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For: Laschinsky L, Karsch L, Leßmann E, Oppelt M, Pawelke J, Richter C, Schürer M, Beyreuther E. Radiobiological influence of megavoltage electron pulses of ultra-high pulse dose rate on normal tissue cells. Radiat Environ Biophys 2016;55:381-91. [PMID: 27193178 DOI: 10.1007/s00411-016-0652-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 05/09/2016] [Indexed: 05/25/2023]

For:	Laschinsky L, Karsch L, Leßmann E, Oppelt M, Pawelke J, Richter C, Schürer M, Beyreuther E. Radiobiological influence of megavoltage electron pulses of ultra-high pulse dose rate on normal tissue cells. Radiat Environ Biophys 2016;55:381-91. [PMID: 27193178 DOI: 10.1007/s00411-016-0652-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 05/09/2016] [Indexed: 05/25/2023]

Number

Cited by Other Article(s)

Harutyunyan T, Sargsyan A, Kalashyan L, Igityan H, Grigoryan B, Davtyan H, Aroutiounian R, Liehr T, Hovhannisyan G. Changes in Telomere Length in Leukocytes and Leukemic Cells after Ultrashort Electron Beam Radiation. Int J Mol Sci 2024;25:6709. [PMID: 38928414 PMCID: PMC11203595 DOI: 10.3390/ijms25126709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/13/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open

Affiliation(s)

Tigran Harutyunyan Laboratory of General and Molecular Genetics, Research Institute of Biology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia; (T.H.); (A.S.); (L.K.); (H.I.); (R.A.); (G.H.) Department of Genetics and Cytology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia
Anzhela Sargsyan Laboratory of General and Molecular Genetics, Research Institute of Biology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia; (T.H.); (A.S.); (L.K.); (H.I.); (R.A.); (G.H.) Department of Genetics and Cytology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia
Lily Kalashyan Laboratory of General and Molecular Genetics, Research Institute of Biology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia; (T.H.); (A.S.); (L.K.); (H.I.); (R.A.); (G.H.)
Hovhannes Igityan Laboratory of General and Molecular Genetics, Research Institute of Biology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia; (T.H.); (A.S.); (L.K.); (H.I.); (R.A.); (G.H.)
Bagrat Grigoryan CANDLE Synchrotron Research Institute, Acharyan 31, Yerevan 0040, Armenia; (B.G.); (H.D.)
Hakob Davtyan CANDLE Synchrotron Research Institute, Acharyan 31, Yerevan 0040, Armenia; (B.G.); (H.D.)
Rouben Aroutiounian Laboratory of General and Molecular Genetics, Research Institute of Biology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia; (T.H.); (A.S.); (L.K.); (H.I.); (R.A.); (G.H.) Department of Genetics and Cytology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia
Thomas Liehr Institute of Human Genetics, Jena University Hospital, Friedrich Schiller University, Am Klinikum 1, D-07747 Jena, Germany
Galina Hovhannisyan Laboratory of General and Molecular Genetics, Research Institute of Biology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia; (T.H.); (A.S.); (L.K.); (H.I.); (R.A.); (G.H.) Department of Genetics and Cytology, Yerevan State University, Alex Manoogian 1, Yerevan 0025, Armenia

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Metzkes-Ng J, Brack FE, Kroll F, Bernert C, Bock S, Bodenstein E, Brand M, Cowan TE, Gebhardt R, Hans S, Helbig U, Horst F, Jansen J, Kraft SD, Krause M, Leßmann E, Löck S, Pawelke J, Püschel T, Reimold M, Rehwald M, Richter C, Schlenvoigt HP, Schramm U, Schürer M, Seco J, Szabó ER, Umlandt MEP, Zeil K, Ziegler T, Beyreuther E. The DRESDEN PLATFORM is a research hub for ultra-high dose rate radiobiology. Sci Rep 2023;13:20611. [PMID: 37996453 PMCID: PMC10667545 DOI: 10.1038/s41598-023-46873-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023] Open

Affiliation(s)

Josefine Metzkes-Ng Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Florian-Emanuel Brack Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Florian Kroll Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Constantin Bernert Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany TUD Dresden University of Technology, Dresden, Germany
Stefan Bock Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Elisabeth Bodenstein Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Michael Brand Center for Regenerative Therapies (CRTD), TUD Dresden University of Technology, Dresden, Germany Cluster of Excellence - Physics of Life, TUD Dresden University of Technology, Dresden, Germany
Thomas E Cowan Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany TUD Dresden University of Technology, Dresden, Germany
René Gebhardt Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Stefan Hans Center for Regenerative Therapies (CRTD), TUD Dresden University of Technology, Dresden, Germany Cluster of Excellence - Physics of Life, TUD Dresden University of Technology, Dresden, Germany
Uwe Helbig Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Felix Horst Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Jeannette Jansen German Cancer Research Center (DKFZ), Heidelberg, Germany Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
Stephan D Kraft Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Mechthild Krause Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany Department of Radiotherapy and Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Dresden, Germany German Cancer Consortium (DKTK), partner site Dresden, and German Cancer Research Center (DKFZ), Heidelberg, Dresden, Germany National Center for Tumor Diseases (NCT/UCC), Dresden, Germany: German Cancer Research Center (DKFZ), Heidelberg, Germany; Medizinische Fakultät and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Dresden, Germany; Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Elisabeth Leßmann Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Steffen Löck OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany Department of Radiotherapy and Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Dresden, Germany German Cancer Consortium (DKTK), partner site Dresden, and German Cancer Research Center (DKFZ), Heidelberg, Dresden, Germany
Jörg Pawelke Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Thomas Püschel Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Marvin Reimold Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Martin Rehwald Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Christian Richter Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany Department of Radiotherapy and Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Dresden, Germany German Cancer Consortium (DKTK), partner site Dresden, and German Cancer Research Center (DKFZ), Heidelberg, Dresden, Germany
Hans-Peter Schlenvoigt Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Ulrich Schramm Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany TUD Dresden University of Technology, Dresden, Germany
Michael Schürer OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany National Center for Tumor Diseases (NCT/UCC), Dresden, Germany: German Cancer Research Center (DKFZ), Heidelberg, Germany; Medizinische Fakultät and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Dresden, Germany; Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Joao Seco German Cancer Research Center (DKFZ), Heidelberg, Germany Faculty of Physics and Astronomy, Ruprecht-Karls-University, Heidelberg, Germany
Emília Rita Szabó ELI ALPS, ELI-HU Non-Profit Ltd., Szeged, Hungary Department of Oncotherapy, University of Szeged, Szeged, Hungary
Marvin E P Umlandt Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany TUD Dresden University of Technology, Dresden, Germany
Karl Zeil Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Tim Ziegler Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany TUD Dresden University of Technology, Dresden, Germany
Elke Beyreuther Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany. OncoRay - National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.

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Atkinson J, Bezak E, Le H, Kempson I. The current status of FLASH particle therapy: a systematic review. Phys Eng Sci Med 2023;46:529-560. [PMID: 37160539 DOI: 10.1007/s13246-023-01266-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 04/20/2023] [Indexed: 05/11/2023]

Gao Y, Liu R, Chang C, Charyyev S, Zhou J, Bradley JD, Liu T, Yang X. A potential revolution in cancer treatment: A topical review of FLASH radiotherapy. J Appl Clin Med Phys 2022;23:e13790. [PMID: 36168677 PMCID: PMC9588273 DOI: 10.1002/acm2.13790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 07/08/2022] [Accepted: 09/01/2022] [Indexed: 11/26/2022] Open

The Effect of Low-Energy Laser-Driven Ultrashort Pulsed Electron Beam Irradiation on Erythropoiesis and Oxidative Stress in Rats. Int J Mol Sci 2022;23:ijms23126692. [PMID: 35743135 PMCID: PMC9223873 DOI: 10.3390/ijms23126692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/06/2022] [Accepted: 06/10/2022] [Indexed: 12/04/2022] Open

Tsakanova G, Babayan N, Karalova E, Hakobyan L, Abroyan L, Avetisyan A, Avagyan H, Hakobyan S, Poghosyan A, Baghdasaryan B, Arakelova E, Ayvazyan V, Matevosyan L, Navasardyan A, Davtyan H, Apresyan L, Yeremyan A, Aroutiounian R, Osipov AN, Grigoryan B, Karalyan Z. Low-Energy Laser-Driven Ultrashort Pulsed Electron Beam Irradiation-Induced Immune Response in Rats. Int J Mol Sci 2021;22:ijms222111525. [PMID: 34768958 PMCID: PMC8584044 DOI: 10.3390/ijms222111525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 11/16/2022] Open

Affiliation(s)

Gohar Tsakanova Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.) Correspondence: ; Tel.: +374-941-23070
Nelly Babayan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) Department of Genetics and Cytology, Faculty of Biology, Yerevan State University, Yerevan 0025, Armenia
Elena Karalova Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) Experimental Laboratory, Yerevan State Medical University after Mkhitar Heratsi, Yerevan 0025, Armenia
Lina Hakobyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
Liana Abroyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
Aida Avetisyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) Experimental Laboratory, Yerevan State Medical University after Mkhitar Heratsi, Yerevan 0025, Armenia
Hranush Avagyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) Experimental Laboratory, Yerevan State Medical University after Mkhitar Heratsi, Yerevan 0025, Armenia
Sona Hakobyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
Arpine Poghosyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
Bagrat Baghdasaryan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
Elina Arakelova Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
Violetta Ayvazyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
Lusine Matevosyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
Arpine Navasardyan CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
Hakob Davtyan CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
Lilit Apresyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)
Arsham Yeremyan CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
Rouben Aroutiounian Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.) Department of Genetics and Cytology, Faculty of Biology, Yerevan State University, Yerevan 0025, Armenia
Andreyan N. Osipov Group for Radiation Biochemistry of Nucleic Acids, N.N. Semenov Federal Research for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia; Laboratory for the Development of Innovative Drugs and Agricultural Biotechnology, Moscow Institute of Physics and Technology, 141701 Moscow, Russia Experimental Radiobiology and Radiation Medicine Department, State Research Center—Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, 123098 Moscow, Russia
Bagrat Grigoryan CANDLE Synchrotron Research Institute, Yerevan 0040, Armenia; (A.N.); (H.D.); (A.Y.); (B.G.)
Zaven Karalyan Institute of Molecular Biology NAS RA, Yerevan 0014, Armenia; (N.B.); (E.K.); (L.H.); (L.A.); (A.A.); (H.A.); (S.H.); (A.P.); (B.B.); (E.A.); (V.A.); (L.M.); (L.A.); (R.A.); (Z.K.)

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Pawelke J, Brand M, Hans S, Hideghéty K, Karsch L, Lessmann E, Löck S, Schürer M, Szabó ER, Beyreuther E. Electron dose rate and oxygen depletion protect zebrafish embryos from radiation damage. Radiother Oncol 2021;158:7-12. [DOI: 10.1016/j.radonc.2021.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 10/22/2022]

VandenBussche EJ, Flannigan DJ. Reducing Radiation Damage in Soft Matter with Femtosecond-Timed Single-Electron Packets. NANO LETTERS 2019;19:6687-6694. [PMID: 31433192 DOI: 10.1021/acs.nanolett.9b03074] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]

Abstract

Despite the development of a myriad of mitigation methods, radiation damage continues to be a major limiting factor in transmission electron microscopy. Intriguing results have been reported using pulsed-laser driven and chopped electron beams for modulated dose delivery, but the underlying relationships and effects remain unclear. Indeed, delivering precisely timed single-electron packets to the specimen has yet to be systematically explored, and no direct comparisons to conventional methods within a common parameter space have been made. Here, using a model linear saturated hydrocarbon (n-hexatriacontane, C₃₆H₇₄), we show that precisely timed delivery of each electron to the specimen, with a well-defined and uniform time between arrival, leads to a repeatable reduction in damage compared to conventional ultralow-dose methods for the same dose rate and the same accumulated dose. Using a femtosecond pulsed laser to confine the probability of electron emission to a 300 fs temporal window, we find damage to be sensitively dependent on the time between electron arrival (controlled with the laser repetition rate) and on the number of electrons per packet (controlled with the laser-pulse energy). Relative arrival times of 5, 20, and 100 μs were tested for electron packets comprised of, on average, 1, 5, and 20 electrons. In general, damage increased with decreasing time between electrons and, more substantially, with increasing electron number. Further, we find that improvements relative to conventional methods vanish once a threshold number of electrons per packet is reached. The results indicate that precise electron-by-electron dose delivery leads to a repeatable reduction in irreversible structural damage, and the systematic studies indicate this arises from control of the time between sequential electrons arriving within the same damage radius, all else being equal.

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Harutyunyan T, Hovhannisyan G, Sargsyan A, Grigoryan B, Al-Rikabi AH, Weise A, Liehr T, Aroutiounian R. Analysis of copy number variations induced by ultrashort electron beam radiation in human leukocytes in vitro. Mol Cytogenet 2019;12:18. [PMID: 31131024 PMCID: PMC6524226 DOI: 10.1186/s13039-019-0433-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 05/01/2019] [Indexed: 12/13/2022] Open

Abstract

BACKGROUND

Environmental risk factors have been shown to alter DNA copy number variations (CNVs). Recently, CNVs have been described to arise after low-dose ionizing radiation in vitro and in vivo. Development of cost- and size-effective laser-driven electron accelerators (LDEAs), capable to deliver high energy beams in pico- or femtosecond durations requires examination of their biological effects. Here we studied in vitro impact of LDEAs radiation on known CNV hotspots in human peripheral blood lymphocytes on single cell level.

RESULTS

Here CNVs in chromosomal regions 1p31.1, 7q11.22, 9q21.3, 10q21.1 and 16q23.1 earlier reported to be sensitive to ionizing radiation were analyzed using molecular cytogenetics. Irradiation of cells with 0.5, 1.5 and 3.0 Gy significantly increased signal intensities in all analyzed chromosomal regions compared to controls. The latter is suggested to be due to radiation-induced duplication or amplification of CNV stretches. As significantly lower gains in mean fluorescence intensities were observed only for chromosomal locus 1p31.1 (after irradiation with 3.0 Gy variant sensitivites of different loci to LDEA is suggested. Negative correlation was found between fluorescence intensities and chromosome size (r = - 0.783, p < 0.001) in cells exposed to 3.0 Gy irradiation and between fluorescence intensities and gene density (r = - 0.475, p < 0.05) in cells exposed to 0.5 Gy irradiation.

CONCLUSIONS

In this study we demonstrated that irradiation with laser-driven electron bunches can induce molecular-cytogenetically visible CNVs in human blood leukocytes in vitro. These CNVs occur most likely due to duplications or amplification and tend to inversely correlate with chromosome size and gene density. CNVs can last in cell population as stable chromosomal changes for several days after radiation exposure; therefore this endpoint can be used for characterization of genetic effects of accelerated electrons. These findings should be complemented with other studies and implementation of more sophisticated approaches for CNVs analysis.

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Vozenin MC, Hendry JH, Limoli CL. Biological Benefits of Ultra-high Dose Rate FLASH Radiotherapy: Sleeping Beauty Awoken. Clin Oncol (R Coll Radiol) 2019;31:407-415. [PMID: 31010708 DOI: 10.1016/j.clon.2019.04.001] [Citation(s) in RCA: 278] [Impact Index Per Article: 55.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 12/14/2022]

Babayan N, Hovhannisyan G, Grigoryan B, Grigoryan R, Sarkisyan N, Tsakanova G, Haroutiunian S, Aroutiounian R. Dose-rate effect of ultrashort electron beam radiation on DNA damage and repair in vitro. JOURNAL OF RADIATION RESEARCH 2017;58:894-897. [PMID: 28992052 PMCID: PMC5737585 DOI: 10.1093/jrr/rrx035] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Indexed: 05/07/2023]