochemical interactions involved in actinide transport is instrumental in managing human contamination. Here we show that siderocalin, a mammalian siderophore-binding protein from the lipocalin family, specifically binds lanthanide and actinide complexes through molecular recognition of the ligands chelating the metal ions. Using crystallography, we structurally characterized the resulting siderocalin-transuranic actinide complexes, providing unprecedented insights into the biological coordination of heavy radioelements. In controlled in vitro assays, we found that intracellular plutonium uptake can occur through siderocalin-mediated endocytosis. We also demonstrated that siderocalin can act as a synergistic antenna to sensitize the luminescence of trivalent lanthanide and actinide ions in ternary protein-ligand complexes, dramatically increasing the brightness and efficiency of intramolecular energy transfer processes that give rise to metal luminescence. Our results identify siderocalin as a potential player in the biological trafficking of f elements, but through a secondary ligand-based metal sequestration mechanism. Beyond elucidating contamination pathways, this work is a starting point for the design of two-stage biomimetic platforms for photoluminescence, separation, and transport applications.
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