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Louati S, Wozny AS, Malesys C, Daguenet E, Ladjohounlou R, Alphonse G, Tomasetto C, Magné N, Rodriguez-Lafrasse C. Differential Formation of Stress Granules in Radiosensitive and Radioresistant Head and Neck Squamous Cell Carcinoma Cells. Int J Radiat Oncol Biol Phys 2024; 118:485-497. [PMID: 37619790 DOI: 10.1016/j.ijrobp.2023.08.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/02/2023] [Accepted: 08/11/2023] [Indexed: 08/26/2023]
Abstract
PURPOSE Stress granules (SGs) are cytoplasmic aggregates in which mRNAs and specific proteins are trapped in response to a variety of damaging agents. They participate in the cellular defense mechanisms. Currently, their mechanism of formation in response to ionizing radiation and their role in tumor-cell radiosensitivity remain elusive. METHODS AND MATERIALS The kinetics of SG formation was investigated after the delivery of photon irradiation at different doses to head and neck squamous cell carcinoma cell lines with different radiosensitivities and the HeLa cervical cancer cell line (used as reference). In parallel, the response to a canonical inducer of SGs, sodium arsenite, was also studied. Immunolabeling of SG-specific proteins and mRNA fluorescence in situ hybridization enabled SG detection and quantification. Furthermore, a ribopuromycylation assay was used to assess the cell translational status. To determine whether reactive oxygen species were involved in SG formation, their scavenging or production was induced by pharmacologic pretreatment in both SCC61 and SQ20B cells. RESULTS Photon irradiation at different doses led to the formation of cytoplasmic foci that were positive for different SG markers. The presence of SGs gradually increased from 30 minutes to 2 hours postexposure in HeLa, SCC61, and Cal60 radiosensitive cells. In turn, the SQ20B and FaDu radioresistant cells did not form SGs. These results indicated a correlation between sensitivity to photon irradiation and SG formation. Moreover, SG formation was significantly reduced by reactive oxygen species scavenging using dimethyl sulfoxide in SCC61 cells, which supported their role in SG formation. However, a reciprocal experiment in SQ20B cells that depleted glutathione using buthionine sulfoximide did not restore SG formation in these cells. CONCLUSIONS SGs are formed in response to irradiation in radiosensitive, but not in radioresistant, head and neck squamous cell carcinoma cells. Interestingly, compared with sodium arsenite-induced SGs, photon-induced SGs exhibited a different morphology and cellular localization. Moreover, photon-induced SGs were not associated with the inhibition of translation; rather, they depended on oxidative stress.
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Affiliation(s)
- Safa Louati
- Cellular and Molecular Radiobiology Laboratory, Lyon-Sud Medical School, UMR CNRS 5822/IP2I, Université de Lyon, Lyon 1 University, Oullins, France; Department of Research and Teaching in Oncology, Hôpital Nord, Saint-Priest en Jarez, France
| | - Anne-Sophie Wozny
- Cellular and Molecular Radiobiology Laboratory, Lyon-Sud Medical School, UMR CNRS 5822/IP2I, Université de Lyon, Lyon 1 University, Oullins, France; Department of Biochemistry and Molecular Biology, Lyon-Sud Hospital, Hospices Civils de Lyon, Pierre-Bénite, France
| | - Céline Malesys
- Cellular and Molecular Radiobiology Laboratory, Lyon-Sud Medical School, UMR CNRS 5822/IP2I, Université de Lyon, Lyon 1 University, Oullins, France
| | - Elisabeth Daguenet
- Department of Research and Teaching in Oncology, Hôpital Nord, Saint-Priest en Jarez, France
| | - Riad Ladjohounlou
- Cellular and Molecular Radiobiology Laboratory, Lyon-Sud Medical School, UMR CNRS 5822/IP2I, Université de Lyon, Lyon 1 University, Oullins, France
| | - Gersende Alphonse
- Cellular and Molecular Radiobiology Laboratory, Lyon-Sud Medical School, UMR CNRS 5822/IP2I, Université de Lyon, Lyon 1 University, Oullins, France; Department of Biochemistry and Molecular Biology, Lyon-Sud Hospital, Hospices Civils de Lyon, Pierre-Bénite, France
| | - Catherine Tomasetto
- Institute of Genetic, Molecular and Cellular Biology, Université de Strasbourg, Illkirch, France
| | - Nicolas Magné
- Cellular and Molecular Radiobiology Laboratory, Lyon-Sud Medical School, UMR CNRS 5822/IP2I, Université de Lyon, Lyon 1 University, Oullins, France; Radiotherapy Department, Bergonié Institute, Bordeaux, France
| | - Claire Rodriguez-Lafrasse
- Cellular and Molecular Radiobiology Laboratory, Lyon-Sud Medical School, UMR CNRS 5822/IP2I, Université de Lyon, Lyon 1 University, Oullins, France; Department of Biochemistry and Molecular Biology, Lyon-Sud Hospital, Hospices Civils de Lyon, Pierre-Bénite, France.
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Zhu H, Schuemann J, Zhang Q, Gerweck LE. Modeling the impact of tissue oxygen profiles and oxygen depletion parameter uncertainties on biological response and therapeutic benefit of FLASH. Med Phys 2024; 51:670-681. [PMID: 36939370 PMCID: PMC10509320 DOI: 10.1002/mp.16366] [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: 08/09/2022] [Revised: 02/22/2023] [Accepted: 03/06/2023] [Indexed: 03/21/2023] Open
Abstract
BACKGROUND Ultra-high dose rate (FLASH) radiation has been reported to efficiently suppress tumor growth while sparing normal tissue; however, the mechanism of the differential tissue sparing effect is still not known. Oxygen has long been known to profoundly impact radiobiological responses, and radiolytic oxygen depletion has been considered to be a possible cause or contributor to the FLASH phenomenon. PURPOSE This work investigates the impact of tissue pO2 profiles, oxygen depletion per unit dose (g), and the oxygen concentration yielding half-maximum radiosensitization (the average of its maximum value and one) (k) in tumor and normal tissue. METHODS We developed a model that considers the dependent relationship between oxygen depletion and change of radiosensitivity by FLASH irradiation. The model assumed that FLASH irradiation depletes intracellular oxygen more rapidly than it diffuses into the cell from the extracellular environment. Cell survival was calculated based on the linear quadratic-linear model and the radiosensitivity related parameters were adjusted in 1 Gy increments of the administered dose. The model reproduced published experimental data that were obtained with different cell lines and oxygen concentrations, and was used to analyze the impact of parameter uncertainties on the radiobiological responses. This study expands the oxygen depletion analysis of FLASH to normal human tissue and tumor based on clinically determined aggregate and individual patient pO2 profiles. RESULTS The results show that the pO2 profile is the most essential factor that affects biological response and analyses based on the median pO2 rather than the full pO2 profile can be unreliable and misleading. Additionally, the presence of a small fraction of cells on the threshold of radiobiologic hypoxia substantially alters biological response due to FLASH oxygen depletion. We found that an increment in the k value is generally more protective of tumor than normal tissue due to a higher frequency of lower pO2 values in tumors. Variation in the g value affects the dose at which oxygen depletion impacts response, but does not alter the dose-dependent response trends, if the g value is identical in both tumor and normal tissue. CONCLUSIONS The therapeutic efficacy of FLASH oxygen depletion is likely patient and tissue-dependent. For breast cancer, FLASH is beneficial in a minority of cases; however, in a subset of well oxygenated tumors, a therapeutic gain may be realized due to induced normal tissue hypoxia.
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Affiliation(s)
- Hongyu Zhu
- Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Guangzhou 510060, China
| | - Jan Schuemann
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA 02114, United States of America
| | - Qixian Zhang
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Leo E Gerweck
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA 02114, United States of America
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Chvetsov AV, Hanin LG, Stewart RD, Zeng J, Rengan R, Lo SS. Tumor control probability in hypofractionated radiotherapy as a function of total and hypoxic tumor volumes. Phys Med Biol 2021; 66. [PMID: 34030139 DOI: 10.1088/1361-6560/ac047e] [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: 02/28/2021] [Accepted: 05/24/2021] [Indexed: 11/12/2022]
Abstract
Clinical studies in the hypofractionated stereotactic body radiotherapy (SBRT) have shown a reduction in the probability of local tumor control with increasing initial tumor volume. In our earlier work, we obtained and tested an analytical dependence of the tumor control probability (TCP) on the total and hypoxic tumor volumes using conventional radiotherapy model with the linear-quadratic (LQ) cell survival. In this work, this approach is further refined and tested against clinical observations for hypofractionated radiotherapy treatment schedules. Compared to radiotherapy with conventional fractionation schedules, simulations of hypofractionated radiotherapy may require different models for cell survival and the oxygen enhancement ratio (OER). Our TCP simulations in hypofractionated radiotherapy are based on the LQ model and the universal survival curve (USC) developed for the high doses used in SBRT. The predicted trends in local control as a function of the initial tumor volume were evaluated in SBRT for non-small cell lung cancer (NSCLC). Our results show that both LQ and USC based models cannot describe the TCP reduction for larger tumor volumes observed in the clinical studies if the tumor is considered completely oxygenated. The TCP calculations are in agreement with the clinical data if the subpopulation of radio-resistant hypoxic cells is considered with the volume that increases as initial tumor volume increases. There are two conclusions which follow from our simulations. First, the extent of hypoxia is likely a primary reason of the TCP reduction with increasing the initial tumor volume in SBRT for NSCLC. Second, the LQ model can be an acceptable approximation for the TCP calculations in hypofractionated radiotherapy if the tumor response is defined primarily by the hypoxic fraction. The larger value of OER in the hypofractionated radiotherapy compared to the conventional radiotherapy effectively extends the applicability of the LQ model to larger doses.
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Affiliation(s)
- Alexei V Chvetsov
- Department of Radiation Oncology, University of Washington, 1959 NE Pacific Street, Seattle, WA, 98004, United States of America
| | - Leonid G Hanin
- Department of Mathematics and Statistics, Idaho State University, 921 S. 8th Avenue, Stop 8085, Pocatello, ID 83209-8085, United States of America
| | - Robert D Stewart
- Department of Radiation Oncology, University of Washington, 1959 NE Pacific Street, Seattle, WA, 98004, United States of America
| | - Jing Zeng
- Department of Radiation Oncology, University of Washington, 1959 NE Pacific Street, Seattle, WA, 98004, United States of America
| | - Ramesh Rengan
- Department of Radiation Oncology, University of Washington, 1959 NE Pacific Street, Seattle, WA, 98004, United States of America
| | - Simon S Lo
- Department of Radiation Oncology, University of Washington, 1959 NE Pacific Street, Seattle, WA, 98004, United States of America
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Impact of hypoxia on the double-strand break repair after photon and carbon ion irradiation of radioresistant HNSCC cells. Sci Rep 2020; 10:21357. [PMID: 33288855 PMCID: PMC7721800 DOI: 10.1038/s41598-020-78354-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 11/12/2020] [Indexed: 02/06/2023] Open
Abstract
DNA double-strand breaks (DSBs) induced by photon irradiation are the most deleterious damage for cancer cells and their efficient repair may contribute to radioresistance, particularly in hypoxic conditions. Carbon ions (C-ions) act independently of the oxygen concentration and trigger complex- and clustered-DSBs difficult to repair. Understanding the interrelation between hypoxia, radiation-type, and DNA-repair is therefore essential for overcoming radioresistance. The DSBs signaling and the contribution of the canonical non-homologous end-joining (NHEJ-c) and homologous-recombination (HR) repair pathways were assessed by immunostaining in two cancer-stem-cell (CSCs) and non-CSCs HNSCC cell lines. Detection and signaling of DSBs were lower in response to C-ions than photons. Hypoxia increased the decay-rate of the detected DSBs (γH2AX) in CSCs after photons and the initiation of DSB repair signaling (P-ATM) in CSCs and non-CSCs after both radiations, but not the choice of DSB repair pathway (53BP1). Additionally, hypoxia increased the NHEJ-c (DNA-PK) and the HR pathway (RAD51) activation only after photons. Furthermore, the involvement of the HR seemed to be higher in CSCs after photons and in non-CSCs after C-ions. Taken together, our results show that C-ions may overcome the radioresistance of HNSCC associated with DNA repair, particularly in CSCs, and independently of a hypoxic microenvironment.
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Petrović IM, Ristić Fira AM, Keta OD, Petković VD, Petringa G, Cirrone P, Cuttone G. A radiobiological study of carbon ions of different linear energy transfer in resistant human malignant cell lines. Int J Radiat Biol 2020; 96:1400-1412. [DOI: 10.1080/09553002.2020.1820609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ivan M. Petrović
- Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
| | | | - Otilija D. Keta
- Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
| | - Vladana D. Petković
- Vinča Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
| | - Giada Petringa
- Istituto Nazionale di Fisica Nucleare, LNS, Catania, Italy
| | - Pablo Cirrone
- Istituto Nazionale di Fisica Nucleare, LNS, Catania, Italy
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Lerch S, Berthold S, Ziemann F, Dreffke K, Subtil FSB, Senger Y, Jensen A, Engenhart-Cabillic R, Dikomey E, Wittig A, Eberle F, Schötz U. HPV-positive HNSCC cell lines show strongly enhanced radiosensitivity after photon but not after carbon ion irradiation. Radiother Oncol 2020; 151:134-140. [PMID: 32717362 DOI: 10.1016/j.radonc.2020.07.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/29/2020] [Accepted: 07/20/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND PURPOSE HPV positive (pos.) HNSCC cells are significantly more radiosensitive to photon irradiation as compared to HPV negative (neg.) cells. Functionally, this is considered to result from a reduced DSB repair capacity. It was now tested, whether such a difference is also observed when using carbon ion (12C) irradiation. MATERIAL AND METHODS Five HPV pos. and five HPV neg. HNSCC cell lines were irradiated with photons or 12C-ions using 2D or 3D cell culture conditions. Clonogenic survival was determined by colony formation assay and DSB repair by immunofluorescence using co-staining of γH2AX and 53BP1 foci. RESULTS The pronounced difference in radiosensitivity known for these two entities when exposed to photons in 2D cell culture, was reduced when treated under 3D conditions. Irradiation with 12C-ions strongly enhanced cell killing, whereby increase was more pronounced for the HPV neg. when compared to the HPV pos. cell line (RBE = 2.81 vs. 2.14). As a consequence, after 12C-irradiation clonogenic survival was almost identical for the two entities as was demonstrated for all cell lines at a dose of 3 Gy. In line with this, the significant difference in DSB repair capacity between HPV pos. and neg. HNSCC cells, as seen after photon irradiation, was abrogated after 12C-irradiation. CONCLUSION While HPV pos. cells are significantly more radiosensitive to photons than HPV neg. cells, no significant difference was seen after 12C-irradiation. This needs to be considered when planning new clinical protocols for the treatment of HPV neg. and pos. tumors with 12C-ions.
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Affiliation(s)
- Stefan Lerch
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany
| | - Sophie Berthold
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany
| | - Frank Ziemann
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany
| | - Kristin Dreffke
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany
| | | | | | - Alexandra Jensen
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany
| | | | - Ekkehard Dikomey
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany; Laboratory of Radiobiology & Experimental Radiooncology, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Andrea Wittig
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany; Department of Radiotherapy and Radiation Oncology, University Hospital Jena, Friedrich-Schiller-University, Germany
| | - Fabian Eberle
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany
| | - Ulrike Schötz
- Department of Radiotherapy and Radiooncology, Philipps-University Marburg, Germany.
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Li X, Zhang W, Wang X, Chen X, Pan H, Ruan Y, Khaledi N, Wei T, He X, Zhuo W, Shao C, Pan Y, Shi L, Fu S, Wang X. Charged particle radiobiology beamline using tandem accelerator-based MeV protons and carbon ions: a pilot study on the track-end radiation quality, variable biological effectiveness and Bayesian beam dosimetry. Phys Med Biol 2019; 64:165004. [PMID: 31096198 DOI: 10.1088/1361-6560/ab21fa] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
For in vitro cell irradiation using tandem accelerator-based MeV protons and carbon ions, by TOPAS simulation, a pilot study of performance evaluation is presented on a collimation beamline for 3 MeV protons and 10 MeV carbon ions from a 2 × 3 MV tandem accelerator. Based on the elements and source parameters, a collimated beam of 2.8 MeV protons or 2.5 MeV carbon ions, with 5.175 mm or 5.166 mm full width tenth maximum (FWTM), respectively, can be delivered to the target cell dish. TOPAS simulations and/or deterministic algorithms present a Bragg curve of linear energy transfer (LET) (10-70 keV μm-1) along a 138 μm range of the proton beam, and a declining LET of the carbon beam (900-100 keV μm-1) within 4 μm range. Based on the biophysical models for relative biological effectiveness (RBE) of protons, TOPAS RBE scorers presents a set of depth-variation curves of the proton RBE (for V79 and DU145 cells), linearly related to the Bragg curve of the proton LET. Based on the microdosimetric-kinetic (MK) theory, in the 4 μm range for a monolayer cell thickness, the mean RBEα (V79 cells) of the carbon ion beam is estimated as 3.612 (late S phase) and 1.737 (G 1/S phase) for the mean LET of 492 keV μm-1. For practical irradiations, a tunable proton RBE can be acquired by changing the thickness of the cell dish. For the low-energy high-fluence (rate) beams, indirect beam measurements are proposed to detect the proton-beam induced scattering/recoil protons from a beam-intercepting Mylar film, and the carbon-beam induced backscattered electrons from a gold-deposited Havar-foil beam window. Statistical dosimetry for the indirect measurement is established, using a Bayesian model based on the preset number of detection counts, by which the mean value of the whole-dish dose can be prescribed and the uncertainty introduced in the survival data can be corrected.
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Affiliation(s)
- Xiang Li
- Institute of Modern Physics, Fudan University, Shanghai 200433, People's Republic of China. Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Fudan University, Shanghai 200433, People's Republic of China. Co-first authors having equal contribution to this work
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Influence of Linear Energy Transfer on the Nucleo-shuttling of the ATM Protein: A Novel Biological Interpretation Relevant for Particles and Radiation. Int J Radiat Oncol Biol Phys 2018; 103:709-718. [PMID: 30342967 DOI: 10.1016/j.ijrobp.2018.10.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 09/19/2018] [Accepted: 10/08/2018] [Indexed: 11/22/2022]
Abstract
PURPOSE Linear energy transfer (LET) plays an important role in radiation response. Recently, the radiation-induced nucleo-shuttling of ATM from cytoplasm to the nucleus was shown to be a major event of the radiation response that permits a normal DNA double-strand break (DSB) recognition and repair. Here, we aimed to verify the relevance of the ATM nucleo-shuttling model for high-LET particles and various radiation types. METHODS AND MATERIALS ATM- and H2AX-immunofluorescence was used to assess the number of recognized and unrepaired DSB in quiescent fibroblast cell lines exposed to x-rays, γ-rays, 9- and 12-MeV electrons, 3- and 65-MeV protons and 75-MeV/u carbon ions. RESULTS The rate of radiation-induced ATM nucleo-shuttling was found to be specific to each radiation type tested. By increasing the permeability of the nuclear membrane with statin and bisphosphonates, 2 fibroblast cell lines exposed to high-LET particles were shown to be protected by an accelerated ATM nucleo-shuttling. CONCLUSIONS Our findings are in agreement with the conclusion that LET and the radiation/particle type influence the formation of ATM monomers in cytoplasm that are required for DSB recognition. A striking analogy was established between the DSB repair kinetics of radioresistant cells exposed to high-LET particles and that of several radiosensitive cells exposed to low-LET radiation. Our data show that the nucleo-shuttling of ATM provides crucial elements to predict radiation response in human quiescent cells, whatever the LET value and their radiosensitivity.
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Moncharmont C, Guy JB, Wozny AS, Gilormini M, Battiston-Montagne P, Ardail D, Beuve M, Alphonse G, Simoëns X, Rancoule C, Rodriguez-Lafrasse C, Magné N. Carbon ion irradiation withstands cancer stem cells' migration/invasion process in Head and Neck Squamous Cell Carcinoma (HNSCC). Oncotarget 2018; 7:47738-47749. [PMID: 27374096 PMCID: PMC5216975 DOI: 10.18632/oncotarget.10281] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 05/28/2016] [Indexed: 12/12/2022] Open
Abstract
Cancer Stem Cells (CSCs) in Head and Neck Squamous Cell Carcinoma (HNSCC) have extremely aggressive profile (high migratory and invasive potential). These characteristics can explain their resistance to conventional treatment. Efficacy of photon and carbon ion irradiation with addition of cetuximab (5 nM) is studied on clonogenic death, migration and invasion of two HNSCC populations: SQ20B and SQ20B/CSCs. SQ20B express E-cadherin and overexpress EGFR while SQ20B/CSCs express N-cadherin and low EGFR. Cetuximab strongly inhibits SQ20B proliferation but has no effect on SQ20B/CSCs. 2 Gy photon irradiation enhances migration and invasiveness in both populations (p < 0.05), while cetuximab only stops SQ20B migration (p < 0.005). Carbon irradiation significantly inhibits invasion in both populations (p < 0.05), and the association with cetuximab significantly inhibits invasion in both populations (p < 0.005). These results highlight CSCs characteristics: EGFRLow, cetuximab-resistant, and highly migratory. Carbon ion irradiation appears to be a very promising therapeutic modality counteracting migration/invasion process in both parental cells and CSCs in contrast to photon irradiation.
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Affiliation(s)
- Coralie Moncharmont
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France.,Département de Radiothérapie, Institut de Cancérologie de la Loire - Lucien Neuwirth, St Priest en Jarez, 42270, France
| | - Jean-Baptiste Guy
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France.,Département de Radiothérapie, Institut de Cancérologie de la Loire - Lucien Neuwirth, St Priest en Jarez, 42270, France
| | - Anne-Sophie Wozny
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France.,Hospices Civils de Lyon, Lyon, 69229, France
| | - Marion Gilormini
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France
| | - Priscilla Battiston-Montagne
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France
| | - Dominique Ardail
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France.,Hospices Civils de Lyon, Lyon, 69229, France
| | - Michael Beuve
- Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France
| | - Gersende Alphonse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France.,Hospices Civils de Lyon, Lyon, 69229, France
| | - Xavier Simoëns
- Département de Pharmacologie Clinique et d'Innovation, Institut de Cancérologie de la Loire - Lucien Neuwirth, St Priest en Jarez, 42270, France
| | - Chloé Rancoule
- Département de Radiothérapie, Institut de Cancérologie de la Loire - Lucien Neuwirth, St Priest en Jarez, 42270, France
| | - Claire Rodriguez-Lafrasse
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France.,Hospices Civils de Lyon, Lyon, 69229, France
| | - Nicolas Magné
- Université Lyon 1, Faculté de Médecine-Lyon-Sud, Oullins, 69921, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne, 69622, France.,Département de Radiothérapie, Institut de Cancérologie de la Loire - Lucien Neuwirth, St Priest en Jarez, 42270, France
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Gilormini M, Malesys C, Armandy E, Manas P, Guy JB, Magné N, Rodriguez-Lafrasse C, Ardail D. Preferential targeting of cancer stem cells in the radiosensitizing effect of ABT-737 on HNSCC. Oncotarget 2017; 7:16731-44. [PMID: 26934442 PMCID: PMC4941347 DOI: 10.18632/oncotarget.7744] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 01/13/2016] [Indexed: 12/26/2022] Open
Abstract
Head and neck squamous cell carcinomas (HNSCC) are common human malignancies with poor clinical outcomes. The 5-year survival rates for patients with advanced stage HNSCC have not changed appreciably in the past few decades, underscoring a dire need for improved therapeutic options. HNSCC is frequently characterized by overexpression of anti-apoptotic Bcl-2 family members. Increased levels of these anti-apoptotic proteins have been associated with radio- and chemoresistance and poor clinical outcome. The aim of this study was to evaluate combined effects of radiation and ABT-737, a BH3-mimetic molecule, in HNSCC. Although ABT-737, as a single agent, was largely ineffective at promoting HNSCC cell death, we found that combining ABT-737 and radiation induced strong synergistic apoptosis in HNSCC cell lines and delayed tumoral growth in vivo. Moreover, we demonstrated for the first time that ABT-737, alone or in combination with radiation, can efficiently eliminate cancer stem cells (CSCs). Altogether, our results indicate that therapy targeting anti-apoptotic Bcl-2 family members could be a highly effective potential adjuvant to radiotherapy capable of targeting CSCs in HNSCC and therefore overcoming cancer recurrence and metastasis.
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Affiliation(s)
- Marion Gilormini
- Université Lyon I, Faculté de Médecine-Lyon-Sud, Oullins, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Oullins, France
| | - Céline Malesys
- Université Lyon I, Faculté de Médecine-Lyon-Sud, Oullins, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Oullins, France
| | - Emma Armandy
- Université Lyon I, Faculté de Médecine-Lyon-Sud, Oullins, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Oullins, France
| | - Patrick Manas
- UMS3444 BioSciences Gerland-Lyon Sud, PBES, Lyon, France
| | - Jean-Baptiste Guy
- Université Lyon I, Faculté de Médecine-Lyon-Sud, Oullins, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Oullins, France
| | - Nicolas Magné
- Université Lyon I, Faculté de Médecine-Lyon-Sud, Oullins, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Oullins, France.,Institut de Cancérologie L. Neuwirth, St Etienne, France
| | - Claire Rodriguez-Lafrasse
- Université Lyon I, Faculté de Médecine-Lyon-Sud, Oullins, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Oullins, France.,Hospices-Civils-de-Lyon, CHLS, Pierre-Bénite, France
| | - Dominique Ardail
- Université Lyon I, Faculté de Médecine-Lyon-Sud, Oullins, France.,Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Oullins, France.,Hospices-Civils-de-Lyon, CHLS, Pierre-Bénite, France
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11
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Xie Y, Si J, Wang Y, Li H, Di C, Yan J, Ye Y, Zhang Y, Zhang H. E2F is involved in radioresistance of carbon ion induced apoptosis via Bax/caspase 3 signal pathway in human hepatoma cell. J Cell Physiol 2017; 233:1312-1320. [DOI: 10.1002/jcp.26005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 05/11/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Yi Xie
- Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
- CAS Key Laboratory of Heavy Ion Radiation Biology and MedicineInstitute of Modern PhysicsLanzhouGansuChina
- Key Laboratory of Basic Research on Heavy Ion Radiation Application in MedicineGansu ProvinceLanzhouChina
| | - Jing Si
- Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
- CAS Key Laboratory of Heavy Ion Radiation Biology and MedicineInstitute of Modern PhysicsLanzhouGansuChina
- Key Laboratory of Basic Research on Heavy Ion Radiation Application in MedicineGansu ProvinceLanzhouChina
| | - Yu‐Pei Wang
- Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
- CAS Key Laboratory of Heavy Ion Radiation Biology and MedicineInstitute of Modern PhysicsLanzhouGansuChina
- Key Laboratory of Basic Research on Heavy Ion Radiation Application in MedicineGansu ProvinceLanzhouChina
- Graduate School of University of Chinese Academy of SciencesBeijingChina
| | - Hong‐Yan Li
- Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
- CAS Key Laboratory of Heavy Ion Radiation Biology and MedicineInstitute of Modern PhysicsLanzhouGansuChina
- Key Laboratory of Basic Research on Heavy Ion Radiation Application in MedicineGansu ProvinceLanzhouChina
- Graduate School of University of Chinese Academy of SciencesBeijingChina
| | - Cui‐Xia Di
- Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
- CAS Key Laboratory of Heavy Ion Radiation Biology and MedicineInstitute of Modern PhysicsLanzhouGansuChina
- Key Laboratory of Basic Research on Heavy Ion Radiation Application in MedicineGansu ProvinceLanzhouChina
| | - Jun‐Fang Yan
- Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
- CAS Key Laboratory of Heavy Ion Radiation Biology and MedicineInstitute of Modern PhysicsLanzhouGansuChina
- Key Laboratory of Basic Research on Heavy Ion Radiation Application in MedicineGansu ProvinceLanzhouChina
- Graduate School of University of Chinese Academy of SciencesBeijingChina
| | | | | | - Hong Zhang
- Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina
- CAS Key Laboratory of Heavy Ion Radiation Biology and MedicineInstitute of Modern PhysicsLanzhouGansuChina
- Key Laboratory of Basic Research on Heavy Ion Radiation Application in MedicineGansu ProvinceLanzhouChina
- Gansu Wuwei Tumor HospitalWuweiChina
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12
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Differential pattern of HIF-1α expression in HNSCC cancer stem cells after carbon ion or photon irradiation: one molecular explanation of the oxygen effect. Br J Cancer 2017; 116:1340-1349. [PMID: 28407653 PMCID: PMC5482725 DOI: 10.1038/bjc.2017.100] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 03/17/2017] [Accepted: 03/21/2017] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Head and neck squamous cell carcinoma (HNSCC) are resistant to standard treatments, partly due to cancer stem cells (CSCs) localised in hypoxic niches. Compared to X-rays, carbon ion irradiation relies on better ballistic properties, higher relative biological effectiveness and the absence of oxygen effect. Hypoxia-inducible factor-1α (HIF-1α) is involved in the resistance to photons, whereas its role in response to carbon ions remains unclear. METHODS Two HNSCC cell lines and their CSC sub-population were studied in response to photons or carbon ion irradiation, in normoxia or hypoxia, after inhibition or not of HIF-1α. RESULTS Under hypoxia, compared to non-CSCs, HIF-1α is expressed earlier in CSCs. A combined effect photons/hypoxia, less observed with carbon ions, results in a synergic and earlier HIF-1α expression in both subpopulations. The diffuse ROS production by photons is concomitant with HIF-1α expression and essential to its activation. There is no oxygen effect in response to carbon ions and the ROS localised in the track might be insufficient to stabilise HIF-1α. Finally, in hypoxia, cells were sensitised to both types of radiations after HIF-1α inhibition. CONCLUSIONS Hypoxia-inducible factor-1α plays a main role in the response of CSCs and non-CSCs to carbon ion and photon irradiations, which makes the HIF-1α targeting an attractive therapeutic challenge.
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13
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Ferrero V, Visonà G, Dalmasso F, Gobbato A, Cerello P, Strigari L, Visentin S, Attili A. Targeted dose enhancement in radiotherapy for breast cancer using gold nanoparticles, part 1: A radiobiological model study. Med Phys 2017; 44:1983-1992. [DOI: 10.1002/mp.12180] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 12/15/2016] [Accepted: 02/13/2017] [Indexed: 01/22/2023] Open
Affiliation(s)
- Veronica Ferrero
- Physics Department; Università degli Studi di Torino; Torino Italy
- Istituto Nazionale di Fisica Nucleare (INFN); Torino Italy
| | - Giovanni Visonà
- Physics Department; Università degli Studi di Torino; Torino Italy
| | - Federico Dalmasso
- Physics Department; Università degli Studi di Torino; Torino Italy
- Istituto Nazionale di Fisica Nucleare (INFN); Torino Italy
| | - Andrea Gobbato
- Physics Department; Università degli Studi di Torino; Torino Italy
- Istituto Nazionale di Fisica Nucleare (INFN); Torino Italy
| | | | - Lidia Strigari
- Laboratory of Medical Physics and Expert Systems; National Cancer Institute Regina Elena; Roma Italy
| | - Sonja Visentin
- Istituto Nazionale di Fisica Nucleare (INFN); Torino Italy
- Molecular Biotechnology and Health Sciences Department; Università degli Studi di Torino; Torino Italy
| | - Andrea Attili
- Istituto Nazionale di Fisica Nucleare (INFN); Torino Italy
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14
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Wozny AS, Alphonse G, Battiston-Montagne P, Simonet S, Poncet D, Testa E, Guy JB, Rancoule C, Magné N, Beuve M, Rodriguez-Lafrasse C. Corrigendum: Influence of Dose Rate on the Cellular Response to Low- and High-LET Radiations. Front Oncol 2017; 6:271. [PMID: 28105406 PMCID: PMC5243835 DOI: 10.3389/fonc.2016.00271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 12/20/2016] [Indexed: 11/13/2022] Open
Abstract
[This corrects the article on p. 58 in vol. 6, PMID: 27014633.].
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Affiliation(s)
- Anne-Sophie Wozny
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Univ Lyon, UCBL1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
| | - Gersende Alphonse
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Univ Lyon, UCBL1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
| | | | - Stéphanie Simonet
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Univ Lyon, UCBL1 , Oullins , France
| | - Delphine Poncet
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Univ Lyon, UCBL1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
| | | | - Jean-Baptiste Guy
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Univ Lyon, UCBL1, Oullins, France; Departement de Radiothérapie, Institut de Cancérologie de la Loire Lucien Neuwirth, St-Priest-en-Jarez, France
| | - Chloé Rancoule
- Departement de Radiothérapie, Institut de Cancérologie de la Loire Lucien Neuwirth , St-Priest-en-Jarez , France
| | - Nicolas Magné
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Univ Lyon, UCBL1, Oullins, France; Departement de Radiothérapie, Institut de Cancérologie de la Loire Lucien Neuwirth, St-Priest-en-Jarez, France
| | | | - Claire Rodriguez-Lafrasse
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Univ Lyon, UCBL1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
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15
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Wozny AS, Alphonse G, Battiston-Montagne P, Simonet S, Poncet D, Testa E, Guy JB, Rancoule C, Magné N, Beuve M, Rodriguez-Lafrasse C. Influence of Dose Rate on the Cellular Response to Low- and High-LET Radiations. Front Oncol 2016; 6:58. [PMID: 27014633 PMCID: PMC4790194 DOI: 10.3389/fonc.2016.00058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 02/28/2016] [Indexed: 11/13/2022] Open
Abstract
Nowadays, head and neck squamous cell carcinoma (HNSCC) treatment failure is mostly explained by locoregional progression or intrinsic radioresistance. Radiotherapy (RT) has recently evolved with the emergence of heavy ion radiations or new fractionation schemes of photon therapy, which modify the dose rate of treatment delivery. The aim of the present study was then to evaluate the in vitro influence of a dose rate variation during conventional RT or carbon ion hadrontherapy treatment in order to improve the therapeutic care of patient. In this regard, two HNSCC cell lines were irradiated with photons or 72 MeV/n carbon ions at a dose rate of 0.5, 2, or 10 Gy/min. For both radiosensitive and radioresistant cells, the change in dose rate significantly affected cell survival in response to photon exposure. This variation of radiosensitivity was associated with the number of initial and residual DNA double-strand breaks (DSBs). By contrast, the dose rate change did not affect neither cell survival nor the residual DNA DSBs after carbon ion irradiation. As a result, the relative biological efficiency at 10% survival increased when the dose rate decreased. In conclusion, in the RT treatment of HNSCC, it is advised to remain very careful when modifying the classical schemes toward altered fractionation. At the opposite, as the dose rate does not seem to have any effects after carbon ion exposure, there is less need to adapt hadrontherapy treatment planning during active system irradiation.
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Affiliation(s)
- Anne-Sophie Wozny
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
| | - Gersende Alphonse
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
| | - Priscillia Battiston-Montagne
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1 , Oullins , France
| | - Stéphanie Simonet
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1 , Oullins , France
| | - Delphine Poncet
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
| | | | - Jean-Baptiste Guy
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1, Oullins, France; Département de Radiothérapie, Institut de Cancérologie de la Loire Lucien Neuwirth, St-Priest-en-Jarez, France
| | - Chloé Rancoule
- Département de Radiothérapie, Institut de Cancérologie de la Loire Lucien Neuwirth , St-Priest-en-Jarez , France
| | - Nicolas Magné
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1, Oullins, France; Département de Radiothérapie, Institut de Cancérologie de la Loire Lucien Neuwirth, St-Priest-en-Jarez, France
| | | | - Claire Rodriguez-Lafrasse
- UMR/CNRS 5822, Laboratoire de Radiobiologie Cellulaire et Moléculaire, Université Claude Bernard Lyon 1, Oullins, France; Centre Hospitalier Lyon-Sud, Hospices-Civils-de-Lyon, Pierre-Bénite, France
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16
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Held KD, Kawamura H, Kaminuma T, Paz AES, Yoshida Y, Liu Q, Willers H, Takahashi A. Effects of Charged Particles on Human Tumor Cells. Front Oncol 2016; 6:23. [PMID: 26904502 PMCID: PMC4751258 DOI: 10.3389/fonc.2016.00023] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 01/21/2016] [Indexed: 12/22/2022] Open
Abstract
The use of charged particle therapy in cancer treatment is growing rapidly, in large part because the exquisite dose localization of charged particles allows for higher radiation doses to be given to tumor tissue while normal tissues are exposed to lower doses and decreased volumes of normal tissues are irradiated. In addition, charged particles heavier than protons have substantial potential clinical advantages because of their additional biological effects, including greater cell killing effectiveness, decreased radiation resistance of hypoxic cells in tumors, and reduced cell cycle dependence of radiation response. These biological advantages depend on many factors, such as endpoint, cell or tissue type, dose, dose rate or fractionation, charged particle type and energy, and oxygen concentration. This review summarizes the unique biological advantages of charged particle therapy and highlights recent research and areas of particular research needs, such as quantification of relative biological effectiveness (RBE) for various tumor types and radiation qualities, role of genetic background of tumor cells in determining response to charged particles, sensitivity of cancer stem-like cells to charged particles, role of charged particles in tumors with hypoxic fractions, and importance of fractionation, including use of hypofractionation, with charged particles.
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Affiliation(s)
- Kathryn D Held
- Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School , Boston, MA , USA
| | - Hidemasa Kawamura
- Gunma University Heavy Ion Medical Center, Gunma, Japan; Department of Radiation Oncology, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Takuya Kaminuma
- Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Gunma University Heavy Ion Medical Center, Gunma, Japan; Department of Radiation Oncology, Gunma University Graduate School of Medicine, Gunma, Japan
| | | | - Yukari Yoshida
- Gunma University Heavy Ion Medical Center , Gunma , Japan
| | - Qi Liu
- Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School , Boston, MA , USA
| | - Henning Willers
- Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School , Boston, MA , USA
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17
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Ferrandon S, Magné N, Battiston-Montagne P, Hau-Desbat NH, Diaz O, Beuve M, Constanzo J, Chargari C, Poncet D, Chautard E, Ardail D, Alphonse G, Rodriguez-Lafrasse C. Cellular and molecular portrait of eleven human glioblastoma cell lines under photon and carbon ion irradiation. Cancer Lett 2015; 360:10-6. [PMID: 25657111 DOI: 10.1016/j.canlet.2015.01.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 01/19/2015] [Accepted: 01/20/2015] [Indexed: 10/25/2022]
Abstract
This study aimed to examine the cellular and molecular long-term responses of glioblastomas to radiotherapy and hadrontherapy in order to better understand the biological effects of carbon beams in cancer treatment. Eleven human glioblastoma cell lines, displaying gradual radiosensitivity, were irradiated with photons or carbon ions. Independently of p53 or O(6)-methylguanine-DNA methyltransferase(1) status, all cell lines responded to irradiation by a G2/M phase arrest followed by the appearance of mitotic catastrophe, which was concluded by a ceramide-dependent-apoptotic cell death. Statistical analysis demonstrated that: (i) the SF2(2) and the D10(3) values for photon are correlated with that obtained in response to carbon ions; (ii) regardless of the p53, MGMT status, and radiosensitivity, the release of ceramide is associated with the induction of late apoptosis; and (iii) the appearance of polyploid cells after photon irradiation could predict the Relative Biological Efficiency(4) to carbon ions. This large collection of data should increase our knowledge in glioblastoma radiobiology in order to better understand, and to later individualize, appropriate radiotherapy treatment for patients who are good candidates.
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Affiliation(s)
- S Ferrandon
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - N Magné
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Départment de Radiothérapie, Institut de Cancérologie Lucien Neuwirth, 42271 St Priest-en-Jarez, France
| | - P Battiston-Montagne
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - N-H Hau-Desbat
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - O Diaz
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - M Beuve
- IPNL-LIRIS-CNRS-IN2P3, 69622 Villeurbanne, France
| | - J Constanzo
- IPNL-LIRIS-CNRS-IN2P3, 69622 Villeurbanne, France
| | - C Chargari
- Service de Radiothérapie, Hôpital du Val de Grâce, 75230 Paris, France
| | - D Poncet
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - E Chautard
- Centre Jean Perrin, Laboratoire de Radio-Oncologie Expérimentale, Clermont Université, EA7283 CREaT, Université d'Auvergne, 63011 Clermont-Ferrand, France
| | - D Ardail
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - G Alphonse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - C Rodriguez-Lafrasse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France.
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18
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Targeting head and neck cancer stem cells to overcome resistance to photon and carbon ion radiation. Stem Cell Rev Rep 2015; 10:114-26. [PMID: 23955575 DOI: 10.1007/s12015-013-9467-y] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Although promising new radiation therapy techniques such as hadrontherapy are currently being evaluated in the treatment of head and neck malignancies, local control of head and neck squamous cell carcinoma (HNSCC) remains low. Here, we investigated the involvement of cancer stem-like cells (CSCs) in a radioresistant HNSCC cell line (SQ20B). Stem-like cells SQ20B/SidePopulation(SP)/CD44(+)/ALDH(high) were more resistant to both photon and carbon ion irradiation compared with non-CSCs. This was confirmed by a BrdU labeling experiment, which suggests that CSCs were able to proliferate and to induce tumorigenicity after irradiation. SQ20B/SP/CD44(+)/ALDH(high) were capable of an extended G2/M arrest phase in response to photon or carbon ion irradiation compared with non-CSCs. Moreover, our data strongly suggest that resistance of CSCs may result from an imbalance between exacerbated self-renewal and proliferative capacities and the decrease in apoptotic cell death triggering. In order to modulate these processes, two targeted pharmacological strategies were tested. Firstly, UCN-01, a checkpoint kinase (Chk1) inhibitor, induced the relapse of G2/M arrest and radiosensitization of SQ20B-CSCs. Secondly, all-trans retinoic acid (ATRA) resulted in an inhibition of ALDH activity, and induction of the differentiation and radiosensitization of SQ20B/SP/CD44(+)/ALDH(high) cells. The combination of ATRA and UCN-01 treatments with irradiation drastically decreased the surviving fraction at 2Gy of SQ20B-CSCs from 0.85 to 0.38 after photon irradiation, and from 0.45 to 0.21 in response to carbon ions. Taken together, our results suggest that the combination of UCN-01 and ATRA represent a promising pharmacological-targeted strategy that significantly sensitizes CSCs to photon or carbon ion radiation.
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19
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Chanrion MA, Sauerwein W, Jelen U, Wittig A, Engenhart-Cabillic R, Beuve M. The influence of the local effect model parameters on the prediction of the tumor control probability for prostate cancer. Phys Med Biol 2014; 59:3019-40. [DOI: 10.1088/0031-9155/59/12/3019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Dramatic increase in oxidative stress in carbon-irradiated normal human skin fibroblasts. PLoS One 2013; 8:e85158. [PMID: 24376870 PMCID: PMC3871598 DOI: 10.1371/journal.pone.0085158] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 11/22/2013] [Indexed: 11/23/2022] Open
Abstract
Skin complications were recently reported after carbon-ion (C-ion) radiation therapy. Oxidative stress is considered an important pathway in the appearance of late skin reactions. We evaluated oxidative stress in normal human skin fibroblasts after carbon-ion vs. X-ray irradiation. Survival curves and radiobiological parameters were calculated. DNA damage was quantified, as were lipid peroxidation (LPO), protein carbonylation and antioxidant enzyme activities. Reduced and oxidized glutathione ratios (GSH/GSSG) were determined. Proinflammatory cytokine secretion in culture supernatants was evaluated. The relative biological effectiveness (RBE) of C-ions vs. X-rays was 4.8 at D0 (irradiation dose corresponding to a surviving fraction of 37%). Surviving fraction at 2 Gy (SF2) was 71.8% and 7.6% for X-rays and C-ions, respectively. Compared with X-rays, immediate DNA damage was increased less after C-ions, but a late increase was observed at D10% (irradiation dose corresponding to a surviving fraction of 10%). LPO products and protein carbonyls were only increased 24 hours after C-ions. After X-rays, superoxide dismutase (SOD) activity was strongly increased immediately and on day 14 at D0% (irradiation dose corresponding to a surviving fraction of around 0%), catalase activity was unchanged and glutathione peroxidase (GPx) activity was increased only on day 14. These activities were decreased after C-ions compared with X-rays. GSH/GSSG was unchanged after X-rays but was decreased immediately after C-ion irradiation before an increase from day 7. Secretion of IL-6 was increased at late times after X-ray irradiation. After C-ion irradiation, IL-6 concentration was increased on day 7 but was lower compared with X-rays at later times. C-ion effects on normal human skin fibroblasts seemed to be harmful in comparison with X-rays as they produce late DNA damage, LPO products and protein carbonyls, and as they decrease antioxidant defences. Mechanisms leading to this discrepancy between the two types of radiation should be investigated.
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Zygmanski P, Hoegele W, Tsiamas P, Cifter F, Ngwa W, Berbeco R, Makrigiorgos M, Sajo E. A stochastic model of cell survival for high-Z nanoparticle radiotherapy. Med Phys 2013; 40:024102. [DOI: 10.1118/1.4773885] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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22
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Hanot M, Boivin A, Malésys C, Beuve M, Colliaux A, Foray N, Douki T, Ardail D, Rodriguez-Lafrasse C. Glutathione depletion and carbon ion radiation potentiate clustered DNA lesions, cell death and prevent chromosomal changes in cancer cells progeny. PLoS One 2012. [PMID: 23185232 PMCID: PMC3502420 DOI: 10.1371/journal.pone.0044367] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Poor local control and tumor escape are of major concern in head-and-neck cancers treated by conventional radiotherapy or hadrontherapy. Reduced glutathione (GSH) is suspected of playing an important role in mechanisms leading to radioresistance, and its depletion should enable oxidative stress insult, thereby modifying the nature of DNA lesions and the subsequent chromosomal changes that potentially lead to tumor escape. This study aimed to highlight the impact of a GSH-depletion strategy (dimethylfumarate, and l-buthionine sulfoximine association) combined with carbon ion or X-ray irradiation on types of DNA lesions (sparse or clustered) and the subsequent transmission of chromosomal changes to the progeny in a radioresistant cell line (SQ20B) expressing a high endogenous GSH content. Results are compared with those of a radiosensitive cell line (SCC61) displaying a low endogenous GSH level. DNA damage measurements (γH2AX/comet assay) demonstrated that a transient GSH depletion in resistant SQ20B cells potentiated the effects of irradiation by initially increasing sparse DNA breaks and oxidative lesions after X-ray irradiation, while carbon ion irradiation enhanced the complexity of clustered oxidative damage. Moreover, residual DNA double-strand breaks were measured whatever the radiation qualities. The nature of the initial DNA lesions and amount of residual DNA damage were similar to those observed in sensitive SCC61 cells after both types of irradiation. Misrepaired or unrepaired lesions may lead to chromosomal changes, estimated in cell progeny by the cytome assay. Both types of irradiation induced aberrations in nondepleted resistant SQ20B and sensitive SCC61 cells. The GSH-depletion strategy prevented the transmission of aberrations (complex rearrangements and chromosome break or loss) in radioresistant SQ20B only when associated with carbon ion irradiation. A GSH-depleting strategy combined with hadrontherapy may thus have considerable advantage in the care of patients, by minimizing genomic instability and improving the local control.
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Affiliation(s)
- Maïté Hanot
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté de Médecine Lyon-Sud, Oullins, France
- Fondation Synergie Lyon Cancer, Lyon, France
| | - Anthony Boivin
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté de Médecine Lyon-Sud, Oullins, France
| | - Céline Malésys
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté de Médecine Lyon-Sud, Oullins, France
| | - Michaël Beuve
- Institut de Physique Nucléaire de Lyon, UMR 5822, Université Lyon 1, IN2P3/CNRS, Villeurbanne, France
| | - Anthony Colliaux
- Institut de Physique Nucléaire de Lyon, UMR 5822, Université Lyon 1, IN2P3/CNRS, Villeurbanne, France
| | - Nicolas Foray
- Institut National de la Santé et de la Recherche Médicale, U836, Groupe de Radiobiologie, Faculté de Médecine de Lyon-Sud, Oullins, France
| | - Thierry Douki
- Commissariat à l'Energie Atomique (CEA), Service de Chimie Inorganique et Biologique UMR-E 3 (CEA-UJF), Laboratoire Lésions des Acides Nucléiques, Grenoble, France
| | - Dominique Ardail
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté de Médecine Lyon-Sud, Oullins, France
| | - Claire Rodriguez-Lafrasse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté de Médecine Lyon-Sud, Oullins, France
- Unité Médicale d'Oncologie Moléculaire et Transfert, Hospices Civils Lyon, Centre de Biologie Sud, Centre Hospitalier Lyon-Sud, Pierre Bénite, France
- * E-mail:
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Ferrandon S, Saultier P, Carras J, Battiston-Montagne P, Alphonse G, Beuve M, Malleval C, Honnorat J, Slatter T, Hung N, Royds J, Rodriguez-Lafrasse C, Poncet D. Telomere profiling: toward glioblastoma personalized medicine. Mol Neurobiol 2012; 47:64-76. [PMID: 23065374 DOI: 10.1007/s12035-012-8363-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 10/01/2012] [Indexed: 02/03/2023]
Abstract
Despite a standard of care combining surgery, radiotherapy (RT), and temozolomide chemotherapy, the average overall survival (OS) of glioblastoma patients is only 15 months, and even far lower when the patient cannot benefit from this combination. Therefore, there is a strong need for new treatments, such as new irradiation techniques. Against this background, carbon ion hadrontherapy, a new kind of irradiation, leads to a greater biological response of the tumor, while minimizing adverse effects on healthy tissues in comparison with RT. As carbon ion hadrontherapy is restricted to RT-resistant patients, photon irradiation resistance biomarkers are needed. Long telomeres and high telomerase activity have been widely associated with photon radioresistance in other cancers. Moreover, telomere protection, telomere function, and telomere length (TL) also depend on the shelterin protein complex (TRF1, TRF2, TPP1, POT1, TIN2, and hRAP1). We thus decided to evaluate an enlarged telomeric status (TL, telomerase catalytic subunit, and the shelterin component expression level) as a potential radioresistance biomarker in vitro using cellular models and ex vivo using patient tumor biopsies. In addition, nothing was known about the role of telomeres in carbon ion response. We thus evaluated telomeric status after both types of irradiation. We report here a significant correlation between TL and the basal POT1 expression level and photon radioresistance, in vitro, and a significant increase in the OS of patients with long telomeres or a high POT1 level, in vivo. POT1 expression was predictive of patient response irrespective of the TL. Strikingly, these correlations were lost, in vitro, when considering carbon irradiation. We thus propose (1) a model of the implications of telomeric damage in the cell response to both types of irradiation and (2) assessment of the POT1 expression level and TL using patient tumor biopsies to identify radioresistant patients who could benefit from carbon hadrontherapy.
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Affiliation(s)
- Sylvain Ferrandon
- EMR3738, Cellular and Molecular Radiobiology Laboratory, Medicine Faculty, Lyon 1 University, 69921, Oullins Cedex 12, France
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Jones B, Underwood TSA, Dale RG. The potential impact of relative biological effectiveness uncertainty on charged particle treatment prescriptions. Br J Radiol 2012; 84 Spec No 1:S61-9. [PMID: 22374549 DOI: 10.1259/bjr/36792876] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
There continues to be uncertainty regarding the relative biological effectiveness (RBE) values that should be used in charged particle radiotherapy (CPT) prescriptions using protons and heavier ions. This uncertainty could potentially offset the physical dose advantage gained by exploiting the Bragg peak effect and it needs to be clearly understood by clinicians and physicists. This paper introduces a combined radiobiological and physical sparing factor (S). This factor includes the ratio of the most relevant physical doses in tumour and normal tissues in combination with their respective RBE values and can be extended to contain the uncertainties in RBE. S factors can be used to study, in a simplified way for tentative modelling, those clinical situations in which high-linear energy transfer (LET) irradiations are likely to prove preferable over their low-LET counterparts for a matched tumour iso-effect. In cases where CPT achieves an excellent degree of normal tissue sparing, the radiobiological factors become less important and any uncertainties in the tumour and healthy tissue RBE values are correspondingly less problematic. When less normal tissue sparing can be achieved, however, the RBE uncertainties assume greater relevance and will affect the reliability of the dose-prescription methodology. More research is required to provide accurate RBE estimation, focusing attention on the associated statistical uncertainties and potential differences in RBE between different tissue types.
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Affiliation(s)
- B Jones
- Gray Institute for Radiation Oncology and Biology, University of Oxford, Headington, Oxford, UK.
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Jones B, Underwood TSA, Carabe-Fernandez A, Timlin C, Dale RG. Fast neutron relative biological effects and implications for charged particle therapy. Br J Radiol 2012; 84 Spec No 1:S11-8. [PMID: 22374547 DOI: 10.1259/bjr/67509851] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
In two fast neutron data sets, comprising in vitro and in vivo experiments, an inverse relationship is found between the low-linear energy transfer (LET) α/β ratio and the maximum value of relative biological effect (RBE(max)), while the minimum relative biological effect (RBE(min)) is linearly related to the square root of the low-LET α/β ratio. RBE(max) is the RBE at near zero dose and can be represented by the ratio of the α parameters at high- and low-LET radiation exposures. RBE(min) is the RBE at very high dose and can be represented by the ratio of the square roots of the β parameters at high- and low-LET radiation exposures. In principle, it may be possible to use the low-LET α/β ratio to predict RBE(max) and RBE(min, )providing that other LET-related parameters, which reflect intercept and slopes of these relationships, are used. These two limits of RBE determine the intermediate values of RBE at any dose per fraction; therefore, it is possible to find the RBE at any dose per fraction. Although these results are obtained from fast neutron experiments, there are implications for charged particle therapy using protons (when RBE is scaled downwards) and for heavier ion beams (where the magnitude of RBE is similar to that for fast neutrons). In the case of fast neutrons, late reacting normal tissue systems and very slow growing tumours, which have the smallest values of the low-LET α/β ratio, are predicted to have the highest RBE values at low fractional doses, but the lowest values of RBE at higher doses when they are compared with early reacting tissues and fast growing tumour systems that have the largest low-LET α/β ratios.
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Affiliation(s)
- B Jones
- Gray Institute for Radiation Oncology and Biology, University of Oxford, Headington, Oxford, UK.
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Calugaru V, Nauraye C, Noël G, Giocanti N, Favaudon V, Mégnin-Chanet F. Radiobiological characterization of two therapeutic proton beams with different initial energy spectra used at the Institut Curie Proton Therapy Center in Orsay. Int J Radiat Oncol Biol Phys 2010; 81:1136-43. [PMID: 21075549 DOI: 10.1016/j.ijrobp.2010.09.003] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 09/01/2010] [Accepted: 09/15/2010] [Indexed: 11/24/2022]
Abstract
PURPOSE Treatment planning in proton therapy uses a generic value for the relative biological efficiency (RBE) of 1.1 throughout the spread-out Bragg peak (SOBP) generated. In this article, we report on the variation of the RBE with depth in the SOBP of the 76- and 201-MeV proton beams used for treatment at the Institut Curie Proton Therapy Center in Orsay. METHODS AND MATERIALS The RBE (relative to (137)Cs γ-rays) of the two modulated proton beams at three positions in the SOBP was determined in two human tumor cells using as endpoints clonogenic cell survival and the incidence of DNA double-strand breaks (DSBs) as measured by pulse-field gel electrophoresis without and with enzymatic treatment to reveal clustered lesions. RESULTS The RBE for induced cell killing by the 76-MeV beam increased with depth in the SOBP. However for the 201-MeV protons, it was close to that for (137)Cs γ-rays and did not vary significantly. The incidence of DSBs and clustered lesions was higher for protons than for (137)Cs γ-rays, but did not depend on the proton energy or the position in the SOBP. CONCLUSIONS Until now, little attention has been paid to the variation of RBE with depth in the SOBP as a function of the nominal energy of the primary proton beam and the molecular nature of the DNA damage. The RBE increase in the 76-MeV SOBP implies that the tumor tissues at the distal end receives a higher biologically equivalent dose than at the proximal end, despite a homogeneous physical dose. This is not the case for the 201-MeV energy beam. The precise determination of the effects of incident beam energy, modulation, and depth in tissues on the linear energy transfer-RBE relationship is essential for treatment planning.
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28
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Beuve M. Formalization and Theoretical Analysis of the Local Effect Model. Radiat Res 2009; 172:394-402. [DOI: 10.1667/rr1544.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
The clinical results of carbon ion therapy pioneered in Japan remain promising, especially in a wide range of cancers that are difficult to treat using X-rays. As well as producing impressive tumour control rates, there appears to be a marked reduction in radiation-related toxicity, as would be expected from the advantageous dose distributions. There remain some controversial research-related issues, such as the radiobiological conversion methods, dose fractionation, and which form of accelerator systems and treatment delivery systems should be used. Cost is a major issue, which is being addressed by the use of far fewer treatments than with X-ray therapy. The expansion of this form of treatment in Japan and mainland Europe will provide opportunities for a large research portfolio, which is necessary to optimise this kinder form of radiotherapy.
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Aggarwal V. An In Vitro Evaluation of Effect of Ionizing Radiotherapy on Push-out Strength of Fiber Posts under Cyclic Loading. J Endod 2009; 35:695-8. [DOI: 10.1016/j.joen.2009.01.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Revised: 01/18/2009] [Accepted: 01/28/2009] [Indexed: 10/20/2022]
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Maalouf M, Alphonse G, Colliaux A, Beuve M, Trajkovic-Bodennec S, Battiston-Montagne P, Testard I, Chapet O, Bajard M, Taucher-Scholz G, Fournier C, Rodriguez-Lafrasse C. Different Mechanisms of Cell Death in Radiosensitive and Radioresistant P53 Mutated Head and Neck Squamous Cell Carcinoma Cell Lines Exposed to Carbon Ions and X-Rays. Int J Radiat Oncol Biol Phys 2009; 74:200-9. [DOI: 10.1016/j.ijrobp.2009.01.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Revised: 01/09/2009] [Accepted: 01/13/2009] [Indexed: 11/25/2022]
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