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Unverricht-Yeboah M, Von Ameln M, Kriehuber R. Induction of Chromosomal Aberrations after Exposure to the Auger Electron Emitter Iodine-125, the β--emitter Tritium and Cesium-137 γ rays. Radiat Res 2024; 201:479-486. [PMID: 38407403 DOI: 10.1667/rade-23-00158.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 01/22/2024] [Indexed: 02/27/2024]
Abstract
High-LET-type cell survival curves have been observed in cells that were allowed to incorporate 125I-UdR into their DNA. Incorporation of tritiated thymidine into the DNA of cells has also been shown to result in an increase in relative biological effectiveness in cell survival experiments, but the increase is smaller than observed after incorporation of 125I-UdR. These findings are explained in the literature by the overall complexity of the induced DNA damage resulting from energies of the ejected electron(s) during the decay of 3H and 125I. Chromosomal aberrations (CA) are defined as morphological or structural changes of one or more chromosomes, and can be induced by ionizing radiation. Whether the number of CA is associated with the linear energy transfer (LET) of the radiation and/or the actual complexity of the induced DNA double-strand breaks (DSB) remains elusive. In this study, we investigated whether DNA lesions induced at different cell cycle stages and by different radiation types [Auger-electrons (125I), β- particles (3H), or γ radiation (137Cs)] have an impact on the number of CA induced after induction of the same number of DSB as determined by the γ-H2AX foci assay. Cells were synchronized and pulse-labeled in S phase with low activities of 125I-UdR or tritiated thymidine. For decay accumulation, cells were cryopreserved either after pulse-labeling in S phase or after progression to G2/M or G1 phase. Experiments with γ irradiation (137Cs) were performed with synchronized and cryopreserved cells in S, G2/M or G1 phase. After thawing, a CA assay was performed. All experiments were performed after a similar number of DSB were induced. CA induction after 125I-UdR was incorporated was 2.9-fold and 1.7-fold greater compared to exposure to γ radiation and radiation from incorporated tritiated thymidine, respectively, when measured in G2/M cells. In addition, measurement of CA in G2/M cells after incorporation of 125I-UdR was 2.5-fold greater when compared to cells in G1 phase. In contrast, no differences were observed between the three radiation qualities with respect to exposure after cryopreservation in S or G1 phase. The data indicate that the 3D organization of replicated DNA in G2/M cells seems to be more sensitive to induction of more complex DNA lesions compared to the DNA architecture in S or G1 cells. Whether this is due to the DNA organization itself or differences in DNA repair capability remains unclear.
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Affiliation(s)
- M Unverricht-Yeboah
- Forschungszentrum Jülich, Department of Safety and Radiation Protection, Jülich, Germany
| | - M Von Ameln
- Forschungszentrum Jülich, Department of Safety and Radiation Protection, Jülich, Germany
| | - R Kriehuber
- Forschungszentrum Jülich, Department of Safety and Radiation Protection, Jülich, Germany
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Xia W, Singh N, Goel S, Shi S. Molecular Imaging of Innate Immunity and Immunotherapy. Adv Drug Deliv Rev 2023; 198:114865. [PMID: 37182699 DOI: 10.1016/j.addr.2023.114865] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/17/2023] [Accepted: 05/03/2023] [Indexed: 05/16/2023]
Abstract
The innate immune system plays a key role as the first line of defense in various human diseases including cancer, cardiovascular and inflammatory diseases. In contrast to tissue biopsies and blood biopsies, in vivo imaging of the innate immune system can provide whole body measurements of immune cell location and function and changes in response to disease progression and therapy. Rationally developed molecular imaging strategies can be used in evaluating the status and spatio-temporal distributions of the innate immune cells in near real-time, mapping the biodistribution of novel innate immunotherapies, monitoring their efficacy and potential toxicities, and eventually for stratifying patients that are likely to benefit from these immunotherapies. In this review, we will highlight the current state-of-the-art in noninvasive imaging techniques for preclinical imaging of the innate immune system particularly focusing on cell trafficking, biodistribution, as well as pharmacokinetics and dynamics of promising immunotherapies in cancer and other diseases; discuss the unmet needs and current challenges in integrating imaging modalities and immunology and suggest potential solutions to overcome these barriers.
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Affiliation(s)
- Wenxi Xia
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States
| | - Neetu Singh
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States
| | - Shreya Goel
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, United States; Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84112, United States
| | - Sixiang Shi
- Department of Molecular Pharmaceutics, University of Utah, Salt Lake City, UT 84112, United States; Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84112, United States.
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Braun F, Jaschinski M, Täger P, Marmann V, Brandenstein MV, Köditz B, Fischer T, Muñoz-Vázquez S, Zimmermanns B, Dietlein M, Sudbrock F, Krapf P, Fischer D, Heidenreich A, Drzezga A, Kirsch S, Pietsch M, Schomäcker K. Synthesis and evaluation of radioiodinated estrogens for diagnosis and therapy of male urogenital tumours. Org Biomol Chem 2023; 21:3090-3095. [PMID: 36947011 DOI: 10.1039/d3ob00114h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
The preparation of 24 estrogens, their estrogen receptor (ER) affinity and studies of radioiodinated estrogen binding to ER-positive male bladder tumor cells (HTB9) are described. The estrogens with the highest affinity were selected using fluorescence anisotropy assays. A 2,2,2-trifluoroethyl group at the 11β-position caused particularly promising affinity. (Radio)iodination was performed on the 17α-vinyl group. Binding studies on HTB9 cells revealed picomolar affinities of radioconjugates 19 and 31, indicating promising ability for targeting of urogenital tumors.
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Affiliation(s)
- Feodor Braun
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Marcel Jaschinski
- Organic Chemistry, Bergische Universität Wuppertal, 42119 Wuppertal, Germany
| | - Philipp Täger
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Verena Marmann
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Melanie von Brandenstein
- Clinic and Polyclinic for Urology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
| | - Barbara Köditz
- Clinic and Polyclinic for Urology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
| | - Thomas Fischer
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Sergio Muñoz-Vázquez
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Beate Zimmermanns
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Markus Dietlein
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Ferdinand Sudbrock
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Phillip Krapf
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Dietmar Fischer
- Institutes I & II of Pharmacology, Center of Pharmacology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany
| | - Axel Heidenreich
- Clinic and Polyclinic for Urology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany
| | - Alexander Drzezga
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
| | - Stefan Kirsch
- Organic Chemistry, Bergische Universität Wuppertal, 42119 Wuppertal, Germany
| | - Markus Pietsch
- Institutes I & II of Pharmacology, Center of Pharmacology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany
| | - Klaus Schomäcker
- Department of Nuclear Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937, Cologne, Germany.
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Skitnevskaya AD, Gokhberg K, Trofimov AB, Grigoricheva EK, Kuleff AI, Cederbaum LS. Two-Sided Impact of Water on the Relaxation of Inner-Valence Vacancies of Biologically Relevant Molecules. J Phys Chem Lett 2023; 14:1418-1426. [PMID: 36731025 DOI: 10.1021/acs.jpclett.2c03654] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
After ionization of an inner-valence electron of molecules, the resulting cation-radicals store substantial internal energy which, if sufficient, can trigger ejection of an additional electron in an Auger decay usually followed by molecule fragmentation. In the environment, intermolecular Coulombic decay (ICD) and electron-transfer mediated decay (ETMD) are also operative, resulting in one or two electrons being ejected from a neighbor, thus preventing the fragmentation of the initially ionized molecule. These relaxation processes are investigated theoretically for prototypical heterocycle-water complexes of imidazole, pyrrole, and pyridine. It is found that the hydrogen-bonding site of the water molecule critically influences the nature and energetics of the electronic states involved, opening or closing certain relaxation processes of the inner-valence ionized system. Our results indicate that the relaxation mechanisms of biologically relevant systems with inner-valence vacancies on their carbon atoms can strongly depend on the presence of the electron-density donating or accepting neighbor, either water or another biomolecule.
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Affiliation(s)
- Anna D Skitnevskaya
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
- Laboratory of Quantum Chemical Modeling of Molecular Systems, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
| | - Kirill Gokhberg
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - Alexander B Trofimov
- Laboratory of Quantum Chemical Modeling of Molecular Systems, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
- Favorsky's Institute of Chemistry, SB RAS, Favorsky Str. 1, 664033 Irkutsk, Russia
| | - Emma K Grigoricheva
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
- Laboratory of Quantum Chemical Modeling of Molecular Systems, Irkutsk State University, Karl Marx Str. 1, 664003 Irkutsk, Russia
| | - Alexander I Kuleff
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
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Evlyukhin E, Cifligu P, Pravica M, Bhowmik PK, Kim E, Popov D, Park C. Experimental demonstration of necessary conditions for X-ray induced synthesis of cesium superoxide. Phys Chem Chem Phys 2023; 25:1799-1807. [PMID: 36597992 DOI: 10.1039/d2cp04767e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Absorption of sufficiently energetic X-ray photons by a molecular system results in a cascade of ultrafast electronic relaxation processes which leads to a distortion and dissociation of its molecular structure. Here, we demonstrate that only decomposition of powdered cesium oxalate monohydrate induced by monochromatic X-ray irradiation under high pressure leads to the formation of cesium superoxide. Whereas, for an unhydrated form of cesium oxalate subjected to the same extreme conditions, only degradation of the electron density distribution is observed. Moreover, the corresponding model of X-ray induced electronic relaxation cascades with an emphasis on water molecules' critical role is proposed. Our experimental results suggest that the presence of water molecules in initially solid-state systems (i.e. additional electronic relaxation channels) together with applied high pressure (reduced interatomic/intermolecular distance) could potentially be a universal criteria for chemical and structural synthesis of novel compounds via X-ray induced photochemistry.
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Affiliation(s)
- Egor Evlyukhin
- Department of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV 89154, USA.
| | - Petrika Cifligu
- Department of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV 89154, USA.
| | - Michael Pravica
- Department of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV 89154, USA.
| | - Pradip K Bhowmik
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
| | - Eunja Kim
- Department of Physics, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Dmitry Popov
- High Pressure Collaborative Access Team (HPCAT), X-Ray Science Division, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Changyong Park
- High Pressure Collaborative Access Team (HPCAT), X-Ray Science Division, Argonne National Laboratory, Lemont, IL 60439, USA
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Karam J, Constanzo J, Pichard A, Gros L, Chopineau J, Morille M, Pouget JP. Rapid communication: insights into the role of extracellular vesicles during Auger radioimmunotherapy. Int J Radiat Biol 2023; 99:109-118. [PMID: 34270378 DOI: 10.1080/09553002.2021.1955999] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
PURPOSE Non-targeted effects, including bystander and systemic effects, play a crucial role during Auger targeted radionuclide therapy. Here, we investigated whether small extracellular vesicles (sEVs) produced by irradiated cells could contribute to the bystander cytotoxic effects in vitro and also to therapeutic efficacy in vivo, after their injection in tumor xenografts. MATERIALS AND METHODS B16F10 melanoma donor cells were exposed to radiolabeled antibodies (Auger radioimmunotherapy, RIT) for 48 h or to X-rays (donor cells). Then, donor cells were incubated with fresh medium for 2 h to prepare conditioned medium (CM) that was transferred onto recipient cells for bystander effect assessment, or used for sEVs enrichment. Resulting sEVs were incubated in vitro with recipient cells for determining bystander cytotoxicity, or injected in B16F10 melanoma tumors harbored by athymic and C57BL/6 mice. RESULTS In vitro analysis of bystander cytotoxic effects showed that CM killed about 30-40% of melanoma cells. SEVs isolated from CM contributed to this effect. Moreover, the double-stranded DNA (dsDNA) content was increased in sEVs isolated from CM of exposed cells compared to control (not exposed), but the difference was significant only for the X-ray condition. These results were supported by immunodetection of cytosolic dsDNA in donor cells, a phenomenon that should precede dsDNA enrichment in sEVs. However, sEVs cytotoxicity could not be detected in vivo. Indeed, in athymic and in immunocompetent mice that received four intratumoral injections of sEVs (1/day), tumor growth was not delayed compared with untreated controls. Tumor growth was slightly (not significantly) delayed in immunocompetent mice treated with sEVs from X-ray-exposed cells, and significantly with sEVs purified from CM collected after 48 h of incubation. These results highlight the need to determine the optimal conditions, including radiation absorbed dose and sEVs collection time, to obtain the strongest cytotoxic effects. CONCLUSIONS This study demonstrates that sEVs could play a role during Auger RIT through bystander effects in vitro. No systemic effects were observed in vivo, under our experimental conditions. However, X-rays experiments showed that sEVs collection time might be influencing the nature of sEVs, a parameter that should also be investigated during Auger RIT.
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Affiliation(s)
- Jihad Karam
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194, Institut Régional du Cancer de Montpellier (ICM), Université de Montpellier, Montpellier, France
| | - Julie Constanzo
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194, Institut Régional du Cancer de Montpellier (ICM), Université de Montpellier, Montpellier, France
| | - Alexandre Pichard
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194, Institut Régional du Cancer de Montpellier (ICM), Université de Montpellier, Montpellier, France
| | - Laurent Gros
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194, Institut Régional du Cancer de Montpellier (ICM), Université de Montpellier, Montpellier, France
| | - Joël Chopineau
- ICGM, ENSCM, CNRS, Université de Montpellier, Montpellier, France
| | - Marie Morille
- ICGM, ENSCM, CNRS, Université de Montpellier, Montpellier, France
| | - Jean-Pierre Pouget
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194, Institut Régional du Cancer de Montpellier (ICM), Université de Montpellier, Montpellier, France
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Rosenkranz AA, Slastnikova TA, Durymanov MO, Georgiev GP, Sobolev AS. Exploiting active nuclear import for efficient delivery of Auger electron emitters into the cell nucleus. Int J Radiat Biol 2023; 99:28-38. [PMID: 32856963 DOI: 10.1080/09553002.2020.1815889] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND The most attractive features of Auger electrons (AEs) in cancer therapy are their extremely short range and sufficiently high linear energy transfer (LET) for a majority of them. The cytotoxic effects of AE emitters can be realized only in close vicinity to sensitive cellular targets and they are negligible if the emitters are located outside the cell. The nucleus is considered the compartment most sensitive to high LET particles. Therefore, the use of AE emitters could be most useful in specific recognition of a cancer cell and delivery of AE emitters into its nucleus. PURPOSE This review describes the studies aimed at developing effective anticancer agents for the delivery of AE emitters to the nuclei of target cancer cells. The use of peptide-based conjugates, nanoparticles, recombinant proteins, and other constructs for AE emitter targeted intranuclear delivery as well as their advantages and limitations are discussed. CONCLUSION Transport from the cytoplasm to the nucleus along with binding to the cancer cell is one of the key stages in the delivery of AE emitters; therefore, several constructs for exploitation of this transport have been developed. The transport is carried out through a nuclear pore complex (NPC) with the use of specific amino acid nuclear localization sequences (NLS) and carrier proteins named importins, which are located in the cytosol. Therefore, the effectiveness of NLS-containing delivery constructs designed to provide energy-dependent transport of AE emitter into the nuclei of cancer cells also depends on their efficient entry into the cytosol of the target cell.
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Affiliation(s)
- Andrey A Rosenkranz
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia.,Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | | | | | | | - Alexander S Sobolev
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia.,Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
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8
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Fernando NK, Bostrom HLB, Murray CA, Owen RL, Thompson AL, Dickerson JL, Garman EF, Cairns AB, Regoutz A. Variability in X-ray induced effects in [Rh(COD)Cl] 2 with changing experimental parameters. Phys Chem Chem Phys 2022; 24:28444-28456. [PMID: 36399064 PMCID: PMC7614095 DOI: 10.1039/d2cp03928a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
X-ray characterisation methods have undoubtedly enabled cutting-edge advances in all aspects of materials research. Despite the enormous breadth of information that can be extracted from these techniques, the challenge of radiation-induced sample change and damage remains prevalent. This is largely due to the emergence of modern, high-intensity X-ray source technologies and the growing potential to carry out more complex, longer duration in situ or in operando studies. The tunability of synchrotron beamlines enables the routine application of photon energy-dependent experiments. This work explores the structural stability of [Rh(COD)Cl]2, a widely used catalyst and precursor in the chemical industry, across a range of beamline parameters that target X-ray energies of 8 keV, 15 keV, 18 keV and 25 keV, on a powder X-ray diffraction synchrotron beamline at room temperature. Structural changes are discussed with respect to absorbed X-ray dose at each experimental setting associated with the respective photon energy. In addition, the X-ray radiation hardness of the catalyst is discussed, by utilising the diffraction data collected at the different energies to determine a dose limit, which is often considered in protein crystallography and typically overlooked in small molecule crystallography. This work not only gives fundamental insight into how damage manifests in this organometallic catalyst, but will encourage careful consideration of experimental X-ray parameters before conducting diffraction on similar radiation-sensitive organometallic materials.
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Affiliation(s)
- Nathalie K. Fernando
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Hanna L. B. Bostrom
- Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Claire A. Murray
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Robin L. Owen
- Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
| | - Amber L. Thompson
- Chemical Crystallography, Chemistry Research Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK
| | - Joshua L. Dickerson
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK
| | - Elspeth F. Garman
- Department of Biochemistry, Dorothy Crowfoot Hodgkin Building, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Andrew B. Cairns
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ, UK
| | - Anna Regoutz
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
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Salim R, Taherparvar P. Dosimetry assessment of theranostic Auger-emitting radionuclides in a micron-sized multicellular cluster model: A Monte Carlo study using Geant4-DNA simulations. Appl Radiat Isot 2022; 188:110380. [PMID: 35868198 DOI: 10.1016/j.apradiso.2022.110380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/28/2022] [Accepted: 07/07/2022] [Indexed: 11/02/2022]
Abstract
The present work is aimed at improving the multicellular dosimetry of several Auger radionuclides of interest for targeted cancer therapy, including 99mTc, 111In, 123I, 125I, and 201Tl. For this purpose, using the Geant4-DNA Monte Carlo code, a cluster of 13 similar spherical cells with a hexagonal packed arrangement was modeled, and the mean absorbed doses per unit cumulated activity (S-values) were calculated by considering two target←source configurations, cell←cell and nucleus←nucleus. The obtained ratios of cross-dose to self-dose S-value in terms of the distance between the source and target regions were evaluated and also compared to those estimated by the Medical Internal Radiation Dose (MIRD) method. Besides, the contribution of the Coster-Kronig, Auger and internal conversion electrons to the S-values was provided for each radionuclide. According to the results, it can be concluded that in contrast to self-absorption, the cross-absorption due to the Auger-emitters has not a significant role in the total energy deposition within a cell in the cluster.
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Affiliation(s)
- R Salim
- Department of Physics, Faculty of Science, University of Guilan, Rasht, Iran
| | - P Taherparvar
- Department of Physics, Faculty of Science, University of Guilan, Rasht, Iran.
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10
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Salim R, Taherparvar P. A Monte Carlo study on the effects of a static uniform magnetic field on micro-scale dosimetry of Auger-emitters using Geant4-DNA. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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11
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Novel Bifunctional [16]aneS 4-Derived Chelators for Soft Radiometals. Molecules 2021; 26:molecules26154603. [PMID: 34361752 PMCID: PMC8348053 DOI: 10.3390/molecules26154603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/24/2021] [Accepted: 07/26/2021] [Indexed: 11/16/2022] Open
Abstract
The field of targeted radionuclide therapy is rapidly growing, highlighting the need for wider radionuclide availability. Soft Lewis acid ions, such as radioisotopes of platinum, rhodium and palladium, are particularly underdeveloped. This is due in part to a lack of compatible bifunctional chelators. These allow for the practical bioconjugation to targeting vectors, in turn enabling radiolabeling. The [16]andS4 macrocycle has been reported to chelate a number of relevant soft metal ions. In this work, we present a procedure for synthesizing [16]andS4 in 45% yield (five steps, 12% overall yield), together with a selection of strategies for preparing bifunctional derivatives. An ester-linked N-hydroxysuccimide ester (NHS, seven steps, 4% overall yield), an ether-linked isothiocyanate (NCS, eight steps, 5% overall yield) and an azide derivative were prepared. In addition, a new route to a carbon-carbon linked carboxylic acid functionalized derivative is presented. Finally, a general method for conjugating the NHS and NCS derivatives to a polar peptide (octreotide) is presented, by dissolution in water:acetonitrile (1:1), buffered to pH 9.4 using borate. The reported compounds will be readily applicable in radiopharmaceutical chemistry, by facilitating the labeling of a range of molecules, including peptides, with relevant soft radiometal ions.
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Cederbaum LS, Kuleff AI. Impact of cavity on interatomic Coulombic decay. Nat Commun 2021; 12:4083. [PMID: 34215732 PMCID: PMC8253799 DOI: 10.1038/s41467-021-24221-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 06/04/2021] [Indexed: 11/25/2022] Open
Abstract
The interatomic Coulombic decay (ICD) is an efficient electronic decay process of systems embedded in environment. In ICD, the excess energy of an excited atom A is efficiently utilized to ionize a neighboring atom B. In quantum light, an ensemble of atoms A form polaritonic states which can undergo ICD with B. Here we investigate the impact of quantum light on ICD and show that this process is strongly altered compared to classical ICD. The ICD rate depends sensitively on the atomic distribution and orientation of the ensemble. It is stressed that in contrast to superposition states formed by a laser, forming polaritons by a cavity enables to control the emergence and suppression, as well as the efficiency of ICD.
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Affiliation(s)
- Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg, Germany.
| | - Alexander I Kuleff
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg, Germany.
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13
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Moradi MS, Bidabadi BS. Assessment of Single-and Double-Strand Breaks in DNA Induced by Auger Electrons of Radioisotopes Used in Diagnostic and Therapeutic Applications. J Med Phys 2021; 45:240-248. [PMID: 33953500 PMCID: PMC8074716 DOI: 10.4103/jmp.jmp_79_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 12/02/2020] [Accepted: 12/02/2020] [Indexed: 11/30/2022] Open
Abstract
Introduction: Most of the radionuclides that are used for diagnostic purposes emit Auger electrons and can thus cause damage to the DNA molecule on a nanometer scale. Therefore, the nanodosimetric calculation of these radioisotopes is necessary to achieve better understanding on their effects. Aim: The aim of this study was to calculate the mean number of DNA strand breaks (single-strand breaks and double-strand breaks) caused by direct and indirect effects for six widely used Auger electron-emitting diagnostic radioisotopes, including 123I, 125I, 99mTc, 67Ga, 201Tl, 111In and two therapeutic radioisotopes of 131I(beta + Auger + CK emitter) and 211At(alpha + Auger + CK emitter). Materials and Methods: Geant4-DNA simulation tool was used to evaluate the effects of Auger electrons, beta and alpha particles of these radioisotopes on DNA molecules. Two different DNA molecule geometric models were simulated and the results of these two models were compared with each other as well as with the results of previous studies. Results and Conclusion: The results showed that the geometric shape of the sugar-phosphate groups may have a significant effect on the number of single-strand breaks (SSBs) and double-strand breaks (DSBs) of the DNA molecule. Among the most widely used diagnostic radioisotopes, 201Tl and 125I, had the greatest impact on the number of SSBs and DSBs, respectively, while therapeutic radioisotope of 131I almost had no effect, therapeutic radioisotope of 211At had the moderate effect on the number of breaks in the DNA chain.
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Affiliation(s)
- Mahdi Seifi Moradi
- Department of Nuclear Engineering, Faculty of Physics, University of Isfahan, Isfahan, Iran
| | - Babak Shirani Bidabadi
- Department of Nuclear Engineering, Faculty of Physics, University of Isfahan, Isfahan, Iran
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14
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Omar KA, Hasnaoui K, de la Lande A. First-Principles Simulations of Biological Molecules Subjected to Ionizing Radiation. Annu Rev Phys Chem 2021; 72:445-465. [PMID: 33878897 DOI: 10.1146/annurev-physchem-101419-013639] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ionizing rays cause damage to genomes, proteins, and signaling pathways that normally regulate cell activity, with harmful consequences such as accelerated aging, tumors, and cancers but also with beneficial effects in the context of radiotherapies. While the great pace of research in the twentieth century led to the identification of the molecular mechanisms for chemical lesions on the building blocks of biomacromolecules, the last two decades have brought renewed questions, for example, regarding the formation of clustered damage or the rich chemistry involving the secondary electrons produced by radiolysis. Radiation chemistry is now meeting attosecond science, providing extraordinary opportunities to unravel the very first stages of biological matter radiolysis. This review provides an overview of the recent progress made in this direction, focusing mainly on the atto- to femto- to picosecond timescales. We review promising applications of time-dependent density functional theory in this context.
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Affiliation(s)
- Karwan Ali Omar
- Institut de Chimie Physique, CNRS UMR 8000, Université Paris-Saclay, 91405 Orsay, France; .,Department of Chemistry, College of Education, University of Sulaimani, 41005 Kurdistan, Iraq
| | - Karim Hasnaoui
- High Performance Computing User Support Team, Institut du Développement et des Ressources en Informatique Scientifique (IDRIS), 91403 Orsay, France.,Maison de la Simulation, CNRS, Commissariat à l'Energie Atomique et aux Énergies Alternatives (CEA), Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Aurélien de la Lande
- Institut de Chimie Physique, CNRS UMR 8000, Université Paris-Saclay, 91405 Orsay, France;
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15
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Kyriakou I, Tremi I, Georgakilas AG, Emfietzoglou D. Microdosimetric investigation of the radiation quality of low-medium energy electrons using Geant4-DNA. Appl Radiat Isot 2021; 172:109654. [PMID: 33676082 DOI: 10.1016/j.apradiso.2021.109654] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/17/2021] [Accepted: 02/20/2021] [Indexed: 02/06/2023]
Abstract
The increasing clinical use of low-energy photon and electron sources (below few tens of keV) has raised concerns on the adequacy of the existing approximation of an energy-independent radiobiological effectiveness. In this work, the variation of the quality factor (Q) and relative biological effectiveness (RBE) of electrons over the low-medium energy range (0.1 keV-1 MeV) is examined using several microdosimetry-based Monte Carlo methodologies with input data obtained from Geant4-DNA track-structure simulations. The sensitivity of the results to the different methodologies, Geant4-DNA physics models, and target sizes is examined. Calculations of Q and RBE are based on the ICRU Report 40 recommendations, the Kellerer-Hahn approximation, the site version of the theory of dual radiation action (TDRA), the microdosimetric kinetic model (MKM) of cell survival, and the calculated yield of DNA double strand breaks (DSB). The stochastic energy deposition spectra needed as input in the above approaches have been calculated for nanometer spherical volumes using the different electron physics models of Geant4-DNA. Results are normalized at 100 keV electrons which is here considered the reference radiation. It is shown that in the energy range ~50 keV-1 MeV, the calculated Q and RBE are approximately unity (to within 1-2%) irrespective of the methodology, Geant4-DNA physics model, and target size. At lower energies, Q and RBE become energy-dependent reaching a maximum value of ~1.5-2.5 between ~200 and 700 eV. The detailed variation of Q and RBE at low energies depends mostly upon the adopted methodology and target size, and less so upon the Geant4-DNA physics model. Overall, the DSB yield predicts the highest RBE values (with RBEmax≈2.5) whereas the MKM the lowest RBE values (with RBEmax≈1.5). The ICRU Report 40, Kellerer-Hahn, and TDRA methods are in excellent agreement (to within 1-2%) over the whole energy range predicting a Qmax≈2. In conclusion, the approximation Q=RBE=1 was found to be valid only above ~50 keV whereas at lower energies both Q and RBE become strongly energy-dependent. It is envisioned that the present work will contribute towards establishing robust methodologies to determine theoretically the energy-dependence of radiation quality of individual electrons which may then be used in subsequent calculations involving practical electron and photon radiation sources.
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Affiliation(s)
- Ioanna Kyriakou
- Medical Physics Laboratory, University of Ioannina Medical School, 45110, Ioannina, Greece.
| | - Ioanna Tremi
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens (NTUA), Zografou, Athens, Greece
| | - Alexandros G Georgakilas
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens (NTUA), Zografou, Athens, Greece
| | - Dimitris Emfietzoglou
- Medical Physics Laboratory, University of Ioannina Medical School, 45110, Ioannina, Greece
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16
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Jahnke T, Hergenhahn U, Winter B, Dörner R, Frühling U, Demekhin PV, Gokhberg K, Cederbaum LS, Ehresmann A, Knie A, Dreuw A. Interatomic and Intermolecular Coulombic Decay. Chem Rev 2020; 120:11295-11369. [PMID: 33035051 PMCID: PMC7596762 DOI: 10.1021/acs.chemrev.0c00106] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Interatomic or intermolecular Coulombic decay (ICD) is a nonlocal electronic decay mechanism occurring in weakly bound matter. In an ICD process, energy released by electronic relaxation of an excited atom or molecule leads to ionization of a neighboring one via Coulombic electron interactions. ICD has been predicted theoretically in the mid nineties of the last century, and its existence has been confirmed experimentally approximately ten years later. Since then, a number of fundamental and applied aspects have been studied in this quickly growing field of research. This review provides an introduction to ICD and draws the connection to related energy transfer and ionization processes. The theoretical approaches for the description of ICD as well as the experimental techniques developed and employed for its investigation are described. The existing body of literature on experimental and theoretical studies of ICD processes in different atomic and molecular systems is reviewed.
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Affiliation(s)
- Till Jahnke
- Institut für Kernphysik, Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - Uwe Hergenhahn
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.,Max Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17491 Greifswald, Germany.,Leibniz Institute of Surface Engineering (IOM), 04318 Leipzig, Germany
| | - Bernd Winter
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Reinhard Dörner
- Institut für Kernphysik, Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - Ulrike Frühling
- Institut für Experimentalphysik and Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Philipp V Demekhin
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Kirill Gokhberg
- Physical-Chemistry Institute, Ruprecht-Karls University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Lorenz S Cederbaum
- Physical-Chemistry Institute, Ruprecht-Karls University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Arno Ehresmann
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - André Knie
- Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
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17
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Howell RW. Advancements in the use of Auger electrons in science and medicine during the period 2015-2019. Int J Radiat Biol 2020; 99:2-27. [PMID: 33021416 PMCID: PMC8062591 DOI: 10.1080/09553002.2020.1831706] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/01/2020] [Accepted: 09/28/2020] [Indexed: 02/06/2023]
Abstract
Auger electrons can be highly radiotoxic when they are used to irradiate specific molecular sites. This has spurred basic science investigations of their radiobiological effects and clinical investigations of their potential for therapy. Focused symposia on the biophysical aspects of Auger processes have been held quadrennially. This 9th International Symposium on Physical, Molecular, Cellular, and Medical Aspects of Auger Processes at Oxford University brought together scientists from many different fields to review past findings, discuss the latest studies, and plot the future work to be done. This review article examines the research in this field that was published during the years 2015-2019 which corresponds to the period since the last meeting in Japan. In addition, this article points to future work yet to be done. There have been a plethora of advancements in our understanding of Auger processes. These advancements range from basic atomic and molecular physics to new ways to implement Auger electron emitters in radiopharmaceutical therapy. The highly localized doses of radiation that are deposited within a 10 nm of the decay site make them precision tools for discovery across the physical, chemical, biological, and medical sciences.
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Affiliation(s)
- Roger W Howell
- Division of Radiation Research, Department of Radiology, New Jersey Medical School, Rutgers University, Newark, NJ, USA
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18
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Zhong S, Vinbladh J, Busto D, Squibb RJ, Isinger M, Neoričić L, Laurell H, Weissenbilder R, Arnold CL, Feifel R, Dahlström JM, Wendin G, Gisselbrecht M, Lindroth E, L'Huillier A. Attosecond electron-spin dynamics in Xe 4d photoionization. Nat Commun 2020; 11:5042. [PMID: 33028822 PMCID: PMC7541461 DOI: 10.1038/s41467-020-18847-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 09/09/2020] [Indexed: 11/16/2022] Open
Abstract
The photoionization of xenon atoms in the 70–100 eV range reveals several fascinating physical phenomena such as a giant resonance induced by the dynamic rearrangement of the electron cloud after photon absorption, an anomalous branching ratio between intermediate Xe+ states separated by the spin-orbit interaction and multiple Auger decay processes. These phenomena have been studied in the past, using in particular synchrotron radiation, but without access to real-time dynamics. Here, we study the dynamics of Xe 4d photoionization on its natural time scale combining attosecond interferometry and coincidence spectroscopy. A time-frequency analysis of the involved transitions allows us to identify two interfering ionization mechanisms: the broad giant dipole resonance with a fast decay time less than 50 as, and a narrow resonance at threshold induced by spin-flip transitions, with much longer decay times of several hundred as. Our results provide insight into the complex electron-spin dynamics of photo-induced phenomena. Here the authors report experiment and theory study of the photoionization of xenon inner shell 4d electron using attosecond pulses. They have identified two ionization paths - one corresponding to broad giant dipole resonance with short decay time and the other involving spin-flip transitions.
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Affiliation(s)
- Shiyang Zhong
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden.
| | - Jimmy Vinbladh
- Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, SE-106 91, Sweden
| | - David Busto
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
| | - Richard J Squibb
- Department of Physics, University of Gothenburg, Origovägen 6B, Gothenburg, SE-412 96, Sweden
| | - Marcus Isinger
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
| | - Lana Neoričić
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
| | - Hugo Laurell
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
| | - Robin Weissenbilder
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
| | - Cord L Arnold
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
| | - Raimund Feifel
- Department of Physics, University of Gothenburg, Origovägen 6B, Gothenburg, SE-412 96, Sweden
| | | | - Göran Wendin
- Department of Microtechnology and Nanoscience-MC2, Chalmers University of Technology, Gothenburg, SE-412 96, Sweden
| | | | - Eva Lindroth
- Department of Physics, Stockholm University, AlbaNova University Center, Stockholm, SE-106 91, Sweden
| | - Anne L'Huillier
- Department of Physics, Lund University, P.O. Box 118, Lund, SE-221 00, Sweden
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19
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Mahdi SM, Babak SB. Dosimetry study on Auger electron-emitting nuclear medicine radioisotopes in micrometer and nanometer scales using Geant4-DNA simulation. Int J Radiat Biol 2020; 96:1452-1465. [DOI: 10.1080/09553002.2020.1820608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Grell G, Bokarev SI. Multi-reference protocol for (auto)ionization spectra: Application to molecules. J Chem Phys 2020; 152:074108. [DOI: 10.1063/1.5142251] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Gilbert Grell
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock, Germany
| | - Sergey I. Bokarev
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock, Germany
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21
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Talip Z, Favaretto C, Geistlich S, van der Meulen NP. A Step-by-Step Guide for the Novel Radiometal Production for Medical Applications: Case Studies with 68Ga, 44Sc, 177Lu and 161Tb. Molecules 2020; 25:E966. [PMID: 32093425 PMCID: PMC7070971 DOI: 10.3390/molecules25040966] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/16/2020] [Accepted: 02/17/2020] [Indexed: 02/06/2023] Open
Abstract
The production of novel radionuclides is the first step towards the development of new effective radiopharmaceuticals, and the quality thereof directly affects the preclinical and clinical phases. In this review, novel radiometal production for medical applications is briefly elucidated. The production status of the imaging nuclide 44Sc and the therapeutic β--emitter nuclide 161Tb are compared to their more established counterparts, 68Ga and 177Lu according to their targetry, irradiation process, radiochemistry, and quality control aspects. The detailed discussion of these significant issues will help towards the future introduction of these promising radionuclides into drug manufacture for clinical application under Good Manufacturing Practice (GMP).
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Affiliation(s)
- Zeynep Talip
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
| | - Chiara Favaretto
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Susanne Geistlich
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Nicholas P. van der Meulen
- Center for Radiopharmaceutical Sciences ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
- Laboratory of Radiochemistry, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland
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22
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Delivery systems exploiting natural cell transport processes of macromolecules for intracellular targeting of Auger electron emitters. Nucl Med Biol 2019; 80-81:45-56. [PMID: 31810828 DOI: 10.1016/j.nucmedbio.2019.11.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/24/2019] [Accepted: 11/25/2019] [Indexed: 12/17/2022]
Abstract
The presence of Auger electrons (AE) among the decay products of a number of radionuclides makes these radionuclides an attractive means for treating cancer because these short-range electrons can cause significant damage in the immediate vicinity of the decomposition site. Moreover, the extreme locality of the effect provides a potential for selective eradication of cancer cells with minimal damage to adjacent normal cells provided that the delivery of the AE emitter to the most vulnerable parts of the cell can be achieved. Few cellular compartments have been regarded as the desired target site for AE emitters, with the cell nucleus generally recognized as the preferred site for AE decay due to the extreme sensitivity of nuclear DNA to direct damage by radiation of high linear energy transfer. Thus, the advantages of AE emitters for cancer therapy are most likely to be realized by their selective delivery into the nucleus of the malignant cells. To achieve this goal, delivery systems must combine a challenging complex of properties that not only provide cancer cell preferential recognition but also cell entry followed by transport into the cell nucleus. A promising strategy for achieving this is the recruitment of natural cell transport processes of macromolecules, involved in each of the aforementioned steps. To date, a number of constructs exploiting intracellular transport systems have been proposed for AE emitter delivery to the nucleus of a targeted cell. An example of such a multifunctional vehicle that provides smart step-by-step delivery is the so-called modular nanotransporter, which accomplishes selective recognition, binding, internalization, and endosomal escape followed by nuclear import of the delivered radionuclide. The current review will focus on delivery systems utilizing various intracellular transport pathways and their combinations in order to provide efficient targeting of AE to the cancer cell nucleus.
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23
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Schwestka J, Niggas A, Creutzburg S, Kozubek R, Heller R, Schleberger M, Wilhelm RA, Aumayr F. Charge-Exchange-Driven Low-Energy Electron Splash Induced by Heavy Ion Impact on Condensed Matter. J Phys Chem Lett 2019; 10:4805-4811. [PMID: 31382749 DOI: 10.1021/acs.jpclett.9b01774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Low-energy electrons (LEEs) are of great relevance for ion-induced radiation damage in cells and genes. We show that charge exchange of ions leads to LEE emission upon impact on condensed matter. By using a graphene monolayer as a simple model system for condensed organic matter and utilizing slow highly charged ions (HCIs) as projectiles, we highlight the importance of charge exchange alone for LEE emission. We find a large number of ejected electrons resulting from individual ion impacts (up to 80 electrons/ion for Xe40+). More than 90% of emitted electrons have energies well below 15 eV. This "splash" of low-energy electrons is interpreted as the consequence of ion deexcitation via an interatomic Coulombic decay (ICD) process.
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Affiliation(s)
| | - Anna Niggas
- Institute of Applied Physics, TU Wien, 1040 Vienna, Austria
| | - Sascha Creutzburg
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - Roland Kozubek
- Faculty of Physics and CENIDE, University Duisburg-Essen, 47057 Duisburg, Germany
| | - René Heller
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - Marika Schleberger
- Faculty of Physics and CENIDE, University Duisburg-Essen, 47057 Duisburg, Germany
| | - Richard A Wilhelm
- Institute of Applied Physics, TU Wien, 1040 Vienna, Austria
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
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24
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Salim R, Taherparvar P. Monte Carlo single-cell dosimetry using Geant4-DNA: the effects of cell nucleus displacement and rotation on cellular S values. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2019; 58:353-371. [PMID: 30927051 DOI: 10.1007/s00411-019-00788-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
Investigation of biological effects of low-dose ionizing radiation at the (sub-) cellular level, which is referred to as microdosimetry, remains a major challenge of today's radiobiology research. Monte Carlo simulation of radiation tracks can provide a detailed description of the physical processes involved in dimensions as small as the critical substructures of the cell. Hereby, in the present study, microdosimetric calculations of cellular S values for mono-energetic electrons and six Auger-emitting radionuclides were performed in single-cell models of liquid water using Geant4-DNA. The effects of displacement and rotation of the nucleus within the cell on the cellular S values were studied in spherical and ellipsoidal geometries. It was found that for the examined electron energies and radionuclides, in the case of nucleus cross-absorption where the radioactivity is either localized in the cytoplasm of the cell or distributed on the cell surface, rotation of the nucleus within the cell affects cellular S values less than displacement of the nucleus. Especially, the considerable differences observed in S(nucleus ← cell surface) values between an eccentric and a concentric cell-nucleus configuration in spherical and ellipsoidal geometries (up to 63% and up to 44%, respectively) suggests that the approximation of concentricity should be used with caution, at least for localized irradiation of the cell membrane by an Auger-emitter in targeted radionuclide cancer therapy. The obtained results, which are based on a more realistic modeling of the cell than was done before, provide more accurate information about nuclear dose. This can be useful for theranostic applications.
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Affiliation(s)
- Ramak Salim
- Department of Physics, Faculty of Science, University of Guilan, Namjoo Avenue, P.O. Box 41335-19141, Rasht, 4193833697, Iran
| | - Payvand Taherparvar
- Department of Physics, Faculty of Science, University of Guilan, Namjoo Avenue, P.O. Box 41335-19141, Rasht, 4193833697, Iran.
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25
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Rosenkranz AA, Slastnikova TA, Karmakova TA, Vorontsova MS, Morozova NB, Petriev VM, Abrosimov AS, Khramtsov YV, Lupanova TN, Ulasov AV, Yakubovskaya RI, Georgiev GP, Sobolev AS. Antitumor Activity of Auger Electron Emitter 111In Delivered by Modular Nanotransporter for Treatment of Bladder Cancer With EGFR Overexpression. Front Pharmacol 2018; 9:1331. [PMID: 30510514 PMCID: PMC6252321 DOI: 10.3389/fphar.2018.01331] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 10/29/2018] [Indexed: 12/18/2022] Open
Abstract
Gamma-ray emitting 111In, which is extensively used for imaging, is also a source of short-range Auger electrons (AE). While exhibiting negligible effect outside cells, these AE become highly toxic near DNA within the cell nucleus. Therefore, these radionuclides can be used as a therapeutic anticancer agent if delivered precisely into the nuclei of tumor target cells. Modular nanotransporters (MNTs) designed to provide receptor-targeted delivery of short-range therapeutic cargoes into the nuclei of target cells are perspective candidates for specific intracellular delivery of AE emitters. The objective of this study was to evaluate the in vitro and in vivo efficacy of 111In attached MNTs to kill human bladder cancer cells overexpressing epidermal growth factor receptor (EGFR). The cytotoxicity of 111In delivered by the EGFR-targeted MNT (111In-MNT) was greatly enhanced on EJ-, HT-1376-, and 5637-expressing EGFR bladder cancer cell lines compared with 111In non-targeted control. In vivo microSPECT/CT imaging and antitumor efficacy studies revealed prolonged intratumoral retention of 111In-MNT with t½ = 4.1 ± 0.5 days as well as significant dose-dependent tumor growth delay (up to 90% growth inhibition) after local infusion of 111In-MNT in EJ xenograft-bearing mice.
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Affiliation(s)
- Andrey A Rosenkranz
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia.,Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | | | - Tatiana A Karmakova
- National Medical Research Radiology Center of the Ministry of Healthcare of the Russian Federation, Moscow, Russia
| | - Maria S Vorontsova
- National Medical Research Radiology Center of the Ministry of Healthcare of the Russian Federation, Moscow, Russia
| | - Natalia B Morozova
- National Medical Research Radiology Center of the Ministry of Healthcare of the Russian Federation, Moscow, Russia
| | - Vasiliy M Petriev
- National Medical Research Radiology Center of the Ministry of Healthcare of the Russian Federation, Moscow, Russia.,National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia
| | | | - Yuri V Khramtsov
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia
| | | | - Alexey V Ulasov
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia
| | - Raisa I Yakubovskaya
- National Medical Research Radiology Center of the Ministry of Healthcare of the Russian Federation, Moscow, Russia
| | | | - Alexander S Sobolev
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia.,Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
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26
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Gonzales J, Kossatz S, Roberts S, Pirovano G, Brand C, Pérez-Medina C, Donabedian P, de la Cruz MJ, Mulder WJM, Reiner T. Nanoemulsion-Based Delivery of Fluorescent PARP Inhibitors in Mouse Models of Small Cell Lung Cancer. Bioconjug Chem 2018; 29:3776-3782. [PMID: 30354077 DOI: 10.1021/acs.bioconjchem.8b00640] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The preclinical potential of many diagnostic and therapeutic small molecules is limited by their rapid washout kinetics and consequently modest pharmacological performances. In several cases, these could be improved by loading the small molecules into nanoparticulates, improving blood half-life, in vivo uptake and overall pharmacodynamics. In this study, we report a nanoemulsion (NE) encapsulated form of PARPi-FL. As a proof of concept, we used PARPi-FL, which is a fluorescently labeled sensor for olaparib, a FDA-approved small molecule inhibitor of the nuclear enzyme poly(ADP-ribose)polymerase 1 (PARP1). Encapsulated PARPi-FL showed increased blood half-life, and delineated subcutaneous xenografts of small cell lung cancer (SCLC), a fast-progressing disease where efficient treatment options remain an unmet clinical need. Our study demonstrates an effective method for expanding the circulation time of a fluorescent PARP inhibitor, highlighting the pharmacokinetic benefits of nanoemulsions as nanocarriers and confirming the value of PARPi-FL as an imaging agent targeting PARP1 in small cell lung cancer.
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Affiliation(s)
- Junior Gonzales
- Department of Radiology , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States
| | - Susanne Kossatz
- Department of Radiology , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States
| | - Sheryl Roberts
- Department of Radiology , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States
| | - Giacomo Pirovano
- Department of Radiology , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States
| | - Christian Brand
- Department of Radiology , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States
| | - Carlos Pérez-Medina
- Translational and Molecular Imaging Institute, Department of Radiology , Icahn School of Medicine at Mount Sinai , New York , New York 10029 , United States
| | - Patrick Donabedian
- Department of Radiology , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States
| | - M Jason de la Cruz
- Structural Biology Program, Sloan Kettering Institute , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States
| | - Willem J M Mulder
- Translational and Molecular Imaging Institute, Department of Radiology , Icahn School of Medicine at Mount Sinai , New York , New York 10029 , United States.,Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems , Eindhoven University of Technology , Eindhoven , The Netherlands
| | - Thomas Reiner
- Department of Radiology , Memorial Sloan Kettering Cancer Center , New York , New York 10065 , United States.,Department of Radiology , Weill Cornell Medical College , New York , New York 10065 , United States
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27
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Micro-dosimetry calculation of Auger-electron-emitting radionuclides mostly used in nuclear medicine using GEANT4-DNA. Appl Radiat Isot 2018; 141:73-79. [DOI: 10.1016/j.apradiso.2018.08.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 08/20/2018] [Accepted: 08/21/2018] [Indexed: 11/20/2022]
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28
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Evlyukhin E, Kim E, Goldberger D, Cifligu P, Schyck S, Weck PF, Pravica M. High-pressure-assisted X-ray-induced damage as a new route for chemical and structural synthesis. Phys Chem Chem Phys 2018; 20:18949-18956. [PMID: 29868652 DOI: 10.1039/c8cp02119h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
X-ray induced damage has been known for decades and has largely been viewed as a tremendous nuisance. We, on the other hand, harness the highly ionizing and penetrating properties of hard X-rays to initiate novel decomposition and synthetic chemistry. Here, we show that powdered cesium oxalate monohydrate pressurized to ≤0.5 GPa and irradiated with X-rays of energies near the cesium K-edge undergoes molecular and structural transformations with one of the final products exhibiting a new type of bcc crystal structure that has previously not been observed. Additionally, based on cascades of ultrafast electronic relaxation steps triggered by the absorption of one X-ray photon, we propose a model explaining the X-ray induced damage of multitype bounded matter. As X-rays are ubiquitous, these results show promise in the preparation of novel compounds and novel structures that are inaccessible via conventional methods. They may offer insight into the formation of complex organic compounds in outer space.
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Affiliation(s)
- Egor Evlyukhin
- Department of Physics and Astronomy, University of Nevada Las Vegas (UNLV), 89154-4002 Las Vegas, Nevada, USA.
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Di Maria S, Belchior A, Romanets Y, Paulo A, Vaz P. Monte Carlo dose distribution calculation at nuclear level for Auger-emitting radionuclide energies. Appl Radiat Isot 2018; 135:72-77. [DOI: 10.1016/j.apradiso.2018.01.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 11/26/2017] [Accepted: 01/12/2018] [Indexed: 02/02/2023]
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30
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Righi S, Ugolini M, Bottoni G, Puntoni M, Iacozzi M, Paparo F, Cabria M, Ceriani L, Gambaro M, Giovanella L, Piccardo A. Biokinetic and dosimetric aspects of 64CuCl 2 in human prostate cancer: possible theranostic implications. EJNMMI Res 2018; 8:18. [PMID: 29492782 PMCID: PMC5833894 DOI: 10.1186/s13550-018-0373-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 02/20/2018] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The aim of the present study is to evaluate the kinetics and dosimetry of 64CuCl2 in human prostate cancer (PCa) lesions. We prospectively evaluated 50 PCa patients with biochemical relapse after surgery or external beam radiation therapy. All patients underwent 64CuCl2-PET/CT to detect PCa recurrence/metastases. Volumes of interest were manually drawn for each 64CuCl2 avid PCa lesion with a diameter > 1 cm on mpMRI in each patient. Time-activity curves for all lesions were obtained. The effective and biological half-life and the standard uptake values (SUVs) were calculated. Tumour/background ratio (TBR) curves as a function of time were considered. Finally, the absorbed dose per lesion was estimated. RESULTS The mean effective half-life of 64CuCl2 calculated in the lymph nodes (10.2 ± 1.7 h) was significantly higher than in local relapses (8.8 ± 1.1 h) and similar to that seen in bone metastases (9.0 ± 0.4 h). The mean 64CuCl2 SUVmax calculated 1 h after tracer injection was significantly higher in the lymph nodes (6.8 ± 4.3) and bone metastases (6.8 ± 2.9) than in local relapses (4.7 ± 2.4). TBR mean curve of 64CuCl2 revealed that the calculated TBRmax value was 5.0, 7.0, and 6.2 in local relapse and lymph node and bone metastases, respectively, and it was achieved about 1 h after 64CuCl2 injection. The mean absorbed dose of the PCa lesions per administrated activity was 6.00E-2 ± 4.74E-2mGy/MBq. Indeed, for an administered activity of 3.7 GBq, the mean dose absorbed by the lesion would be 0.22 Gy. CONCLUSIONS Dosimetry showed that the dose absorbed by PCa recurrences/metastases per administrated activity was low. The dosimetric study performed does not take into account the possible therapeutic effect of the Auger electrons. Clinical trials are needed to evaluate 64Cu internalization in the cell nucleus that seems related to the therapeutic effectiveness reported in preclinical studies.
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Affiliation(s)
- Sergio Righi
- Medical Physics Department, E.O. Galliera Hospital, Genoa, Italy
| | - Martina Ugolini
- Medical Physics Department, E.O. Galliera Hospital, Genoa, Italy
| | - Gianluca Bottoni
- Department of Nuclear Medicine, Galliera Hospital, Mura delle Cappuccine 14, 16128, Genoa, Italy
| | - Matteo Puntoni
- Clinical Trial Unit, Office of the Scientific Director, Galliera Hospital, Genoa, Italy
| | - Massimiliano Iacozzi
- Department of Nuclear Medicine, Galliera Hospital, Mura delle Cappuccine 14, 16128, Genoa, Italy
| | | | - Manlio Cabria
- Department of Nuclear Medicine, Galliera Hospital, Mura delle Cappuccine 14, 16128, Genoa, Italy
| | - Luca Ceriani
- Department of Nuclear Medicine, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
| | - Monica Gambaro
- Medical Physics Department, E.O. Galliera Hospital, Genoa, Italy
| | - Luca Giovanella
- Department of Nuclear Medicine, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland
| | - Arnoldo Piccardo
- Department of Nuclear Medicine, Galliera Hospital, Mura delle Cappuccine 14, 16128, Genoa, Italy.
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31
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Klinker M, Marante C, Argenti L, González-Vázquez J, Martín F. Electron Correlation in the Ionization Continuum of Molecules: Photoionization of N 2 in the Vicinity of the Hopfield Series of Autoionizing States. J Phys Chem Lett 2018; 9:756-762. [PMID: 29364687 DOI: 10.1021/acs.jpclett.7b03220] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Direct measurement of autoionization lifetimes by using time-resolved experimental techniques is a promising approach when energy-resolved spectroscopic methods do not work. Attosecond time-resolved experiments have recently provided the first quantitative determination of autoionization lifetimes of the lowest members of the well-known Hopfield series of resonances in N2. In this work, we have used the recently developed XCHEM approach to study photoionization of the N2 molecule in the vicinity of these resonances. The XCHEM approach allows us to describe electron correlation in the molecular electronic continuum at a level similar to that provided by multireference configuration interaction methods in bound state calculations, a necessary condition to accurately describe autoionization, shakeup, and interchannel couplings occurring in this range of photon energies. Our results show that electron correlation leading to interchannel mixing is the main factor that determines the magnitude and shape of the N2 photoionization cross sections, as well as the lifetimes of the Hopfield resonances. At variance with recent speculations, nonadiabatic effects do not seem to play a significant role. These conclusions are supported by the very good agreement between the calculated cross sections and those determined in synchrotron radiation and attosecond experiments.
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Affiliation(s)
- Markus Klinker
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain , EU
| | - Carlos Marante
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain , EU
| | - Luca Argenti
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain , EU
| | - Jesús González-Vázquez
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain , EU
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid , 28049 Madrid, Spain , EU
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco , 28049 Madrid, Spain , EU
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid , 28049 Madrid, Spain , EU
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32
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Wendisch M, Freudenberg R, Runge R, Oehme L, Meyer G, Kunz-Schughart LA, Wunderlich G, Kotzerke J. Sodium-iodide symporter positive cells after intracellular uptake of 99mTc versus α-emitter 211At. Nuklearmedizin 2018; 51:170-8. [DOI: 10.3413/nukmed-0506-12-05] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 08/30/2012] [Indexed: 11/20/2022]
Abstract
SummaryPurpose: We evaluated the DNA damaging potential of Auger electrons emitted in the decay of 99mTc compared to α-particles of 211At. Material and methods: The impact of 99mTc and 211At was monitored in a NIS-expressing rat thyroid cell model PC Cl3 with varying, yet defined intra- and extracellular radionuclide distribution (using ± perchlorate). The radiotoxicity of 99mTc and 211At was studied by the comet assay under neutral and alkaline conditions and colony formation. Results: In the presence of perchlorate, the radioactivity yielding 37 % cellular survival, A37, was estimated to be (0.27 ± 0.02) MBq/ml and (450 ± 30) MBq/ml for 211At and 99mTc, respectively. In absence of perchlorate, cellular radiotracer uptake was similar for both radionuclides (2.2 %, 2.7 %), yet the A37 was reduced by 82% for the α-emitter and by 95 % for 99mTc. Cellular dose increased by a factor of 5 (211At) and 38 (99mTc). Comet assays revealed an increased DNA damage after intracellular uptake of both radiotracers. Conclusions: The data indicate damage to the cell to occur from absorbed dose without recognizable contribution from intracellular heterogeneity of radionuclide distribution. Comet assay under alkaline and neutral conditions did not reveal any shift to more complex DNA damage after radionuclide uptake. Cellular uptake of 99mTc and 211At increased cellular dose and reduced clonogenic survival.
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33
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Céolin D, Kryzhevoi NV, Nicolas C, Pokapanich W, Choksakulporn S, Songsiriritthigul P, Saisopa T, Rattanachai Y, Utsumi Y, Palaudoux J, Öhrwall G, Rueff JP. Ultrafast Charge Transfer Processes Accompanying KLL Auger Decay in Aqueous KCl Solution. PHYSICAL REVIEW LETTERS 2017; 119:263003. [PMID: 29328710 DOI: 10.1103/physrevlett.119.263003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Indexed: 06/07/2023]
Abstract
X-ray photoelectron and KLL Auger spectra were measured for the K^{+} and Cl^{-} ions in aqueous KCl solution. While the XPS spectra of these ions have similar structures, both exhibiting only weak satellites near the main line, the Auger spectra differ dramatically. Contrary to the chloride case, a very strong extra peak was found in the Auger spectrum of K^{+} at the low kinetic energy side of the ^{1}D state. Using the equivalent core model and ab initio calculations this spectral feature was assigned to electron transfer processes from solvent water molecules to the solvated cation. The observed charge transfer processes are suggested to play an important role in charge redistribution following single and multiple core-hole creation in atoms and molecules placed into environment.
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Affiliation(s)
- D Céolin
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette Cedex, France
| | - N V Kryzhevoi
- Theoretical Chemistry, Institute of Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
| | - Ch Nicolas
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette Cedex, France
| | - W Pokapanich
- Faculty of Science, Nakhon Phanom University, Nakhon Phanom 48000 Thailand
| | - S Choksakulporn
- Faculty of Science, Nakhon Phanom University, Nakhon Phanom 48000 Thailand
| | - P Songsiriritthigul
- NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials and School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - T Saisopa
- NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials and School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Y Rattanachai
- Department of Applied Physics, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand
| | - Y Utsumi
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette Cedex, France
| | - J Palaudoux
- CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Sorbonne Universités, UPMC Université Paris 06, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - G Öhrwall
- MAX IV Laboratory, Lund University, P.O. Box 118, SE-22100 Lund, Sweden
| | - J-P Rueff
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, F-91192 Gif-sur-Yvette Cedex, France
- CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Sorbonne Universités, UPMC Université Paris 06, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
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34
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Di Maria S, Belchior A, Pereira E, Quental L, Oliveira M, Mendes F, Lavrado J, Paulo A, Vaz P. Dosimetry assessment of DNA damage by Auger-emitting radionuclides: Experimental and Monte Carlo studies. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2017.01.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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Streitmatter SW, Stewart RD, Jenkins PA, Jevremovic T. DNA double strand break (DSB) induction and cell survival in iodine-enhanced computed tomography (CT). Phys Med Biol 2017; 62:6164-6184. [PMID: 28703119 DOI: 10.1088/1361-6560/aa772d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A multi-scale Monte Carlo model is proposed to assess the dosimetric and biological impact of iodine-based contrast agents commonly used in computed tomography. As presented, the model integrates the general purpose MCNP6 code system for larger-scale radiation transport and dose assessment with the Monte Carlo damage simulation to determine the sub-cellular characteristics and spatial distribution of initial DNA damage. The repair-misrepair-fixation model is then used to relate DNA double strand break (DSB) induction to reproductive cell death. Comparisons of measured and modeled changes in reproductive cell survival for ultrasoft characteristic k-shell x-rays (0.25-4.55 keV) up to orthovoltage (200-500 kVp) x-rays indicate that the relative biological effectiveness (RBE) for DSB induction is within a few percent of the RBE for cell survival. Because of the very short range of secondary electrons produced by low energy x-ray interactions with contrast agents, the concentration and subcellular distribution of iodine within and near cellular targets have a significant impact on the estimated absorbed dose and number of DSB produced in the cell nucleus. For some plausible models of the cell-level distribution of contrast agent, the model predicts an increase in RBE-weighted dose (RWD) for the endpoint of DSB induction of 1.22-1.40 for a 5-10 mg ml-1 iodine concentration in blood compared to an RWD increase of 1.07 ± 0.19 from a recent clinical trial. The modeled RWD of 2.58 ± 0.03 is also in good agreement with the measured RWD of 2.3 ± 0.5 for an iodine concentration of 50 mg ml-1 relative to no iodine. The good agreement between modeled and measured DSB and cell survival estimates provides some confidence that the presented model can be used to accurately assess biological dose for other concentrations of the same or different contrast agents.
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Affiliation(s)
- Seth W Streitmatter
- Nuclear Engineering Program, The University of Utah, 50 S. Central Campus Drive, 1206 MEB, Salt Lake City, UT 84112, United States of America. Department of Radiology and Imaging Sciences, University of Utah Health, 30 North 1900 East #1A71, Salt Lake City, UT 84132, United States of America
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36
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Rezaee M, Hill RP, Jaffray DA. The Exploitation of Low-Energy Electrons in Cancer Treatment. Radiat Res 2017; 188:123-143. [PMID: 28557630 DOI: 10.1667/rr14727.1] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Given the distinct characteristics of low-energy electrons (LEEs), particularly at energies less than 30 eV, they can be applied to a wide range of therapeutic modalities to improve cancer treatment. LEEs have been shown to efficiently produce complex molecular damage resulting in substantial cellular toxicities. Since LEEs are produced in copious amounts from high-energy radiation beam, including photons, protons and ions; the control of LEE distribution can potentially enhance the therapeutic radio of such beams. LEEs can play a substantial role in the synergistic effect between radiation and chemotherapy, particularly halogenated and platinum-based anticancer drugs. Radiosensitizing entities containing atoms of high atomic number such as gold nanoparticles can be a source of LEE production if high-energy radiation interacts with them. This can provide a high local density of LEEs in a cell and produce cellular toxicity. Auger-electron-emitting radionuclides also create a high number of LEEs in each decay, which can induce lethal damage in a cell. Exploitation of LEEs in cancer treatment, however, faces a few challenges, such as dosimetry of LEEs and selective delivery of radiosensitizing and chemotherapeutic molecules close to cellular targets. This review first discusses the rationale for utilizing LEEs in cancer treatment by explaining their mechanism of action, describes theoretical and experimental studies at the molecular and cellular levels, then discusses strategies for achieving modification of the distribution and effectiveness of LEEs in cancerous tissue and their associated clinical benefit.
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Affiliation(s)
- Mohammad Rezaee
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Ontario Cancer Institute and Campbell Family Institute for Cancer Research and Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
| | - Richard P Hill
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Ontario Cancer Institute and Campbell Family Institute for Cancer Research and Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
| | - David A Jaffray
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Ontario Cancer Institute and Campbell Family Institute for Cancer Research and Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
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37
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Affiliation(s)
- Akinari Yokoya
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, Naka, Ibaraki, Japan
| | - Takashi Ito
- Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Tokyo, Japan
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38
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Unger I, Seidel R, Thürmer S, Pohl MN, Aziz EF, Cederbaum LS, Muchová E, Slavíček P, Winter B, Kryzhevoi NV. Observation of electron-transfer-mediated decay in aqueous solution. Nat Chem 2017. [DOI: 10.1038/nchem.2727] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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39
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You D, Fukuzawa H, Sakakibara Y, Takanashi T, Ito Y, Maliyar GG, Motomura K, Nagaya K, Nishiyama T, Asa K, Sato Y, Saito N, Oura M, Schöffler M, Kastirke G, Hergenhahn U, Stumpf V, Gokhberg K, Kuleff AI, Cederbaum LS, Ueda K. Charge transfer to ground-state ions produces free electrons. Nat Commun 2017; 8:14277. [PMID: 28134238 PMCID: PMC5290264 DOI: 10.1038/ncomms14277] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 12/09/2016] [Indexed: 11/09/2022] Open
Abstract
Inner-shell ionization of an isolated atom typically leads to Auger decay. In an environment, for example, a liquid or a van der Waals bonded system, this process will be modified, and becomes part of a complex cascade of relaxation steps. Understanding these steps is important, as they determine the production of slow electrons and singly charged radicals, the most abundant products in radiation chemistry. In this communication, we present experimental evidence for a so-far unobserved, but potentially very important step in such relaxation cascades: Multiply charged ionic states after Auger decay may partially be neutralized by electron transfer, simultaneously evoking the creation of a low-energy free electron (electron transfer-mediated decay). This process is effective even after Auger decay into the dicationic ground state. In our experiment, we observe the decay of Ne2+ produced after Ne 1s photoionization in Ne-Kr mixed clusters.
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Affiliation(s)
- D You
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - H Fukuzawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - Y Sakakibara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - T Takanashi
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - Y Ito
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - G G Maliyar
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - K Motomura
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - K Nagaya
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.,Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T Nishiyama
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.,Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - K Asa
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.,Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Y Sato
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.,Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - N Saito
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.,National Metrology Institute of Japan, AIST, Tsukuba 305-8568, Japan
| | - M Oura
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
| | - M Schöffler
- RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.,Institute for Nuclear Physics, Johann Wolfgang Goethe University Frankfurt, Frankfurt 60438, Germany
| | - G Kastirke
- Institute for Nuclear Physics, Johann Wolfgang Goethe University Frankfurt, Frankfurt 60438, Germany
| | - U Hergenhahn
- Leibniz Institute of Surface Modification, Leipzig 04318, Germany.,Max-Planck-Institute for Plasma Physics, Greifswald 17491, Germany
| | - V Stumpf
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - K Gokhberg
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - A I Kuleff
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - L S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
| | - K Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.,RIKEN SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
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40
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Jeon JK, Han SM, Min SK, Seo SJ, Ihm K, Chang WS, Kim JK. Coulomb nanoradiator-mediated, site-specific thrombolytic proton treatment with a traversing pristine Bragg peak. Sci Rep 2016; 6:37848. [PMID: 27897205 PMCID: PMC5126678 DOI: 10.1038/srep37848] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 10/31/2016] [Indexed: 12/28/2022] Open
Abstract
Traversing proton beam-irradiated, mid/high-Z nanoparticles produce site-specific enhancement of X-ray photon-electron emission via the Coulomb nanoradiator (CNR) effect, resulting in a nano- to micro-scale therapeutic effect at the nanoparticle-uptake target site. Here, we demonstrate the uptake of iron oxide nanoparticles (IONs) and nanoradiator-mediated, site-specific thrombolysis without damaging the vascular endothelium in an arterial thrombosis mouse model. The enhancement of low-energy electron (LEE) emission and reactive oxygen species (ROS) production from traversing proton beam-irradiated IONs was examined. Flow recovery was only observed in CNR-treated mice, and greater than 50% removal of the thrombus was achieved. A 2.5-fold greater reduction in the thrombus-enabled flow recovery was observed in the CNR group compared with that observed in the untreated ION-only and proton-only control groups (p < 0.01). Enhancement of the X-ray photon-electron emission was evident from both the pronounced Shirley background in the electron yield and the 1.2- to 2.5-fold enhanced production of ROS by the proton-irradiated IONs, which suggests chemical degradation of the thrombus without potent emboli.
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Affiliation(s)
- Jae-Kun Jeon
- Departments of Biomedical Engineering, Catholic University of Daegu, School of Medicine, Daegu, Korea
| | - Sung-Mi Han
- Anatomy, and Diagnostic Imaging, Catholic University of Daegu, School of Medicine, Daegu, Korea
| | - Soon-Ki Min
- Catholic University of Daegu, School of Medicine, Daegu, Korea
| | - Seung-Jun Seo
- Departments of Biomedical Engineering, Catholic University of Daegu, School of Medicine, Daegu, Korea
| | - Kyuwook Ihm
- Pohang Accelerator Laboratory, Pohang, Korea
| | - Won-Seok Chang
- Departments of Biomedical Engineering, Catholic University of Daegu, School of Medicine, Daegu, Korea
| | - Jong-Ki Kim
- Departments of Biomedical Engineering, Catholic University of Daegu, School of Medicine, Daegu, Korea
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41
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Šefl M, Kyriakou I, Emfietzoglou D. Technical Note: Impact of cell repopulation and radionuclide uptake phase on cell survival. Med Phys 2016; 43:2715-2720. [DOI: 10.1118/1.4948504] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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42
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Maucksch U, Runge R, Wunderlich G, Freudenberg R, Naumann A, Kotzerke J. Comparison of the radiotoxicity of the 99mTc-labeled compounds 99mTc-pertechnetate, 99mTc-HMPAO and 99mTc-MIBI. Int J Radiat Biol 2016; 92:698-706. [DOI: 10.3109/09553002.2016.1168533] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Ute Maucksch
- University Hospital/Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Department of Nuclear Medicine, Dresden, Germany
| | - Roswitha Runge
- University Hospital/Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Department of Nuclear Medicine, Dresden, Germany
| | - Gerd Wunderlich
- University Hospital/Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Department of Nuclear Medicine, Dresden, Germany
| | - Robert Freudenberg
- University Hospital/Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Department of Nuclear Medicine, Dresden, Germany
| | - Anne Naumann
- University Hospital/Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Department of Nuclear Medicine, Dresden, Germany
| | - Jörg Kotzerke
- University Hospital/Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Department of Nuclear Medicine, Dresden, Germany
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43
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Martin RF, Feinendegen LE. The quest to exploit the Auger effect in cancer radiotherapy - a reflective review. Int J Radiat Biol 2016; 92:617-632. [PMID: 26926313 DOI: 10.3109/09553002.2015.1136854] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
To identify the emergence of the recognition of the potential of the Auger effect for clinical application, and after tracing the salient milestones towards that goal, to evaluate the status quo and future prospects. It was not until 40 years after the discovery of Auger electrons, that the availability of radioactive DNA precursors enabled the biological power, and the clinical potential, of the Auger effect to be appreciated. Important milestones on the path to clinical translation have been identified and reached, but hurdles remain. Nevertheless the potential is still evident, and there is reasonable optimism that the goal of clinical translation is achievable.
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Affiliation(s)
- Roger F Martin
- a Molecular Radiation Biology Laboratory , Peter MacCallum Cancer Centre.,b The Sir Peter MacCallum Department of Oncology , The University of Melbourne.,c School of Chemistry and Bio-21 Molecular Science and Biotechnology Institute , University of Melbourne , Melbourne , Australia
| | - Ludwig E Feinendegen
- d Heinrich-Heine-University Düsseldorf , Germany.,e Brookhaven National Laboratory , Upton , NY , USA
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44
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The role of metal ions in X-ray-induced photochemistry. Nat Chem 2016; 8:237-41. [DOI: 10.1038/nchem.2429] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 11/23/2015] [Indexed: 01/23/2023]
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45
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Calculation of cellular S-values using Geant4-DNA: The effect of cell geometry. Appl Radiat Isot 2015; 104:113-23. [DOI: 10.1016/j.apradiso.2015.06.027] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 06/16/2015] [Accepted: 06/18/2015] [Indexed: 11/19/2022]
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46
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Ferl S, Wunderlich G, Smits R, Hoepping A, Naumann A, Kotzerke J. Synthesis of a new HYNIC-DAPI derivative for labelling with 99mTechnetium and its in vitro evaluation in an FRTL5 cell line. MEDCHEMCOMM 2015. [DOI: 10.1039/c4md00574k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A new multifunctional compound that includes the fluorescent dye 4′,6-diamidine-2-phenylindole (DAPI) and the chelator 6-hydrazinonicotinic acid (HYNIC) was developed and radiolabelled with 99mTc for in vitro evaluation in an FRTL5 cell line.
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Affiliation(s)
- Sandra Ferl
- Technische Universität Dresden
- Faculty of Medicine Carl Gustav Carus
- Department of Nuclear Medicine
- 01307 Dresden
- Germany
| | - Gerd Wunderlich
- Technische Universität Dresden
- Faculty of Medicine Carl Gustav Carus
- Department of Nuclear Medicine
- 01307 Dresden
- Germany
| | - René Smits
- ABX advanced biochemical compounds GmbH
- 01454 Radeberg
- Germany
| | | | - Anne Naumann
- Technische Universität Dresden
- Faculty of Medicine Carl Gustav Carus
- Department of Nuclear Medicine
- 01307 Dresden
- Germany
| | - Jörg Kotzerke
- Technische Universität Dresden
- Faculty of Medicine Carl Gustav Carus
- Department of Nuclear Medicine
- 01307 Dresden
- Germany
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47
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Radioimmunotherapy: a specific treatment protocol for cancer by cytotoxic radioisotopes conjugated to antibodies. ScientificWorldJournal 2014; 2014:492061. [PMID: 25379535 PMCID: PMC4213411 DOI: 10.1155/2014/492061] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 08/04/2014] [Indexed: 12/23/2022] Open
Abstract
Radioimmunotherapy (RIT) represents a selective internal radiation therapy, that is, the use of radionuclides conjugated to tumor-directed monoclonal antibodies (including those fragments) or peptides. In a clinical field, two successful examples of this treatment protocol are currently extended by 90Y-ibritumomab tiuxetan (Zevalin) and 131I-tositumomab (Bexxar), both of which are anti-CD20 monoclonal antibodies coupled to cytotoxic radioisotopes and are approved for the treatment of non-Hodgkin lymphoma patients. In addition, some beneficial observations are obtained in preclinical studies targeting solid tumors. To date, in order to reduce the unnecessary exposure and to enhance the therapeutic efficacy, various biological, chemical, and treatment procedural improvements have been investigated in RIT. This review outlines the fundamentals of RIT and current knowledge of the preclinical/clinical trials for cancer treatment.
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48
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Rezaee M, Hunting DJ, Sanche L. Correlation between energy deposition and molecular damage from Auger electrons: A case study of ultra-low energy (5-18 eV) electron interactions with DNA. Med Phys 2014; 41:072502. [PMID: 24989405 PMCID: PMC4623756 DOI: 10.1118/1.4881329] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 05/13/2014] [Accepted: 05/18/2014] [Indexed: 11/07/2022] Open
Abstract
PURPOSE The present study introduces a new method to establish a direct correlation between biologically related physical parameters (i.e., stopping and damaging cross sections, respectively) for an Auger-electron emitting radionuclide decaying within a target molecule (e.g., DNA), so as to evaluate the efficacy of the radionuclide at the molecular level. These parameters can be applied to the dosimetry of Auger electrons and the quantification of their biological effects, which are the main criteria to assess the therapeutic efficacy of Auger-electron emitting radionuclides. METHODS Absorbed dose and stopping cross section for the Auger electrons of 5-18 eV emitted by(125)I within DNA were determined by developing a nanodosimetric model. The molecular damages induced by these Auger electrons were investigated by measuring damaging cross section, including that for the formation of DNA single- and double-strand breaks. Nanoscale films of pure plasmid DNA were prepared via the freeze-drying technique and subsequently irradiated with low-energy electrons at various fluences. The damaging cross sections were determined by employing a molecular survival model to the measured exposure-response curves for induction of DNA strand breaks. RESULTS For a single decay of(125)I within DNA, the Auger electrons of 5-18 eV deposit the energies of 12.1 and 9.1 eV within a 4.2-nm(3) volume of a hydrated or dry DNA, which results in the absorbed doses of 270 and 210 kGy, respectively. DNA bases have a major contribution to the deposited energies. Ten-electronvolt and high linear energy transfer 100-eV electrons have a similar cross section for the formation of DNA double-strand break, while 100-eV electrons are twice as efficient as 10 eV in the induction of single-strand break. CONCLUSIONS Ultra-low-energy electrons (<18 eV) substantially contribute to the absorbed dose and to the molecular damage from Auger-electron emitting radionuclides; hence, they should be considered in the dosimetry calculation of such radionuclides. Moreover, absorbed dose is not an appropriate physical parameter for nanodosimetry. Instead, stopping cross section, which describes the probability of energy deposition in a target molecule can be an appropriate nanodosimetric parameter. The stopping cross section is correlated with a damaging cross section (e.g., cross section for the double-strand break formation) to quantify the number of each specific lesion in a target molecule for each nuclear decay of a single Auger-electron emitting radionuclide.
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Affiliation(s)
- Mohammad Rezaee
- Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Darel J. Hunting
- Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Léon Sanche
- Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
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49
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Miteva T, Klaiman S, Gromov EV, Gokhberg K. Ionization satellites of the ArHe dimer. J Chem Phys 2014; 140:204320. [DOI: 10.1063/1.4879662] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Tsveta Miteva
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Shachar Klaiman
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Evgeniy V Gromov
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Kirill Gokhberg
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
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50
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Piron B, Paillas S, Boudousq V, Pèlegrin A, Bascoul-Mollevi C, Chouin N, Navarro-Teulon I, Pouget JP. DNA damage-centered signaling pathways are effectively activated during low dose-rate Auger radioimmunotherapy. Nucl Med Biol 2014; 41 Suppl:e75-83. [DOI: 10.1016/j.nucmedbio.2014.01.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 01/23/2014] [Accepted: 01/30/2014] [Indexed: 11/28/2022]
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