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Le Reun E, Granzotto A, Pêtre A, Bodgi L, Beldjoudi G, Lacornerie T, Vallet V, Bouchet A, Al-Choboq J, Bourguignon M, Thariat J, Bourhis J, Lartigau E, Foray N. Influence of the Hypersensitivity to Low Dose Phenomenon on the Tumor Response to Hypofractionated Stereotactic Body Radiation Therapy. Cancers (Basel) 2023; 15:3979. [PMID: 37568795 PMCID: PMC10416967 DOI: 10.3390/cancers15153979] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 07/30/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023] Open
Abstract
Stereotactic body radiation therapy (SBRT) has made the hypofractionation of high doses delivered in a few sessions more acceptable. While the benefits of hypofractionated SBRT have been attributed to additional vascular, immune effects, or specific cell deaths, a radiobiological and mechanistic model is still needed. By considering each session of SBRT, the dose is divided into hundreds of minibeams delivering some fractions of Gy. In such a dose range, the hypersensitivity to low dose (HRS) phenomenon can occur. HRS produces a biological effect equivalent to that produced by a dose 5-to-10 times higher. To examine whether HRS could contribute to enhancing radiation effects under SBRT conditions, we exposed tumor cells of different HRS statuses to SBRT. Four human HRS-positive and two HRS-negative tumor cell lines were exposed to different dose delivery modes: a single dose of 0.2 Gy, 2 Gy, 10 × 0.2 Gy, and a single dose of 2 Gy using a non-coplanar isocentric minibeams irradiation mode were delivered. Anti-γH2AX immunofluorescence, assessing DNA double-strand breaks (DSB), was applied. In the HRS-positive cells, the DSB produced by 10 × 0.2 Gy and 2 Gy, delivered by tens of minibeams, appeared to be more severe, and they provided more highly damaged cells than in the HRS-negative cells, suggesting that more severe DSB are induced in the "SBRT modes" conditions when HRS occurs in tumor. Each SBRT session can be viewed as hyperfractionated dose delivery by means of hundreds of low dose minibeams. Under current SBRT conditions (i.e., low dose per minibeam and not using ultra-high dose-rate), the response of HRS-positive tumors to SBRT may be enhanced significantly. Interestingly, similar conclusions were reached with HRS-positive and HRS-negative untransformed fibroblast cell lines, suggesting that the HRS phenomenon may also impact the risk of post-RT tissue overreactions.
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Affiliation(s)
- Eymeric Le Reun
- U1296 Unit, “Radiation: Defense, Health and Environment”, Centre Léon-Bérard, Inserm, 28 Rue Laennec, 69008 Lyon, France; (E.L.R.); (A.G.); (A.P.); (A.B.); (J.A.-C.); (M.B.)
- Service de Radio-Oncologie, Centre Hospitalier Universitaire Vaudois (CHUV), 46 Rue du Bugnon, 1011 Lausanne, Switzerland; (V.V.); (J.B.)
| | - Adeline Granzotto
- U1296 Unit, “Radiation: Defense, Health and Environment”, Centre Léon-Bérard, Inserm, 28 Rue Laennec, 69008 Lyon, France; (E.L.R.); (A.G.); (A.P.); (A.B.); (J.A.-C.); (M.B.)
| | - Adeline Pêtre
- U1296 Unit, “Radiation: Defense, Health and Environment”, Centre Léon-Bérard, Inserm, 28 Rue Laennec, 69008 Lyon, France; (E.L.R.); (A.G.); (A.P.); (A.B.); (J.A.-C.); (M.B.)
- Département de Radiothérapie, Centre Léon-Bérard, 28 Rue Laennec, 69008 Lyon, France;
| | - Larry Bodgi
- Department of Radiation Oncology, American University of Beirut Medical Center, Riad El-Solh, Beirut 1107-2020, Lebanon;
| | - Guillaume Beldjoudi
- Département de Radiothérapie, Centre Léon-Bérard, 28 Rue Laennec, 69008 Lyon, France;
| | - Thomas Lacornerie
- Département de Radiothérapie, Centre Oscar-Lambret, 3 Rue Frédéric Combemale, 59000 Lille, France; (T.L.); (E.L.)
| | - Véronique Vallet
- Service de Radio-Oncologie, Centre Hospitalier Universitaire Vaudois (CHUV), 46 Rue du Bugnon, 1011 Lausanne, Switzerland; (V.V.); (J.B.)
| | - Audrey Bouchet
- U1296 Unit, “Radiation: Defense, Health and Environment”, Centre Léon-Bérard, Inserm, 28 Rue Laennec, 69008 Lyon, France; (E.L.R.); (A.G.); (A.P.); (A.B.); (J.A.-C.); (M.B.)
| | - Joëlle Al-Choboq
- U1296 Unit, “Radiation: Defense, Health and Environment”, Centre Léon-Bérard, Inserm, 28 Rue Laennec, 69008 Lyon, France; (E.L.R.); (A.G.); (A.P.); (A.B.); (J.A.-C.); (M.B.)
| | - Michel Bourguignon
- U1296 Unit, “Radiation: Defense, Health and Environment”, Centre Léon-Bérard, Inserm, 28 Rue Laennec, 69008 Lyon, France; (E.L.R.); (A.G.); (A.P.); (A.B.); (J.A.-C.); (M.B.)
- Département de Biophysique et Médecine Nucléaire, Université Paris Saclay, Versailles St. Quentin en Yvelines, 78035 Versailles, France
| | - Juliette Thariat
- Département de Radiothérapie, Centre François-Baclesse, 3 Avenue du Général Harris, 14076 Caen, France;
| | - Jean Bourhis
- Service de Radio-Oncologie, Centre Hospitalier Universitaire Vaudois (CHUV), 46 Rue du Bugnon, 1011 Lausanne, Switzerland; (V.V.); (J.B.)
| | - Eric Lartigau
- Département de Radiothérapie, Centre Oscar-Lambret, 3 Rue Frédéric Combemale, 59000 Lille, France; (T.L.); (E.L.)
| | - Nicolas Foray
- U1296 Unit, “Radiation: Defense, Health and Environment”, Centre Léon-Bérard, Inserm, 28 Rue Laennec, 69008 Lyon, France; (E.L.R.); (A.G.); (A.P.); (A.B.); (J.A.-C.); (M.B.)
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Hu P, Huang J, Zhang Y, Guo H, Chen G, Zhang F. Iodine-125 seed implantation in the treatment of malignant tumors. J Interv Med 2023; 6:111-115. [PMID: 37846333 PMCID: PMC10577067 DOI: 10.1016/j.jimed.2023.07.006] [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: 04/25/2023] [Revised: 07/16/2023] [Accepted: 07/17/2023] [Indexed: 10/18/2023] Open
Abstract
Malignant tumors are major causes of morbidity and mortality in China. Despite advances in surgical, radiological, chemotherapeutic, molecular targeting, and immunotherapeutic treatments, patients with malignant tumors still have poor prognoses. Low-dose-rate brachytherapy, specifically 125I seed implantation, is beneficial because of its high local delivery dose and minimal damage to surrounding tissues. Consequently, it has gained increasing acceptance as a treatment modality for various malignant tumors. In this study, we explored the fundamental principles, clinical applications, and new technologies associated with 125I radioactive seed implantation.
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Affiliation(s)
- Pan Hu
- Department of Minimally Invasive & Interventional Radiology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 651 Dongfeng Road East, Guangzhou, Guangdong, 510060, People’s Republic of China
| | - Jianwen Huang
- Department of Intervention, Zhuhai People’s Hospital, Zhuhai, Guangdong, 519000, People’s Republic of China
| | - Yanling Zhang
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, 510515, People’s Republic of China
| | - Huanqing Guo
- Department of Minimally Invasive & Interventional Radiology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 651 Dongfeng Road East, Guangzhou, Guangdong, 510060, People’s Republic of China
| | - Guanyu Chen
- Department of Minimally Invasive & Interventional Radiology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 651 Dongfeng Road East, Guangzhou, Guangdong, 510060, People’s Republic of China
| | - Fujun Zhang
- Department of Minimally Invasive & Interventional Radiology, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 651 Dongfeng Road East, Guangzhou, Guangdong, 510060, People’s Republic of China
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Mathur A, Chinnadurai V, Bhalla PJS, Chandna S. Induction of epithelial-mesenchymal transition in thyroid follicular cells is associated with cell adhesion alterations and low-dose hyper-radiosensitivity. Tumour Biol 2023; 45:95-110. [PMID: 37742670 DOI: 10.3233/tub-220027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023] Open
Abstract
BACKGROUND Epithelial-mesenchymal transition (EMT) is associated with altered cellular adhesion. We previously demonstrated that cellular adhesion influences Low-dose Hyper-Radiosensitivity (HRS) in a variety of tumor cells. However, the relationship of low-dose HRS with the phenotypic plasticity incurred by EMT during the neoplastic transformation remains to be elucidated. OBJECTIVE To investigate whether acquisition of EMT phenotype during progressive neoplastic transformation may affect low-dose radiation sensitivity. METHODS Primary thyroid cells obtained from a human cystic thyroid nodule were first subjected to nutritional stress. This yielded immortalized INM-Thy1 cell strain, which was further treated with either multiple γ-radiation fractions (1.5 Gy each) or repetitive cycles of 3-methylcholanthrene and phorbol-12-myristate-13-acetate, yielding two progressive transformants, viz., INM-Thy1R and INM-Thy1C. Morphological alterations, chromosomal double-minutes, cell adhesion proteins, anchorage dependency, tumorigenicity in nude mice and cellular radiosensitivity were studied in these strains. RESULTS Both transformants (INM-Thy1R, INM-Thy1C) displayed progressive tumorigenic features, viz., soft agar colony growth and solid tumor growth in nude mice, coupled with features of epithelial-mesenchymal transition and activated Wnt pathway. Incidentally, the chemical-induced transformant (INM-Thy1C) displayed a prominent HRS (αs/αr = 29.35) which remained unaffected at high cell density. However, the parental (INM-Thy1) cell line as well as radiation-induced transformant (INM-Thy1R) failed to show this hypersensitivity. CONCLUSION The study shows that induction of EMT in thyroid follicular cells may accompany increased susceptibility to low-dose ionizing radiation, which was attenuated by adaptive resistance acquired during radiation-induced transformation.
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Affiliation(s)
- Ankit Mathur
- Division of Radiation Biosciences, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road, Timarpur, Delhi, India
| | - Vijayakumar Chinnadurai
- Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road, Timarpur, Delhi, India
| | - Param Jit Singh Bhalla
- Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road, Timarpur, Delhi, India
| | - Sudhir Chandna
- Division of Radiation Biosciences, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road, Timarpur, Delhi, India
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Polgár S, Schofield PN, Madas BG. Datasets of in vitro clonogenic assays showing low dose hyper-radiosensitivity and induced radioresistance. Sci Data 2022; 9:555. [PMID: 36075916 PMCID: PMC9458642 DOI: 10.1038/s41597-022-01653-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 08/19/2022] [Indexed: 11/19/2022] Open
Abstract
Low dose hyper-radiosensitivity and induced radioresistance are primarily observed in surviving fractions of cell populations exposed to ionizing radiation, plotted as the function of absorbed dose. Several biophysical models have been developed to quantitatively describe these phenomena. However, there is a lack of raw, openly available experimental data to support the development and validation of quantitative models. The aim of this study was to set up a database of experimental data from the public literature. Using Google Scholar search, 46 publications with 101 datasets on the dose-dependence of surviving fractions, with clear evidence of low dose hyper-radiosensitivity, were identified. Surviving fractions, their uncertainties, and the corresponding absorbed doses were digitized from graphs of the publications. The characteristics of the cell line and the irradiation were also recorded, along with the parameters of the linear-quadratic model and/or the induced repair model if they were provided. The database is available in STOREDB, and can be used for meta-analysis, for comparison with new experiments, and for development and validation of biophysical models. Measurement(s) | surviving fraction of cells | Technology Type(s) | optical microscopy | Factor Type(s) | absorbed dose | Sample Characteristic - Organism | Homo sapiens • Chinese hamster • Rattus sp. | Sample Characteristic - Environment | cell culture |
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Affiliation(s)
- Szabolcs Polgár
- Doctoral School of Physics, ELTE Eötvös Loránd University, Budapest, Hungary.,Environmental Physics Department, Centre for Energy Research, Budapest, Hungary
| | - Paul N Schofield
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom
| | - Balázs G Madas
- Environmental Physics Department, Centre for Energy Research, Budapest, Hungary. .,Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Budapest, Hungary.
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Wei S, Li C, Li M, Xiong Y, Jiang Y, Sun H, Qiu B, Lin CJ, Wang J. Radioactive Iodine-125 in Tumor Therapy: Advances and Future Directions. Front Oncol 2021; 11:717180. [PMID: 34660280 PMCID: PMC8514864 DOI: 10.3389/fonc.2021.717180] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 09/07/2021] [Indexed: 12/11/2022] Open
Abstract
Radioactive iodine-125 (I-125) is the most widely used radioactive sealed source for interstitial permanent brachytherapy (BT). BT has the exceptional ability to deliver extremely high doses that external beam radiotherapy (EBRT) could never achieve within treated lesions, with the added benefit that doses drop off rapidly outside the target lesion by minimizing the exposure of uninvolved surrounding normal tissue. Spurred by multiple biological and technological advances, BT application has experienced substantial alteration over the past few decades. The procedure of I-125 radioactive seed implantation evolved from ultrasound guidance to computed tomography guidance. Compellingly, the creative introduction of 3D-printed individual templates, BT treatment planning systems, and artificial intelligence navigator systems remarkably increased the accuracy of I-125 BT and individualized I-125 ablative radiotherapy. Of note, utilizing I-125 to treat carcinoma in hollow cavity organs was enabled by the utility of self-expandable metal stents (SEMSs). Initially, I-125 BT was only used in the treatment of rare tumors. However, an increasing number of clinical trials upheld the efficacy and safety of I-125 BT in almost all tumors. Therefore, this study aims to summarize the recent advances of I-125 BT in cancer therapy, which cover experimental research to clinical investigations, including the development of novel techniques. This review also raises unanswered questions that may prompt future clinical trials and experimental work.
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Affiliation(s)
- Shuhua Wei
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
| | - Chunxiao Li
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
| | - Mengyuan Li
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
| | - Yan Xiong
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
| | - Yuliang Jiang
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
| | - Haitao Sun
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
| | - Bin Qiu
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
| | | | - Junjie Wang
- Department of Radiation Oncology, Peking University 3rd Hospital, Beijing, China
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Ngoi NYL, Heong V, Tang JI, Choo BA, Kumarakulasinghe NB, Lim D, Low M, Lim SE, Lim YW, Leong YH, Tseng M, Tong PSY, Ilancheran A, Low JJH, Ng J, Thian YL, Koh V, Tan DSP. Phase 1 Study of Low-Dose Fractionated Whole Abdominal Radiation Therapy in Combination With Weekly Paclitaxel for Platinum-Resistant Ovarian Cancer (GCGS-01). Int J Radiat Oncol Biol Phys 2020; 109:701-711. [PMID: 33045316 DOI: 10.1016/j.ijrobp.2020.09.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/24/2020] [Accepted: 09/30/2020] [Indexed: 12/24/2022]
Abstract
PURPOSE Low-dose fractionated whole abdominal radiation therapy (LDFWART) has synergistic activity with paclitaxel in preclinical models. The aim of this phase 1 trial was to determine the recommended phase 2 dose and preliminary activity of weekly paclitaxel (wP) concurrent with LDFWART in patients with platinum-resistant ovarian cancer (PROC). METHODS AND MATERIALS Patients were enrolled at de-escalating dose levels of wP (part A), starting at 80 mg/m2, concurrent with fixed-dose LDFWART delivered in 60 cGy fractions twice-daily, 2 days per week, for 6 continuous weeks. After completing the 6-week course of wP + LDFWART, patients received wP until disease progression. Dose-limiting toxicity was evaluated during the first 3 weeks of wP + LDFWART. At wP (80 mg/m2) + LDFWART, no dose-limiting toxicities were observed; this was the established maximum tolerated dose. The trial was expanded (part B) with 7 additional patients with platinum-resistant, high-grade serous ovarian cancer to confirm toxicity and activity. RESULTS A total of 10 heavily pretreated patients were recruited (3 patients to part A, 7 patients to part B). They had received a median of 5 prior lines of therapy, and 70% of patients had received prior wP; 60% of patients completed 6 weeks of wP + LDFWART. Common related grade ≥3 adverse events were neutropenia (60%) and anemia (30%). Median progression-free survival was 3.2 months, and overall survival was 13.5 months. Of patients evaluable for response, 33% (3 of 9) achieved confirmed biochemical response (CA125 decrease >50% from baseline), 11% (1) achieved a partial response, and 5 patients had stable disease, giving a disease control rate of 66.7% (6 of 9). Four patients had durable disease control of ≥12 weeks, completing 12 to 21 weeks of wP. CONCLUSIONS The recommended phase 2 dose of wP + LDFWART for 6 weeks is 80 mg/m2. Encouraging efficacy in heavily pretreated PROC patients was observed, suggesting that further development of this therapeutic strategy in PROC should be considered.
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Affiliation(s)
- Natalie Y L Ngoi
- Department of Haematology-Oncology, National University Cancer Institute, Singapore
| | - Valerie Heong
- Department of Medical Oncology, Tan Tock Seng Hospital, Singapore
| | - Johann I Tang
- Department of Radiation Oncology, National University Cancer Institute, Singapore
| | - Bok Ai Choo
- Department of Radiation Oncology, National University Cancer Institute, Singapore
| | | | - Diana Lim
- Department of Pathology, National University Health System, Singapore
| | - Mellisa Low
- Department of Haematology-Oncology, National University Cancer Institute, Singapore
| | - Siew Eng Lim
- Department of Haematology-Oncology, National University Cancer Institute, Singapore
| | - Yi Wan Lim
- Department of Haematology-Oncology, National University Cancer Institute, Singapore
| | - Yiat Horng Leong
- Department of Radiation Oncology, National University Cancer Institute, Singapore
| | - Michelle Tseng
- Department of Radiation Oncology, National University Cancer Institute, Singapore
| | - Pearl S Y Tong
- Division of Gynaecologic-Oncology, Department of Obstetrics and Gynaecology, National University Health System, Singapore
| | - Arunachalam Ilancheran
- Division of Gynaecologic-Oncology, Department of Obstetrics and Gynaecology, National University Health System, Singapore
| | - Jeffrey J H Low
- Division of Gynaecologic-Oncology, Department of Obstetrics and Gynaecology, National University Health System, Singapore
| | - Joseph Ng
- Division of Gynaecologic-Oncology, Department of Obstetrics and Gynaecology, National University Health System, Singapore
| | - Yee Liang Thian
- Department of Diagnostic Imaging, National University Health System, Singapore
| | - Vicky Koh
- Department of Radiation Oncology, National University Cancer Institute, Singapore
| | - David S P Tan
- Department of Haematology-Oncology, National University Cancer Institute, Singapore; Cancer Science Institute, National University of Singapore, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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Mathur A, Kumar A, Babu B, Chandna S. In vitro mesenchymal-epithelial transition in NIH3T3 fibroblasts results in onset of low-dose radiation hypersensitivity coupled with attenuated connexin-43 response. Biochim Biophys Acta Gen Subj 2017; 1862:414-426. [PMID: 29154903 DOI: 10.1016/j.bbagen.2017.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 10/21/2017] [Accepted: 11/13/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND Mesenchymal-to-epithelial transition (MET) is associated with altered cell adhesion patterns. Independent studies showed that cellular adhesion regulates low-dose hyper-radiosensitivity (HRS), a phenomenon reported widely in tumour cells. Therefore, present study aimed to investigate whether MET and associated cellular adhesion alterations affect cellular radiosensitivity. METHODS We established multiple stages of MET by in vitro transformation of NIH3T3 mouse embryonic fibroblasts. Nutritional deprivation followed by repetitive treatment cycles of 3-methylcholanthrene and phorbol-12-myristate-13-acetate with frequent isolation of foci established three progressive strains (NIH3T3.1, NIH3T3x3, NIH3T3x8x3) depicting MET, and one strain (NIH3T3x12) with partial reversion. Alterations in morphology, cell adhesion properties, expression/intracellular localization of cell adhesion proteins, microRNA expression and cellular radiosensitivity were studied in these stably transformed cell strains. RESULTS All four transformants had increased proliferation rate, saturation density, bipolarity, E-cadherin expression; coupled with reduced cell size/spreading, pseudopodia/migration, and fibroblast marker protein and vimentin. The most aggressive trans-differentiated (phenotypically epithelial) cell strain, NIH3T3x8x3 acquired ~30% higher growth potential associated with more than two-fold reduction in cell size and migration. These phenotypic changes accompanied ~40% reduction in endogenous or radiation-induced connexin-43 expression/mitochondrial translocation. Incidentally, all three progressive strains displayed prominent HRS (αs/αr: 7.95-37.29) whereas parental (NIH3T3) and reverting (NIH3T3x12) strains lacked HRS and had distinct radiation-induced Cx43 translocation into mitochondria. CONCLUSION Our study shows that trans-differentiating fibroblasts progressively acquiring epithelial features during MET process, display low-dose hyper-radiosensitivity associated with altered Cx43 behaviour. GENERAL SIGNIFICANCE This study demonstrates that MET progression triggers low-dose hyper-radiosensitivity in trans-differentiating cells, which has significant therapeutic implications.
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Affiliation(s)
- Ankit Mathur
- Division of Natural Radiation Response Mechanisms, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road,Timarpur, Delhi 110054, India
| | - Ashish Kumar
- Division of Natural Radiation Response Mechanisms, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road,Timarpur, Delhi 110054, India
| | - Bincy Babu
- Division of Natural Radiation Response Mechanisms, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road,Timarpur, Delhi 110054, India
| | - Sudhir Chandna
- Division of Natural Radiation Response Mechanisms, Institute of Nuclear Medicine and Allied Sciences, Brig. S.K. Mazumdar Road,Timarpur, Delhi 110054, India.
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Terashima S, Hosokawa Y, Tsuruga E, Mariya Y, Nakamura T. Impact of time interval and dose rate on cell survival following low-dose fractionated exposures. JOURNAL OF RADIATION RESEARCH 2017; 58:782-790. [PMID: 28595296 PMCID: PMC5710595 DOI: 10.1093/jrr/rrx025] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 03/08/2017] [Indexed: 05/23/2023]
Abstract
Enhanced cell lethality, also known as hyper-radiosensitivity, has been reported at low doses of radiation (≤0.5 Gy) in various cell lines, and is expected to be an effective cancer therapy. We conducted this study to examine the impact of time interval and dose rate of low-dose fractionated exposures with a short time interval. We evaluated the cell-survival rates of V79 and A549 cells using clonogenic assays. We performed fractionated exposures in unit doses of 0.25, 0.5, 1.0 and 2.0 Gy. We exposed the cells to 2 Gy of X-rays (i) at dose-rates of 1.0, 1.5 and 2.0 Gy/min at 1-min intervals and (ii) at a dose-rate of 2.0 Gy/min at 10-s, 1-min and 3-min intervals by fractionated exposures. Apoptosis and cell cycle analyses were also evaluated in the fractionated exposures (unit dose 0.25 Gy) and compared with single exposures by using flow cytometry. Both cell-type survival rates with fractionated exposures (unit dose 0.25 Gy) with short time intervals were markedly lower than those for single exposures delivering the same dose. When the dose rates were lower, the cytotoxic effect decreased compared with exposure to a dose-rate of 2.0 Gy/min. On the other hand, levels of apoptosis and cell cycle distribution were not significantly different between low-dose fractionated exposures and single exposures in either cell line. These results indicate that a stronger cytotoxic effect was induced with low-dose fractionated exposures with a short time interval for a given dose due to the hyper-radiosensitivity phenomenon, suggesting that dose rates are important for effective low-dose fractionated exposures.
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Affiliation(s)
- Shingo Terashima
- Department of Radiation Science, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
| | - Yoichiro Hosokawa
- Department of Radiation Science, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
| | - Eichi Tsuruga
- Department of Radiation Science, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
| | - Yasushi Mariya
- Department of Radiology, Mutsu General Hospital, 1-2-8 Kogawa-cho, Mutsu, Aomori 035-8601, Japan
| | - Toshiya Nakamura
- Department of Bioscience and Laboratory Medicine, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
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9
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Hanu C, Wong R, Sur RK, Hayward JE, Seymour C, Mothersill C. Low-dose non-targeted radiation effects in human esophageal adenocarcinoma cell lines. Int J Radiat Biol 2016; 93:165-173. [PMID: 27653785 DOI: 10.1080/09553002.2017.1237057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PURPOSE To investigate non-targeted radiation effects in esophageal adenocarcinoma cell lines (OE19 and OE33) using human keratinocyte and colorectal cancer cell reporters following γ-ray exposure. MATERIALS AND METHODS Both clonogenic assays and ratiometric calcium endpoints were used to check for the occurrence of bystander signals in reporter cells. RESULTS We report data suggesting that γ-irradiation increases cell killing over the expected linear quadratic (LQ) model levels in the OE19 cell line exposed to doses below 1 Gy, i.e. which may be suggestive to be a low hyper-radiosensitive (HRS) response to direct irradiation. Both EAC cell lines (OE19 and OE33) have the ability to produce bystander signals when irradiated cell conditioned medium (ICCM) is placed onto human keratinocyte reporters, but do not seem to be capable of responding to bystander signals when placed on their autologous reporters. Further work with human keratinocyte reporter models showed statistically significant intracellular calcium fluxes following exposure of the reporters to ICCM harvested from both EAC cell lines exposed to 0.5 Gy. CONCLUSION These experiments suggest that the OE19 and OE33 cell lines produce bystander signals in human keratinocyte reporter cells. However, the radiosensitivity of the EAC cell lines used in this study cannot be enhanced by the bystander response since both cell lines could not respond to bystander signals.
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Affiliation(s)
- Christine Hanu
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada
| | - Raimond Wong
- b Department of Oncology and McMaster University , Hamilton , ON , Canada
| | - Ranjan K Sur
- b Department of Oncology and McMaster University , Hamilton , ON , Canada
| | - Joseph E Hayward
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada.,c Department of Radiology , McMaster University , Hamilton , ON , Canada
| | - Colin Seymour
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada
| | - Carmel Mothersill
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada
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10
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Viau M, Perez AF, Bodgi L, Devic C, Granzotto A, Ferlazzo ML, Bourguignon M, Puisieux A, Lacornerie T, Lartigau É, Lagrange JL, Foray N. [Repeated radiation dose effect and DNA repair: Importance of the individual factor and the time interval between the doses]. Cancer Radiother 2016; 20:217-25. [PMID: 27020715 DOI: 10.1016/j.canrad.2015.05.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/09/2015] [Accepted: 05/12/2015] [Indexed: 11/19/2022]
Abstract
The dose fractionation effect is a recurrent question of radiation biology research that remains unsolved since no model predicts the clinical effect only with the cumulated dose and the radiobiology of irradiated tissues. Such an important question is differentially answered in radioprotection, radiotherapy, radiology or epidemiology. A better understanding of the molecular response to radiation makes possible today a novel approach to identify the parameters that condition the fractionation effect. Particularly, the time between doses appears to be a key factor since it will permit, or not, the repair of certain radiation-induced DNA damages whose repair rates are of the order of seconds, minutes or hours: the fractionation effect will therefore vary according to the functionality of the different repair pathways, whatever for tumor or normal tissues.
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Affiliation(s)
- M Viau
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France
| | - A-F Perez
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France
| | - L Bodgi
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France
| | - C Devic
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France
| | - A Granzotto
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France
| | - M L Ferlazzo
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France
| | - M Bourguignon
- Institut de radioprotection et sûreté nucléaire, BP 17, 92260 Fontenay-aux-Roses, France
| | - A Puisieux
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France
| | - T Lacornerie
- Département de radiothérapie, centre Oscar-Lambret, ONCOLille, université de Lille, 3, rue Frédéric-Combemale, 59000 Lille, France
| | - É Lartigau
- Département de radiothérapie, centre Oscar-Lambret, ONCOLille, université de Lille, 3, rue Frédéric-Combemale, 59000 Lille, France
| | - J-L Lagrange
- Département de radiothérapie, CHU Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94010 Créteil, France
| | - N Foray
- Inserm, UMR1052, centre de recherches en cancérologie de Lyon, 28, rue Laennec, 69008 Lyon, France.
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11
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Xue L, Furusawa Y, Yu D. ATR signaling cooperates with ATM in the mechanism of low dose hypersensitivity induced by carbon ion beam. DNA Repair (Amst) 2015; 34:1-8. [PMID: 26246317 DOI: 10.1016/j.dnarep.2015.07.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 07/04/2015] [Accepted: 07/14/2015] [Indexed: 02/04/2023]
Abstract
Little work has been done on the mechanism of low dose hyper-radiosensitivity (HRS) and later appeared radioresistance (termed induced radioresistance (IRR)) after irradiation with medium and high linear energy transfer (LET) particles. The aim of this study was to find out whether ATR pathway is involved in the mechanism of HRS induced by high LET radiation. GM0639 cells and two ATM deficient/mutant cells, AT5BIVA and AT2KY were irradiated by carbon ion beam. Thymidine block technique was developed to enrich the G2-phase population. Radiation induced early G2/M checkpoint was quantitatively assess with dual-parameter flow cytometry by detecting the cells positive for phospho-histone H3. The involvement of ATR pathway in HRS/IRR response was detected with pretreatment of specific inhibitors prior to carbon ion beam. The link between the early G2/M checkpoint and HRS/IRR under carbon ion beam was first confirmed in GM0639 cells, through the enrichment of cell population in G2-phase or with Aurora kinase inhibitor that attenuates the transition from G2 to M phase. Interestingly, the early G2/M arrest could still be observed in ATM deficient/mutant cells with an effect of ATR signaling, which was discovered to function in an LET-dependent manner, even as low as 0.2Gy for carbon ion radiation. The involvement of ATR pathway in heavy particles induced HRS/IRR was determined with the specific ATR inhibitor in GM0639 cells, which affected the HRS/IRR occurrence similarly as ATM inhibitor. These data demonstrate that ATR pathway may cooperate with ATM in the mechanism of low dose hypersensitivity induced by carbon ion beam.
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Affiliation(s)
- Lian Xue
- School of Public Health, Medical College of Soochow University, Suzhou, China; Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Soochow University, Suzhou, China
| | - Yoshiya Furusawa
- Microbeam Development Office, Research/Development/Support Center, National Institute of Radiological Sciences, Chiba, Japan
| | - Dong Yu
- School of Radiological Medicine and Protection, Medical College of Soochow University, Suzhou, China.
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12
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Perez AF, Devic C, Colin C, Foray N. [The low doses of radiation: Towards a new reading of the risk assessment]. Bull Cancer 2015; 102:527-38. [PMID: 25959519 DOI: 10.1016/j.bulcan.2015.03.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 03/29/2015] [Indexed: 11/16/2022]
Abstract
From Hiroshima bomb explosion data, the risk of radiation-induced cancer is significant from 100 mSv for a population considered as uniform and radioresistant. However, the recent radiobiological data bring some new elements that highlight some features that were not taken into account: the individual factor, the dose rate and the repeated dose effect. The objective evaluation of the cancer risk due to doses lower than 100 mSv is conditioned by high levels of measurability and statistical significance. However, it appears that methodological rigor is not systematically applied in all the papers. Furthermore, unclear communication in press often leads to some announcement effects, which does not improve the readability of the issue. This papers aims to better understand the complexity of the low-dose-specific phenomena as a whole, by confronting the recent biological data with epidemiological data.
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Affiliation(s)
- Anne-Fleur Perez
- Centre de recherche en cancérologie de Lyon, groupe de radiobiologie, Inserm, UMR 1052, bâtiment Cheney A, rue Laennec, 69008 Lyon, France
| | - Clément Devic
- Centre de recherche en cancérologie de Lyon, groupe de radiobiologie, Inserm, UMR 1052, bâtiment Cheney A, rue Laennec, 69008 Lyon, France
| | - Catherine Colin
- Centre de recherche en cancérologie de Lyon, groupe de radiobiologie, Inserm, UMR 1052, bâtiment Cheney A, rue Laennec, 69008 Lyon, France
| | - Nicolas Foray
- Centre de recherche en cancérologie de Lyon, groupe de radiobiologie, Inserm, UMR 1052, bâtiment Cheney A, rue Laennec, 69008 Lyon, France.
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Martin LM, Marples B, Lynch TH, Hollywood D, Marignol L. Exposure to low dose ionising radiation: Molecular and clinical consequences. Cancer Lett 2014; 349:98-106. [DOI: 10.1016/j.canlet.2013.12.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Heuskin AC, Michiels C, Lucas S. Low dose hypersensitivity following in vitro cell irradiation with charged particles: Is the mechanism the same as with X-ray radiation? Int J Radiat Biol 2013; 90:81-9. [PMID: 23957604 DOI: 10.3109/09553002.2013.835503] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE Among the low dose effects that have been discovered during the past decade, the low dose hypersensitivity (HRS) is of prime importance. This phenomenon, compared to irradiation at higher doses used in conventional radiotherapy, enhances cell killing per unit dose at low doses and is followed by an induced radioresistance (IRR) effect. On survival fraction curves, a deviation from the linear quadratic model can be observed. HRS has mainly been studied after irradiation with sparsely ionizing radiation. Little work has been done to check its actual existence after irradiation with medium and high linear energy transfer (LET) particles. This article reviews recent studies involving HRS following irradiation of rodent and human cells with protons, alpha particles and carbon ions and assesses the applicability of a photon HRS model to charged particles. CONCLUSION We propose that the HRS threshold dose and the radiosensitive parameter αs may be LET and deoxyribonucleic acid (DNA) damage-clustering dependent. Combining the use of high-LET particles at low doses and chemotherapy strategies increasing the proportion of HRS-sensitive cells could become a good candidate treatment for radioresistant cancers.
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Affiliation(s)
- Anne-Catherine Heuskin
- Namur Research Institute for Life Sciences (NARILIS), Research Center for the Physics of Matter and Radiation (PMR), University of Namur
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Schoenherr D, Krueger SA, Martin L, Marignol L, Wilson GD, Marples B. Determining if low dose hyper-radiosensitivity (HRS) can be exploited to provide a therapeutic advantage: a cell line study in four glioblastoma multiforme (GBM) cell lines. Int J Radiat Biol 2013; 89:1009-16. [PMID: 23859266 DOI: 10.3109/09553002.2013.825061] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To determine if ultra-fractionation using repeated pulses of radiation (10 × 0.2 Gray [Gy]) would be more cytotoxic than continuously-delivered radiation to the same total dose (2 Gy) in four glioma cell lines. MATERIALS AND METHODS Human T98G, U373, U87MG and U138MG cells were conventionally X-irradiated with 0.1-8 Gy and clonogenic survival assessed. Next, cells were treated with either a single dose of 2 Gy or 10 pulses of 0.2 Gy using a 3-min inter-pulse interval and DNA (Deoxyribonucleic acid) repair (pHistone H2A.X), G2-phase cell cycle checkpoint arrest (pHistone H3) and apoptosis (caspase-3) compared between the two regimens. A dose of 0.2 Gy was selected as this reflects the hyper- radiosensitivity (HRS)/increased radioresistance (IRR) transition point of the low-dose cell survival curve. RESULTS T98G, U87MG and U138MG exhibited distinct HRS responses and survival curves were well-described by the Induced Repair model. Despite the prolonged delivery time, ultra-fractionation (10 × 0.2 Gy) was equally effective as a single continuously-delivered 2 Gy dose. However, ultra-fractionation was more effective when given for five consecutive days to a total dose of 10 Gy. The increased effectiveness of ultra-fractionation could not be attributed directly to differences in DNA damage, repair processes or radiation-induced apoptosis. CONCLUSIONS Ultra-fractionation (10 × 0.2 Gy) is an effective modality for killing glioma cell lines compared with standard 2 Gy dosing when multiple days of treatment are given.
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Affiliation(s)
- Diane Schoenherr
- Department of Radiation Oncology, Beaumont Health System , Royal Oak, Michigan , USA
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Martin LM, Marples B, Davies AM, Atzberger A, Edwards C, Lynch TH, Hollywood D, Marignol L. DNA mismatch repair protein MSH2 dictates cellular survival in response to low dose radiation in endometrial carcinoma cells. Cancer Lett 2013; 335:19-25. [DOI: 10.1016/j.canlet.2013.01.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 01/24/2013] [Accepted: 01/24/2013] [Indexed: 11/24/2022]
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Thomas C, Martin J, Devic C, Bräuer-Krisch E, Diserbo M, Thariat J, Foray N. Impact of dose-rate on the low-dose hyper-radiosensitivity and induced radioresistance (HRS/IRR) response. Int J Radiat Biol 2013; 89:813-22. [PMID: 23631649 DOI: 10.3109/09553002.2013.800248] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
PURPOSE To ask whether dose-rate influences low-dose hyper- radiosensitivity and induced radioresistance (HRS/IRR) response in rat colon progressive (PRO) and regressive (REG) cells. METHODS Clonogenic survival was applied to tumorigenic PRO and non-tumorigenic REG cells irradiated with (60)Co γ-rays at 0.0025-500 mGy.min(-1). Both clonogenic survival and non-homologous end-joining (NHEJ) pathway involved in DNA double-strand breaks (DSB) repair assays were applied to PRO cells irradiated at 25 mGy.min(-1) with 75 kV X-rays only. RESULTS Irrespective of dose-rates, marked HRS/IRR responses were observed in PRO but not in REG cells. For PRO cells, the doses at which HRS and IRR responses are maximal were dependent on dose-rate; conversely exposure times during which HRS and IRR responses are maximal (t(HRSmax) and t(IRRmax)) were independent of dose-rate. The t(HRSmax) and t(IRRmax) values were 23 ± 5 s and 66 ± 7 s (mean ± standard error of the mean [SEM], n = 7), in agreement with literature data. Repair data show that t(HRSmax) may correspond to exposure time during which NHEJ is deficient while t(IRRmax) may correspond to exposure time during which NHEJ is complete. CONCLUSION HRS response may be maximal if exposure times are shorter than t(HRSmax) irrespective of dose, dose-rate and cellular model. Potential application of HRS response in radiotherapy is discussed.
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Affiliation(s)
- Charles Thomas
- Institut National de la Santé et de la Recherche Médicale (INSERM) U 1052, groupe de radiobiologie , Lyon
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Exposure to low dose ionising radiation: molecular and clinical consequences. Cancer Lett 2013; 338:209-18. [PMID: 23693079 DOI: 10.1016/j.canlet.2013.05.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 05/10/2013] [Accepted: 05/13/2013] [Indexed: 12/19/2022]
Abstract
This review article provides a comprehensive overview of the experimental data detailing the incidence, mechanism and significance of low dose hyper-radiosensitivity (HRS). Important discoveries gained from past and present studies are mapped and highlighted to illustrate the pathway to our current understanding of HRS and the impact of HRS on the cellular response to radiation in mammalian cells. Particular attention is paid to the balance of evidence suggesting a role for DNA repair processes in the response, evidence suggesting a role for the cell cycle checkpoint processes, and evidence investigating the clinical implications/relevance of the effect.
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Colin C, Devic C, Noël A, Rabilloud M, Zabot MT, Pinet-Isaac S, Giraud S, Riche B, Valette PJ, Rodriguez-Lafrasse C, Foray N. DNA double-strand breaks induced by mammographic screening procedures in human mammary epithelial cells. Int J Radiat Biol 2011; 87:1103-12. [PMID: 21797809 DOI: 10.3109/09553002.2011.608410] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To assess in vitro mammographic radiation-induced DNA damage in mammary epithelial cells from 30 patients with low (LR) or high (HR) family risk of breast cancer. MATERIALS AND METHODS Spontaneous and radiation-induced DNA double-strand breaks (DSB) were quantified by using immunofluorescence of the phosphorylated H2AX histone (γH2AX) in different conditions of mammography irradiation (2, 4, 2 + 2 mGy). RESULTS HR patients showed significantly more spontaneous γH2AX foci than LR patients (p = 0.014). A significant dose-effect was observed, with an exacerbation in HR patients (p = 0.01). The dose repetition (2 + 2 mGy) provided more induced and more unrepaired DSB than 2 mGy and 4 mGy, and was exacerbated in HR (p = 0.006). CONCLUSIONS This study highlights the existence of DSB induced by mammography and revealed by γH2AX assay with two major radiobiological effects occurring: A low-dose effect, and a LOw and Repeated Dose (LORD) effect. All these effects were exacerbated in HR patients. These findings may lead us to re-evaluate the number of views performed in screening using a single view (oblique) in women whose mammographic benefit has not properly been proved such as HR patients.
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Affiliation(s)
- Catherine Colin
- Hospices Civils de Lyon, Service de Radiologie, Centre Hospitalier Lyon Sud, Pierre-Bénite, France.
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Gastaldo J, Bencokova Z, Massart C, Joubert A, Balosso J, Charvet AM, Foray N. Specific molecular and cellular events induced by irradiated X-ray photoactivatable drugs raise the problem of co-toxicities: particular consequences for anti-cancer synchrotron therapy. JOURNAL OF SYNCHROTRON RADIATION 2011; 18:456-463. [PMID: 21525655 DOI: 10.1107/s0909049511006017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2010] [Accepted: 02/17/2011] [Indexed: 05/30/2023]
Abstract
Synchrotrons are capable of producing intense low-energy X-rays that enable the photoactivation of high-Z elements. Photoactivation therapy (PAT) consists of loading tumors with photoactivatable drugs and thereafter irradiating them at an energy, generally close to the K-edge of the element, that enhances the photoelectric effect. To date, three major photoactivatable elements are used in PAT: platinum (cisplatin and carboplatin), iodine (iodinated contrast agents and iododeoxyuridine) and gadolinium (motexafin gadolinium). However, the molecular and cellular events specific to PAT and the radiobiological properties of these photoactivatable drugs are still misknown. Here, it is examined how standard and synchrotron X-rays combined with photoactivatable drugs impact on the cellular response of human endothelial cells. These findings suggest that the radiolysis products of the photoactivatable drugs may participate in the synergetic effects of PAT by increasing the severity of radiation-induced DNA double-strand breaks. Interestingly, subpopulation of highly damaged cells was found to be a cellular pattern specific to PAT. The data show that the efficiency of emerging anti-cancer modalities involving synchrotron photoactivation strongly depends on the choice of photoactivatable drugs, and important series of experiments are required to secure their clinical transfer before applying to humans.
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Affiliation(s)
- Jérôme Gastaldo
- INSERM, U836, Institut des Neurosciences, 38043 Grenoble, France
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Granzotto A, Joubert A, Viau M, Devic C, Maalouf M, Thomas C, Vogin G, Malek K, Colin C, Balosso J, Foray N. Réponse individuelle aux radiations ionisantes : quel(s) test(s) prédictif(s) choisir ? C R Biol 2011; 334:140-57. [DOI: 10.1016/j.crvi.2010.12.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 12/28/2010] [Accepted: 12/29/2010] [Indexed: 12/27/2022]
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Maalouf M, Durante M, Foray N. Biological effects of space radiation on human cells: history, advances and outcomes. JOURNAL OF RADIATION RESEARCH 2011; 52:126-146. [PMID: 21436608 DOI: 10.1269/jrr.10128] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Exposure to radiation is one of the main concerns for space exploration by humans. By focusing deliberately on the works performed on human cells, we endeavored to review, decade by decade, the technological developments and conceptual advances of space radiation biology. Despite considerable efforts, the cancer and the toxicity risks remain to be quantified: 1) the nature and the frequency of secondary heavy ions need to be better characterized in order to estimate their contribution to the dose and to the final biological response; 2) the diversity of radiation history of each astronaut and the impact of individual susceptibility make very difficult any epidemiological analysis for estimating hazards specifically due to space radiation exposure. 3) Cytogenetic data undoubtedly revealed that space radiation exposure produce significant damage in cells. However, our knowledge of the basic mechanisms specific to low-dose, to repeated doses and to adaptive response is still poor. The application of new radiobiological techniques, like immunofluorescence, and the use of human tissue models different from blood, like skin fibroblasts, may help in clarifying all the above items.
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Affiliation(s)
- Mira Maalouf
- Institut National de la Santé et de la Recherche Médicale, U836, Groupe de Radiobiologie, Paris, France
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Martin LM, Marples B, Coffey M, Lawler M, Lynch TH, Hollywood D, Marignol L. DNA mismatch repair and the DNA damage response to ionizing radiation: Making sense of apparently conflicting data. Cancer Treat Rev 2010; 36:518-27. [PMID: 20413225 DOI: 10.1016/j.ctrv.2010.03.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2010] [Revised: 03/12/2010] [Accepted: 03/21/2010] [Indexed: 10/19/2022]
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