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Markmann V, Pan J, Hansen BL, Haubro ML, Nimmrich A, Lenzen P, Levantino M, Katayama T, Adachi SI, Gorski-Bilke S, Temps F, Dohn AO, Møller KB, Nielsen MM, Haldrup K. Real-time structural dynamics of the ultrafast solvation process around photo-excited aqueous halides. Chem Sci 2024; 15:11391-11401. [PMID: 39055005 PMCID: PMC11268492 DOI: 10.1039/d4sc01912a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 06/11/2024] [Indexed: 07/27/2024] Open
Abstract
This work investigates and describes the structural dynamics taking place following charge-transfer-to-solvent photo-abstraction of electrons from I- and Br- ions in aqueous solution following single- and 2-photon excitation at 202 nm and 400 nm, respectively. A Time-Resolved X-ray Solution Scattering (TR-XSS) approach with direct sensitivity to the structure of the surrounding solvent as the water molecules adopt a new equilibrium configuration following the electron-abstraction process is utilized to investigate the structural dynamics of solvent shell expansion and restructuring in real-time. The structural sensitivity of the scattering data enables a quantitative evaluation of competing models for the interaction between the nascent neutral species and surrounding water molecules. Taking the I0-O distance as the reaction coordinate, we find that the structural reorganization is delayed by 0.1 ps with respect to the photoexcitation and completes on a time scale of 0.5-1 ps. On longer time scales we determine from the evolution of the TR-XSS difference signal that I0: e- recombination takes place on two distinct time scales of ∼20 ps and 100 s of picoseconds. These dynamics are well captured by a simple model of diffusive evolution of the initial photo-abstracted electron population where the charge-transfer-to-solvent process gives rise to a broad distribution of electron ejection distances, a significant fraction of which are in the close vicinity of the nascent halogen atoms and recombine on short time scales.
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Affiliation(s)
- Verena Markmann
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
| | - Jaysree Pan
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
| | - Bianca L Hansen
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
| | - Morten L Haubro
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
| | - Amke Nimmrich
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
- Department of Chemistry and Molecular Biology, University of Gothenburg Gothenburg Sweden
| | - Philipp Lenzen
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
| | - Matteo Levantino
- European Synchrotron Radiation Facility CS40220 Grenoble 38043 Cedex 9 France
| | - Tetsuo Katayama
- Japan Synchrotron Radiation Research Institute Kouto 1-1-1, Sayo Hyogo 679-5198 Japan
- RIKEN SPring-8 Center 1-1-1 Kouto, Sayo Hyogo 679-5148 Japan
| | - Shin-Ichi Adachi
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK) 1-1 Oho, Tsukuba Ibaraki 305-0801 Japan
- Department of Materials Structure Science, School of High Energy Accelerator Science 1-1 Oho, Tsukuba Ibaraki 305-0801 Japan
| | | | - Friedrich Temps
- Christian-Albrechts-University Kiel Olshausenstr. 40 24098 Kiel Germany
| | - Asmus O Dohn
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
- Science Institute, University of Iceland 107 Reykjavík Iceland
| | - Klaus B Møller
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
| | - Martin M Nielsen
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
| | - Kristoffer Haldrup
- Technical University of Denmark Anker Engelunds Vej 1 2800 Lyngby Denmark
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2
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Huang WQ, Zhu YQ, Gao F, You W, Chen G, Nie X, Xia L, Wang LH, Hong CY, Zhang Z, Wang F, Yu Y, You YZ. Nanogalvanic Cells Release Highly Reactive Electrons in Tumors to Effectively Eliminate Tumors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2404199. [PMID: 38734974 DOI: 10.1002/adma.202404199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/06/2024] [Indexed: 05/13/2024]
Abstract
External stimuli triggering chemical reactions in cancer cells to generate highly reactive chemical species are very appealing for cancer therapy, in which external irradiation activating sensitizers to transfer energy or electrons to surrounding oxygen or other molecules is critical for generating cytotoxic reactive species. However, poor light penetration into tissue, low activity of sensitizers, and reliance on oxygen supply restrict the generation of cytotoxic chemical species in hypoxic tumors, which lowers the therapeutic efficacy. Here, this work presents galvanic cell nanomaterials that can directly release highly reactive electrons in tumors without external irradiation or photosensitizers. The released reactive electrons directly react with surrounding biomolecules such as proteins and DNA within tumors to destroy them or react with other surrounding (bio)molecules to yield cytotoxic chemical species to eliminate tumors independent of oxygen. Administering these nanogalvanic cells to mice results in almost complete remission of subcutaneous solid tumors and deep metastatic tumors. The results demonstrate that this strategy can further arouse an immune response even in a hypoxic environment. This method offers a promising approach to effectively eliminate tumors, similar to photodynamic therapy, but does not require oxygen or irradiation to activate photosensitizers.
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Affiliation(s)
- Wei-Qiang Huang
- The Department of Gastroenterology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Ya-Qi Zhu
- The Department of Gastroenterology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Fan Gao
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wei You
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Guang Chen
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xuan Nie
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Lei Xia
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Long-Hai Wang
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Chun-Yan Hong
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Ze Zhang
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Fei Wang
- Department of Neurosurgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Yue Yu
- The Department of Gastroenterology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Ye-Zi You
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
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3
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Martin-Roy R, Thyrring J, Mata X, Bangsgaard P, Bennike O, Christiansen G, Funder S, Gotfredsen AB, Gregersen KM, Hansen CH, Ilsøe PC, Klassen L, Kristensen IK, Ravnholt GB, Marin F, Der Sarkissian C. Advancing responsible genomic analyses of ancient mollusc shells. PLoS One 2024; 19:e0302646. [PMID: 38709766 PMCID: PMC11073703 DOI: 10.1371/journal.pone.0302646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 04/09/2024] [Indexed: 05/08/2024] Open
Abstract
The analysis of the DNA entrapped in ancient shells of molluscs has the potential to shed light on the evolution and ecology of this very diverse phylum. Ancient genomics could help reconstruct the responses of molluscs to past climate change, pollution, and human subsistence practices at unprecedented temporal resolutions. Applications are however still in their infancy, partly due to our limited knowledge of DNA preservation in calcium carbonate shells and the need for optimized methods for responsible genomic data generation. To improve ancient shell genomic analyses, we applied high-throughput DNA sequencing to 27 Mytilus mussel shells dated to ~111-6500 years Before Present, and investigated the impact, on DNA recovery, of shell imaging, DNA extraction protocols and shell sub-sampling strategies. First, we detected no quantitative or qualitative deleterious effect of micro-computed tomography for recording shell 3D morphological information prior to sub-sampling. Then, we showed that double-digestion and bleach treatment of shell powder prior to silica-based DNA extraction improves shell DNA recovery, also suggesting that DNA is protected in preservation niches within ancient shells. Finally, all layers that compose Mytilus shells, i.e., the nacreous (aragonite) and prismatic (calcite) carbonate layers, with or without the outer organic layer (periostracum) proved to be valuable DNA reservoirs, with aragonite appearing as the best substrate for genomic analyses. Our work contributes to the understanding of long-term molecular preservation in biominerals and we anticipate that resulting recommendations will be helpful for future efficient and responsible genomic analyses of ancient mollusc shells.
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Affiliation(s)
- Raphaël Martin-Roy
- Centre for Anthropobiology and Genomics of Toulouse, UMR5288, CNRS, University Paul Sabatier, Toulouse, France
| | - Jakob Thyrring
- Department of Ecoscience, Aarhus University, Aarhus, Denmark
- Arctic Research Centre, Aarhus University, Aarhus, Denmark
| | - Xavier Mata
- Centre for Anthropobiology and Genomics of Toulouse, UMR5288, CNRS, University Paul Sabatier, Toulouse, France
| | - Pernille Bangsgaard
- Globe Institute, Section for GeoGenetics, University of Copenhagen, Copenhagen, Denmark
| | - Ole Bennike
- Geological Survey of Denmark and Greenland, Copenhagen, Denmark
| | | | - Svend Funder
- Globe Institute, Section for GeoGenetics, University of Copenhagen, Copenhagen, Denmark
| | | | | | | | - Peter Carsten Ilsøe
- Globe Institute, Section for GeoGenetics, University of Copenhagen, Copenhagen, Denmark
| | | | | | | | - Frédéric Marin
- Biogéosciences, UMR6282, CNRS-EPHE-uB, University of Burgundy, EPHE, Dijon, France
| | - Clio Der Sarkissian
- Centre for Anthropobiology and Genomics of Toulouse, UMR5288, CNRS, University Paul Sabatier, Toulouse, France
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4
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Johny M, Schouder CA, Al-Refaie A, He L, Wiese J, Stapelfeldt H, Trippel S, Küpper J. Water is a radiation protection agent for ionised pyrrole. Phys Chem Chem Phys 2024; 26:13118-13130. [PMID: 38629233 DOI: 10.1039/d3cp03471b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Radiation-induced damage of biological matter is an ubiquitous problem in nature. The influence of the hydration environment is widely discussed, but its exact role remains elusive. Utilising well defined solvated-molecule aggregates, we experimentally observed a hydrogen-bonded water molecule acting as a radiation protection agent for ionised pyrrole, a prototypical aromatic biomolecule. Pure samples of pyrrole and pyrrole(H2O) were outer-valence ionised and the subsequent damage and relaxation processes were studied. Bare pyrrole ions fragmented through the breaking of C-C or N-C covalent bonds. However, for pyrrole(H2O)+, we observed a strong protection of the pyrrole ring through the dissociative release of neutral water or by transferring an electron or proton across the hydrogen bond. Overall, a single water molecule strongly reduces the fragmentation probability and thus the persistent radiation damage of singly-ionised pyrrole.
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Affiliation(s)
- Melby Johny
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.
- Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
- Department of Physics, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Constant A Schouder
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
- LIDYL, CNRS, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Ahmed Al-Refaie
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.
| | - Lanhai He
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.
| | - Joss Wiese
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.
- Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
- Department of Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
| | - Henrik Stapelfeldt
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Sebastian Trippel
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.
- Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Jochen Küpper
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.
- Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
- Department of Physics, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
- Department of Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
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5
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Matsuya Y, Yoshii Y, Kusumoto T, Akamatsu K, Hirata Y, Sato T, Kai T. A step-by-step simulation code for estimating yields of water radiolysis species based on electron track-structure mode in the PHITS code. Phys Med Biol 2024; 69:035005. [PMID: 38157551 DOI: 10.1088/1361-6560/ad199b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
Objective. Time-dependent yields of chemical products resulting from water radiolysis play a great role in evaluating DNA damage response after exposure to ionizing radiation. Particle and Heavy Ion Transport code System (PHITS) is a general-purpose Monte Carlo simulation code for radiation transport, which simulates atomic interactions originating from discrete energy levels of ionizations and electronic excitations as well as molecular excitations as physical stages. However, no chemical code for simulating water radiolysis products exists in the PHITS package.Approach.Here, we developed a chemical simulation code dedicated to the PHITS code, hereafter calledPHITS-Chemcode, which enables the calculation of theGvalues of water radiolysis species (•OH, eaq-, H2, H2O2etc) by electron beams.Main results.The estimatedGvalues during 1 μs are in agreement with the experimental ones and other simulations. ThisPHITS-Chemcode also simulates the radiolysis in the presence of OH radical scavengers, such as tris(hydroxymethyl)aminomethane and dimethyl sulfoxide. Thank to this feature, the contributions of direct and indirect effects on DNA damage induction under various scavenging capacities can be analyzed.Significance.This chemical code coupled with PHITS could contribute to elucidating the mechanism of radiation effects by connecting physical, physicochemical, and chemical processes.
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Affiliation(s)
- Yusuke Matsuya
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
- Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan
| | - Yuji Yoshii
- Department of Radiological Technology, Faculty of Health Sciences, Hokkaido University of Science, Maeda 7-15, Teine-ku, Sapporo 006-8585, Japan
| | - Tamon Kusumoto
- National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, 263-8555 Chiba, Japan
| | - Ken Akamatsu
- Institute for Quantum life Science, Quantum Life and Medical Science Directorate, National Institutes of Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa-shi, Kyoto, 619-0215, Japan
| | - Yuho Hirata
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
| | - Tatsuhiko Sato
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
| | - Takeshi Kai
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
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6
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Verma P, Mukherjee M, Bhattacharya D, Haritan I, Dutta AK. Shape resonance induced electron attachment to cytosine: The effect of aqueous media. J Chem Phys 2023; 159:214303. [PMID: 38038205 DOI: 10.1063/5.0157576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/31/2023] [Indexed: 12/02/2023] Open
Abstract
We have investigated the impact of microsolvation on shape-type resonance states of nucleobases, taking cytosine as a case study. To characterize the resonance position and decay width of the metastable states, we employed the newly developed DLPNO-based EA-EOM-CCSD method in conjunction with the resonance via Padé (RVP) method. Our calculations show that the presence of water molecules causes a redshift in the resonance position and an increase in the lifetime for the three lowest-lying resonance states of cytosine. Furthermore, there are some indications that the lowest resonance state in isolated cytosine may get converted to a bound state in the presence of an aqueous environment. The obtained results are extremely sensitive to the basis set used for the calculations.
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Affiliation(s)
- Pooja Verma
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Madhubani Mukherjee
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, USA
| | - Debarati Bhattacharya
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Idan Haritan
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 3200003, Israel
- Faculty of Engineering, Bar-Ilan University, Ramat Gan, Israel
| | - Achintya Kumar Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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7
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Kai T, Toigawa T, Matsuya Y, Hirata Y, Tezuka T, Tsuchida H, Yokoya A. First-principles simulation of an ejected electron produced by monochromatic deposition energy to water at the femtosecond order. RSC Adv 2023; 13:32371-32380. [PMID: 37928859 PMCID: PMC10623242 DOI: 10.1039/d3ra05075k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/29/2023] [Indexed: 11/07/2023] Open
Abstract
This study uses a time-dependent first-principles simulation code to investigate the transient dynamics of an ejected electron produced in the monochromatic deposition energy from 11 to 19 eV in water. The energy deposition forms a three-body single spur comprising a hydroxyl radical (OH˙), hydronium ion (H3O+), and hydrated electron (eaq-). The earliest formation involves electron thermalization and delocalization dominated by the molecular excitation of water. Our simulation results show that the transient electron dynamics primarily depends on the amount of deposition energy to water; the thermalization time varies from 200 to 500 fs, and the delocalization varies from 3 to 10 nm in this energy range. These features are crucial for determining the earliest single-spur formation and facilitating a sequential simulation from an energy deposition to a chemical reaction in water photolysis or radiolysis. The spur radius obtained from the simulation correlates reasonably with the experimental-based estimations. Our results should provide universalistic insights for analysing ultrafast phenomena dominated by the molecular excitation of water in the femtosecond order.
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Affiliation(s)
- Takeshi Kai
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Tomohiro Toigawa
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Yusuke Matsuya
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
- Faculty of Health Sciences, Hokkaido University Kita-12 Nishi-5, Kita-ku Sapporo Hokkaido 060-0812 Japan
| | - Yuho Hirata
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Tomoya Tezuka
- Department of Nuclear Engineering, Kyoto University Nishikyo-ku Kyoto 615-8530 Japan
| | - Hidetsugu Tsuchida
- Department of Nuclear Engineering, Kyoto University Nishikyo-ku Kyoto 615-8530 Japan
- Quantum Science and Engineering Center, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
| | - Akinari Yokoya
- Institute for Quantum Life Science, National Institutes for Quantum Science and Technology 4-9-1 Anagawa, Inage-ku Chiba-shi 263-8555 Japan
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8
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Kumar S, Hoshino M, Kerkeni B, García G, Limão-Vieira P. Isotope Effect in D 2O Negative Ion Formation in Electron Transfer Experiments: DO-D Bond Dissociation Energy. J Phys Chem Lett 2023; 14:5362-5369. [PMID: 37276433 PMCID: PMC10278136 DOI: 10.1021/acs.jpclett.3c00786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/31/2023] [Indexed: 06/07/2023]
Abstract
H2O/D2O negative ion time-of-flight mass spectra from electron transfer processes at different collision energies with neutral potassium yield OH-/OD-, O-, and H-/D-. The branching ratios show a relevant energy dependence with an important isotope effect in D2O. Electronic state spectroscopy of water has been further investigated by recording potassium cation energy loss spectra in the forward scattering direction at an impact energy of 205 eV (lab frame), with quantum chemical calculations for the lowest-lying unoccupied molecular orbitals in the presence of a potassium atom supporting most of the experimental findings. The DO-D bond dissociation energy has been determined for the first time to be 5.41 ± 0.10 eV. The collision dynamics revealed the character of the singly excited (1b2-1) molecular orbital and doubly excited states in such K-H2O and K-D2O collisions.
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Affiliation(s)
- Sarvesh Kumar
- Atomic
and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Masamitsu Hoshino
- Department
of Materials and Life Sciences, Sophia University, Tokyo 102-8554, Japan
| | - Boutheïna Kerkeni
- ISAMM,
Université de la Manouba, La Manouba 2010, Tunisia
- Département
de Physique, LPMC, Faculté des Sciences de Tunis, Université de Tunis el Manar, Tunis 2092, Tunisia
| | - Gustavo García
- Instituto
de Física Fundamental, Consejo Superior de Investigaciones
Científicas (CSIC), Serrano 113-bis, 28006 Madrid, Spain
| | - Paulo Limão-Vieira
- Atomic
and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
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9
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Narayanan S J J, Tripathi D, Verma P, Adhikary A, Dutta AK. Secondary Electron Attachment-Induced Radiation Damage to Genetic Materials. ACS OMEGA 2023; 8:10669-10689. [PMID: 37008102 PMCID: PMC10061531 DOI: 10.1021/acsomega.2c06776] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 02/20/2023] [Indexed: 06/19/2023]
Abstract
Reactions of radiation-produced secondary electrons (SEs) with biomacromolecules (e.g., DNA) are considered one of the primary causes of radiation-induced cell death. In this Review, we summarize the latest developments in the modeling of SE attachment-induced radiation damage. The initial attachment of electrons to genetic materials has traditionally been attributed to the temporary bound or resonance states. Recent studies have, however, indicated an alternative possibility with two steps. First, the dipole-bound states act as a doorway for electron capture. Subsequently, the electron gets transferred to the valence-bound state, in which the electron is localized on the nucleobase. The transfer from the dipole-bound to valence-bound state happens through a mixing of electronic and nuclear degrees of freedom. In the presence of aqueous media, the water-bound states act as the doorway state, which is similar to that of the presolvated electron. Electron transfer from the initial doorway state to the nucleobase-bound state in the presence of bulk aqueous media happens on an ultrafast time scale, and it can account for the decrease in DNA strand breaks in aqueous environments. Analyses of the theoretically obtained results along with experimental data have also been discussed.
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Affiliation(s)
- Jishnu Narayanan S J
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400076, India
| | - Divya Tripathi
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400076, India
| | - Pooja Verma
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400076, India
| | - Amitava Adhikary
- Department
of Chemistry, Oakland University, 146 Library Drive, Rochester, Michigan 48309, United States
| | - Achintya Kumar Dutta
- Department
of Chemistry, Indian Institute of Technology
Bombay, Powai, Mumbai 400076, India
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10
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Verma P, Narayanan S J J, Dutta AK. Electron Attachment to DNA: The Protective Role of Amino Acids. J Phys Chem A 2023; 127:2215-2227. [PMID: 36881498 DOI: 10.1021/acs.jpca.2c06624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
We have studied the effect of amino acids on the electron attachment properties of a DNA nucleobase, with cytosine as a model system. The equation of motion coupled cluster theory with an extended basis set has been used to simulate the electron-attached state of the DNA model system. Arginine, alanine, lysine, and glycine are the four amino acids considered to investigate their role in electron attachment to a DNA nucleobase. The electron attachment to cytosine in all the four cytosine-amino acid gas-phase dimer complexes follows a doorway mechanism, where the electron gets transferred from the initial dipole-bound doorway state to the final nucleobase-bound state through the mixing of electronic and nuclear degrees of freedom. When cytosine is bulk-solvated with glycine, the glycine-bound state acts as the doorway state, where the initial electron density is localized on the bulk amino acid and away from the nucleobase, thus leading to the physical shielding of the nucleobase from the incoming electron. At the same time, the presence of amino acids can increase the stability of the nucleobase-bound anionic state, which can suppress the sugar-phosphate bond rupture caused by dissociative electron attachment to DNA.
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Affiliation(s)
- Pooja Verma
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Jishnu Narayanan S J
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Achintya Kumar Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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11
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Kai T, Toigawa T, Matsuya Y, Hirata Y, Tezuka T, Tsuchida H, Yokoya A. Initial yield of hydrated electron production from water radiolysis based on first-principles calculation. RSC Adv 2023; 13:7076-7086. [PMID: 36875880 PMCID: PMC9977407 DOI: 10.1039/d2ra07274b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/16/2023] [Indexed: 03/05/2023] Open
Abstract
Many scientific insights into water radiolysis have been applied for developing life science, including radiation-induced phenomena, such as DNA damage and mutation induction or carcinogenesis. However, the generation mechanism of free radicals due to radiolysis remains to be fully understood. Consequently, we have encountered a crucial problem in that the initial yields connecting radiation physics to chemistry must be parameterized. We have been challenged in the development of a simulation tool that can unravel the initial free radical yields, from physical interaction by radiation. The presented code enables the first-principles calculation of low energy secondary electrons resulting from the ionization, in which the secondary electron dynamics are simulated while considering dominant collision and polarization effects in water. In this study, using this code, we predicted the yield ratio between ionization and electronic excitation from a delocalization distribution of secondary electrons. The simulation result presented a theoretical initial yield of hydrated electrons. In radiation physics, the initial yield predicted from parameter analysis of radiolysis experiments in radiation chemistry was successfully reproduced. Our simulation code helps realize a reasonable spatiotemporal connection from radiation physics to chemistry, which would contribute to providing new scientific insights for precise understanding of underlying mechanisms of DNA damage induction.
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Affiliation(s)
- Takeshi Kai
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Tomohiro Toigawa
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Yusuke Matsuya
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan.,Faculty of Health Sciences, Hokkaido University Kita-12 Nishi-5, Kita-ku Sapporo Hokkaido 060-0812 Japan
| | - Yuho Hirata
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Tomoya Tezuka
- Department of Nuclear Engineering, Kyoto University Nishikyo-ku Kyoto 615-8530 Japan
| | - Hidetsugu Tsuchida
- Department of Nuclear Engineering, Kyoto University Nishikyo-ku Kyoto 615-8530 Japan.,Quantum Science and Engineering Center, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
| | - Akinari Yokoya
- Institute for Quantum Life Science, National Institutes for Quantum Science and Technology 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
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12
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Wan J, Brož B, Liu Y, Huang SR, Marek A, Tureček F. The DNA Radical Code. Resolution of Identity in Dissociations of Trinucleotide Codon Cation Radicals in the Gas Phase. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023; 34:304-319. [PMID: 36596259 DOI: 10.1021/jasms.2c00322] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Sixty DNA trinucleotide cation radicals covering a large part of the genetic code alphabet were generated by electron transfer in the gas phase, and their chemistry was studied by collision-induced dissociation tandem mass spectrometry and theoretical calculations. The major dissociations involved loss of nucleobase molecules and radicals, backbone cleavage, and cross-ring fragmentations that depended on the nature and position of the nucleobases. Mass identity in dissociations of symmetrical trinucleotide cation radicals of the (XXX+2H)+• and (XYX+2H)+• type was resolved by specific 15N labeling. The specific features of trinucleotide cation radical dissociations involved the dominant formation of d2+ ions, hydrogen atom migrations accompanying the formation of (w2+H)+•, (w2+2H)+, and (d2+2H)+ sequence ions, and cross-ring cleavages in the 3'- and 5'-deoxyribose moieties that depended on the nucleobase type and its position in the ion. Born-Oppenheimer molecular dynamics (BOMD) and density functional theory calculations were used to obtain structures and energies of several cation-radical protomers and conformers for (AAA+2H)+•, (CCC+2H)+•, (GGG+2H)+•, (ACA+2H)+•, and (CAA+2H)+• that were representative of the different types of backbone dissociations. The ion electronic structure, protonation and radical sites, and hydrogen bonding were used to propose reaction mechanisms for the dissociations.
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Affiliation(s)
- Jiahao Wan
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700, United States
| | - Břetislav Brož
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 16610 Prague 6, Czech Republic
| | - Yue Liu
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700, United States
| | - Shu R Huang
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700, United States
| | - Aleš Marek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 16610 Prague 6, Czech Republic
| | - František Tureček
- Department of Chemistry, Bagley Hall, Box 351700, University of Washington, Seattle, Washington 98195-1700, United States
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13
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Das S, Samanta K. Recent Advances in the Study of Negative-Ion Resonances Using Multiconfigurational Propagator and a Complex Absorbing Potential. Chemphyschem 2023; 24:e202200546. [PMID: 36223261 DOI: 10.1002/cphc.202200546] [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: 07/25/2022] [Revised: 10/12/2022] [Indexed: 02/03/2023]
Abstract
The transient resonances are a challenge to bound state quantum mechanics. These states lie in the continuum part of the spectrum of the Hamiltonian. For this, one has to treat a continuum problem due to electron-molecule scattering and the many-electron correlation problem simultaneously. Moreover, the description of a resonance requires a wavefunction that bridges the part that resembles a bound state with another that resembles a continuum state such that the continuity of the wavefunction and its first derivative with respect to the distance between the incoming projectile and the target is maintained. A review of the recent advances in the theoretical investigation of the negative-ion resonances (NIR) is presented. The NIRs are ubiquitous in nature. They result from the scattering of electrons off of an atomic or molecular target. They are important for numerous chemical processes in upper atmosphere, space and even biological systems. A contextual background of the existing theoretical methods as well as the newly-developed multiconfigurational propagator tools based on a complex absorbing potential are discussed.
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Affiliation(s)
- Subhasish Das
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Kansapada, Argul, 752050, India
| | - Kousik Samanta
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Kansapada, Argul, 752050, India
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14
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Hirato M, Onizawa M, Baba Y, Haga Y, Fujii K, Wada SI, Yokoya A. Electronic properties of DNA-related molecules containing a bromine atom. Int J Radiat Biol 2023; 99:82-88. [PMID: 32720858 DOI: 10.1080/09553002.2020.1800121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE To clarify the radiosensitization mechanism masking the Auger effect of the cells possessing brominated DNA, the electronic properties of DNA-related molecules containing Br were investigated by X-ray spectroscopy and specific heat measurement. MATERIALS AND METHODS X-ray absorption near-edge structure (XANES) and X-ray photoemission spectroscopy (XPS) were used to measure the electronic properties of the nucleotides with and without Br. We determined the specific heat of 5-bromouracil crystals with thymine as a reference molecule at low temperatures of 3-48 K to calculate the microscopic state numbers. RESULTS Obtained XANES and XPS spectra indicated that both the lowest unoccupied molecular orbital (LUMO) and the core-levels were not affected by the Br incorporation. The state numbers of 5-bromouracil calculated from the specific heats obtained around 25 K was about 1.5 times larger than that for thymine below 20 K, although the numbers were almost the same below 5 K. DISCUSSION Our results suggest that the Br atom may not contribute substantially to the LUMO and core-level electronic states of the molecule, but rather to the microscopic states related to the excitation of lattice vibrations, which may be involved in valence electronic states.
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Affiliation(s)
- Misaki Hirato
- Graduate School of Science and Engineering, Ibaraki University, Mito, Ibaraki, Japan.,Institute for Quantum Life Science, National Institutes of Quantum and Radiological Sciences and Technology, Tokai, Ibaraki, Japan
| | - Misato Onizawa
- Graduate School of Science and Engineering, Ibaraki University, Mito, Ibaraki, Japan.,Institute for Quantum Life Science, National Institutes of Quantum and Radiological Sciences and Technology, Tokai, Ibaraki, Japan
| | - Yuji Baba
- Institute for Quantum Life Science, National Institutes of Quantum and Radiological Sciences and Technology, Tokai, Ibaraki, Japan.,Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki, Japan
| | - Yoshinori Haga
- Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki, Japan
| | - Kentaro Fujii
- Institute for Quantum Life Science, National Institutes of Quantum and Radiological Sciences and Technology, Tokai, Ibaraki, Japan
| | - Shin-Ichi Wada
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan.,Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - Akinari Yokoya
- Graduate School of Science and Engineering, Ibaraki University, Mito, Ibaraki, Japan.,Institute for Quantum Life Science, National Institutes of Quantum and Radiological Sciences and Technology, Tokai, Ibaraki, Japan
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15
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Effects of substituent and excess electron attachment on proton transfer between the radiosensitizer base pairs in aqueous solution. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Estimation of biological effect of Cu-64 radiopharmaceuticals with Geant4-DNA simulation. Sci Rep 2022; 12:8957. [PMID: 35624130 PMCID: PMC9142517 DOI: 10.1038/s41598-022-13096-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 05/05/2022] [Indexed: 11/24/2022] Open
Abstract
The aim of this work is to estimate the biological effect of targeted radionuclide therapy using Cu-64, which is a well-known Auger electron emitter. To do so, we evaluate the absorbed dose of emitted particles from Cu-64 using the Geant4-DNA Monte Carlo simulation toolkit. The contribution of beta particles to the absorbed dose is higher than that of Auger electrons. The simulation result agrees with experimental ones evaluated using coumarin-3-carboxylic acid chemical dosimeter. The simulation result is also in good agreement with previous ones obtained using fluorescent nuclear track detector. From the results of present simulation (i.e., absorbed dose estimation) and previous biological experiments using two cell lines (i.e., evaluation of survival curves), we have estimated the relative biological effectiveness (RBE) of Cu-64 emitted particles on CHO wild-type cells and xrs5 cells. The RBE of xrs5 cells exposed to Cu-64 is almost equivalent to that with gamma rays and protons and C ions. This result indicates that the radiosensitivity of xrs5 cells is independent of LET. In comparison to this, the RBE on CHO wild-type cells exposed to Cu-64 is significantly higher than gamma rays and almost equivalent to that irradiated with C ions with a linear energy transfer of 70 keV/μm.
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17
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Cui X, Zhao Y, Zhang C, Meng Q. Nitro rotation tuned dissociative electron attachment upon targeted radiosensitizer 4-substituted Z bases. Phys Chem Chem Phys 2022; 24:10356-10364. [PMID: 35438101 DOI: 10.1039/d2cp00351a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, a set of new potential radiation sensitizers (4-substituted Z-bases: 4XZ, X = F, Cl, Br, and I) are designed based on the artificial 6-amino-5-nitro-3-(1'-β-D-2'-deoxyribofuranosyl)-2(1H)-pyridone (Z), which can selectively bind to breast cancer cells. The calculated electron affinities in water solution show that the halogenated Z-bases are efficient electron acceptors which possess significant electron-withdrawing characters following the order of 4XZ > Z ≫ U. To ensure the effective electron attachment induced dissociation, we constructed the energy profiles related to the X-C bond cleavage of neutral and anionic bases. The results show that the X-C bond becomes relatively weak after the electron attachment. In particular, the electron induced dehalogenations of (4BrZ)- and (4IZ)- are low-barrier and exothermic, which support a high radiosensitivity. Furthermore, we characterized the vibrational excitation effect on the dissociative electron attachment, which demonstrates that the charge distribution can be regulated by the rotation-induced structural distortion accompanied by the electron localization on the nitro group. Also examined is the influence of base pairing on the dehalogenation, which is not only conducive to the electron-driven dissociation but is also beneficial to the stabilization of related products. The current study suggests 4BrZ and 4IZ can be regarded as potential targeted radiosensitizers with possible applications in reducing the side effects in radiotherapy.
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Affiliation(s)
- Xixi Cui
- College of Physics and Electronics, Shandong Normal University, Jinan 250358, Shandong, China.
| | - Yu Zhao
- College of Physics and Electronics, Shandong Normal University, Jinan 250358, Shandong, China.
| | - Changzhe Zhang
- College of Physics and Electronics, Shandong Normal University, Jinan 250358, Shandong, China.
| | - Qingtian Meng
- College of Physics and Electronics, Shandong Normal University, Jinan 250358, Shandong, China.
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18
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Gadeyne T, Zhang P, Schild A, Wörner HJ. Low-energy electron distributions from the photoionization of liquid water: a sensitive test of electron mean-free paths. Chem Sci 2022; 13:1675-1692. [PMID: 35282614 PMCID: PMC8826766 DOI: 10.1039/d1sc06741a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 01/06/2022] [Indexed: 11/21/2022] Open
Abstract
The availability of accurate mean free paths for slow electrons (<50 eV) in water is central to the understanding of many electron-driven processes in aqueous solutions, but their determination poses major challenges to experiment and theory alike. Here, we describe a joint experimental and theoretical study demonstrating a novel approach for testing, and, in the future, refining such mean free paths. We report the development of Monte-Carlo electron-trajectory simulations including elastic and inelastic electron scattering, as well as energy loss and secondary-electron production to predict complete photoelectron spectra of liquid water. These simulations are compared to a new set of photoelectron spectra of a liquid-water microjet recorded over a broad range of photon energies in the extreme ultraviolet (20–57 eV). Several previously published sets of scattering parameters are investigated, providing direct and intuitive insights on how they influence the shape of the low-energy electron spectra. A pronounced sensitivity to the escape barrier is also demonstrated. These simulations considerably advance our understanding of the origin of the prominent low-energy electron distributions in photoelectron spectra of liquid water and clarify the influence of scattering parameters and the escape barrier on their shape. They moreover describe the reshaping and displacement of low-energy photoelectron bands caused by vibrationally inelastic scattering. Our work provides a quantitative basis for the interpretation of the complete photoelectron spectra of liquids and opens the path to fully predictive simulations of low-energy scattering in liquid water. Our study reveals the detailed influence of elastic and inelastic mean-free paths on the complete photoelectron spectra of liquid water, including the low-energy electron distributions and the reshaping of the primary photoelectron bands.![]()
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Affiliation(s)
- Titouan Gadeyne
- Laboratory for Physical Chemistry, ETH Zürich Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
- Département de Chimie, École Normale Supérieure, PSL University 75005 Paris France
| | - Pengju Zhang
- Laboratory for Physical Chemistry, ETH Zürich Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Axel Schild
- Laboratory for Physical Chemistry, ETH Zürich Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Hans Jakob Wörner
- Laboratory for Physical Chemistry, ETH Zürich Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
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19
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Narayanan S J J, Tripathi D, Dutta AK. Doorway Mechanism for Electron Attachment Induced DNA Strand Breaks. J Phys Chem Lett 2021; 12:10380-10387. [PMID: 34669407 DOI: 10.1021/acs.jpclett.1c02735] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We report a new doorway mechanism for the dissociative electron attachment to genetic materials. The dipole-bound state of the nucleotide anion acts as the doorway for electron capture in the genetic material. The electron gets subsequently transferred to a dissociative σ*-type anionic state localized on a sugar-phosphate or a sugar-nucleobase bond, leading to their cleavage. The electron transfer is mediated by the mixing of electronic and nuclear degrees of freedom. The cleavage rate of the sugar-phosphate bond predicted by this new mechanism is higher than that of the sugar-nucleobase bond breaking, and both processes are considerably slower than the formation of a stable valence-bound anion. The new mechanism can explain the relative rates of electron attachment induced bond cleavages in genetic materials.
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Affiliation(s)
- Jishnu Narayanan S J
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Divya Tripathi
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Achintya Kumar Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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20
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Ma J, Bahry T, Denisov SA, Adhikary A, Mostafavi M. Quasi-Free Electron-Mediated Radiation Sensitization by C5-Halopyrimidines. J Phys Chem A 2021; 125:7967-7975. [PMID: 34470211 PMCID: PMC8448956 DOI: 10.1021/acs.jpca.1c05974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Substitution of the thymidine moiety in DNA by C5-substituted halogenated thymidine analogues causes significant augmentation of radiation damage in living cells. However, the molecular pathway involved in such radiosensitization process has not been clearly elucidated to date in solution at room temperature. So far, low-energy electrons (LEEs; 0-20 eV) under vacuum condition and solvated electrons (esol-) in solution are shown to produce the σ-type C5-centered pyrimidine base radical through dissociative electron attachment involving carbon-halogen bond breakage. Formation of this σ-type radical and its subsequent reactions are proposed to cause cellular radiosensitization. Here, we report time-resolved measurements at room temperature, showing that a radiation-produced quasi-free electron (eqf-) in solution promptly breaks the C5-halogen bond in halopyrimidines forming the σ-type C5 radical via an excited transient anion radical. These results demonstrate the importance of ultrafast reactions of eqf-, which are extremely important in chemistry, physics, and biology, including tumor radiochemotherapy.
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Affiliation(s)
- Jun Ma
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, P. R. China
| | - Teseer Bahry
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, P. R. China
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay; 91405, Orsay, Cedex, France
| | - Sergey A. Denisov
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay; 91405, Orsay, Cedex, France
| | - Amitava Adhikary
- Department of Chemistry, Oakland University, 146 Library Drive, Rochester, MI - 48309, United States
| | - Mehran Mostafavi
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay; 91405, Orsay, Cedex, France
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21
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Sedmidubská B, Luxford TFM, Kočišek J. Electron attachment to isolated and microhydrated favipiravir. Phys Chem Chem Phys 2021; 23:21501-21511. [PMID: 34382983 DOI: 10.1039/d1cp02686k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Electron attachment and its equivalent in complex environments, single-electron reduction, are important in many biological processes. Here, we experimentally study the electron attachment to favipiravir, a well-known antiviral agent. Electron attachment spectroscopy is used to explore the energetics of associative (AEA) and dissociative (DEA) electron attachment to isolated favipiravir. AEA dominates the interaction and the yields of the fragment anions after DEA are an order of magnitude lower than that of the parent anion. DEA primary proceeds via decomposition of the CONH2 functional group, which is supported by reaction threshold calculations using ab initio methods. Mass spectrometry of small favipiravir-water clusters demonstrates that a lot of energy is transferred to the solvent upon electron attachment. The energy gained upon electron attachment, and the high stability of the parent anion were previously suggested as important properties for the action of several electron-affinic radiosensitizers. If any of these mechanisms cause synergism in chemo-radiation therapy, favipiravir could be repurposed as a radiosensitizer.
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Affiliation(s)
- Barbora Sedmidubská
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic. and Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Břehová 7, 11519 Prague, Czech Republic
| | - Thomas F M Luxford
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Jaroslav Kočišek
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
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22
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Kulbir, Das S, Devi T, Goswami M, Yenuganti M, Bhardwaj P, Ghosh S, Chandra Sahoo S, Kumar P. Oxygen atom transfer promoted nitrate to nitric oxide transformation: a step-wise reduction of nitrate → nitrite → nitric oxide. Chem Sci 2021; 12:10605-10612. [PMID: 35003574 PMCID: PMC8666158 DOI: 10.1039/d1sc00803j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/01/2021] [Indexed: 12/22/2022] Open
Abstract
Nitrate reductases (NRs) are molybdoenzymes that reduce nitrate (NO3−) to nitrite (NO2−) in both mammals and plants. In mammals, the salival microbes take part in the generation of the NO2− from NO3−, which further produces nitric oxide (NO) either in acid-induced NO2− reduction or in the presence of nitrite reductases (NiRs). Here, we report a new approach of VCl3 (V3+ ion source) induced step-wise reduction of NO3− in a CoII-nitrato complex, [(12-TMC)CoII(NO3−)]+ (2,{CoII–NO3−}), to a CoIII–nitrosyl complex, [(12-TMC)CoIII(NO)]2+ (4,{CoNO}8), bearing an N-tetramethylated cyclam (TMC) ligand. The VCl3 inspired reduction of NO3− to NO is believed to occur in two consecutive oxygen atom transfer (OAT) reactions, i.e., OAT-1 = NO3− → NO2− (r1) and OAT-2 = NO2− → NO (r2). In these OAT reactions, VCl3 functions as an O-atom abstracting species, and the reaction of 2 with VCl3 produces a CoIII-nitrosyl ({CoNO}8) with VV-Oxo ({VV
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O}3+) species, via a proposed CoII-nitrito (3, {CoII–NO2−}) intermediate species. Further, in a separate experiment, we explored the reaction of isolated complex 3 with VCl3, which showed the generation of 4 with VV-Oxo, validating our proposed reaction sequences of OAT reactions. We ensured and characterized 3 using VCl3 as a limiting reagent, as the second-order rate constant of OAT-2 (k2/) is found to be ∼1420 times faster than that of the OAT-1 (k2) reaction. Binding constant (Kb) calculations also support our proposition of NO3− to NO transformation in two successive OAT reactions, as Kb(CoII–NO2−) is higher than Kb(CoII–NO3−), hence the reaction moves in the forward direction (OAT-1). However, Kb(CoII–NO2−) is comparable to Kb{CoNO}8, and therefore sequenced the second OAT reaction (OAT-2). Mechanistic investigations of these reactions using 15N-labeled-15NO3− and 15NO2− revealed that the N-atom in the {CoNO}8 is derived from NO3− ligand. This work highlights the first-ever report of VCl3 induced step-wise NO3− reduction (NRs activity) followed by the OAT induced NO2− reduction and then the generation of Co-nitrosyl species {CoNO}8. Single metal-induced reduction of NO3− → {NO2−} → NO via oxygen atom transfer reaction.![]()
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Affiliation(s)
- Kulbir
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
| | - Sandip Das
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
| | - Tarali Devi
- Humboldt-Universität zu Berlin, Institut für Chemie Brook-Taylor-Straße 2 D-12489 Berlin Germany
| | - Mrigaraj Goswami
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
| | - Mahesh Yenuganti
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
| | - Prabhakar Bhardwaj
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
| | - Somnath Ghosh
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
| | | | - Pankaj Kumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
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23
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Anstöter CS, DelloStritto M, Klein ML, Matsika S. Modeling the Ultrafast Electron Attachment Dynamics of Solvated Uracil. J Phys Chem A 2021; 125:6995-7003. [PMID: 34347484 DOI: 10.1021/acs.jpca.1c05288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electron attachment to DNA by low energy electrons can lead to DNA damage, so a fundamental understanding of how electrons interact with the components of nucleic acids in solution is an open challenge. In solution, low energy electrons can generate presolvated electrons, epre-, which are efficiently scavanged by pyrimidine nucleobases to form transient negative ions, able to relax to either stable valence bound anions or undergo dissociative electron detachment or transfer to other parts of DNA/RNA leading to strand breakages. In order to understand the initial electron attachment dynamics, this paper presents a joint molecular dynamics and high-level electronic structure study into the behavior of the electronic states of the solvated uracil anion. Both the valence π* and nonvalence epre- states of the solvated uracil system are studied, and the effect of the solvent environment and the geometric structure of the uracil core are uncoupled to gain insight into the physical origin of the stabilization of the solvated uracil anion. Solvent reorganization is found to play a dominant role followed by relaxation of the uracil core.
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Affiliation(s)
- Cate S Anstöter
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Mark DelloStritto
- Institute for Computational Molecular Science, Temple University SERC, Philadelphia, Pennsylvania 19122, United States
| | - Michael L Klein
- Institute for Computational Molecular Science, Temple University SERC, Philadelphia, Pennsylvania 19122, United States
| | - Spiridoula Matsika
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
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Pshenichnyuk SA, Modelli A. Electron Attachment to Isolated Molecules as a Probe to Understand Mitochondrial Reductive Processes. Methods Mol Biol 2021; 2277:101-124. [PMID: 34080147 DOI: 10.1007/978-1-0716-1270-5_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This chapter describes the complementary experimental techniques Electron Transmission Spectroscopy and Dissociative Electron Attachment Spectroscopy, two of the most suitable means for investigating interactions between electrons and gas-phase molecules, resonance formation of temporary molecular negative ions, and their possible decay through the dissociative electron attachment (DEA) mechanism. The latter can be seen as the gas-phase counterpart of the transfer of a solvated electron in solution, accompanied by dissociation of the molecular anion, referred to as dissociative electron transfer (DET). DET takes place in vivo under reductive conditions, for instance, in the intermembrane space of mitochondria under interaction of xenobiotic molecules possessing high electron affinity with electrons "leaked" from the mitochondrial respiratory chain. A likely mechanism of the toxic activity of dichlorodiphenyltrichloroethane based on its DEA properties is briefly outlined, and compared with the well-established harmful effects of the model toxicant carbon tetrachloride ascribed to reductive dechlorination in a cellular ambient. A possible mechanism of the antioxidant activity of polyphenolic compounds present near the main site of superoxide anion production in mitochondria is also briefly discussed.
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Affiliation(s)
- Stanislav A Pshenichnyuk
- Institute of Molecule and Crystal Physics, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa, Russia.
| | - Alberto Modelli
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, Bologna, Italy
- Centro Interdipartimentale di Ricerca in Scienze Ambientali, Ravenna, Italy
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25
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Bahry T, Denisov SA, Moisy P, Ma J, Mostafavi M. Real-Time Observation of Solvation Dynamics of Electron in Actinide Extraction Binary Solutions of Water and n-Tributyl Phosphate. J Phys Chem B 2021; 125:3843-3849. [PMID: 33650867 DOI: 10.1021/acs.jpcb.0c10831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The excess electron in solution is a highly reactive radical involved in various radiation-induced reactions. Its solvation state critically determines the subsequent pathway and rate of transfer. For instance, water plays a dominating role in the electron-induced dealkylation of n-tributyl phosphate in actinide extraction processing. However, the underlying electron solvation processes in such systems are lacking. Herein, we directly observed the solvation dynamics of electrons in H-bonded water and n-tributyl phosphate (TBP) binary solutions with a mole fraction of water (Xw) varying from 0.05 to 0.51 under ambient conditions. Following the evolution of the absorption spectrum of trapped electrons (not fully solvated) with picosecond resolution, we show that electrons statistically distributed would undergo preferential solvation within water molecules extracted in TBP. We determine the time scale of excess electron full solvation from the deconvoluted transient absorption-kinetical data. The process of solvent reorganization accelerates by increasing the water molar fraction, and the rate of this process is 2 orders of magnitude slower compared to bulk water. We assigned the solvation process to hydrogen network reorientation induced by a negative charge of the excess electron that strongly depends on the local water environment. Our findings suggest that water significantly stabilizes the electron in a deeper potential than the pure TBP case. In its new state, the electron is likely to inhibit the dealkylation of extractants in actinide separation.
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Affiliation(s)
- Teseer Bahry
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, P. R. China.,Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay 91405, Orsay, Cedex France
| | - Sergey A Denisov
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay 91405, Orsay, Cedex France
| | - Philippe Moisy
- CEA, DES/ISEC/DMRC, Univ. Montpellier, 34090 Marcoule, France
| | - Jun Ma
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, P. R. China
| | - Mehran Mostafavi
- Institut de Chimie Physique, UMR 8000 CNRS, Bât. 349, Université Paris-Saclay 91405, Orsay, Cedex France
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26
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Malerz S, Trinter F, Hergenhahn U, Ghrist A, Ali H, Nicolas C, Saak CM, Richter C, Hartweg S, Nahon L, Lee C, Goy C, Neumark DM, Meijer G, Wilkinson I, Winter B, Thürmer S. Low-energy constraints on photoelectron spectra measured from liquid water and aqueous solutions. Phys Chem Chem Phys 2021; 23:8246-8260. [PMID: 33710216 DOI: 10.1039/d1cp00430a] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on the effects of electron collision and indirect ionization processes, occurring at photoexcitation and electron kinetic energies well below 30 eV, on the photoemission spectra of liquid water. We show that the nascent photoelectron spectrum and, hence, the inferred electron binding energy can only be accurately determined if electron energies are large enough that cross sections for quasi-elastic scattering processes, such as vibrational excitation, are negligible. Otherwise, quasi-elastic scattering leads to strong, down-to-few-meV kinetic energy scattering losses from the direct photoelectron features, which manifest in severely distorted intrinsic photoelectron peak shapes. The associated cross-over point from predominant (known) electronically inelastic to quasi-elastic scattering seems to arise at surprisingly large electron kinetic energies, of approximately 10-14 eV. Concomitantly, we present evidence for the onset of indirect, autoionization phenomena (occurring via superexcited states) within a few eV of the primary and secondary ionization thresholds. These processes are inferred to compete with the direct ionization channels and primarily produce low-energy photoelectrons at photon and electron impact excitation energies below ∼15 eV. Our results highlight that vibrational inelastic electron scattering processes and neutral photoexcitation and autoionization channels become increasingly important when photon and electron kinetic energies are decreased towards the ionization threshold. Correspondingly, we show that for neat water and aqueous solutions, great care must be taken when quantitatively analyzing photoelectron spectra measured too close to the ionization threshold. Such care is essential for the accurate determination of solvent and solute ionization energies as well as photoelectron branching ratios and peak magnitudes.
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Affiliation(s)
- Sebastian Malerz
- Molecular Physics Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
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27
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Meißner R, Feketeová L, Bayer A, Limão-Vieira P, Denifl S. Formation of negative and positive ions in the radiosensitizer nimorazole upon low-energy electron collisions. J Chem Phys 2021; 154:074306. [PMID: 33607883 DOI: 10.1063/5.0040045] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A comprehensive investigation of low-energy electron attachment and electron ionization of the nimorazole radiosensitizer used in cancer radiation therapy is reported by means of a gas-phase crossed beam experiment in an electron energy range from 0 eV to 70 eV. Regarding negative ion formation, we discuss the formation of fifteen fragment anions in the electron energy range of 0 eV-10 eV, where the most intense signal is assigned to the nitrogen dioxide anion NO2 -. The other fragment anions have been assigned to form predominantly from a common temporary negative ion state close to 3 eV of the nitroimidazole moiety, while the morpholine moiety seems to act only as a spectator in the dissociative electron attachment event to nimorazole. Quantum chemical calculations have been performed to help interpreting the experimental data with thermochemical thresholds, electron affinities, and geometries of some of the neutral molecules. As far as positive ion formation is concerned, the mass spectrum at the electron energy of 70 eV shows a weakly abundant parent ion and C5H10NO+ as the most abundant fragment cation. We report appearance energy (AE) measurements for six cations. For the intact nimorazole molecular cation, the AE of 8.16 ± 0.05 eV was obtained, which is near the presently calculated adiabatic ionization energy.
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Affiliation(s)
- R Meißner
- Institute for Ion Physics and Applied Physics and Center for Biomolecular Sciences (CMBI), University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - L Feketeová
- Institute for Ion Physics and Applied Physics and Center for Biomolecular Sciences (CMBI), University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - A Bayer
- Institute for Ion Physics and Applied Physics and Center for Biomolecular Sciences (CMBI), University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - P Limão-Vieira
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - S Denifl
- Institute for Ion Physics and Applied Physics and Center for Biomolecular Sciences (CMBI), University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
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28
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Gao L, Zhang L, Fu Q, Bu Y. Molecular Dynamics Characterization of Dielectron Hydration in Liquid Water with Unique Double Proton Transfers. J Chem Theory Comput 2021; 17:666-677. [PMID: 33474934 DOI: 10.1021/acs.jctc.0c01123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Radiation chemistry of water and aqueous solutions has always been an interesting scientific issue owing to involving electronic excitations, ionization of solvated species, and formation of radiolytic species and many elementary reactions, but the underlying mechanisms are still poorly understood. Here, we for the first time molecular dynamics characterize the hydration dynamics of two correlated electrons and their triggered unique phenomena in liquid water associated with radiolysis of water using the combined hybrid functional and nonlocal dispersion functional. Hydration of two electrons may experience two distinctly different mechanisms, one forming a spin-paired closed-shell unicaged dielectron hydrate (e22-aq) and the other forming a spin-paired metastable open-shell bicaged hydrated electron pair (e-aq···e-aq) which exhibits intriguing antiferromagnetic spin coupling dynamics (in a range of -40 cm-1 to -500 cm-1). e-aq···e-aq can recombine to e22-aq through a unique solvent fluctuation-controlled gradual-flowing mechanism, and enlarging fluctuation can promote the conversion. Interestingly, we directly observe that e22-aq as the precursor can trigger hydrogen evolution via unique continuous spontaneous double proton transfer to the dielectron with a short-lived H-aq intermediate, but e-aq···e-aq does not directly. This is the first direct observation for the connection between e22-aq and spontaneous hydrogen evolution including participation of H-aq in aqueous solution, bridging relevant experimental phenomena. This work also evidences an unnoticed process, the double proton transfer mediated charge separation, and presents the first detailed analysis regarding the evolution dynamics of e22-aq for the understanding of the radiolysis reactions in aqueous solutions.
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Affiliation(s)
- Liang Gao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Liang Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Qiang Fu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
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29
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New combination chemotherapy of cisplatin with an electron-donating compound for treatment of multiple cancers. Sci Rep 2021; 11:788. [PMID: 33436996 PMCID: PMC7804005 DOI: 10.1038/s41598-020-80876-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 12/29/2020] [Indexed: 02/08/2023] Open
Abstract
Cisplatin is the first and most widely used platinum-based chemotherapy drug and is the cornerstone agent in treating a broad spectrum of cancers. However, its clinical application is often limited by severe toxic side effects and drug resistance. Based on the discovered dissociative electron transfer mechanism of cisplatin, a novel combination of cisplatin with [9-(2-carboxyphenyl)-6-diethylamino-3-xanthenylidene]-diethylammonium chloride (basic violet 10, BV10) is proposed to potentiate the chemotherapeutic effect of cisplatin. Here, we show that this combination enhances the anti-cancer effect of cisplatin in both in vitro cell lines and in vivo xenograft mouse models of cisplatin-sensitive and -resistant lung, ovarian and cervical cancers while introducing minimal additional toxic side effects. Furthermore, femtosecond time-resolved laser spectroscopic measurements demonstrate that cisplatin reacts with BV10 via an electron transfer mechanism. These results indicate that the combination of cisplatin with BV10 is promising for improving the chemotherapy of cancers with various extents of cisplatin resistance.
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30
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Luxford TFM, Pshenichnyuk SA, Asfandiarov NL, Perečko T, Falk M, Kočišek J. 5-Nitro-2,4-Dichloropyrimidine as an Universal Model for Low-Energy Electron Processes Relevant for Radiosensitization. Int J Mol Sci 2020; 21:ijms21218173. [PMID: 33142925 PMCID: PMC7662275 DOI: 10.3390/ijms21218173] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/27/2020] [Accepted: 10/27/2020] [Indexed: 01/18/2023] Open
Abstract
We report experimental results of low-energy electron interactions with.
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Affiliation(s)
- Thomas F. M. Luxford
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic;
| | - Stanislav A. Pshenichnyuk
- Institute of Molecule and Crystal Physics UFRC RAS, October Avenue 151, 450075 Ufa, Russia;
- Correspondence: (S.A.P.); (M.F.); (J.K.)
| | - Nail L. Asfandiarov
- Institute of Molecule and Crystal Physics UFRC RAS, October Avenue 151, 450075 Ufa, Russia;
| | - Tomáš Perečko
- Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, 612 65 Brno, Czech Republic;
| | - Martin Falk
- Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, 612 65 Brno, Czech Republic;
- Correspondence: (S.A.P.); (M.F.); (J.K.)
| | - Jaroslav Kočišek
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic;
- Correspondence: (S.A.P.); (M.F.); (J.K.)
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31
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Yang S, Zhang Y, Zhao X. Change of Initial Yield of a Hydrated Electron with Uridine Monophosphate Concentration Is Related to the Excitation Photon Energy in Transient Absorption Spectroscopy. J Phys Chem B 2020; 124:3695-3700. [PMID: 32310667 DOI: 10.1021/acs.jpcb.9b10816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The initial yield of a hydrated electron (eaq-) in a solution under laser pulse irradiation was investigated by pump-probe transient absorption spectroscopy. The initial quantum yield of eaq- varies with the concentration of uridine monophosphate (UMP). The variation of the concentration of eaq- is often used to study the prehydrated electron (epre-) and eaq- attachment to UMP. The results of 320 and 260 nm excitations were compared. It was found that with the increase of UMP concentration, the initial yield of eaq- increases at 320 nm excitation, but decreases at 260 nm excitation. The further analysis indicates that some of the epre- attachments to UMP before solvation at 260 nm excitation result in the decrease of the eaq- yield. In addition, the absorption of UMP to 260 nm also causes the decrease of the eaq- yield. After the excitation at 320 nm, the phosphate group of UMP can release electrons more easily than that of water molecules by two-photon absorption, and therefore the eaq- yield increases. With the increase of UMP concentration, the decay rate of eaq- increases because eaq- is captured by UMP. The change of excitation photon does not affect the reaction rate of eaq- attachment to UMP. The longer lifetime of eaq- obtained at 260 nm excitation than 320 nm excitation is induced by the larger eaq- escape probability at 260 nm excitation. Our results show that the femtosecond pulse pump-probe transient absorption spectroscopy method should be cautiously used because of its complexity in studying the epre- attachment to nucleotides in an aqueous solution.
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Affiliation(s)
- Songqiu Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian 116023, China
| | - Yan Zhang
- Institute of Molecular Sciences and Engineering, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Xi Zhao
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian 116023, China
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32
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Schild A, Peper M, Perry C, Rattenbacher D, Wörner HJ. Alternative Approach for the Determination of Mean Free Paths of Electron Scattering in Liquid Water Based on Experimental Data. J Phys Chem Lett 2020; 11:1128-1134. [PMID: 31928019 DOI: 10.1021/acs.jpclett.9b02910] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Mean free paths of low-energy electrons in liquid water are of importance for modeling many physicochemical processes, but neither theoretical predictions nor experimental results have converged for these parameters. We therefore introduce an approach to determine elastic and inelastic mean free paths (EMFP, IMFP) based on experimental data. We show that ab initio calculations of electron scattering with water clusters converge with cluster size, thus providing access to condensed-phase scattering. The results are used in Monte Carlo simulations to extract EMFP and IMFP from recent liquid-microjet experiments that determined the effective attenuation length (EAL) and the photoelectron angular distribution (PAD) following oxygen 1s-ionization of liquid water. For electron kinetic energies from 10 to 300 eV, we find that the IMFP is noticeably larger than the EAL. The EMFP is longer than that of gas-phase water and the IMFP is longer compared to latest theoretical estimations, but both EMFP and IMFP are much shorter than suggested by experimental measurements of integral cross sections for amorphous ice.
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Affiliation(s)
- Axel Schild
- ETH Zürich, Laboratorium für Physikalische Chemie , 8093 Zürich , Switzerland
| | - Michael Peper
- ETH Zürich, Laboratorium für Physikalische Chemie , 8093 Zürich , Switzerland
| | - Conaill Perry
- ETH Zürich, Laboratorium für Physikalische Chemie , 8093 Zürich , Switzerland
| | - Dominik Rattenbacher
- ETH Zürich, Laboratorium für Physikalische Chemie , 8093 Zürich , Switzerland
- Max Planck Institute for the Science of Light , Staudtstrasse 2 , 91058 Erlangen , Germany
| | - Hans Jakob Wörner
- ETH Zürich, Laboratorium für Physikalische Chemie , 8093 Zürich , Switzerland
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33
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Biswas PK, Chakraborty S. Targeted DNA oxidation and trajectory of radical DNA using DFT based QM/MM dynamics. Nucleic Acids Res 2019; 47:2757-2765. [PMID: 30773597 PMCID: PMC6451130 DOI: 10.1093/nar/gkz089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/27/2019] [Accepted: 02/04/2019] [Indexed: 01/06/2023] Open
Abstract
Molecular insight into electronic rearrangements and structural trajectories arising from oxidative damages to DNA backbone is of crucial importance in understanding the effect of ionizing radiation, developing DNA biosensors and designing effective DNA cleaving molecules. Employing a Density Functional Theory based multi-scale Quantum-Mechanical-Molecular-Mechanical (QM/MM) simulation and a suitable partitioning of the Hamiltonian on solvated nucleotide, and single-, and double-stranded DNA, we mimic hydrogen transfer reactions from the backbone by OH radicals and report structural trajectories arising from on-the-fly electronic charge- and spin-density redistribution in these three different structural topologies of DNA. Trajectories reveal that H4′ abstraction can disrupt the deoxyribose moiety through the formation of C4′=O4′ ketone and a π-bond with base at C1′-N9 in a nucleotide versus only partial ketone formation in single- and double-stranded DNA, where the orientation of the base is topologically restrained. However, H5′ abstraction can lead DNA cleavage at 5′ end through the formation of C5′=O5′ ketone and breakage of P-O5′ bond. Results demonstrate that structural damages from oxidative reactions are restrained by base stacking and base-pair hydrogen bonding. The methodology can be suitably used to study targeted DNA and RNA damages from radicals and radiomimetic drugs to design DNA cleaving molecules for chemotherapy.
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Affiliation(s)
- Pradip K Biswas
- Laboratory of Computational Biophysics and Bioengineering, Department of Physics, Tougaloo College, Tougaloo, MS 39174, USA
| | - Sandipan Chakraborty
- Laboratory of Computational Biophysics and Bioengineering, Department of Physics, Tougaloo College, Tougaloo, MS 39174, USA
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34
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The Role of Electron Transfer in the Fragmentation of Phenyl and Cyclohexyl Boronic Acids. Int J Mol Sci 2019; 20:ijms20225578. [PMID: 31717298 PMCID: PMC6888488 DOI: 10.3390/ijms20225578] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/05/2019] [Accepted: 11/06/2019] [Indexed: 11/17/2022] Open
Abstract
In this study, novel measurements of negative ion formation in neutral potassium-neutral boronic acid collisions are reported in electron transfer experiments. The fragmentation pattern of phenylboronic acid is comprehensively investigated for a wide range of collision energies, i.e., from 10 to 1000 eV in the laboratory frame, allowing some of the most relevant dissociation channels to be probed. These studies were performed in a crossed molecular beam set up using a potassium atom as an electron donor. The negative ions formed in the collision region were mass analysed with a reflectron time-of-flight mass spectrometer. In the unimolecular decomposition of the temporary negative ion, the two most relevant yields were assigned to BO- and BO2-. Moreover, the collision-induced reaction was shown to be selective, i.e., at energies below 100 eV, it mostly formed BO-, while at energies above 100 eV, it mostly formed BO2-. In order to further our knowledge on the complex internal reaction mechanisms underlying the influence of the hybridization state of the boron atom, cyclohexylboronic acid was also investigated in the same collision energy range, where the main dissociation channel yielded BO2-. The experimental results for phenyl boronic acid are supported by ab initio theoretical calculations of the lowest unoccupied molecular orbitals (LUMOs) accessed in the collision process.
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35
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Ma J, Denisov SA, Adhikary A, Mostafavi M. Ultrafast Processes Occurring in Radiolysis of Highly Concentrated Solutions of Nucleosides/Tides. Int J Mol Sci 2019; 20:ijms20194963. [PMID: 31597345 PMCID: PMC6801490 DOI: 10.3390/ijms20194963] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 12/18/2022] Open
Abstract
Among the radicals (hydroxyl radical (•OH), hydrogen atom (H•), and solvated electron (esol−)) that are generated via water radiolysis, •OH has been shown to be the main transient species responsible for radiation damage to DNA via the indirect effect. Reactions of these radicals with DNA-model systems (bases, nucleosides, nucleotides, polynucleotides of defined sequences, single stranded (ss) and double stranded (ds) highly polymeric DNA, nucleohistones) were extensively investigated. The timescale of the reactions of these radicals with DNA-models range from nanoseconds (ns) to microseconds (µs) at ambient temperature and are controlled by diffusion or activation. However, those studies carried out in dilute solutions that model radiation damage to DNA via indirect action do not turn out to be valid in dense biological medium, where solute and water molecules are in close contact (e.g., in cellular environment). In that case, the initial species formed from water radiolysis are two radicals that are ultrashort-lived and charged: the water cation radical (H2O•+) and prethermalized electron. These species are captured by target biomolecules (e.g., DNA, proteins, etc.) in competition with their inherent pathways of proton transfer and relaxation occurring in less than 1 picosecond. In addition, the direct-type effects of radiation, i.e., ionization of macromolecule plus excitations proximate to ionizations, become important. The holes (i.e., unpaired spin or cation radical sites) created by ionization undergo fast spin transfer across DNA subunits. The exploration of the above-mentioned ultrafast processes is crucial to elucidate our understanding of the mechanisms that are involved in causing DNA damage via direct-type effects of radiation. Only recently, investigations of these ultrafast processes have been attempted by studying concentrated solutions of nucleosides/tides under ambient conditions. Recent advancements of laser-driven picosecond electron accelerators have provided an opportunity to address some long-term puzzling questions in the context of direct-type and indirect effects of DNA damage. In this review, we have presented key findings that are important to elucidate mechanisms of complex processes including excess electron-mediated bond breakage and hole transfer, occurring at the single nucleoside/tide level.
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Affiliation(s)
- Jun Ma
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215000, China.
| | - Sergey A Denisov
- Laboratoire de Chimie Physique, UMR 8000 CNRS/Université Paris-Sud, Bât. 349, 91405 Orsay, CEDEX, France.
| | - Amitava Adhikary
- Department of Chemistry, Oakland University, 146 Library Drive, Rochester, MI 48309, USA.
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique, UMR 8000 CNRS/Université Paris-Sud, Bât. 349, 91405 Orsay, CEDEX, France.
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36
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Goetze RG, Buchholz SM, Ou N, Zhang Q, Patil S, Schirmer M, Singh SK, Ellenrieder V, Hessmann E, Lu QB, Neesse A. Preclinical Evaluation of 1,2-Diamino-4,5-Dibromobenzene in Genetically Engineered Mouse Models of Pancreatic Cancer. Cells 2019; 8:cells8060563. [PMID: 31181844 PMCID: PMC6627568 DOI: 10.3390/cells8060563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/04/2019] [Accepted: 06/06/2019] [Indexed: 12/15/2022] Open
Abstract
Background: Pancreatic ductal adenocarcinoma (PDAC) is highly resistant to standard chemo- and radiotherapy. Recently, a new class of non-platinum-based halogenated molecules (called FMD compounds) was discovered that selectively kills cancer cells. Here, we investigate the potential of 1,2-Diamino-4,5-dibromobenzene (2Br-DAB) in combination with standard chemotherapy and radiotherapy in murine and human PDAC. Methods: Cell viability and colony formation was performed in human (Panc1, BxPC3, PaTu8988t, MiaPaCa) and three murine LSL-KrasG12D/+;LSL-Trp53R172H/+;Pdx-1-Cre (KPC) pancreatic cancer cell lines. In vivo, preclinical experiments were conducted in LSL-KrasG12D/+;p48-Cre (KC) and KPC mice using 2Br-DAB (7 mg/kg, i.p.), +/- radiation (10 × 1.8 Gy), gemcitabine (100 mg/kg, i.p.), or a combination. Tumor growth and therapeutic response were assessed by high-resolution ultrasound and immunohistochemistry. Results: 2Br-DAB significantly reduced cell viability in human and murine pancreatic cancer cell lines in a dose-dependent manner. In particular, colony formation in human Panc1 cells was significantly decreased upon 25 µM 2Br-DAB + radiation treatment compared with vehicle control (p = 0.03). In vivo, 2Br-DAB reduced tumor frequency in KC mice. In the KPC model, 2Br-DAB or gemcitabine monotherapy had comparable therapeutic effects. Furthermore, the combination of gemcitabine and 2Br-DAB or 2Br-DAB and 18 Gy irradiation showed additional antineoplastic effects. Conclusions: 2Br-DAB is effective in killing pancreatic cancer cells in vitro. 2Br-DAB was not toxic in vivo, and additional antineoplastic effects were observed in combination with irradiation.
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Affiliation(s)
- Robert G Goetze
- Department of Gastroenterology and Gastrointestinal Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
| | - Soeren M Buchholz
- Department of Gastroenterology and Gastrointestinal Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
| | - Ning Ou
- Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
| | - Qinrong Zhang
- Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
| | - Shilpa Patil
- Department of Gastroenterology and Gastrointestinal Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
| | - Markus Schirmer
- Department of Radiotherapy and Radiation Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
| | - Shiv K Singh
- Department of Gastroenterology and Gastrointestinal Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
| | - Volker Ellenrieder
- Department of Gastroenterology and Gastrointestinal Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
| | - Elisabeth Hessmann
- Department of Gastroenterology and Gastrointestinal Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
| | - Qing-Bin Lu
- Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
| | - Albrecht Neesse
- Department of Gastroenterology and Gastrointestinal Oncology, University Medicine Goettingen, 37075 Goettingen, Germany.
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37
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Mendes M, Probst M, Maihom T, García G, Limão-Vieira P. Selective Bond Excision in Nitroimidazoles by Electron Transfer Experiments. J Phys Chem A 2019; 123:4068-4073. [PMID: 30995841 DOI: 10.1021/acs.jpca.9b02064] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have performed comprehensive charge-transfer experiments yielding negative ion formation in collisions of fast neutral potassium atoms with nitroimidazole and methylated derivative molecules. The anionic pattern reveals that in the unimolecular decomposition of the precursor parent anion, single and multiple bond cleavages are attained. Selective excision of hydrogen atoms from the N1 position in 4-nitroimidazole (4NI) is completely blocked upon methylation in 1-methyl-4-nitroimidazole (1m4NI) and 1-methyl-5-nitroimidazole (1m5NI). Additionally, only 4NI and 2-nitroimidazole (2NI) are efficient in selectively producing neutral •OH and NO• radicals in contrast to 1m4NI and 1m5NI. These findings present a novel experimental evidence of selective chemical bond breaking by just tuning the proper collision energy in atom-molecule collision experiments. The present work contributes to the current need of pinpointing a class of charge-transfer collisions that exhibit selective reactivity of the kind demonstrated here, extending to tailored chemical control for different applications such as tumor radiation therapy through nitroimidazole-based radiosensitization.
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Affiliation(s)
- M Mendes
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics , Universidade NOVA de Lisboa , Campus de Caparica , 2829-516 Caparica , Portugal.,Instituto de Física Fundamental , Consejo Superior de Investigaciones Científicas , Serrano 113-bis , 28006 Madrid , Spain
| | - M Probst
- Institut für Ionenphysik und Angewandte Physik , Leopold Franzens Universität Innsbruck , Technikerstrasse 25 , 6020 Innsbruck , Austria
| | - T Maihom
- Department of Chemistry, Faculty of Liberal Arts and Science , Kasetsart University , Kamphaeng Saen Campus , Nakhon Pathom 73140 , Thailand
| | - G García
- Instituto de Física Fundamental , Consejo Superior de Investigaciones Científicas , Serrano 113-bis , 28006 Madrid , Spain
| | - P Limão-Vieira
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics , Universidade NOVA de Lisboa , Campus de Caparica , 2829-516 Caparica , Portugal
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38
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Mendes M, Pamplona B, Kumar S, da Silva FF, Aguilar A, García G, Bacchus-Montabonel MC, Limao-Vieira P. Ion-Pair Formation in Neutral Potassium-Neutral Pyrimidine Collisions: Electron Transfer Experiments. Front Chem 2019; 7:264. [PMID: 31058139 PMCID: PMC6482480 DOI: 10.3389/fchem.2019.00264] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/01/2019] [Indexed: 11/13/2022] Open
Abstract
We report novel data on ion-pair formation in hyperthermal (30–800 eV) neutral potassium collisions with neutral pyrimidine (Pyr, C4H4N2) molecules. In this collision regime, negative ions formed by electron transfer from the alkali atom to the target molecule were time-of-flight mass analyzed and the fragmentation patterns and branching ratios have been obtained. The most abundant product anions have been assigned to CN− and C2H− and the electron transfer mechanisms are comprehensively discussed. Particular importance is also given to the efficient loss of integrity of the pyrimidine ring in the presence of an extra electron, which is in contrast to dissociative electron attachment experiments yielding the dehydrogenated parent anion. Theoretical calculations were performed for pyrimidine in the presence of a potassium atom and provided a strong basis for the assignment of the lowest unoccupied molecular orbitals accessed in the collision process. In order to further our knowledge about the collision dynamics, potassium cation (K+) energy loss spectrum has been obtained and within this context, we also discuss the role of the accessible electronic states. A vertical electron affinity of (−5.69 ± 0.20) eV was obtained and may be assigned to a π3*(b1) state that leads to CN− formation.
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Affiliation(s)
- Mónica Mendes
- Atomic and Molecular Collisions Laboratory, Centre of Physics and Technological Research (CEFITEC), Department of Physics, Universidade NOVA de Lisboa, Costa de Caparica, Portugal.,Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Beatriz Pamplona
- Atomic and Molecular Collisions Laboratory, Centre of Physics and Technological Research (CEFITEC), Department of Physics, Universidade NOVA de Lisboa, Costa de Caparica, Portugal
| | - Sarvesh Kumar
- Atomic and Molecular Collisions Laboratory, Centre of Physics and Technological Research (CEFITEC), Department of Physics, Universidade NOVA de Lisboa, Costa de Caparica, Portugal
| | - Filipe Ferreira da Silva
- Atomic and Molecular Collisions Laboratory, Centre of Physics and Technological Research (CEFITEC), Department of Physics, Universidade NOVA de Lisboa, Costa de Caparica, Portugal
| | - Antonio Aguilar
- Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Barcelona, Spain
| | - Gustavo García
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | | | - Paulo Limao-Vieira
- Atomic and Molecular Collisions Laboratory, Centre of Physics and Technological Research (CEFITEC), Department of Physics, Universidade NOVA de Lisboa, Costa de Caparica, Portugal
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39
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Pavliuk MV, Gutiérrez Álvarez S, Hattori Y, Messing ME, Czapla-Masztafiak J, Szlachetko J, Silva JL, Araujo CM, A Fernandes DL, Lu L, Kiely CJ, Abdellah M, Nordlander P, Sá J. Hydrated Electron Generation by Excitation of Copper Localized Surface Plasmon Resonance. J Phys Chem Lett 2019; 10:1743-1749. [PMID: 30920838 DOI: 10.1021/acs.jpclett.9b00792] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Hydrated electrons are important in radiation chemistry and charge-transfer reactions, with applications that include chemical damage of DNA, catalysis, and signaling. Conventionally, hydrated electrons are produced by pulsed radiolysis, sonolysis, two-ultraviolet-photon laser excitation of liquid water, or photodetachment of suitable electron donors. Here we report a method for the generation of hydrated electrons via single-visible-photon excitation of localized surface plasmon resonances (LSPRs) of supported sub-3 nm copper nanoparticles in contact with water. Only excitations at the LSPR maximum resulted in the formation of hydrated electrons, suggesting that plasmon excitation plays a crucial role in promoting electron transfer from the nanoparticle into the solution. The reactivity of the hydrated electrons was confirmed via proton reduction and concomitant H2 evolution in the presence of a Ru/TiO2 catalyst.
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Affiliation(s)
- Mariia V Pavliuk
- Physical Chemistry Division, Department of Chemistry, Ångström Laboratory , Uppsala University , 75120 Uppsala , Sweden
| | - Sol Gutiérrez Álvarez
- Physical Chemistry Division, Department of Chemistry, Ångström Laboratory , Uppsala University , 75120 Uppsala , Sweden
| | - Yocefu Hattori
- Physical Chemistry Division, Department of Chemistry, Ångström Laboratory , Uppsala University , 75120 Uppsala , Sweden
| | - Maria E Messing
- Solid State Physics and NanoLund , Lund University , Box 118, 22100 Lund , Sweden
| | | | - Jakub Szlachetko
- Institute of Nuclear Physics , Polish Academy of Sciences , PL-31342 Krakow , Poland
- Institute of Physical Chemistry , Polish Academy of Sciences , 01-224 Warsaw , Poland
| | - Jose L Silva
- Materials Theory Division, Department of Physics and Astronomy , Uppsala University , 75120 Uppsala , Sweden
| | - Carlos Moyses Araujo
- Materials Theory Division, Department of Physics and Astronomy , Uppsala University , 75120 Uppsala , Sweden
| | - Daniel L A Fernandes
- Physical Chemistry Division, Department of Chemistry, Ångström Laboratory , Uppsala University , 75120 Uppsala , Sweden
| | - Li Lu
- Department of Materials Science and Engineering , Lehigh University , 5 East Packer Avenue , Bethlehem , Pennsylvania 18015 , United States
| | - Christopher J Kiely
- Department of Materials Science and Engineering , Lehigh University , 5 East Packer Avenue , Bethlehem , Pennsylvania 18015 , United States
| | - Mohamed Abdellah
- Physical Chemistry Division, Department of Chemistry, Ångström Laboratory , Uppsala University , 75120 Uppsala , Sweden
- Department of Chemistry, Qena Faculty of Science , South Valley University , 83523 Qena , Egypt
| | - Peter Nordlander
- Department of Physics , Rice University , 6100 South Main Street , Houston , Texas 77251-1892 , United States
| | - Jacinto Sá
- Physical Chemistry Division, Department of Chemistry, Ångström Laboratory , Uppsala University , 75120 Uppsala , Sweden
- Institute of Physical Chemistry , Polish Academy of Sciences , 01-224 Warsaw , Poland
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40
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Syroeshkin MA, Kuriakose F, Saverina EA, Timofeeva VA, Egorov MP, Alabugin IV. Hochkonversion von Reduktionsmitteln. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201807247] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mikhail A. Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry Leninskyprosp. 47 119991 Moskau Russland
| | - Febin Kuriakose
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
| | - Evgeniya A. Saverina
- N. D. Zelinsky Institute of Organic Chemistry Leninskyprosp. 47 119991 Moskau Russland
- UMR CNRS 6226 ISCR University of Rennes 1 Rennes Frankreich
| | | | - Mikhail P. Egorov
- N. D. Zelinsky Institute of Organic Chemistry Leninskyprosp. 47 119991 Moskau Russland
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
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41
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Syroeshkin MA, Kuriakose F, Saverina EA, Timofeeva VA, Egorov MP, Alabugin IV. Upconversion of Reductants. Angew Chem Int Ed Engl 2019; 58:5532-5550. [DOI: 10.1002/anie.201807247] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Mikhail A. Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russia
| | - Febin Kuriakose
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
| | - Evgeniya A. Saverina
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russia
- UMR CNRS 6226 ISCR University of Rennes 1 Rennes France
| | | | - Mikhail P. Egorov
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russia
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
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42
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Zhao-Qi W, Hai-Yan W, Zeng ZY, Yan C. Ab initio investigation of possible lower-energy candidate structure for cationic water cluster (H2O) 12+ via particle swarm optimization method. Struct Chem 2019. [DOI: 10.1007/s11224-018-1182-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Abstract
A cavity or excluded-volume structure best explains the experimental properties of the aqueous or “hydrated” electron.
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Affiliation(s)
- John M. Herbert
- Department of Chemistry & Biochemistry
- The Ohio State University
- Columbus
- USA
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44
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Ab initio investigation of the lower-energy candidate structures for (H2O)10+ water cluster. Struct Chem 2018. [DOI: 10.1007/s11224-018-1109-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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45
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Das L, Adhikari S. Direct Observation of Solvated Electrons in Deep Eutectic Solvents: Efficient Capture of Presolvated Electrons by DNA Base. J Phys Chem B 2018; 122:8900-8907. [PMID: 30169955 DOI: 10.1021/acs.jpcb.8b04691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The solvated electron being the simplest form of an extremely reactive intermediate is of great fundamental interest in chemistry, physics, and biology since its discovery. Recently, deep eutectic solvents (DESs) have been in focus as biodegradable and cost-effective alternative to ionic liquids (ILs) for different applications. These include areas where electron transport and transfer processes are involved. Herein, we present the first report on the existence, yield, and properties of solvated electrons in three deep eutectic solvents, reline, ethaline, and glyceline, composed of choline chloride as a hydrogen bond acceptor and urea, ethylene glycol, and glycerol (Gly) as hydrogen bond donors, respectively, at a molar ratio of 1:2. The varied transient absorption spectra of solvated electrons in these DESs have been explained on the basis of polarity, hydrogen-bonding effect, and the moieties responsible for creating the environment for solvation. The yield and average lifetime follow the trends in viscosity as well as the reactivity of electrons with the components. The C37 value, a measure of the efficiency of scavenging presolvated electrons, is the highest in ethaline in the case of nitrate ions, which indicates the slowest solvation process in this DES. The presolvated electron capture by a DNA base, an aspect considered to be important in cancer radiotherapy, could be monitored conveniently in these liquids at a much longer time scale compared to that reported in aqueous solutions. Bimolecular rate constants for the reaction of solvated electrons with nitrate and the DNA base have been calculated and compared in the three DESs. Unlike in ILs, these experimentally obtained values are comparable to the diffusion-controlled rate constants in DESs.
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Affiliation(s)
- Laboni Das
- Radiation and Photochemistry Division , Bhabha Atomic Research Centre , Mumbai 400085 , India.,Homi Bhabha National Institute , Training School Complex , Anushaktinagar, Mumbai 400094 , India
| | - Soumyakanti Adhikari
- Homi Bhabha National Institute , Training School Complex , Anushaktinagar, Mumbai 400094 , India
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46
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Cunha T, Mendes M, Ferreira da Silva F, Eden S, García G, Limão-Vieira P. Communication: Site-selective bond excision of adenine upon electron transfer. J Chem Phys 2018; 148:021101. [PMID: 29331144 DOI: 10.1063/1.5018401] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This work demonstrates that selective excision of hydrogen atoms at a particular site of the DNA base adenine can be achieved in collisions with electronegative atoms by controlling the impact energy. The result is based on analysing the time-of-flight mass spectra yields of potassium collisions with a series of labeled adenine derivatives. The production of dehydrogenated parent anions is consistent with neutral H loss either from selective breaking of C-H or N-H bonds. These unprecedented results open up a new methodology in charge transfer collisions that can initiate selective reactivity as a key process in chemical reactions that are dominant in different areas of science and technology.
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Affiliation(s)
- T Cunha
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - M Mendes
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - F Ferreira da Silva
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - S Eden
- School of Physical Sciences, The Open University, Walton Hall, MK7 6AA Milton Keynes, United Kingdom
| | - G García
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas, Serrano 113-bis, 28006 Madrid, Spain
| | - P Limão-Vieira
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
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47
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Hahn MB, Meyer S, Schröter MA, Seitz H, Kunte HJ, Solomun T, Sturm H. Direct electron irradiation of DNA in a fully aqueous environment. Damage determination in combination with Monte Carlo simulations. Phys Chem Chem Phys 2018; 19:1798-1805. [PMID: 28059422 DOI: 10.1039/c6cp07707b] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We report on a study in which plasmid DNA in water was irradiated with 30 keV electrons generated by a scanning electron microscope and passed through a 100 nm thick Si3N4 membrane. The corresponding Monte Carlo simulations suggest that the kinetic energy spectrum of the electrons throughout the water is dominated by low energy electrons (<100 eV). The DNA radiation damage, single-strand breaks (SSBs) and double-strand breaks (DSBs), was determined by gel electrophoresis. The median lethal dose of D1/2 = 1.7 ± 0.3 Gy was found to be much smaller as compared to partially or fully hydrated DNA irradiated under vacuum conditions. The ratio of the DSBs to SSBs was found to be 1 : 12 as compared to 1 : 88 found for hydrated DNA. Our method enables quantitative measurements of radiation damage to biomolecules (DNA, proteins) in solutions under varying conditions (pH, salinity, co-solutes) for an electron energy range which is difficult to probe by standard methods.
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Affiliation(s)
- Marc Benjamin Hahn
- Free University Berlin, Department of Physics, D-14195 Berlin, Germany. and Bundesanstalt für Materialforschung und Prüfung, D-12205 Berlin, Germany.
| | - Susann Meyer
- Bundesanstalt für Materialforschung und Prüfung, D-12205 Berlin, Germany. and University of Potsdam, Institute of Biochemistry and Biology, D-14476 Potsdam, Germany
| | | | - Harald Seitz
- Fraunhofer-Institut für Zelltherapie und Immunologie, Institutsteil Bioanalytik und Bioprozesse, D-14476 Potsdam, Germany
| | - Hans-Jörg Kunte
- Bundesanstalt für Materialforschung und Prüfung, D-12205 Berlin, Germany.
| | - Tihomir Solomun
- Bundesanstalt für Materialforschung und Prüfung, D-12205 Berlin, Germany.
| | - Heinz Sturm
- Bundesanstalt für Materialforschung und Prüfung, D-12205 Berlin, Germany. and Technical University Berlin, D-10587 Berlin, Germany
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48
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Cunha T, Mendes M, Ferreira da Silva F, Eden S, García G, Bacchus-Montabonel MC, Limão-Vieira P. Electron transfer driven decomposition of adenine and selected analogs as probed by experimental and theoretical methods. J Chem Phys 2018; 148:134301. [PMID: 29626890 DOI: 10.1063/1.5021888] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report on a combined experimental and theoretical study of electron-transfer-induced decomposition of adenine (Ad) and a selection of analog molecules in collisions with potassium (K) atoms. Time-of-flight negative ion mass spectra have been obtained in a wide collision energy range (6-68 eV in the centre-of-mass frame), providing a comprehensive investigation of the fragmentation patterns of purine (Pu), adenine (Ad), 9-methyl adenine (9-mAd), 6-dimethyl adenine (6-dimAd), and 2-D adenine (2-DAd). Following our recent communication about selective hydrogen loss from the transient negative ions (TNIs) produced in these collisions [T. Cunha et al., J. Chem. Phys. 148, 021101 (2018)], this work focuses on the production of smaller fragment anions. In the low-energy part of the present range, several dissociation channels that are accessible in free electron attachment experiments are absent from the present mass spectra, notably NH2 loss from adenine and 9-methyl adenine. This can be understood in terms of a relatively long transit time of the K+ cation in the vicinity of the TNI tending to enhance the likelihood of intramolecular electron transfer. In this case, the excess energy can be redistributed through the available degrees of freedom inhibiting fragmentation pathways. Ab initio theoretical calculations were performed for 9-methyl adenine (9-mAd) and adenine (Ad) in the presence of a potassium atom and provided a strong basis for the assignment of the lowest unoccupied molecular orbitals accessed in the collision process.
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Affiliation(s)
- T Cunha
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - M Mendes
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - F Ferreira da Silva
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - S Eden
- School of Physical Sciences, The Open University, Walton Hall, MK7 6AA Milton Keynes, United Kingdom
| | - G García
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (CSIC), Serrano 113-bis, 28006 Madrid, Spain
| | - M-C Bacchus-Montabonel
- Institut Lumiére Matiére, Université Lyon, Université Claude Bernard Lyon 1, CNRS, 69622 Villeurbanne, France
| | - P Limão-Vieira
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
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49
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Kočišek J, Sedmidubská B, Indrajith S, Fárník M, Fedor J. Electron Attachment to Microhydrated Deoxycytidine Monophosphate. J Phys Chem B 2018; 122:5212-5217. [PMID: 29706064 DOI: 10.1021/acs.jpcb.8b03033] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
DNA constituents are effectively decomposed via dissociative electron attachment (DEA). However, the DEA contribution to radiation damage in living tissues is a subject of ongoing discussion. We address an essential question, how aqueous environment influences the DEA to DNA. In particular, we report experimental fragmentation patterns for DEA to microhydrated 2-deoxycytidine 5-monophosphate (dCMP). Isolated dCMP was previously set as a model to describe mechanisms of DNA-strand breaks induced by secondary electrons and decomposes primarily by dissociation of the C-O phosphoester bond. We show that hydrated molecules decompose via dissociation of the C-N glycosidic bond followed by dissociation of the P-O bond. This significant change of the proposed mechanism can be interpreted by a reactive role of water in the postattachment dynamics. Comparison of the fragmentation with previous macroscopic irradiation studies suggests that the actual contribution of DEA to DNA radiation damage in living tissue is rather small.
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Affiliation(s)
- Jaroslav Kočišek
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3 , 18223 Prague , Czech Republic
| | - Barbora Sedmidubská
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3 , 18223 Prague , Czech Republic.,Deptartment of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering , Czech Technical University in Prague , Brehová 7 , 115 19 Prague , Czech Republic
| | | | - Michal Fárník
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3 , 18223 Prague , Czech Republic
| | - Juraj Fedor
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences , Dolejškova 3 , 18223 Prague , Czech Republic
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50
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Abstract
The ionizing radiation in aqueous solutions of gold nanoparticles, stabilized by electrostatic non-covalent intermolecular forces and steric interactions, with antimicrobial compounds, are investigated with picosecond pulse radiolysis techniques. Upon pulse radiolysis of an aqueous solution containing very low concentrations of gold nanoparticles with naked surfaces available in water (not obstructed by chemical bonds), a change to Cerenkov spectrum over a large range of wavelengths are observed and pre-solvated electrons are captured by gold nanoparticles exclusively (not by ionic liquid surfactants used to stabilize the nanoparticles). The solvated electrons are also found to decay rapidly compared with the decay kinetics in water. These very fast reactions with electrons in water could provide an enhanced oxidizing zone around gold nanoparticles and this could be the reason for radio sensitizing behavior of gold nanoparticles in radiation therapy.
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