1
|
Flacco A, Bayart E, Romagnani L, Cavallone M, De Marzi L, Fouillade C, Giaccaglia C, Heinrich S, Lamarre-Jouenne I, Monzac J, Parodi K, Patriarca A, Rösch T, Schreiber J, Tischendorf L. Laser driven FLASH radiobiology using a high dose and ultra high dose rate single pulse proton source. Sci Rep 2025; 15:16511. [PMID: 40360597 PMCID: PMC12075504 DOI: 10.1038/s41598-025-01105-z] [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: 11/20/2024] [Accepted: 05/02/2025] [Indexed: 05/15/2025] Open
Abstract
Laser-driven proton sources have long been developed with an eye on their potential for medical application to radiation therapy. These sources are compact, versatile, and show peculiar characteristics such as extreme instantaneous dose rates, short duration and broad energy spectrum. Typical temporal modality of laser-driven irradiation, the so-called fast-fractionation, results from the composition of multiple, temporally separated, ultra-short dose fractions. In this paper we present the use of a high-energy laser system for delivering the target dose in a single nanosecond pulse, for ultra-fast irradiation of biological samples. A transport line composed by two permanent-magnet quadrupoles and a scattering system is used to improve the dose profile and to control the delivered dose-per-pulse. A single-shot dosimetry protocol for the broad-spectrum proton source using Monte Carlo simulations was developed. Doses as high as 20 Gy could be delivered in a single shot, lasting less than 10 ns over a 1 cm diameter biological sample, at a dose-rate exceeding [Formula: see text]. Exploratory application of extreme laser-driven irradiation conditions, falling within the FLASH irradiation protocol, are presented for irradiation in vitro and in vivo. A reduction of radiation-induced oxidative stress in vitro and radiation-induced developmental damage compatible with the onset of FLASH effect were observed in vivo, whereas anti-tumoral efficacy was confirmed by cell survival assay.
Collapse
Affiliation(s)
- A Flacco
- Laboratoire d'Optique Appliquée, ENSTA Paris, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau, France.
| | - E Bayart
- Laboratoire d'Optique Appliquée, ENSTA Paris, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau, France
| | - L Romagnani
- LULI, CNRS, École Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau, France
| | - M Cavallone
- Department of Radiation Oncology, Campus Universitaire, Institut Curie, Centre de Protonthérapie d'Orsay, PSL Research University, 91898, Orsay, France
| | - L De Marzi
- Department of Radiation Oncology, Campus Universitaire, Institut Curie, Centre de Protonthérapie d'Orsay, PSL Research University, 91898, Orsay, France
- INSERM LITO 1288, Campus Universitaire, Institut Curie, PSL Research University, University Paris-Saclay, 91898, Orsay, France
| | - C Fouillade
- Institut Curie, INSERM U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405, Orsay Cedex, France
- Institut Curie, PSL Research University, 75006, Paris, France
| | - C Giaccaglia
- Laboratoire d'Optique Appliquée, ENSTA Paris, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau, France
| | - S Heinrich
- Institut Curie, INSERM U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405, Orsay Cedex, France
- Institut Curie, PSL Research University, 75006, Paris, France
| | - I Lamarre-Jouenne
- Laboratoire d'Optique et Biosciences, Ecole Polytechnique, CNRS, INSERM, Institut Polytechnique de Paris, Palaiseau, France
| | - J Monzac
- Laboratoire d'Optique Appliquée, ENSTA Paris, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau, France
| | - K Parodi
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748, Garching bei München, Germany
| | - A Patriarca
- Department of Radiation Oncology, Campus Universitaire, Institut Curie, Centre de Protonthérapie d'Orsay, PSL Research University, 91898, Orsay, France
| | - T Rösch
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748, Garching bei München, Germany
| | - J Schreiber
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748, Garching bei München, Germany
| | - L Tischendorf
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748, Garching bei München, Germany
| |
Collapse
|
2
|
Gesualdi F, de Marzi L, Dutreix M, Favaudon V, Fouillade C, Heinrich S. A multidisciplinary view of flash irradiation. Cancer Radiother 2024; 28:453-462. [PMID: 39343695 DOI: 10.1016/j.canrad.2024.07.003] [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: 04/15/2024] [Revised: 07/19/2024] [Accepted: 07/19/2024] [Indexed: 10/01/2024]
Abstract
The delivery of ultra-high dose rates of radiation, called flash irradiation or flash-RT, has emerged as a new modality of radiotherapy shaking up the paradigm of proportionality of effect and dose whatever the method of delivery of the radiation. The hallmark of flash-RT is healthy tissue sparing from the side effects of radiation without decrease of the antitumor efficiency in animal models. In this review we will define its specificities, the molecular mechanisms underlying the flash effect and the ongoing developments to bring this new modality to patient treatment.
Collapse
Affiliation(s)
- Flavia Gesualdi
- Institut Curie, Hospital Division, centre de protonthérapie d'Orsay, université Paris-Saclay, université PSL, centre universitaire, 91948 Orsay cedex, France
| | - Ludovic de Marzi
- Institut Curie, Hospital Division, centre de protonthérapie d'Orsay, université Paris-Saclay, université PSL, centre universitaire, 91948 Orsay cedex, France; Institut Curie, université PSL, université Paris-Saclay, Inserm Lito U1288, centre universitaire, 91898 Orsay, France
| | - Marie Dutreix
- Institut Curie, Research Division, Inserm U 1021-CNRS UMR 3347, université Paris-Saclay, université PSL, centre universitaire, 91401 Orsay cedex, France
| | - Vincent Favaudon
- Institut Curie, Research Division, Inserm U 1021-CNRS UMR 3347, université Paris-Saclay, université PSL, centre universitaire, 91401 Orsay cedex, France
| | - Charles Fouillade
- Institut Curie, Research Division, Inserm U 1021-CNRS UMR 3347, université Paris-Saclay, université PSL, centre universitaire, 91401 Orsay cedex, France
| | - Sophie Heinrich
- Institut Curie, Research Division, Inserm U 1021-CNRS UMR 3347, université Paris-Saclay, université PSL, centre universitaire, 91401 Orsay cedex, France.
| |
Collapse
|
3
|
Borghini A, Labate L, Piccinini S, Panaino CMV, Andreassi MG, Gizzi LA. FLASH Radiotherapy: Expectations, Challenges, and Current Knowledge. Int J Mol Sci 2024; 25:2546. [PMID: 38473799 PMCID: PMC10932202 DOI: 10.3390/ijms25052546] [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: 11/18/2023] [Revised: 02/12/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024] Open
Abstract
Major strides have been made in the development of FLASH radiotherapy (FLASH RT) in the last ten years, but there are still many obstacles to overcome for transfer to the clinic to become a reality. Although preclinical and first-in-human clinical evidence suggests that ultra-high dose rates (UHDRs) induce a sparing effect in normal tissue without modifying the therapeutic effect on the tumor, successful clinical translation of FLASH-RT depends on a better understanding of the biological mechanisms underpinning the sparing effect. Suitable in vitro studies are required to fully understand the radiobiological mechanisms associated with UHDRs. From a technical point of view, it is also crucial to develop optimal technologies in terms of beam irradiation parameters for producing FLASH conditions. This review provides an overview of the research progress of FLASH RT and discusses the potential challenges to be faced before its clinical application. We critically summarize the preclinical evidence and in vitro studies on DNA damage following UHDR irradiation. We also highlight the ongoing developments of technologies for delivering FLASH-compliant beams, with a focus on laser-driven plasma accelerators suitable for performing basic radiobiological research on the UHDR effects.
Collapse
Affiliation(s)
| | - Luca Labate
- Intense Laser Irradiation Laboratory (ILIL), CNR Istituto Nazionale di Ottica, 56124 Pisa, Italy; (L.L.); (S.P.); (C.M.V.P.); (L.A.G.)
| | - Simona Piccinini
- Intense Laser Irradiation Laboratory (ILIL), CNR Istituto Nazionale di Ottica, 56124 Pisa, Italy; (L.L.); (S.P.); (C.M.V.P.); (L.A.G.)
| | - Costanza Maria Vittoria Panaino
- Intense Laser Irradiation Laboratory (ILIL), CNR Istituto Nazionale di Ottica, 56124 Pisa, Italy; (L.L.); (S.P.); (C.M.V.P.); (L.A.G.)
| | | | - Leonida Antonio Gizzi
- Intense Laser Irradiation Laboratory (ILIL), CNR Istituto Nazionale di Ottica, 56124 Pisa, Italy; (L.L.); (S.P.); (C.M.V.P.); (L.A.G.)
| |
Collapse
|
4
|
Schulte R, Johnstone C, Boucher S, Esarey E, Geddes CGR, Kravchenko M, Kutsaev S, Loo BW, Méot F, Mustapha B, Nakamura K, Nanni EA, Obst-Huebl L, Sampayan SE, Schroeder CB, Sheng K, Snijders AM, Snively E, Tantawi SG, Van Tilborg J. Transformative Technology for FLASH Radiation Therapy. APPLIED SCIENCES (BASEL, SWITZERLAND) 2023; 13:5021. [PMID: 38240007 PMCID: PMC10795821 DOI: 10.3390/app13085021] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2024]
Abstract
The general concept of radiation therapy used in conventional cancer treatment is to increase the therapeutic index by creating a physical dose differential between tumors and normal tissues through precision dose targeting, image guidance, and radiation beams that deliver a radiation dose with high conformality, e.g., protons and ions. However, the treatment and cure are still limited by normal tissue radiation toxicity, with the corresponding side effects. A fundamentally different paradigm for increasing the therapeutic index of radiation therapy has emerged recently, supported by preclinical research, and based on the FLASH radiation effect. FLASH radiation therapy (FLASH-RT) is an ultra-high-dose-rate delivery of a therapeutic radiation dose within a fraction of a second. Experimental studies have shown that normal tissues seem to be universally spared at these high dose rates, whereas tumors are not. While dose delivery conditions to achieve a FLASH effect are not yet fully characterized, it is currently estimated that doses delivered in less than 200 ms produce normal-tissue-sparing effects, yet effectively kill tumor cells. Despite a great opportunity, there are many technical challenges for the accelerator community to create the required dose rates with novel compact accelerators to ensure the safe delivery of FLASH radiation beams.
Collapse
Affiliation(s)
- Reinhard Schulte
- Division of Biomedical Engineering Sciences, Loma Linda University, Loma Linda, CA 92350, USA
| | - Carol Johnstone
- Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
| | - Salime Boucher
- RadiaBeam Technologies, LLC, Santa Monica, CA 90404, USA
| | - Eric Esarey
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | | | | | - Sergey Kutsaev
- RadiaBeam Technologies, LLC, Santa Monica, CA 90404, USA
| | - Billy W. Loo
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - François Méot
- Brookhaven National Laboratory, Upton, NY 11973, USA
| | | | - Kei Nakamura
- Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Emilio A. Nanni
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | | | - Stephen E. Sampayan
- Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
- Opcondys, Inc., Manteca, CA 95336, USA
| | | | - Ke Sheng
- Department of Radiation Oncology, University of California, San Francisco, CA 94115, USA
| | | | - Emma Snively
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Sami G. Tantawi
- SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | | |
Collapse
|
5
|
Thompson SJ, Prise KM, McMahon SJ. Investigating the potential contribution of inter-track interactions within ultra-high dose-rate proton therapy. Phys Med Biol 2023; 68. [PMID: 36731135 DOI: 10.1088/1361-6560/acb88a] [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: 09/15/2022] [Accepted: 02/01/2023] [Indexed: 02/04/2023]
Abstract
Objective. Laser-accelerated protons offer an alternative delivery mechanism for proton therapy. This technique delivers dose-rates of ≥109Gy s-1, many orders of magnitude greater than used clinically. Such ultra-high dose-rates reduce delivery time to nanoseconds, equivalent to the lifetime of reactive chemical species within a biological medium. This leads to the possibility of inter-track interactions between successive protons within a pulse, potentially altering the yields of damaging radicals if they are in sufficient spatial proximity. This work investigates the temporal evolution of chemical species for a range of proton energies and doses to quantify the circumstances required for inter-track interactions, and determine any relevance within ultra-high dose-rate proton therapy.Approach. The TOPAS-nBio Monte Carlo toolkit was used to investigate possible inter-track interactions. Firstly, protons between 0.5 and 100 MeV were simulated to record the radial track dimensions throughout the chemical stage from 1 ps to 1μs. Using the track areas, the geometric probability of track overlap was calculated for various exposures and timescales. A sample of irradiations were then simulated in detail to compare any change in chemical yields for independently and instantaneously delivered tracks, and validate the analytic model.Main results. Track overlap for a clinical 2 Gy dose was negligible for biologically relevant timepoints for all energies. Overlap probability increased with time after irradiation, proton energy and dose, with a minimum 23 Gy dose required before significant track overlap occurred. Simulating chemical interactions confirmed these results with no change in radical yields seen up to 8 Gy for independently and instantaneously delivered tracks.Significance. These observations suggest that the spatial separation between incident protons is too large for physico-chemical inter-track interactions, regardless of the delivery time, indicating such interactions would not play a role in any potential changes in biological response between laser-accelerated and conventional proton therapy.
Collapse
Affiliation(s)
- Shannon J Thompson
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, United Kingdom
| | - Kevin M Prise
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, United Kingdom
| | - Stephen J McMahon
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, United Kingdom
| |
Collapse
|
6
|
Chaudhary P, Milluzzo G, McIlvenny A, Ahmed H, McMurray A, Maiorino C, Polin K, Romagnani L, Doria D, McMahon SJ, Botchway SW, Rajeev PP, Prise KM, Borghesi M. Cellular irradiations with laser-driven carbon ions at ultra-high dose rates. Phys Med Biol 2023; 68. [PMID: 36625355 DOI: 10.1088/1361-6560/aca387] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 11/16/2022] [Indexed: 01/11/2023]
Abstract
Objective.Carbon is an ion species of significant radiobiological interest, particularly in view of its use in cancer radiotherapy, where its large Relative Biological Efficiency is often exploited to overcome radio resistance. A growing interest in highly pulsed carbon delivery has arisen in the context of the development of the FLASH radiotherapy approach, with recent studies carried out at dose rates of 40 Gy s-1. Laser acceleration methods, producing ultrashort ion bursts, can now enable the delivery of Gy-level doses of carbon ions at ultra-high dose rates (UHDRs), exceeding 109Gy s-1. While studies at such extreme dose rate have been carried out so far using low LET particles such as electrons and protons, the radiobiology of high-LET, UHDR ions has not yet been explored. Here, we report the first application of laser-accelerated carbon ions generated by focussing 1020W cm-2intense lasers on 10-25 nm carbon targets, to irradiate radioresistant patient-derived Glioblastoma stem like cells (GSCs).Approach.We exposed GSCs to 1 Gy of 9.5 ± 0.5 MeV/n carbon ions delivered in a single ultra-short (∼400-picosecond) pulse, at a dose rate of 2 × 109Gy s-1, generated using the ASTRA GEMINI laser of the Central Laser Facility at the Rutherford Appleton Laboratory, Didcot, Oxfordshire, UK. We quantified carbon ion-induced DNA double strand break (DSB) damage using the 53BP1 foci formation assay and used 225 kVp x-rays as a reference radiation.Main Results.Laser-accelerated carbon ions induced complex DNA DSB damage, as seen through persistent 53BP1 foci (11.5 ± 0.4 foci/cell/Gy) at 24 h and significantly larger foci (1.69 ± 0.07μm2) than x-rays induced ones (0.63 ± 0.02μm2). The relative foci induction value for laser-driven carbon ions relative to conventional x-rays was 3.2 ± 0.3 at 24 h post-irradiation also confirming the complex nature of the induced damage.Significance.Our study demonstrates the feasibility of radiobiology investigations at unprecedented dose rates using laser-accelerated high-LET carbon ions in clinically relevant models.
Collapse
Affiliation(s)
- Pankaj Chaudhary
- The Patrick G. Johnston Centre for Cancer Research, Queen's University Belfast, Lisburn Road, Belfast, BT9 7AE, Northern Ireland, United Kingdom.,Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom
| | - Giuliana Milluzzo
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom.,Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare,, via S Sofia 62, I-95123 Catania, Sicily, Italy
| | - Aodhan McIlvenny
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom
| | - Hamad Ahmed
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom.,Experimental Science Group, Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxford, OX11 0QX, England, United Kingdom
| | - Aaron McMurray
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom
| | - Carla Maiorino
- The Patrick G. Johnston Centre for Cancer Research, Queen's University Belfast, Lisburn Road, Belfast, BT9 7AE, Northern Ireland, United Kingdom.,Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare,, via S Sofia 62, I-95123 Catania, Sicily, Italy.,Extreme Light Infrastructure (ELI-NP) and Horia Hulubei National Institute for R & D in Physics and Nuclear Engineering (IFIN-HH), Str. Reactorului No. 30, 077125 Bucharest, Magurele, Romania.,University College Cork, College of Medicine and Health, Discipline of Diagnostic Radiography and Radiation Therapy, Brookfield Health Sciences Complex, Brookfield College Road, T12AK54, Cork, United Kingdom
| | - Kathryn Polin
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom
| | - Lorenzo Romagnani
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom.,Laboratoire LULI, École Polytechnique, Route de Saclay, F-91128 Palaiseau, Paris, France
| | - Domenico Doria
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom.,Extreme Light Infrastructure (ELI-NP) and Horia Hulubei National Institute for R & D in Physics and Nuclear Engineering (IFIN-HH), Str. Reactorului No. 30, 077125 Bucharest, Magurele, Romania
| | - Stephen J McMahon
- The Patrick G. Johnston Centre for Cancer Research, Queen's University Belfast, Lisburn Road, Belfast, BT9 7AE, Northern Ireland, United Kingdom
| | - Stanley W Botchway
- Research Complex at Harwell & Central Laser facility, Rutherford Appleton Laboratory, Didcot, Oxford, OX11 0QX, England, United Kingdom
| | - Pattathil P Rajeev
- Experimental Science Group, Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxford, OX11 0QX, England, United Kingdom
| | - Kevin M Prise
- The Patrick G. Johnston Centre for Cancer Research, Queen's University Belfast, Lisburn Road, Belfast, BT9 7AE, Northern Ireland, United Kingdom
| | - Marco Borghesi
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, Northern Ireland, United Kingdom
| |
Collapse
|
7
|
Chaudhary P, Gwynne DC, Odlozilik B, McMurray A, Milluzzo G, Maiorino C, Doria D, Ahmed H, Romagnani L, Alejo A, Padda H, Green J, Carroll D, Booth N, McKenna P, Kar S, Petringa G, Catalano R, Cammarata FP, Cirrone GAP, McMahon SJ, Prise KM, Borghesi M. Development of a portable hypoxia chamber for ultra-high dose rate laser-driven proton radiobiology applications. Radiat Oncol 2022; 17:77. [PMID: 35428301 PMCID: PMC9013042 DOI: 10.1186/s13014-022-02024-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 03/03/2022] [Indexed: 11/22/2022] Open
Abstract
Background There is currently significant interest in assessing the role of oxygen in the radiobiological effects at ultra-high dose rates. Oxygen modulation is postulated to play a role in the enhanced sparing effect observed in FLASH radiotherapy, where particles are delivered at 40–1000 Gy/s. Furthermore, the development of laser-driven accelerators now enables radiobiology experiments in extreme regimes where dose rates can exceed 109 Gy/s, and predicted oxygen depletion effects on cellular response can be tested. Access to appropriate experimental enviroments, allowing measurements under controlled oxygenation conditions, is a key requirement for these studies. We report on the development and application of a bespoke portable hypoxia chamber specifically designed for experiments employing laser-driven sources, but also suitable for comparator studies under FLASH and conventional irradiation conditions. Materials and methods We used oxygen concentration measurements to test the induction of hypoxia and the maintenance capacity of the chambers. Cellular hypoxia induction was verified using hypoxia inducible factor-1α immunostaining. Calibrated radiochromic films and GEANT-4 simulations verified the dosimetry variations inside and outside the chambers. We irradiated hypoxic human skin fibroblasts (AG01522B) cells with laser-driven protons, conventional protons and reference 225 kVp X-rays to quantify DNA DSB damage and repair under hypoxia. We further measured the oxygen enhancement ratio for cell survival after X-ray exposure in normal fibroblast and radioresistant patient- derived GBM stem cells. Results Oxygen measurements showed that our chambers maintained a radiobiological hypoxic environment for at least 45 min and pathological hypoxia for up to 24 h after disconnecting the chambers from the gas supply. We observed a significant reduction in the 53BP1 foci induced by laser-driven protons, conventional protons and X-rays in the hypoxic cells compared to normoxic cells at 30 min post-irradiation. Under hypoxic irradiations, the Laser-driven protons induced significant residual DNA DSB damage in hypoxic AG01522B cells compared to the conventional dose rate protons suggesting an important impact of these extremely high dose-rate exposures. We obtained an oxygen enhancement ratio (OER) of 2.1 ± 0.1 and 2.5 ± 0.1 respectively for the AG01522B and patient-derived GBM stem cells for X-ray irradiation using our hypoxia chambers. Conclusion We demonstrated the design and application of portable hypoxia chambers for studying cellular radiobiological endpoints after exposure to laser-driven protons at ultra-high dose, conventional protons and X-rays. Suitable levels of reduced oxygen concentration could be maintained in the absence of external gassing to quantify hypoxic effects. The data obtained provided indication of an enhanced residual DNA DSB damage under hypoxic conditions at ultra-high dose rate compared to the conventional protons or X-rays. Supplementary Information The online version contains supplementary material available at 10.1186/s13014-022-02024-3.
Collapse
|
8
|
Friedl AA, Prise KM, Butterworth KT, Montay-Gruel P, Favaudon V. Radiobiology of the FLASH effect. Med Phys 2022; 49:1993-2013. [PMID: 34426981 DOI: 10.1002/mp.15184] [Citation(s) in RCA: 102] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 12/17/2022] Open
Abstract
Radiation exposures at ultrahigh dose rates (UHDRs) at several orders of magnitude greater than in current clinical radiotherapy (RT) have been shown to manifest differential radiobiological responses compared to conventional (CONV) dose rates. This has led to studies investigating the application of UHDR for therapeutic advantage (FLASH-RT) that have gained significant interest since the initial discovery in 2014 that demonstrated reduced lung toxicity with equivalent levels of tumor control compared with conventional dose-rate RT. Many subsequent studies have demonstrated the potential protective role of FLASH-RT in normal tissues, yet the underlying molecular and cellular mechanisms of the FLASH effect remain to be fully elucidated. Here, we summarize the current evidence of the FLASH effect and review FLASH-RT studies performed in preclinical models of normal tissue response. To critically examine the underlying biological mechanisms of responses to UHDR radiation exposures, we evaluate in vitro studies performed with normal and tumor cells. Differential responses to UHDR versus CONV irradiation recurrently involve reduced inflammatory processes and differential expression of pro- and anti-inflammatory genes. In addition, frequently reduced levels of DNA damage or misrepair products are seen after UHDR irradiation. So far, it is not clear what signal elicits these differential responses, but there are indications for involvement of reactive species. Different susceptibility to FLASH effects observed between normal and tumor cells may result from altered metabolic and detoxification pathways and/or repair pathways used by tumor cells. We summarize the current theories that may explain the FLASH effect and highlight important research questions that are key to a better mechanistic understanding and, thus, the future implementation of FLASH-RT in the clinic.
Collapse
Affiliation(s)
- Anna A Friedl
- Department of Radiation Oncology, University Hospital, LMU Munich, Munich, Germany
| | - Kevin M Prise
- Patrick G. Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Karl T Butterworth
- Patrick G. Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Pierre Montay-Gruel
- Department of Radiation Oncology, University of California at Irvine, Irvine, California, USA
| | - Vincent Favaudon
- Institut Curie, Inserm U 1021-CNRS UMR 3347, Université Paris-Saclay, PSL Research University, Centre Universitaire, Orsay, France
| |
Collapse
|
9
|
Experimental Setup for Irradiation of Cell Cultures at L2A2. QUANTUM BEAM SCIENCE 2022. [DOI: 10.3390/qubs6010010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Laser–plasma proton sources and their applications to preclinical research has become a very active field of research in recent years. In addition to their small dimensions as compared to classical ion accelerators, they offer the possibility to study the biological effects of ultra-short particle bunches and the correspondingly high dose rates. We report on the design of an experimental setup for the irradiation of cell cultures at the L2A2 laboratory at the University of Santiago de Compostela, making use of a 1.2 J Ti: Sapphire laser with a 10 Hz repetition rate. Our setup comprises a proton energy separator consisting of two antiparallel magnetic fields realized by a set of permanent magnets. It allows for selecting a narrow energy window around an adaptable design value of 5 MeV out of the initially broad spectrum typical for Target Normal Sheath Acceleration (TNSA). At the same time, unwanted electrons and X-rays are segregated from the protons. This part of the setup is located inside the target vessel of the L2A2 laser. A subsequent vacuum flange sealed with a thin kapton window allows for particle passage to external sample irradiation. A combination of passive detector materials and real-time monitors is applied for measurement of the deposited radiation dose. A critical point of this interdisciplinary project is the manipulation of biological samples under well-controlled, sterile conditions. Cell cultures are prepared in sealed flasks with an ultra-thin entrance window and analysed at the nearby Fundación Pública Galega Medicina Xenómica and IDIS. The first trials will be centred at the quantification of DNA double-strand breaks as a function of radiation dose.
Collapse
|
10
|
Bin J, Obst-Huebl L, Mao JH, Nakamura K, Geulig LD, Chang H, Ji Q, He L, De Chant J, Kober Z, Gonsalves AJ, Bulanov S, Celniker SE, Schroeder CB, Geddes CGR, Esarey E, Simmons BA, Schenkel T, Blakely EA, Steinke S, Snijders AM. A new platform for ultra-high dose rate radiobiological research using the BELLA PW laser proton beamline. Sci Rep 2022; 12:1484. [PMID: 35087083 PMCID: PMC8795353 DOI: 10.1038/s41598-022-05181-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 01/04/2022] [Indexed: 12/15/2022] Open
Abstract
Radiotherapy is the current standard of care for more than 50% of all cancer patients. Improvements in radiotherapy (RT) technology have increased tumor targeting and normal tissue sparing. Radiations at ultra-high dose rates required for FLASH-RT effects have sparked interest in potentially providing additional differential therapeutic benefits. We present a new experimental platform that is the first one to deliver petawatt laser-driven proton pulses of 2 MeV energy at 0.2 Hz repetition rate by means of a compact, tunable active plasma lens beamline to biological samples. Cell monolayers grown over a 10 mm diameter field were exposed to clinically relevant proton doses ranging from 7 to 35 Gy at ultra-high instantaneous dose rates of 107 Gy/s. Dose-dependent cell survival measurements of human normal and tumor cells exposed to LD protons showed significantly higher cell survival of normal-cells compared to tumor-cells for total doses of 7 Gy and higher, which was not observed to the same extent for X-ray reference irradiations at clinical dose rates. These findings provide preliminary evidence that compact LD proton sources enable a new and promising platform for investigating the physical, chemical and biological mechanisms underlying the FLASH effect.
Collapse
Affiliation(s)
- Jianhui Bin
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-Intense Laser Science, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China
| | - Lieselotte Obst-Huebl
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Jian-Hua Mao
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Kei Nakamura
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Laura D Geulig
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- LMU Munich, Geschwister-Scholl-Platz 1, 80539, Munich, Germany
| | - Hang Chang
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Qing Ji
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Li He
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Jared De Chant
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Michigan State University, East Lansing, MI, 48824, USA
| | - Zachary Kober
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Anthony J Gonsalves
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Stepan Bulanov
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Susan E Celniker
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Carl B Schroeder
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Cameron G R Geddes
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Eric Esarey
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Blake A Simmons
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Thomas Schenkel
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Eleanor A Blakely
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Sven Steinke
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Marvel Fusion GmbH, Blumenstrasse 28, 80331, Munich, Germany
| | - Antoine M Snijders
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
| |
Collapse
|
11
|
Behrends C, Bäumer C, Verbeek N, Ehlert J, Prasad R, Wulff J, Lühr A, Timmermann B. Technical note: Providing proton fields down to the few-MeV level at clinical pencil beam scanning facilities for radiobiological experiments. Med Phys 2021; 49:666-674. [PMID: 34855985 DOI: 10.1002/mp.15388] [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: 08/23/2021] [Revised: 11/03/2021] [Accepted: 11/18/2021] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The adequate performance of radiobiological experiments using clinical proton beams typically requires substantial preparations to provide the appropriate setup for specific experiments. Providing radiobiologically interesting low-energy protons is a particular challenge, due to various physical effects that become more pronounced with larger absorber thickness and smaller proton energy. This work demonstrates the generation of decelerated low-energy protons from a clinical proton beam. METHODS Monte Carlo simulations of proton energy spectra were performed for energy absorbers with varying thicknesses to reduce the energy of the clinical proton beam down to the few-MeV level corresponding to μ m-ranges. In this way, a setup with an optimum thickness of the absorber with a maximum efficiency of the proton fluence for the provisioning of low-energy protons is supposed to be found. For the specific applications of 2.5-3.3 MeV protons and α -particle range equivalent protons, the relative depth dose was measured and simulated together with the dose-averaged linear energy transfer (LETd) distribution. RESULTS The resulting energy spectra from Monte Carlo simulations indicate an optimal absorber thickness for providing low-energy protons with maximum efficiency of proton fluence at an user-requested energy range for experiments. For instance, providing energies lower than 5 MeV, an energy spectrum with a relative total efficiency of 38.6 % to the initial spectrum was obtained with the optimal setup. The measurements of the depth dose, compared to the Monte Carlo simulations, showed that the dosimetry of low-energy protons works and protons with high LETd down to the range of α -particles can be produced. CONCLUSIONS This work provides a method for generating all clinically and radiobiologically relevant energies - especially down to the few-MeV level - at one clinical facility with pencil beam scanning. Thereby, it enables radiobiological experiments under environmentally uniform conditions.
Collapse
Affiliation(s)
- Carina Behrends
- West German Proton Therapy Centre Essen (WPE), 45147 Essen, Germany.,Department of Physics, TU Dortmund University, 44227 Dortmund, Germany.,West German Cancer Centre (WTZ), University Hospital Essen, 45147 Essen, Germany
| | - Christian Bäumer
- West German Proton Therapy Centre Essen (WPE), 45147 Essen, Germany.,Department of Physics, TU Dortmund University, 44227 Dortmund, Germany.,West German Cancer Centre (WTZ), University Hospital Essen, 45147 Essen, Germany.,German Cancer Consortium (DKTK), 69120 Heidelberg, Germany
| | - Nico Verbeek
- West German Proton Therapy Centre Essen (WPE), 45147 Essen, Germany.,West German Cancer Centre (WTZ), University Hospital Essen, 45147 Essen, Germany.,Faculty of Medicine, University of Duisburg-Essen, 45147 Essen, Germany
| | - Jens Ehlert
- Institute for Laser and Plasma Physics, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany.,Department of Haematology, Oncology and Clinical Immunology, Heinrich-Heine-University Düsseldorf, Medical Faculty, 40225 Düsseldorf, Germany
| | - Rajendra Prasad
- Institute for Laser and Plasma Physics, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Jörg Wulff
- West German Proton Therapy Centre Essen (WPE), 45147 Essen, Germany.,West German Cancer Centre (WTZ), University Hospital Essen, 45147 Essen, Germany
| | - Armin Lühr
- Department of Physics, TU Dortmund University, 44227 Dortmund, Germany
| | - Beate Timmermann
- West German Proton Therapy Centre Essen (WPE), 45147 Essen, Germany.,West German Cancer Centre (WTZ), University Hospital Essen, 45147 Essen, Germany.,German Cancer Consortium (DKTK), 69120 Heidelberg, Germany.,Faculty of Medicine, University of Duisburg-Essen, 45147 Essen, Germany.,Department of Particle Therapy, University Hospital Essen, 45147 Essen, Germany
| |
Collapse
|
12
|
Dosimetric Optimization of a Laser-Driven Irradiation Facility Using the G4-ELIMED Application. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11219823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
ELIMED has been developed and installed at ELI beamlines as a part of the ELIMAIA beamline to transport, monitor, and use laser-driven ion beams suitable for multidisciplinary applications, including biomedical ones. This paper aims to investigate the feasibility to perform radiobiological experiments using laser-accelerated proton beams with intermediate energies (up to 30 MeV). To reach this goal, we simulate a proton source based on experimental data like the ones expected to be available in the first phase of ELIMED commissioning by using the G4-ELIMED application (an application based on the Geant4 toolkit that simulates the full ELIMED beamline). This allows the study of transmission efficiency and the final characteristics of the proton beam at the sample irradiation point. The Energy Selector System is used as an active energy modulator to obtain the desired beam features in a relatively short irradiation time (around 6 min). Furthermore, we demonstrate the capability of the beamline to filter out other ion contaminants, typically co-accelerated in a laser-plasma environment. These results can be considered as a detailed feasibility study for the use of ELIMED for various user applications such as radiobiological experiments with ultrahigh dose rate proton beams.
Collapse
|
13
|
Ronga MG, Cavallone M, Patriarca A, Leite AM, Loap P, Favaudon V, Créhange G, De Marzi L. Back to the Future: Very High-Energy Electrons (VHEEs) and Their Potential Application in Radiation Therapy. Cancers (Basel) 2021; 13:4942. [PMID: 34638424 PMCID: PMC8507836 DOI: 10.3390/cancers13194942] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/14/2022] Open
Abstract
The development of innovative approaches that would reduce the sensitivity of healthy tissues to irradiation while maintaining the efficacy of the treatment on the tumor is of crucial importance for the progress of the efficacy of radiotherapy. Recent methodological developments and innovations, such as scanned beams, ultra-high dose rates, and very high-energy electrons, which may be simultaneously available on new accelerators, would allow for possible radiobiological advantages of very short pulses of ultra-high dose rate (FLASH) therapy for radiation therapy to be considered. In particular, very high-energy electron (VHEE) radiotherapy, in the energy range of 100 to 250 MeV, first proposed in the 2000s, would be particularly interesting both from a ballistic and biological point of view for the establishment of this new type of irradiation technique. In this review, we examine and summarize the current knowledge on VHEE radiotherapy and provide a synthesis of the studies that have been published on various experimental and simulation works. We will also consider the potential for VHEE therapy to be translated into clinical contexts.
Collapse
Affiliation(s)
- Maria Grazia Ronga
- Centre de Protonthérapie d’Orsay, Department of Radiation Oncology, Campus Universitaire, Institut Curie, PSL Research University, 91898 Orsay, France; (M.G.R.); (M.C.); (A.P.); (A.M.L.); (P.L.); (G.C.)
- Thales AVS Microwave & Imaging Sub-Systems, 78141 Vélizy-Villacoublay, France
| | - Marco Cavallone
- Centre de Protonthérapie d’Orsay, Department of Radiation Oncology, Campus Universitaire, Institut Curie, PSL Research University, 91898 Orsay, France; (M.G.R.); (M.C.); (A.P.); (A.M.L.); (P.L.); (G.C.)
| | - Annalisa Patriarca
- Centre de Protonthérapie d’Orsay, Department of Radiation Oncology, Campus Universitaire, Institut Curie, PSL Research University, 91898 Orsay, France; (M.G.R.); (M.C.); (A.P.); (A.M.L.); (P.L.); (G.C.)
| | - Amelia Maia Leite
- Centre de Protonthérapie d’Orsay, Department of Radiation Oncology, Campus Universitaire, Institut Curie, PSL Research University, 91898 Orsay, France; (M.G.R.); (M.C.); (A.P.); (A.M.L.); (P.L.); (G.C.)
- INSERM LITO U1288, Campus Universitaire, Institut Curie, PSL Research University, University Paris Saclay, 91898 Orsay, France
| | - Pierre Loap
- Centre de Protonthérapie d’Orsay, Department of Radiation Oncology, Campus Universitaire, Institut Curie, PSL Research University, 91898 Orsay, France; (M.G.R.); (M.C.); (A.P.); (A.M.L.); (P.L.); (G.C.)
| | - Vincent Favaudon
- INSERM U 1021-CNRS UMR 3347, Campus Universitaire, Institut Curie, PSL Research University, University Paris Saclay, 91898 Orsay, France;
| | - Gilles Créhange
- Centre de Protonthérapie d’Orsay, Department of Radiation Oncology, Campus Universitaire, Institut Curie, PSL Research University, 91898 Orsay, France; (M.G.R.); (M.C.); (A.P.); (A.M.L.); (P.L.); (G.C.)
| | - Ludovic De Marzi
- Centre de Protonthérapie d’Orsay, Department of Radiation Oncology, Campus Universitaire, Institut Curie, PSL Research University, 91898 Orsay, France; (M.G.R.); (M.C.); (A.P.); (A.M.L.); (P.L.); (G.C.)
- INSERM LITO U1288, Campus Universitaire, Institut Curie, PSL Research University, University Paris Saclay, 91898 Orsay, France
| |
Collapse
|
14
|
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: 2.3] [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]
|
15
|
Han J, Mei Z, Lu C, Qian J, Liang Y, Sun X, Pan Z, Kong D, Xu S, Liu Z, Gao Y, Qi G, Shou Y, Chen S, Cao Z, Zhao Y, Lin C, Zhao Y, Geng Y, Chen J, Yan X, Ma W, Yang G. Ultra-High Dose Rate FLASH Irradiation Induced Radio-Resistance of Normal Fibroblast Cells Can Be Enhanced by Hypoxia and Mitochondrial Dysfunction Resulting From Loss of Cytochrome C. Front Cell Dev Biol 2021; 9:672929. [PMID: 33996831 PMCID: PMC8121317 DOI: 10.3389/fcell.2021.672929] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/08/2021] [Indexed: 01/15/2023] Open
Abstract
Ultra-high dose rate FLASH irradiation (FLASH-IR) has got extensive attention since it may provide better protection on normal tissues while maintain tumor killing effect compared with conventional dose rate irradiation. The FLASH-IR induced protection effect on normal tissues is exhibited as radio-resistance of the irradiated normal cells, and is suggested to be related to oxygen depletion. However, the detailed cell death profile and pathways are still unclear. Presently normal mouse embryonic fibroblast cells were FLASH irradiated (∼109 Gy/s) at the dose of ∼10–40 Gy in hypoxic and normoxic condition, with ultra-fast laser-generated particles. The early apoptosis, late apoptosis and necrosis of cells were detected and analyzed at 6, 12, and 24 h post FLASH-IR. The results showed that FLASH-IR induced significant early apoptosis, late apoptosis and necrosis in normal fibroblast cells, and the apoptosis level increased with time, in either hypoxic or normoxic conditions. In addition, the proportion of early apoptosis, late apoptosis and necrosis were significantly lower in hypoxia than that of normoxia, indicating that radio-resistance of normal fibroblast cells under FLASH-IR can be enhanced by hypoxia. To further investigate the apoptosis related profile and potential pathways, mitochondria dysfunction cells resulting from loss of cytochrome c (cyt c–/–) were also irradiated. The results showed that compared with irradiated normal cells (cyt c+/+), the late apoptosis and necrosis but not early apoptosis proportions of irradiated cyt c–/– cells were significant decreased in both hypoxia and normoxia, indicating mitochondrial dysfunction increased radio-resistance of FLASH irradiated cells. Taken together, to our limited knowledge, this is the first report shedding light on the death profile and pathway of normal and cyt c–/– cells under FLASH-IR in hypoxic and normoxic circumstances, which might help us improve the understanding of the FLASH-IR induced protection effect in normal cells, and thus might potentially help to optimize the future clinical FLASH treatment.
Collapse
Affiliation(s)
- Jintao Han
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Zhusong Mei
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Chunyang Lu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Jing Qian
- Teaching and Research Section of Nuclear Medicine, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Yulan Liang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Xiaoyi Sun
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Zhuo Pan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Defeng Kong
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Shirui Xu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Zhipeng Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Ying Gao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Guijun Qi
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Yinren Shou
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Shiyou Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Zhengxuan Cao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Ye Zhao
- Teaching and Research Section of Nuclear Medicine, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Chen Lin
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Yanying Zhao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Yixing Geng
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Jiaer Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Xueqing Yan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
| | - Wenjun Ma
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| | - Gen Yang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics and CAPT, Peking University, Beijing, China
| |
Collapse
|
16
|
Yang G, Lu C, Mei Z, Sun X, Han J, Qian J, Liang Y, Pan Z, Kong D, Xu S, Liu Z, Gao Y, Qi G, Shou Y, Chen S, Cao Z, Zhao Y, Lin C, Zhao Y, Geng Y, Ma W, Yan X. Association of Cancer Stem Cell Radio-Resistance Under Ultra-High Dose Rate FLASH Irradiation With Lysosome-Mediated Autophagy. Front Cell Dev Biol 2021; 9:672693. [PMID: 33996830 PMCID: PMC8116574 DOI: 10.3389/fcell.2021.672693] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/06/2021] [Indexed: 12/03/2022] Open
Abstract
Cancer stem cell (CSC) is thought to be the major cause of radio-resistance and relapse post radiotherapy (RT). Recently ultra-high dose rate “FLASH-RT” evokes great interest for its decreasing normal tissue damages while maintaining tumor responses compared with conventional dose rate RT. However, the killing effect and mechanism of FLASH irradiation (FLASH-IR) on CSC and normal cancer cell are still unclear. Presently the radiation induced death profile of CSC and normal cancer cell were studied. Cells were irradiated with FLASH-IR (∼109 Gy/s) at the dose of 6–9 Gy via laser-accelerated nanosecond particles. Then the ratio of apoptosis, pyroptosis and necrosis were determined. The results showed that FLASH-IR can induce apoptosis, pyroptosis and necrosis in both CSC and normal cancer cell with different ratios. And CSC was more resistant to radiation than normal cancer cell under FLASH-IR. Further experiments tracing lysosome and autophagy showed that CSCs had higher levels of lysosome and autophagy. Taken together, our results suggested that the radio-resistance of CSC may associate with the increase of lysosome-mediated autophagy, and the decrease of apoptosis, necrosis and pyroptosis. To our limited knowledge, this is the first report shedding light on the killing effects and death pathways of CSC and normal cancer cell under FLASH-IR. By clarifying the death pathways of CSC and normal cancer cell under FLASH-IR, it may help us improve the understanding of the radio-resistance of CSC and thus help to optimize the future clinical FLASH treatment plan.
Collapse
Affiliation(s)
- Gen Yang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Chunyang Lu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Zhusong Mei
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Xiaoyi Sun
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Jintao Han
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Jing Qian
- Teaching and Research Section of Nuclear Medicine, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Yulan Liang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Zhuo Pan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Defeng Kong
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Shirui Xu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Zhipeng Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Ying Gao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Guijun Qi
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Yinren Shou
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Shiyou Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Zhengxuan Cao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Ye Zhao
- Teaching and Research Section of Nuclear Medicine, School of Basic Medical Sciences, Anhui Medical University, Hefei, China
| | - Chen Lin
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Yanying Zhao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Yixing Geng
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Wenjun Ma
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China
| | - Xueqing Yan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, CAPT, Peking University, Beijing, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
| |
Collapse
|
17
|
Schüller A, Heinrich S, Fouillade C, Subiel A, De Marzi L, Romano F, Peier P, Trachsel M, Fleta C, Kranzer R, Caresana M, Salvador S, Busold S, Schönfeld A, McEwen M, Gomez F, Solc J, Bailat C, Linhart V, Jakubek J, Pawelke J, Borghesi M, Kapsch RP, Knyziak A, Boso A, Olsovcova V, Kottler C, Poppinga D, Ambrozova I, Schmitzer CS, Rossomme S, Vozenin MC. The European Joint Research Project UHDpulse – Metrology for advanced radiotherapy using particle beams with ultra-high pulse dose rates. Phys Med 2020; 80:134-150. [DOI: 10.1016/j.ejmp.2020.09.020] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 08/17/2020] [Accepted: 09/23/2020] [Indexed: 02/08/2023] Open
|
18
|
[Radiation-oncology horizon 2030: From microbiota to plasma laser]. Cancer Radiother 2020; 24:744-750. [PMID: 32861611 DOI: 10.1016/j.canrad.2020.06.023] [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: 06/08/2020] [Revised: 06/17/2020] [Accepted: 06/19/2020] [Indexed: 11/20/2022]
Abstract
Advances in physical, technological and biological fields have made radiation oncology a discipline in continual evolution. New current research areas could be implemented in the clinic in the near future. In this review in the form of several interviews, various promising themes for our specialty are described such as the gut microbiota, tumor organoids (or avatar), artificial intelligence, connected therapies, nanotechnologies and plasma laser. The individual prediction of the best therapeutic index combined with the integration of new technologies will ideally allow highly personalized treatment of patients receiving radiation therapy.
Collapse
|
19
|
De Marzi L, Patriarca A, Scher N, Thariat J, Vidal M. Exploiting the full potential of proton therapy: An update on the specifics and innovations towards spatial or temporal optimisation of dose delivery. Cancer Radiother 2020; 24:691-698. [PMID: 32753235 DOI: 10.1016/j.canrad.2020.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/07/2020] [Accepted: 06/09/2020] [Indexed: 02/07/2023]
Abstract
Prescription and delivery of protons are somewhat different compared to photons and may influence outcomes (tumour control and toxicity). These differences should be taken into account to fully exploit the clinical potential of proton therapy. Innovations in proton therapy treatment are also required to widen the therapeutic window and determine appropriate populations of patients that would benefit from new treatments. Therefore, strategies are now being developed to reduce side effects to critical normal tissues using alternative treatment configurations and new spatial or temporal-driven optimisation approaches. Indeed, spatiotemporal optimisation (based on flash, proton minibeam radiation therapy or hypofractionated delivery methods) has been gaining some attention in proton therapy as a mean of improving (biological and physical) dose distribution. In this short review, the main differences in planning and delivery between protons and photons, as well as some of the latest developments and methodological issues (in silico modelling) related to providing scientific evidence for these new techniques will be discussed.
Collapse
Affiliation(s)
- L De Marzi
- Institut Curie, centre de protonthérapie d'Orsay, campus universitaire, bâtiment 101, 91898 Orsay, France; Université PSL (Paris Sciences & Lettres), 60, rue Mazarine, 75006 Paris, France; Université Paris-Saclay, route de l'Orme-aux-Merisiers, RD 128, 91190 Saint-Aubin, France; Inserm U1021, centre universitaire, bâtiment 110, rue Henri-Becquerel, 91405 Orsay cedex, France; CNRS, UMR 3347, centre universitaire, bâtiment 110, rue Henri-Becquerel, 91405 Orsay cedex, France.
| | - A Patriarca
- Institut Curie, centre de protonthérapie d'Orsay, campus universitaire, bâtiment 101, 91898 Orsay, France; Université PSL (Paris Sciences & Lettres), 60, rue Mazarine, 75006 Paris, France
| | - N Scher
- Institut Curie, centre de protonthérapie d'Orsay, campus universitaire, bâtiment 101, 91898 Orsay, France; Université PSL (Paris Sciences & Lettres), 60, rue Mazarine, 75006 Paris, France
| | - J Thariat
- Service de radiothérapie oncologique, centre François-Baclesse, 3, avenue General-Harris, 14000 Caen, France; Laboratoire de physique corpusculaire de Caen, 6, boulevard du Maréchal-Juin, 14050 Caen cedex, France; Institut national de physique nucléaire et physique des particules (IN2P3), 6, boulevard du Maréchal-Juin, 14050 Caen cedex, France; EnsiCaen, 6, boulevard du Maréchal-Juin, 14050 Caen cedex, France; CNRS, UMR6534, 6, boulevard du Maréchal-Juin, 14050 Caen cedex, France; Unicaen, 6, boulevard du Maréchal-Juin, 14050 Caen cedex, France; Normandie Université, 6, boulevard du Maréchal-Juin, 14050 Caen cedex, France
| | - M Vidal
- Centre Antoine-Lacassagne, 33, avenue Valombrose, 06000 Nice, France
| |
Collapse
|
20
|
Cavallone M, Flacco A, Malka V. Shaping of a laser-accelerated proton beam for radiobiology applications via genetic algorithm. Phys Med 2019; 67:123-131. [PMID: 31706148 DOI: 10.1016/j.ejmp.2019.10.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 09/20/2019] [Accepted: 10/13/2019] [Indexed: 11/28/2022] Open
Abstract
Laser-accelerated protons have a great potential for innovative experiments in radiation biology due to the sub-picosecond pulse duration and high dose rate achievable. However, the broad angular divergence makes them not optimal for applications with stringent requirements on dose homogeneity and total flux at the irradiated target. The strategy otherwise adopted to increase the homogeneity is to increase the distance between the source and the irradiation plane or to spread the beam with flat scattering systems or through the transport system itself. Such methods considerably reduce the proton flux and are not optimal for laser-accelerated protons. In this paper we demonstrate the use of a Genetic Algorithm (GA) to design an optimal non-flat scattering system to shape the beam and efficiently flatten the transversal dose distribution at the irradiated target. The system is placed in the magnetic transport system to take advantage of the presence of chromatic focusing elements to further mix the proton trajectories. The effect of a flat scattering system placed after the transport system is also presented for comparison. The general structure of the GA and its application to the shaping of a laser-accelerated proton beam are presented, as well as its application to the optimisation of dose distribution in a water target in air.
Collapse
Affiliation(s)
- M Cavallone
- Laboratoire d'Optique Appliquée, ENSTA-ParisTech, École Polytechnique, CNRS-UMR7639, Institut Polytechnique de Paris, 828 bd des Maréchaux, 91762 Palaiseau cedex, France
| | - A Flacco
- Laboratoire d'Optique Appliquée, ENSTA-ParisTech, École Polytechnique, CNRS-UMR7639, Institut Polytechnique de Paris, 828 bd des Maréchaux, 91762 Palaiseau cedex, France.
| | - V Malka
- Laboratoire d'Optique Appliquée, ENSTA-ParisTech, École Polytechnique, CNRS-UMR7639, Institut Polytechnique de Paris, 828 bd des Maréchaux, 91762 Palaiseau cedex, France; Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel
| |
Collapse
|
21
|
Asavei T, Bobeica M, Nastasa V, Manda G, Naftanaila F, Bratu O, Mischianu D, Cernaianu MO, Ghenuche P, Savu D, Stutman D, Tanaka KA, Radu M, Doria D, Vasos PR. Laser-driven radiation: Biomarkers for molecular imaging of high dose-rate effects. Med Phys 2019; 46:e726-e734. [PMID: 31357243 PMCID: PMC6899889 DOI: 10.1002/mp.13741] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 04/11/2019] [Accepted: 07/03/2019] [Indexed: 12/15/2022] Open
Abstract
Recently developed short‐pulsed laser sources garner high dose‐rate beams such as energetic ions and electrons, x rays, and gamma rays. The biological effects of laser‐generated ion beams observed in recent studies are different from those triggered by radiation generated using classical accelerators or sources, and this difference can be used to develop new strategies for cancer radiotherapy. High‐power lasers can now deliver particles in doses of up to several Gy within nanoseconds. The fast interaction of laser‐generated particles with cells alters cell viability via distinct molecular pathways compared to traditional, prolonged radiation exposure. The emerging consensus of recent literature is that the differences are due to the timescales on which reactive molecules are generated and persist, in various forms. Suitable molecular markers have to be adopted to monitor radiation effects, addressing relevant endogenous molecules that are accessible for investigation by noninvasive procedures and enable translation to clinical imaging. High sensitivity has to be attained for imaging molecular biomarkers in cells and in vivo to follow radiation‐induced functional changes. Signal‐enhanced MRI biomarkers enriched with stable magnetic nuclear isotopes can be used to monitor radiation effects, as demonstrated recently by the use of dynamic nuclear polarization (DNP) for biomolecular observations in vivo. In this context, nanoparticles can also be used as radiation enhancers or biomarker carriers. The radiobiology‐relevant features of high dose‐rate secondary radiation generated using high‐power lasers and the importance of noninvasive biomarkers for real‐time monitoring the biological effects of radiation early on during radiation pulse sequences are discussed.
Collapse
Affiliation(s)
- Theodor Asavei
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Mariana Bobeica
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Viorel Nastasa
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, RO-077125, Bucharest-Magurele, Romania
| | - Gina Manda
- Cellular and Molecular Medicine Department, "Victor Babes" National Institute of Pathology, 99-101 Splaiul Independentei, Bucharest, 050096, Romania
| | - Florin Naftanaila
- Carol Davila University of Medicine and Pharmacy Bucharest, Dr Carol Davila Central Mil University Emergency Hospital, 88th Mircea Vulcanescu Str, Bucharest, Romania.,Amethyst Radiotherapy Clinic, Dr Odaii 42, Otopeni, Romania
| | - Ovidiu Bratu
- Carol Davila University of Medicine and Pharmacy Bucharest, Dr Carol Davila Central Mil University Emergency Hospital, 88th Mircea Vulcanescu Str, Bucharest, Romania
| | - Dan Mischianu
- Carol Davila University of Medicine and Pharmacy Bucharest, Dr Carol Davila Central Mil University Emergency Hospital, 88th Mircea Vulcanescu Str, Bucharest, Romania
| | - Mihail O Cernaianu
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Petru Ghenuche
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Diana Savu
- Department of Life and Environmental Physics, Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Dan Stutman
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, RO-077125, Bucharest-Magurele, Romania.,Johns Hopkins University, 3400 N Charles St, Baltimore, Maryland, 21218, USA
| | - Kazuo A Tanaka
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Mihai Radu
- Department of Life and Environmental Physics, Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania
| | - Domenico Doria
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, Belfast, BT7 1NN, United Kingdom
| | - Paul R Vasos
- Extreme Light Infrastructure - Nuclear Physics ELI-NP, "Horia Hulubei" National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125, Bucharest-Magurele, Romania.,Research Institute of the University of Bucharest (ICUB), 36-46 B-dul M. Kogalniceanu, RO-050107, Bucharest, Romania
| |
Collapse
|
22
|
Fast dose fractionation using ultra-short laser accelerated proton pulses can increase cancer cell mortality, which relies on functional PARP1 protein. Sci Rep 2019; 9:10132. [PMID: 31300704 PMCID: PMC6626007 DOI: 10.1038/s41598-019-46512-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 06/28/2019] [Indexed: 01/07/2023] Open
Abstract
Radiotherapy is a cornerstone of cancer management. The improvement of spatial dose distribution in the tumor volume by minimizing the dose deposited in the healthy tissues have been a major concern during the last decades. Temporal aspects of dose deposition are yet to be investigated. Laser-plasma-based particle accelerators are able to emit pulsed-proton beams at extremely high peak dose rates (~109 Gy/s) during several nanoseconds. The impact of such dose rates on resistant glioblastoma cell lines, SF763 and U87-MG, was compared to conventionally accelerated protons and X-rays. No difference was observed in DNA double-strand breaks generation and cells killing. The variation of the repetition rate of the proton bunches produced an oscillation of the radio-induced cell susceptibility in human colon carcinoma HCT116 cells, which appeared to be related to the presence of the PARP1 protein and an efficient parylation process. Interestingly, when laser-driven proton bunches were applied at 0.5 Hz, survival of the radioresistant HCT116 p53−/− cells equaled that of its radiosensitive counterpart, HCT116 WT, which was also similar to cells treated with the PARP1 inhibitor Olaparib. Altogether, these results suggest that the application modality of ultrashort bunches of particles could provide a great therapeutic potential in radiotherapy.
Collapse
|
23
|
DNA DSB Repair Dynamics following Irradiation with Laser-Driven Protons at Ultra-High Dose Rates. Sci Rep 2019; 9:4471. [PMID: 30872656 PMCID: PMC6418121 DOI: 10.1038/s41598-019-40339-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 02/07/2019] [Indexed: 11/09/2022] Open
Abstract
Protontherapy has emerged as more effective in the treatment of certain tumors than photon based therapies. However, significant capital and operational costs make protontherapy less accessible. This has stimulated interest in alternative proton delivery approaches, and in this context the use of laser-based technologies for the generation of ultra-high dose rate ion beams has been proposed as a prospective route. A better understanding of the radiobiological effects at ultra-high dose-rates is important for any future clinical adoption of this technology. In this study, we irradiated human skin fibroblasts-AG01522B cells with laser-accelerated protons at a dose rate of 109 Gy/s, generated using the Gemini laser system at the Rutherford Appleton Laboratory, UK. We studied DNA double strand break (DSB) repair kinetics using the p53 binding protein-1(53BP1) foci formation assay and observed a close similarity in the 53BP1 foci repair kinetics in the cells irradiated with 225 kVp X-rays and ultra- high dose rate protons for the initial time points. At the microdosimetric scale, foci per cell per track values showed a good correlation between the laser and cyclotron-accelerated protons indicating similarity in the DNA DSB induction and repair, independent of the time duration over which the dose was delivered.
Collapse
|
24
|
ELIMAIA: A Laser-Driven Ion Accelerator for Multidisciplinary Applications. QUANTUM BEAM SCIENCE 2018. [DOI: 10.3390/qubs2020008] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
25
|
Simara P, Tesarova L, Rehakova D, Matula P, Stejskal S, Hampl A, Koutna I. DNA double-strand breaks in human induced pluripotent stem cell reprogramming and long-term in vitro culturing. Stem Cell Res Ther 2017; 8:73. [PMID: 28327192 PMCID: PMC5361733 DOI: 10.1186/s13287-017-0522-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 02/09/2017] [Accepted: 02/24/2017] [Indexed: 01/10/2023] Open
Abstract
Background Human induced pluripotent stem cells (hiPSCs) play roles in both disease modelling and regenerative medicine. It is critical that the genomic integrity of the cells remains intact and that the DNA repair systems are fully functional. In this article, we focused on the detection of DNA double-strand breaks (DSBs) by phosphorylated histone H2AX (known as γH2AX) and p53-binding protein 1 (53BP1) in three distinct lines of hiPSCs, their source cells, and one line of human embryonic stem cells (hESCs). Methods We measured spontaneously occurring DSBs throughout the process of fibroblast reprogramming and during long-term in vitro culturing. To assess the variations in the functionality of the DNA repair system among the samples, the number of DSBs induced by γ-irradiation and the decrease over time was analysed. The foci number was detected by fluorescence microscopy separately for the G1 and S/G2 cell cycle phases. Results We demonstrated that fibroblasts contained a low number of non-replication-related DSBs, while this number increased after reprogramming into hiPSCs and then decreased again after long-term in vitro passaging. The artificial induction of DSBs revealed that the repair mechanisms function well in the source cells and hiPSCs at low passages, but fail to recognize a substantial proportion of DSBs at high passages. Conclusions Our observations suggest that cellular reprogramming increases the DSB number but that the repair mechanism functions well. However, after prolonged in vitro culturing of hiPSCs, the repair capacity decreases. Electronic supplementary material The online version of this article (doi:10.1186/s13287-017-0522-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Pavel Simara
- Centre for Biomedical Image Analysis, Faculty of Informatics, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic.
| | - Lenka Tesarova
- Centre for Biomedical Image Analysis, Faculty of Informatics, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Daniela Rehakova
- Centre for Biomedical Image Analysis, Faculty of Informatics, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Pavel Matula
- Centre for Biomedical Image Analysis, Faculty of Informatics, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Stanislav Stejskal
- Centre for Biomedical Image Analysis, Faculty of Informatics, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Ales Hampl
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Kamenice 3, 625 00, Brno, Czech Republic
| | - Irena Koutna
- Centre for Biomedical Image Analysis, Faculty of Informatics, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| |
Collapse
|