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Gamboni G, Belpassi L, Belanzoni P. The Chemical Bond at the Bottom of the Periodic Table: The Case of the Heavy Astatine and the Super-Heavy Tennessine. Chemphyschem 2024; 25:e202400310. [PMID: 38708605 DOI: 10.1002/cphc.202400310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Accepted: 05/03/2024] [Indexed: 05/07/2024]
Abstract
In this work, we study the chemical bond in molecules containing heavy and super-heavy elements according to the current state-of-the-art bonding models. An Energy Decomposition Analysis in combination with Natural Orbital for Chemical Valence (EDA-NOCV) within the relativistic four-component Dirac-Kohn-Sham (DKS) framework is employed, which allows to successfully include the spin-orbit coupling (SOC) effects on the chemical bond description. Simple halogen-bonded adducts ClX⋯L (X=At, Ts; L=NH3, Br-, H2O, CO) of astatine and tennessine have been selected to assess a trend on descending along a group, while modulating the ClX⋯L bond features through the different electronic nature of the ligand L. Interesting effects caused by SOC have been revealed: i) a huge increase of the ClTs dipole moment (which is almost twice as that of ClAt), ii) a lowering of the ClX⋯L bonding energy arising from different contributions to the ClX…L interaction energy strongly depending on the nature of L, iii) a quenching of one of the π back-donation components to the bond. In the ClTs(CO) adduct, the back-donation from ClTs to CO becomes the most important component. The analysis of the electronic structure of the ClX dimers allows for a clear interpretation of the SOC effects in these systems.
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Affiliation(s)
- Giulia Gamboni
- Department of Chemistry, Biology and Biotechnology, University of Perugia, via Elce di Sotto 8, 06123, Perugia, Italy
| | - Leonardo Belpassi
- CNR Institute of Chemical Science and Technologies "Giulio Natta" (CNR-SCITEC), via Elce di Sotto 8, 06123, Perugia, Italy
| | - Paola Belanzoni
- Department of Chemistry, Biology and Biotechnology, University of Perugia, via Elce di Sotto 8, 06123, Perugia, Italy
- CNR Institute of Chemical Science and Technologies "Giulio Natta" (CNR-SCITEC), via Elce di Sotto 8, 06123, Perugia, Italy
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Roncali L, Marionneau-Lambot S, Roy C, Eychenne R, Gouard S, Avril S, Chouin N, Riou J, Allard M, Rousseau A, Guérard F, Hindré F, Chérel M, Garcion E. Brain intratumoural astatine-211 radiotherapy targeting syndecan-1 leads to durable glioblastoma remission and immune memory in female mice. EBioMedicine 2024; 105:105202. [PMID: 38905749 PMCID: PMC11246004 DOI: 10.1016/j.ebiom.2024.105202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 05/31/2024] [Accepted: 05/31/2024] [Indexed: 06/23/2024] Open
Abstract
BACKGROUND Glioblastoma (GB), the most aggressive brain cancer, remains a critical clinical challenge due to its resistance to conventional treatments. Here, we introduce a locoregional targeted-α-therapy (TAT) with the rat monoclonal antibody 9E7.4 targeting murine syndecan-1 (SDC1) coupled to the α-emitter radionuclide astatine-211 (211At-9E7.4). METHODS We orthotopically transplanted 50,000 GL261 cells of murine GB into the right striatum of syngeneic female C57BL/6JRj mice using stereotaxis. After MRI validation of tumour presence at day 11, TAT was injected at the same coordinates. Biodistribution, efficacy, toxicity, local and systemic responses were assessed following application of this protocol. The 9E7.4 monoclonal antibody was labelled with iodine-125 (125I) for biodistribution and with astatine-211 (211At) for the other experiments. FINDINGS The 211At-9E7.4 TAT demonstrated robust efficacy in reducing orthotopic tumours and achieved improved survival rates in the C57BL/6JRj model, reaching up to 70% with a minimal activity of 100 kBq. Targeting SDC1 ensured the cerebral retention of 211At over an optimal time window, enabling low-activity administration with a minimal toxicity profile. Moreover, TAT substantially reduced the occurrence of secondary tumours and provided resistance to new tumour development after contralateral rechallenge, mediated through the activation of central and effector memory T cells. INTERPRETATION The locoregional 211At-9E7.4 TAT stands as one of the most efficient TAT across all preclinical GB models. This study validates SDC1 as a pertinent therapeutic target for GB and underscores 211At-9E7.4 TAT as a promising advancement to improve the treatment and quality of life for patients with GB. FUNDING This work was funded by the French National Agency for Research (ANR) "France 2030 Investment Plan" Labex Iron [ANR-11-LABX-18-01], The SIRIC ILIAD [INCa-DGOS-INSERM-18011], the French program "Infrastructure d'Avenir en Biologie-Santé" (France Life Imaging) [ANR-11-INBS-0006], the PIA3 of the ANR, integrated to the "France 2030 Investment Plan" [ANR-21-RHUS-0012], and support from Inviscan SAS (Strasbourg, France). It was also related to: the ANR under the frame of EuroNanoMed III (project GLIOSILK) [ANR-19-ENM3-0003-01]; the "Région Pays-de-la-Loire" under the frame of the Target'In project; the "Ligue Nationale contre le Cancer" and the "Comité Départemental de Maine-et-Loire de la Ligue contre le Cancer" (CD49) under the frame of the FusTarG project and the "Tumour targeting, imaging and radio-therapies network" of the "Cancéropôle Grand-Ouest" (France). This work was also funded by the Institut National de la Santé et de la Recherche Médicale (INSERM), the University of Nantes, and the University of Angers.
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Affiliation(s)
- Loris Roncali
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Séverine Marionneau-Lambot
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; CHU Nantes, Nantes Université, Service de médecine nucléaire, F-44000, Nantes, France; CIMA (Centre d'Imagerie Multimodale Appliquée), Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Charlotte Roy
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; PRIMEX (Plateforme de Radiobiologie et d'Imageries Expérimentales), Université d'Angers, SFR 4208, F-49000, Angers, France
| | - Romain Eychenne
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; GIP ARRONAX, F-44160, Saint-Herblain, France
| | - Sébastien Gouard
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; CIMA (Centre d'Imagerie Multimodale Appliquée), Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Sylvie Avril
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France
| | - Nicolas Chouin
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; ONIRIS, F-44000, Nantes, France
| | - Jérémie Riou
- CHU Angers, Université d'Angers, F-49000, Angers, France
| | - Mathilde Allard
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - Audrey Rousseau
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; CHU Angers, Université d'Angers, F-49000, Angers, France
| | - François Guérard
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France
| | - François Hindré
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; PRIMEX (Plateforme de Radiobiologie et d'Imageries Expérimentales), Université d'Angers, SFR 4208, F-49000, Angers, France
| | - Michel Chérel
- Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; CIMA (Centre d'Imagerie Multimodale Appliquée), Nantes Université, INSERM, CNRS, CRCI(2)NA, F-44000, Nantes, France; Institut de Cancérologie de l'Ouest, Service de médecine nucléaire, F-44160, Saint-Herblain, France.
| | - Emmanuel Garcion
- Université d'Angers, INSERM, CNRS, CRCI(2)NA, F-49000, Angers, France; PRIMEX (Plateforme de Radiobiologie et d'Imageries Expérimentales), Université d'Angers, SFR 4208, F-49000, Angers, France; PACEM (Plateforme d'Analyse Cellulaire et Moléculaire), Université d'Angers, SFR 4208, F-49000, Angers, France.
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Tada M, Kaizuka Y, Kannaka K, Suzuki H, Joho T, Takahashi K, Uehara T, Tanaka H. Development of a Neopentyl 211At-Labeled Activated Ester Providing In Vivo Stable 211At-Labeled Antibodies for Targeted Alpha Therapy. ChemMedChem 2024:e202400369. [PMID: 38847493 DOI: 10.1002/cmdc.202400369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/06/2024] [Indexed: 08/10/2024]
Abstract
In this study we developed a neopentyl 211At-labeled activated ester that incorporates a triazole spacer and applied it to the synthesis of an 211At-labeled cetuximab. The activated ester was synthesized via the nucleophilic 211At-astatination of a neopentyl sulfonate carrying two long alkyl chains that serve as a lipid tag, which was followed by the hydrolysis of an acetal. Additionally, we developed a novel Resin-Assisted Purification and Deprotection (RAPD) protocol involving a solid-phase extraction of the protected 211At-labeled compound from the mixture of the labeling reaction, hydrolysis of the acetal on the resin, and finally an elution of the 211At-labeled activator from the resin. This method allows the synthesis of an 211At-labeled activated ester with high purity through a simplified procedure that circumvents the need for HPLC purification. Using this 211At-labeled activated ester, we efficiently synthesized 211At-labeled cetuximab in 27±1 % radiochemical yield with 95 % radiochemical purity. This 211At-activated ester demonstrated high reactivity, and enabled the completion of the reaction with the antibody within 10 min. In comparative biodistribution studies between 211At-labeled cetuximab and the corresponding 125I-labeled cetuximab in normal mice, both the thyroid and stomach showed radioactivity levels that were less than 1.0 % of the injected dose.
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Affiliation(s)
- Masatoshi Tada
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 12-12-1-H101 Ookayama, Meguro, Tokyo, 152-8552, Japan
| | - Yuta Kaizuka
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Kento Kannaka
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Hiroyuki Suzuki
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Taiki Joho
- Advanced Clinical Research Center, Fukushima Global Medical Science Center, Fukushima Medical University, 1 Hikariga-oka, Fukushima, 960-1295, Japan
| | - Kazuhiro Takahashi
- Advanced Clinical Research Center, Fukushima Global Medical Science Center, Fukushima Medical University, 1 Hikariga-oka, Fukushima, 960-1295, Japan
| | - Tomoya Uehara
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Hiroshi Tanaka
- Faculty of Pharmacy, Juntendo University, 6-8-1 Hinode, Urayasu, Chiba, 279-0013, Japan
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 12-12-1-H101 Ookayama, Meguro, Tokyo, 152-8552, Japan
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4
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Aneheim E, Hansson E, Timperanza C, Jensen H, Lindegren S. Behaviour, use and safety aspects of astatine-211 solvated in chloroform after dry distillation recovery. Sci Rep 2024; 14:9698. [PMID: 38678056 PMCID: PMC11055885 DOI: 10.1038/s41598-024-60615-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 04/25/2024] [Indexed: 04/29/2024] Open
Abstract
Targeted alpha therapy of disseminated cancer is an emerging technique where astatine-211 is one of the most promising candidate nuclides. Astatine-211 can be produced in medium energy cyclotrons by alpha particle bombardment of natural bismuth. The produced astatine is then commonly recovered from the irradiated solid target material through dry distillation. The dry distillation process often includes elution and solvation of condensed astatine with chloroform, forming Chloroform Eluate. In this work the handling and safe use of the high activity concentration Chloroform Eluate has been investigated. Correctly performed, evaporation of Chloroform Eluate results in a dry residue with complete recovery of the astatine. The dry residue can then serve as a versatile starting material, using appropriate oxidizing or reducing conditions, for subsequent downstream chemistry. However, it has been found that when evaporating the Chloroform Eluate, astatine can be volatilized if continuing the process beyond the point of dryness. This behavior is more pronounced when the Chloroform Eluate has received a higher absorbed dose. Upon water phase contact of the Chloroform Eluate, a major part of the astatine activity becomes water soluble, leaving the organic phase. A behavior which is also dependent on dose to the solvent.
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Affiliation(s)
- Emma Aneheim
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 41345, Gothenburg, Sweden.
- Department of Oncology, Region Västra Götaland, Sahlgrenska University Hospital, 41345, Gothenburg, Sweden.
| | - Ellinor Hansson
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 41345, Gothenburg, Sweden
- Atley Solutions AB, 41327, Gothenburg, Sweden
| | - Chiara Timperanza
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 41345, Gothenburg, Sweden
| | - Holger Jensen
- Department of Clinical Physiology and Nuclear Medicine, Cyclotron and Radiochemistry unit, Copenhagen University Hospital, 2100, Copenhagen, Denmark
| | - Sture Lindegren
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 41345, Gothenburg, Sweden
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Burgers PC, Zeneyedpour L, Luider TM, Holmes JL. Estimation of thermodynamic and physicochemical properties of the alkali astatides: On the bond strength of molecular astatine (At 2 ) and the hydration enthalpy of astatide (At - ). JOURNAL OF MASS SPECTROMETRY : JMS 2024; 59:e5010. [PMID: 38488842 DOI: 10.1002/jms.5010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/29/2024] [Accepted: 02/01/2024] [Indexed: 03/17/2024]
Abstract
The recent accurate and precise determination of the electron affinity (EA) of the astatine atom At0 warrants a re-investigation of the estimated thermodynamic properties of At0 and astatine containing molecules as this EA was found to be much lower (by 0.4 eV) than previous estimated values. In this contribution we estimate, from available data sources, the following thermodynamic and physicochemical properties of the alkali astatides (MAt, M = Li, Na, K, Rb, Cs): their solid and gaseous heats of formation, lattice and gas-phase binding enthalpies, sublimation energies and melting temperatures. Gas-phase charge-transfer dissociation energies for the alkali astatides (the energy requirement for M+ At- ➔ M0 + At0 ) have been obtained and are compared with those for the other alkali halides. Use of Born-Haber cycles together with the new AE (At0 ) value allows the re-evaluation of ΔHf (At0 )g (=56 ± 5 kJ/mol); it is concluded that (At2 )g is a weakly bonded species (bond strength <50 kJ/mol), significantly weaker bonded than previously estimated (116 kJ/mol) and much weaker bonded than I2 (148 kJ/mol), but in agreement with the finding from theory that spin-orbit coupling considerably reduces the bond strength in At2 . The hydration enthalpy (ΔHaq ) of At- is estimated to be -230 ± 2 kJ/mol (using ΔHaq [H+ ] = -1150.1 kJ/mol), in good agreement with molecular dynamics calculations. Arguments are presented that the largest alkali halide, CsAt, like the smallest, LiF, will be only sparingly soluble in water, following the generalization from hard/soft acid/base principles that "small likes small" and "large likes large."
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Affiliation(s)
- Peter C Burgers
- Department of Neurology, Laboratory of Neuro-Oncology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Lona Zeneyedpour
- Department of Neurology, Laboratory of Neuro-Oncology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Theo M Luider
- Department of Neurology, Laboratory of Neuro-Oncology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - John L Holmes
- Department of Chemistry and Biological Sciences, University of Ottawa, Ottawa, Canada
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6
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Yssartier T, Liu L, Pardoue S, Le Questel JY, Guérard F, Montavon G, Galland N. In vivo stability of 211At-radiopharmaceuticals: on the impact of halogen bond formation. RSC Med Chem 2024; 15:223-233. [PMID: 38283213 PMCID: PMC10809332 DOI: 10.1039/d3md00579h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 11/22/2023] [Indexed: 01/30/2024] Open
Abstract
211At, when coupled to a targeting agent, is one of the most promising radionuclides for therapeutic applications. The main labelling approach consists in the formation of astatoaryl compounds, which often show a lack of in vivo stability. The hypothesis that halogen bond (XB) interactions with protein functional groups initiate a deastatination mechanism is investigated through radiochemical experiments and DFT modelling. Several descriptors agree on the known mechanism of iodoaryl substrates dehalogenation by iodothyronine deiodinases, supporting the higher in vivo dehalogenation of N-succinimidyl 3-[211At]astatobenzoate (SAB) conjugates in comparison with their iodinated counterparts. The guanidinium group in 3-[211At]astato-4-guanidinomethylbenzoate (SAGMB) prevents the formation of At-mediated XBs with the selenocysteine active site in iodothyronine deiodinases. The initial step of At-aryl bond dissociation is inhibited, elucidating the better in vivo stability of SAGMB conjugates compared with those of SAB. The impact of astatine's ability to form XB interactions on radiopharmaceutical degradation may not be limited to the case of aryl radiolabeling.
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Affiliation(s)
- Thibault Yssartier
- CNRS, CEISAM UMR 6230, Nantes Université F-44000 Nantes France
- CNRS, SUBATECH UMR 6457, IMT Atlantique F-44307 Nantes France
| | - Lu Liu
- CNRS, IPHC UMR 7178, Université de Strasbourg F-67037 Strasbourg France
| | - Sylvain Pardoue
- CNRS, SUBATECH UMR 6457, IMT Atlantique F-44307 Nantes France
| | | | - François Guérard
- Inserm UMR 1307, CNRS UMR 6075, CRCI2NA, Nantes Université, Université d'Angers F-44000 Nantes France
| | - Gilles Montavon
- CNRS, SUBATECH UMR 6457, IMT Atlantique F-44307 Nantes France
| | - Nicolas Galland
- CNRS, CEISAM UMR 6230, Nantes Université F-44000 Nantes France
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7
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Ghosh S, Lee SJ, Hsu JC, Chakraborty S, Chakravarty R, Cai W. Cancer Brachytherapy at the Nanoscale: An Emerging Paradigm. CHEMICAL & BIOMEDICAL IMAGING 2024; 2:4-26. [PMID: 38274040 PMCID: PMC10806911 DOI: 10.1021/cbmi.3c00092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 10/09/2023] [Accepted: 11/01/2023] [Indexed: 01/27/2024]
Abstract
Brachytherapy is an established treatment modality that has been globally utilized for the therapy of malignant solid tumors. However, classic therapeutic sealed sources used in brachytherapy must be surgically implanted directly into the tumor site and removed after the requisite period of treatment. In order to avoid the trauma involved in the surgical procedures and prevent undesirable radioactive distribution at the cancerous site, well-dispersed radiolabeled nanomaterials are now being explored for brachytherapy applications. This emerging field has been coined "nanoscale brachytherapy". Despite present-day advancements, an ongoing challenge is obtaining an advanced, functional nanomaterial that concurrently incorporates features of high radiolabeling yield, short labeling time, good radiolabeling stability, and long tumor retention time without leakage of radioactivity to the nontargeted organs. Further, attachment of suitable targeting ligands to the nanoplatforms would widen the nanoscale brachytherapy approach to tumors expressing various phenotypes. Molecular imaging using radiolabeled nanoplatforms enables noninvasive visualization of cellular functions and biological processes in vivo. In vivo imaging also aids in visualizing the localization and retention of the radiolabeled nanoplatforms at the tumor site for the requisite time period to render safe and effective therapy. Herein, we review the advancements over the last several years in the synthesis and use of functionalized radiolabeled nanoplatforms as a noninvasive substitute to standard brachytherapy sources. The limitations of present-day brachytherapy sealed sources are analyzed, while highlighting the advantages of using radiolabeled nanoparticles (NPs) for this purpose. The recent progress in the development of different radiolabeling methods, delivery techniques and nanoparticle internalization mechanisms are discussed. The preclinical studies performed to date are summarized with an emphasis on the current challenges toward the future translation of nanoscale brachytherapy in routine clinical practices.
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Affiliation(s)
- Sanchita Ghosh
- Radiopharmaceuticals
Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi
Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Sophia J. Lee
- Departments
of Radiology and Medical Physics, University
of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Jessica C. Hsu
- Departments
of Radiology and Medical Physics, University
of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Sudipta Chakraborty
- Radiopharmaceuticals
Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi
Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Rubel Chakravarty
- Radiopharmaceuticals
Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi
Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Weibo Cai
- Departments
of Radiology and Medical Physics, University
of Wisconsin-Madison, Madison, Wisconsin 53705, United States
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8
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Rueda Espinosa KJ, Kananenka AA, Rusakov AA. Novel Computational Chemistry Infrastructure for Simulating Astatide in Water: From Basis Sets to Force Fields Using Particle Swarm Optimization. J Chem Theory Comput 2023; 19:7998-8012. [PMID: 38014419 DOI: 10.1021/acs.jctc.3c00826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Using the example of astatine, the heaviest naturally occurring halogen whose isotope At-211 has promising medical applications, we propose a new infrastructure for large-scale computational models of heavy elements with strong relativistic effects. In particular, we focus on developing an accurate force field for At- in water based on reliable relativistic density functional theory (DFT) calculations. To ensure the reliability of such calculations, we design novel basis sets for relativistic DFT, via the particle swarm optimization algorithm to optimize the coefficients of the new basis sets and the polarization-consistent basis set idea's extension to heavy elements to eliminate the basis set error from DFT calculations. The resulting basis sets enable the well-grounded evaluation of relativistic DFT against "gold-standard" CCSD(T) results. Accounting for strong relativistic effects, including spin-orbit interaction, via our redesigned infrastructure, we elucidate a noticeable dissimilarity between At- and I- in halide-water force field parameters, radial distribution functions, diffusion coefficients, and hydration energies. This work establishes the framework for the systematic development of polarization-consistent basis sets for relativistic DFT and accurate force fields for molecular dynamics simulations to be used in large-scale models of complex molecular systems with elements from the bottom of the periodic table, including actinides and even superheavy elements.
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Affiliation(s)
- Kennet J Rueda Espinosa
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, United States
| | - Alexei A Kananenka
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, United States
| | - Alexander A Rusakov
- Department of Chemistry, Oakland University, Rochester, Michigan 48309, United States
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9
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Sasaki I, Tada M, Liu Z, Tatsuta M, Okura T, Aoki M, Takahashi K, Ishioka NS, Watanabe S, Tanaka H. 1-( N, N-Dialkylcarbamoyl)-1,1-difluoromethanesulfonyl ester as a stable and effective precursor for a neopentyl labeling group with astatine-211. Org Biomol Chem 2023; 21:7467-7472. [PMID: 37670575 DOI: 10.1039/d3ob00944k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Radiohalogens with a short half-life are useful radioisotopes for radiotheranostics. Astatine-211 is an α-emitting radiohalogen and is expected to be applicable to targeted α therapy. A neopentyl labeling group is an effective hydrophilic labeling unit for various radiohalogens, which includes 211At. In this study, a 1-(N,N-dialkylcarbamoyl)-1,1-difluoromethanesulfonyl (CDf) ester was developed as a stable precursor for labeling with 211At, 77Br and 125I through a neopentyl labeling group. The CDf ester remained stable in an acetonitrile solution at room temperature and enabled the successful syntheses of 211At-labeled compounds in a highly radiochemical conversion in the presence of K2CO3. 77Br- and 125I-labeled compounds can be prepared from the CDf ester without a base. The utility of the CDf ester was demonstrated in the synthesis of a benzylguanidine with a neopentyl 211At-labeling group. The developed method afforded a 32% radiochemical yield of 211At-labeled benzylguanidine. However, a partial deastatination was observed under acidic conditions during the removal of an N-Boc protecting group. Deprotecting these groups under milder acidic conditions may improve the radiochemical yield. In conclusion, the CDf ester facilitates the syntheses of 211At, 125I and 77Br-labeled compounds that use a neopentyl labeling group for radiotheranostic applications. Further optimization of protecting groups and reaction conditions should enhance the total radiochemical yield of the 211At-labeled compounds.
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Affiliation(s)
- Ichiro Sasaki
- Department of Quantum-Applied Biosciences, Takasaki Institute for Advanced Quantum Science National Institutes for Quantum Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan
| | - Masatoshi Tada
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 12-12-1-H101 Ookayama, Meguro, Tokyo, 152-8552, Japan.
| | - Ziyun Liu
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 12-12-1-H101 Ookayama, Meguro, Tokyo, 152-8552, Japan.
| | - Maho Tatsuta
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 12-12-1-H101 Ookayama, Meguro, Tokyo, 152-8552, Japan.
| | - Takeru Okura
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 12-12-1-H101 Ookayama, Meguro, Tokyo, 152-8552, Japan.
| | - Miho Aoki
- Advanced Clinical Research Center, Fukushima Global Medical Science Center, Fukushima Medical University, 1 Hikariga-oka, Fukushima, Fukushima 960-1295, Japan
| | - Kazuhiro Takahashi
- Advanced Clinical Research Center, Fukushima Global Medical Science Center, Fukushima Medical University, 1 Hikariga-oka, Fukushima, Fukushima 960-1295, Japan
| | - Noriko S Ishioka
- Department of Quantum-Applied Biosciences, Takasaki Institute for Advanced Quantum Science National Institutes for Quantum Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan
| | - Shigeki Watanabe
- Department of Quantum-Applied Biosciences, Takasaki Institute for Advanced Quantum Science National Institutes for Quantum Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan
| | - Hiroshi Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 12-12-1-H101 Ookayama, Meguro, Tokyo, 152-8552, Japan.
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10
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Ode Y, Pradipta AR, Ahmadi P, Ishiwata A, Nakamura A, Egawa Y, Kusakari Y, Muguruma K, Wang Y, Yin X, Sato N, Haba H, Tanaka K. Therapeutic efficacy of 211At-radiolabeled 2,6-diisopropylphenyl azide in mouse models of human lung cancer. Chem Sci 2023; 14:8054-8060. [PMID: 37538829 PMCID: PMC10395307 DOI: 10.1039/d3sc02513f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 05/26/2023] [Indexed: 08/05/2023] Open
Abstract
Targeted α-particle therapy (TAT) is an attractive alternative to conventional therapy for cancer treatment. Among the available radionuclides considered for TAT, astatine-211 (211At) attached to a cancer-targeting molecule appears very promising. Previously, we demonstrated that aryl azide derivatives could react selectively with the endogenous acrolein generated by cancer cells to give a diazo compound, which subsequently forms a covalent bond with the organelle of cancer cells in vivo. Herein, we synthesized 211At-radiolabeled 2,6-diisopropylphenyl azide (ADIPA), an α-emitting molecule that can selectively target the acrolein of cancer cells, and investigated its antitumor effect. Our results demonstrate that a single intratumor or intravenous administration of this simple α-emitting molecule to the A549 (human lung cancer) cell-bearing xenograft mouse model, at a low dose (70 kBq), could suppress tumor growth without inducing adverse effects. Furthermore, because acrolein is generally overproduced by most cancer cells, we believe ADIPA is a simple TAT compound that deserves further investigation for application in animal models and humans with various cancer types and stages.
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Affiliation(s)
- Yudai Ode
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology 2-12-1 Ookayama Meguro Tokyo 152-8552 Japan
| | - Ambara R Pradipta
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology 2-12-1 Ookayama Meguro Tokyo 152-8552 Japan
| | - Peni Ahmadi
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research, RIKEN 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Akihiro Ishiwata
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research, RIKEN 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Akiko Nakamura
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research, RIKEN 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Yasuko Egawa
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research, RIKEN 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Yuriko Kusakari
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research, RIKEN 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Kyohei Muguruma
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research, RIKEN 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Yang Wang
- Nuclear Chemistry Research Team, RIKEN Nishina Center for Accelerator-Based Science 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Xiaojie Yin
- Nuclear Chemistry Research Team, RIKEN Nishina Center for Accelerator-Based Science 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Nozomi Sato
- Nuclear Chemistry Research Team, RIKEN Nishina Center for Accelerator-Based Science 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Hiromitsu Haba
- Nuclear Chemistry Research Team, RIKEN Nishina Center for Accelerator-Based Science 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Katsunori Tanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology 2-12-1 Ookayama Meguro Tokyo 152-8552 Japan
- Biofunctional Synthetic Chemistry Laboratory, Cluster for Pioneering Research, RIKEN 2-1 Hirosawa, Wako Saitama 351-0198 Japan
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11
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Uemura M, Watabe T, Hoshi S, Tanji R, Yaginuma K, Kojima Y. The current status of prostate cancer treatment and PSMA theranostics. Ther Adv Med Oncol 2023; 15:17588359231182293. [PMID: 37424944 PMCID: PMC10328176 DOI: 10.1177/17588359231182293] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 05/24/2023] [Indexed: 07/11/2023] Open
Abstract
In the treatment of cancer, understanding the disease status, or accurate staging, is extremely important, and various imaging techniques are used. Computed tomography (CT), magnetic resonance imaging, and scintigrams are commonly used for solid tumors, and advances in these technologies have improved the accuracy of diagnosis. In the clinical practice of prostate cancer, CT and bone scans have been considered especially important for detecting metastases. Nowadays, CT and bone scans are called conventional methods because positron emission tomography (PET), especially prostate-specific membrane antigen (PSMA)/PET, is extremely sensitive in detecting metastases. Advances in functional imaging, such as PET, are advancing the diagnosis of cancer by allowing information to be added to the morphological diagnosis. Furthermore, PSMA is known to be upregulated depending on the malignancy of the prostate cancer grade and resistance to therapy. Therefore, it is often highly expressed in castration-resistant prostate cancer (CRPC) with poor prognosis, and its therapeutic application has been attempted for around two decades. PSMA theranostics refers to a type of cancer treatment that combines both diagnosis and therapy using a PSMA. The theranostic approach uses a radioactive substance attached to a molecule that targets PSMA protein on cancer cells. This molecule is injected into the patient's bloodstream and can be used for both imaging the cancer cells with a PET scan (PSMA PET imaging) and delivering radiation directly to the cancer cells (PSMA-targeted radioligand therapy), with the aim of minimizing damage to healthy tissue. Recently, in an international phase III trial, the impact of 177Lu-PSMA-617 therapy was studied in patients with advanced PSMA-positive metastatic CRPC who had previously been treated with specific inhibitors and regimens. The trial revealed that 177Lu-PSMA-617 significantly extended both progression-free survival and overall survival compared to standard care alone. Although there was a higher incidence of grade 3 or above adverse events with 177Lu-PSMA-617, it did not negatively impact the patients' quality of life. PSMA theranostics is currently being studied and used primarily for the treatment of prostate cancer, but it has the potential to be applied to other types of cancers as well.
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Affiliation(s)
| | - Tadashi Watabe
- Department of Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Seiji Hoshi
- Department of Urology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Ryo Tanji
- Department of Urology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Kei Yaginuma
- Department of Urology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Yoshiyuki Kojima
- Department of Urology, Fukushima Medical University School of Medicine, Fukushima, Japan
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12
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Funeh CN, Bridoux J, Ertveldt T, De Groof TWM, Chigoho DM, Asiabi P, Covens P, D'Huyvetter M, Devoogdt N. Optimizing the Safety and Efficacy of Bio-Radiopharmaceuticals for Cancer Therapy. Pharmaceutics 2023; 15:pharmaceutics15051378. [PMID: 37242621 DOI: 10.3390/pharmaceutics15051378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/20/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
The precise delivery of cytotoxic radiation to cancer cells through the combination of a specific targeting vector with a radionuclide for targeted radionuclide therapy (TRT) has proven valuable for cancer care. TRT is increasingly being considered a relevant treatment method in fighting micro-metastases in the case of relapsed and disseminated disease. While antibodies were the first vectors applied in TRT, increasing research data has cited antibody fragments and peptides with superior properties and thus a growing interest in application. As further studies are completed and the need for novel radiopharmaceuticals nurtures, rigorous considerations in the design, laboratory analysis, pre-clinical evaluation, and clinical translation must be considered to ensure improved safety and effectiveness. Here, we assess the status and recent development of biological-based radiopharmaceuticals, with a focus on peptides and antibody fragments. Challenges in radiopharmaceutical design range from target selection, vector design, choice of radionuclides and associated radiochemistry. Dosimetry estimation, and the assessment of mechanisms to increase tumor uptake while reducing off-target exposure are discussed.
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Affiliation(s)
- Cyprine Neba Funeh
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
| | - Jessica Bridoux
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
| | - Thomas Ertveldt
- Laboratory for Molecular and Cellular Therapy, Vrije Universiteit Brussel, 1090 Brussels, Belgium
| | - Timo W M De Groof
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
| | - Dora Mugoli Chigoho
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
| | - Parinaz Asiabi
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
| | - Peter Covens
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
| | - Matthias D'Huyvetter
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
| | - Nick Devoogdt
- Laboratory for In Vivo Cellular and Molecular Imaging, Department of Medical Imaging, Vrije Universiteit Brussel, Laarbeeklaan 103/K.001, 1090 Brussels, Belgium
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13
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Casetti VT, MacLean J, Ayoub AD, Fredericks RJ, Adamski JA, Rusakov AA. Investigating the Heaviest Halogen: Lessons Learned from Modeling the Electronic Structure of Astatine's Small Molecules. J Phys Chem A 2023; 127:46-56. [PMID: 36538020 DOI: 10.1021/acs.jpca.2c06039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We present a systematic study of electron-correlation and relativistic effects in diatomic molecular species of the heaviest halogen astatine (At) within relativistic single- and multireference coupled-cluster approaches and relativistic density functional theory. We establish revised reference ab initio data for the ground states of At2, HAt, AtAu, and AtO+ using a highly accurate relativistic effective core potential model and in-house basis sets developed for accurate modeling of molecules with large spin-orbit effects. Spin-dependent relativistic effects on chemical bonding in the ground state are comparable to the binding energy or even exceed it in At2. Electron-correlation effects near the equilibrium internuclear separation are mostly dynamical and can be adequately captured using single-reference CCSD(T). However, bond elongation in At2 and, especially, AtO+ results in rapid manifestation of its multireference character. While useful for evaluating the spin-orbit effects on the ground-state bonding and properties, the two-component density functional theory lacks predictive power, especially in combination with popular empirically adjusted exchange-correlation functionals. This drawback supports the necessity to develop new functionals for reliable quantum-chemical models of heavy-element compounds with strong relativistic effects.
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Affiliation(s)
- Vincent T Casetti
- Department of Chemistry, Oakland University, Rochester, Michigan48309, United States
| | - James MacLean
- Department of Chemistry, Oakland University, Rochester, Michigan48309, United States
| | - Adam D Ayoub
- Department of Chemistry, Oakland University, Rochester, Michigan48309, United States
| | - Rain J Fredericks
- Material Science and Engineering Department, University of Michigan, Ann Arbor, Michigan48109, United States
| | - Jacob A Adamski
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan48109, United States
| | - Alexander A Rusakov
- Department of Chemistry, Oakland University, Rochester, Michigan48309, United States
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14
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Bloux H, Dahiya A, Hébert A, Fabis F, Schoenebeck F, Cailly T. Base-Mediated Radio-Iodination of Arenes by Using Organosilane and Organogermane as Radiolabelling Precursors. Chemistry 2023; 29:e202203366. [PMID: 36607172 DOI: 10.1002/chem.202203366] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/07/2023]
Abstract
The radio-iodination of arenes is investigated from organosilane and organogermane precursors using ipso-electrophilic halogenation (IEH). Discovery of a mild base mediated process allows radio-iodination in HFIP (1,1,1,3,3,3-hexafluoro-2-propanol) of either aryl silane or germane, with germanes being more reactive. Clinical potential of arylgermanes as radio-iodination precursors is demonstrated through the labelling of [125 I]IMTO (iodometomidate) and [125 I]MIBG (meta-iodobenzylguanidine) thus offering an alternative to radio-iododestannylation processes using non-toxic precursors.
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Affiliation(s)
- Hugo Bloux
- Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Normandie Univ, UNICAEN, 14000, Caen, France
| | - Amit Dahiya
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Alexandra Hébert
- Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Normandie Univ, UNICAEN, 14000, Caen, France
| | - Frédéric Fabis
- Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Normandie Univ, UNICAEN, 14000, Caen, France
| | - Franziska Schoenebeck
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Thomas Cailly
- Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Normandie Univ, UNICAEN, 14000, Caen, France.,IMOGERE, Normandie Univ, UNICAEN, 14000, Caen, France.,Department of Nuclear Medicine, CHU Côte de Nacre, 14000, Caen, France.,Institut Blood and Brain @Caen-Normandie (BB@C), Boulevard Henri Becquerel, 14074, Caen, France
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15
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Albertsson P, Bäck T, Bergmark K, Hallqvist A, Johansson M, Aneheim E, Lindegren S, Timperanza C, Smerud K, Palm S. Astatine-211 based radionuclide therapy: Current clinical trial landscape. Front Med (Lausanne) 2023; 9:1076210. [PMID: 36687417 PMCID: PMC9859440 DOI: 10.3389/fmed.2022.1076210] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/06/2022] [Indexed: 01/09/2023] Open
Abstract
Astatine-211 (211At) has physical properties that make it one of the top candidates for use as a radiation source for alpha particle-based radionuclide therapy, also referred to as targeted alpha therapy (TAT). Here, we summarize the main results of the completed clinical trials, further describe ongoing trials, and discuss future prospects.
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Affiliation(s)
- Per Albertsson
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden,*Correspondence: Per Albertsson ✉
| | - Tom Bäck
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Karin Bergmark
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Andreas Hallqvist
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Mia Johansson
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Emma Aneheim
- Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden,Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Sture Lindegren
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Chiara Timperanza
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Knut Smerud
- Smerud Medical Research International AS, Oslo, Norway
| | - Stig Palm
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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16
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Liu L, Maurice R, Galland N, Moisy P, Champion J, Montavon G. Pourbaix Diagram of Astatine Revisited: Experimental Investigations. Inorg Chem 2022; 61:13462-13470. [PMID: 35977097 DOI: 10.1021/acs.inorgchem.2c01918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Pourbaix diagram of an element displays its stable chemical forms with respect to the redox potential and pH of the solution, whose knowledge is fundamental for understanding and anticipating the chemistry of the element in a specified solution. Unlike most halogens, the Pourbaix diagram in the aqueous phase for astatine (At, Z = 85) is still under construction. In particular, the predominant domains of two astatine species assumed to exist under alkaline conditions, At- and AtO(OH)2-, need to be refined. Through high-performance ion-exchange chromatography, electromobility measurements, and competition experiments, the existence of At- and AtO(OH)2- has been confirmed and the associated standard potential has been determined for the first time (0.86 ± 0.05 V vs the standard hydrogen electrode). On the basis of these results, a revised version of astatine's Pourbaix diagram is proposed, covering the three oxidation states of astatine that exist in the thermodynamic stability range of water: At(-I), At(I), and At(III) (as At-, At+, AtO+, AtO(OH), and AtO(OH)2-).
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Affiliation(s)
- Lu Liu
- IMT Atlantique, Nantes Université, CNRS, SUBATECH, F-44000 Nantes, France
| | - Rémi Maurice
- IMT Atlantique, Nantes Université, CNRS, SUBATECH, F-44000 Nantes, France.,Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, 35000 Rennes, France
| | - Nicolas Galland
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
| | - Philippe Moisy
- CEA, DES, ISEC, DMRC, Univ Montpellier, F-30207 Marcoule, France
| | - Julie Champion
- IMT Atlantique, Nantes Université, CNRS, SUBATECH, F-44000 Nantes, France
| | - Gilles Montavon
- IMT Atlantique, Nantes Université, CNRS, SUBATECH, F-44000 Nantes, France
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17
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Radiation stability and radiolysis mechanism of hydroxyurea in HNO3 solution: Alpha, beta, and gamma irradiations. NUCLEAR ENGINEERING AND TECHNOLOGY 2022. [DOI: 10.1016/j.net.2022.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Burns JD, Tereshatov EE, Zhang B, Tabacaru GC, McIntosh LA, Schultz SJ, McCann LA, Harvey BM, Hannaman A, Lofton KN, Sorensen MQ, Vonder Haar AL, Hall MB, Yennello SJ. Complexation of Astatine(III) with Ketones: Roles of NO 3– Counterion and Exploration of Possible Binding Modes. Inorg Chem 2022; 61:12087-12096. [DOI: 10.1021/acs.inorgchem.2c00085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jonathan D. Burns
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
| | - Evgeny E. Tereshatov
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
| | - Bowen Zhang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Gabriel C. Tabacaru
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
| | - Lauren A. McIntosh
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
| | - Steven J. Schultz
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Laura A. McCann
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Bryan M. Harvey
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
- Department of Physics, Texas A&M University, College Station, Texas 77843, United States
| | - Andrew Hannaman
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Kylie N. Lofton
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Maxwell Q. Sorensen
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Amy L. Vonder Haar
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Sherry J. Yennello
- Cyclotron Institute, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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19
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Recent progress of astatine-211 in endoradiotherapy: Great advances from fundamental properties to targeted radiopharmaceuticals. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.03.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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20
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Separation, speciation, and mechanism of astatine and bismuth extraction from nitric acid into 1-octanol and methyl anthranilate. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120088] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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21
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Maingueneau C, Berdal M, Eychenne R, Gaschet J, Chérel M, Gestin JF, Guérard F. 211At and 125I-labeling of (hetero)aryliodonium ylides: astatine wins again. Chemistry 2021; 28:e202104169. [PMID: 34965315 DOI: 10.1002/chem.202104169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Indexed: 11/09/2022]
Abstract
Despite the growing interest in radioiodine and 211 At-labeled radiopharmaceuticals, the search for radiolabeling reactions has been somewhat neglected, resulting in a limited number of available radiosynthetic strategies. Herein we report a comparative study of nucleophilic 125 I and 211 At-labeling of aryliodonium ylides. Whereas radioiodination efficiency was low, 211 At-labeling performed efficiently on a broad scope of precursors. The most activated aryliodonium ylides led rapidly to quantitative reactions at room temperature in acetonitrile. For deactivated precursors, heating up to 90°C in glyme and addition of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) as radical scavenger appeared essential to avoid precursor degradation and to achieve high radiochemical yields and molar activity. The approach was applied successfully to the preparation of 4-[ 211 At]astatophenylalanine (4-APA), an amino acid derivative increasingly studied as radiotherapeutic drug for cancers. This validated aryliodonium ylides as a valuable tool for nucleophilic 211 At-labeling and will complement the short but now growing list of available astatination reactions.
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Affiliation(s)
- Clémence Maingueneau
- CRCINA: ERL Centre de Cancerologie et d'Immunologie Nantes-Angers, team 13, 8 Quai Moncousu,, 44007, Nantes, FRANCE
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