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Shishkina EA, Sharagin PA, Tolstykh EI, Smith MA, Napier BA, Degteva MO. Uncertainty of stochastic parametric approach to bone marrow dosimetry of 89,90Sr. Heliyon 2024; 10:e26275. [PMID: 38420372 PMCID: PMC10900932 DOI: 10.1016/j.heliyon.2024.e26275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/08/2024] [Accepted: 02/09/2024] [Indexed: 03/02/2024] Open
Abstract
The objective of this study is to evaluate the uncertainties of the dosimetric modeling of active marrow (AM) exposure from bone-seeking 89,90Sr. The stochastic parametric skeletal dosimetry (SPSD) model was specifically developed to study the long-term effects resulting from chronic 89,90Sr exposure in populations of the radioactively contaminated territories of the Southern Urals region of the Russian Federation. The method permits the evaluation of the dose factors (DF(AM ← TBV) and DF(AM ← CBV)), which convert the radionuclide activity concentration in trabecular (TBV) and cortical (CBV) bone volumes into dose rate in the AM, and their uncertainties. The sources of uncertainty can be subdivided into inherent uncertainties related to the individual variability of the simulated objects and introduced uncertainties related to model simplifications. Inherent uncertainty components are the individual variability of bone chemical composition, bone density, bone micro- and macro-architecture as well as AM distribution within the skeleton. The introduced uncertainties may result from the stylization of bone segment geometry, assumption of uniform cortical thickness, restriction of bone geometry and the selection of the applied voxel resolution. The inherent uncertainty depends on a number of factors of influence. Foremost, it is the result of variability of AM distribution within the skeleton. Another important factor is the variability of bone micro- and macro-architecture. The inherent uncertainty of skeletal-average dose factors was found to be about 40-50%. The introduced uncertainty associated with the SPSD model approach does not exceed 16% and mainly depends on the error of bone-shape stylization. The overall inherent and introduced uncertainties of DF(AM ← TBV) and DF(AM ← CBV) are below 55% and 63%, respectively. The results obtained will be incorporated into the stochastic version of the Techa River Dosimetry System (TRDS-2016MC) that provides multiple realizations of the annual doses for each cohort member to obtain both a central estimate of the individual dose and information on the dose uncertainty.
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Affiliation(s)
- Elena A. Shishkina
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
- Chelyabinsk State University, Chelyabinsk, Russia
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Little MP, Wakeford R, Zablotska LB, Borrego D, Griffin KT, Allodji RS, de Vathaire F, Lee C, Brenner AV, Miller JS, Campbell D, Pearce MS, Sadetzki S, Doody MM, Holmberg E, Lundell M, French B, Adams MJ, Berrington de González A, Linet MS. Radiation exposure and leukaemia risk among cohorts of persons exposed to low and moderate doses of external ionising radiation in childhood. Br J Cancer 2023; 129:1152-1165. [PMID: 37596407 PMCID: PMC10539334 DOI: 10.1038/s41416-023-02387-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 07/12/2023] [Accepted: 07/27/2023] [Indexed: 08/20/2023] Open
Abstract
BACKGROUND Many high-dose groups demonstrate increased leukaemia risks, with risk greatest following childhood exposure; risks at low/moderate doses are less clear. METHODS We conducted a pooled analysis of the major radiation-associated leukaemias (acute myeloid leukaemia (AML) with/without the inclusion of myelodysplastic syndrome (MDS), chronic myeloid leukaemia (CML), acute lymphoblastic leukaemia (ALL)) in ten childhood-exposed groups, including Japanese atomic bomb survivors, four therapeutically irradiated and five diagnostically exposed cohorts, a mixture of incidence and mortality data. Relative/absolute risk Poisson regression models were fitted. RESULTS Of 365 cases/deaths of leukaemias excluding chronic lymphocytic leukaemia, there were 272 AML/CML/ALL among 310,905 persons (7,641,362 person-years), with mean active bone marrow (ABM) dose of 0.11 Gy (range 0-5.95). We estimated significant (P < 0.005) linear excess relative risks/Gy (ERR/Gy) for: AML (n = 140) = 1.48 (95% CI 0.59-2.85), CML (n = 61) = 1.77 (95% CI 0.38-4.50), and ALL (n = 71) = 6.65 (95% CI 2.79-14.83). There is upward curvature in the dose response for ALL and AML over the full dose range, although at lower doses (<0.5 Gy) curvature for ALL is downwards. DISCUSSION We found increased ERR/Gy for all major types of radiation-associated leukaemia after childhood exposure to ABM doses that were predominantly (for 99%) <1 Gy, and consistent with our prior analysis focusing on <100 mGy.
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Affiliation(s)
- Mark P Little
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA.
| | - Richard Wakeford
- Centre for Occupational and Environmental Health, Faculty of Biology, Medicine and Health, The University of Manchester, Ellen Wilkinson Building, Oxford Road, Manchester, M13 9PL, UK
| | - Lydia B Zablotska
- Department of Epidemiology & Biostatistics, School of Medicine, University of California, San Francisco, 550 16th Street, 2nd floor, San Francisco, CA, 94143, USA
| | - David Borrego
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
| | - Keith T Griffin
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
| | - Rodrigue S Allodji
- Equipe d'Epidémiologie des radiations, Unité 1018 INSERM, Bâtiment B2M, Institut Gustave Roussy, Villejuif, Cedex, 94805, France
| | - Florent de Vathaire
- Equipe d'Epidémiologie des radiations, Unité 1018 INSERM, Bâtiment B2M, Institut Gustave Roussy, Villejuif, Cedex, 94805, France
| | - Choonsik Lee
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
| | - Alina V Brenner
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
| | - Jeremy S Miller
- Information Management Services, Silver Spring, MD, 20904, USA
| | - David Campbell
- Information Management Services, Silver Spring, MD, 20904, USA
| | - Mark S Pearce
- Institute of Health and Society, Newcastle University, Sir James Spence Institute, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
- NIHR Health Protection Research Unit in chemical and radiation threats and hazards, Newcastle University, Newcastle upon Tyne, UK
| | - Siegal Sadetzki
- Israel Ministry of Health, Jerusalem, Israel
- Cancer & Radiation Epidemiology Unit, Gertner Institute for Epidemiology & Health Policy Research, Sheba Medical Center, Tel-Hashomer, Israel & Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv-Yafo, Israel
| | - Michele M Doody
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
| | - Erik Holmberg
- Department of Oncology, Sahlgrenska University Hospital, S-413-45, Göteborg, Sweden
| | - Marie Lundell
- Department of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, S-17176, Stockholm, Sweden
| | - Benjamin French
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Michael Jacob Adams
- University of Rochester School of Medicine and Dentistry, 265 Crittenden Boulevard, CU 420644, Rochester, NY, 14642-0644, USA
| | - Amy Berrington de González
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
- Division of Genetics and Epidemiology, Institute of Cancer Research, London, UK
| | - Martha S Linet
- Radiation Epidemiology Branch, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD, 20892-9778, USA
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Harrison JD, Oatway WB, Brown IK, Hopewell JW. Health risks from radioactive particles on Cumbrian beaches near the Sellafield nuclear site. J Radiol Prot 2023; 43:031504. [PMID: 37339608 DOI: 10.1088/1361-6498/acdfd6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 06/20/2023] [Indexed: 06/22/2023]
Abstract
A monitoring programme, in place since 2006, continues to recover radioactive particles (<2 mm diameter) and larger objects from the beaches of West Cumbria. The potential risks to members of the public using the beaches are mainly related to prolonged skin contact with or the inadvertent ingestion of small particles. Most particles are classified as either 'beta-rich' or 'alpha-rich' and are detected as a result of their caesium-137 or americium-241 content. Beta-rich particles generally also contain strontium-90, with90Sr:137Cs ratios of up to about 1:1, but typically <0.1:1. Alpha-rich particles contain plutonium isotopes, with Pu:241Amαratios usually around 0.5-0.6:1. 'Beta-rich' particles have the greatest potential to cause localised skin damage if held in stationary contact with the skin for prolonged periods. However, it is concluded that only particles of >106Bq of137Cs, with high90Sr:137Cs ratios, would pose a significant risk of causing acute skin ulceration. No particles of this level of activity have been found. Inadvertent ingestion of a particle will result in the absorption to blood of a small proportion of the radionuclide content of the particle. The subsequent retention of radionuclides in body organs and tissues presents a potential risk of the development of cancer. For 'beta-rich' particles with typical activities (mean 2 × 104Bq137Cs, Sr:Cs ratio of 0.1:1), the estimated committed effective doses are about 30µSv for adults and about 40µSv for 1 year old infants, with lower values for 'alpha-rich' particles of typical activities. The corresponding estimates of lifetime cancer incidence following ingestion for both particle types are of the order of 10-6for adults and up to 10-5for infants. These estimates are subject to substantial uncertainties but provide an indication of the low risks to members of the public.
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Affiliation(s)
- John D Harrison
- Oxford Brookes University, Faculty of Health and Life Sciences, Oxford OX3 0BP, United Kingdom
- UK Health Security Agency, Radiation, Chemical and Environmental Hazards Directorate, Chilton, Didcot, Oxon OX11 0RQ, United Kingdom
| | - Wayne B Oatway
- UK Health Security Agency, Radiation, Chemical and Environmental Hazards Directorate, Chilton, Didcot, Oxon OX11 0RQ, United Kingdom
| | - Iain K Brown
- UK Health Security Agency, Radiation, Chemical and Environmental Hazards Directorate, Chilton, Didcot, Oxon OX11 0RQ, United Kingdom
| | - John W Hopewell
- Green Temple College, University of Oxford, Oxford OX2 6HG, United Kingdom
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, United Kingdom
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Lowe D, Roy L, Tabocchini MA, Rühm W, Wakeford R, Woloschak GE, Laurier D. Radiation dose rate effects: what is new and what is needed? Radiat Environ Biophys 2022; 61:507-543. [PMID: 36241855 PMCID: PMC9630203 DOI: 10.1007/s00411-022-00996-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 09/13/2022] [Indexed: 05/04/2023]
Abstract
Despite decades of research to understand the biological effects of ionising radiation, there is still much uncertainty over the role of dose rate. Motivated by a virtual workshop on the "Effects of spatial and temporal variation in dose delivery" organised in November 2020 by the Multidisciplinary Low Dose Initiative (MELODI), here, we review studies to date exploring dose rate effects, highlighting significant findings, recent advances and to provide perspective and recommendations for requirements and direction of future work. A comprehensive range of studies is considered, including molecular, cellular, animal, and human studies, with a focus on low linear-energy-transfer radiation exposure. Limits and advantages of each type of study are discussed, and a focus is made on future research needs.
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Affiliation(s)
- Donna Lowe
- UK Health Security Agency, CRCE Chilton, Didcot, OX11 0RQ, Oxfordshire, UK
| | - Laurence Roy
- Institut de Radioprotection Et de Sûreté Nucléaire, Fontenay-Aux-Roses, France
| | - Maria Antonella Tabocchini
- Istituto Nazionale i Fisica Nucleare, Sezione i Roma, Rome, Italy
- Istituto Superiore Di Sanità, Rome, Italy
| | - Werner Rühm
- Institute of Radiation Medicine, Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Richard Wakeford
- Centre for Occupational and Environmental Health, The University of Manchester, Manchester, M13 9PL, UK
| | - Gayle E Woloschak
- Department of Radiation Oncology, Northwestern University School of Medicine, Chicago, IL, USA.
| | - Dominique Laurier
- Institut de Radioprotection Et de Sûreté Nucléaire, Fontenay-Aux-Roses, France
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Bahmad HF, Gogola S, Elajami MK, Brathwaite C, Castellano-Sánchez AA, Sriganeshan V, Omarzai Y. Hemophagocytic Lymphohistiocytosis in the Setting of Therapy-Induced Acute Myeloid Leukemia: An Autopsy Report. Diseases 2022; 10:54. [PMID: 35997359 DOI: 10.3390/diseases10030054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/09/2022] [Accepted: 08/17/2022] [Indexed: 11/16/2022] Open
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening hyper-inflammatory disorder that occurs due to immunologic dysregulation. HLH can be primary (hereditary) or secondary to infections, autoimmune diseases, immune deficiencies, metabolic diseases, drugs, or malignancies. Lymphoid neoplasms mostly accompany malignancy-associated HLH. We present a case of a 12-year-old boy with a history of precursor B lymphoblastic leukemia (B-ALL), who subsequently developed chemotherapy-induced acute myeloid leukemia (t-AML). The patient was admitted for febrile neutropenia and initial laboratory tests revealed hemophagocytic lymphohistiocytosis (HLH). The hospital course was complicated by multiple infections and septic shock. The patient received several broad-spectrum antimicrobials, dexamethasone, as well as a pericardial drain to drain the hemorrhagic pericardial effusion. Despite intervention, the patient expired, and an autopsy was performed. We provide a synopsis of the main autopsy findings.
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Akleyev AV, Degteva MO, Krestinina LY. Overall results and prospects of the cancer risk assessment in the Urals population affected by chronic low dose-rate exposure. Radiation Medicine and Protection 2022. [DOI: 10.1016/j.radmp.2022.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Gholipour E, Kahroba H, Soltani N, Samadi P, Sarvarian P, Vakili-Samiani S, Hosein Pour Feizi AA, Soltani-Zangbar MS, Baghersalimi A, Darbandi B, Movassaghpour A, Talebi M, Motavalli R, Mehdizadeh A, Kazemi A, Yousefi M. Paediatric pre-B acute lymphoblastic leukaemia-derived exosomes regulate immune function in human T cells. J Cell Mol Med 2022; 26:4566-4576. [PMID: 35822529 PMCID: PMC9357647 DOI: 10.1111/jcmm.17482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 06/24/2022] [Accepted: 06/30/2022] [Indexed: 11/30/2022] Open
Abstract
Exosomes derived from solid tumour cells are involved in immune suppression, angiogenesis and metastasis; however, the role of leukaemia‐derived exosomes has less been investigated. Hence, changes in immune response‐related genes and human T cells apoptosis co‐incubated with exosomes isolated from patients' pre‐B cell acute lymphoblastic leukaemia were evaluated in this in vitro study. Vein blood sample was obtained from each newly diagnosed acute lymphoblastic leukaemia (ALL) patient prior any therapy. ALL serum exosomes were isolated by ultrafiltration and characterized using Western blotting and transmission electron microscopy. Exosomes were then co‐incubated with T lymphocytes and the gene expressions, as well as functions of human T cells were quantified by qRT‐PCR. Apoptosis and caspase‐3 and caspase‐9 protein expression were also evaluated by flowcytometry and Western blotting analysis, respectively. Exosomes isolated from ALL patients affected T lymphocytes and elevated the apoptosis. Moreover, these exosomes altered the T cells profile into regulatory type by increasing the expression of FOXP3 and Tregs‐related cytokines, including TGF‐B and IL‐10. The expression level of Th17‐related transcription factors (RoRγt) and interleukins (IL‐17 and IL‐23) decreased after this treatment. According to our findings, exosomes derived from ALL patients' sera carry immunosuppressive molecules, indicating the possible effect of exosomes as liquid biomarkers for cancer staging.
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Affiliation(s)
- Elham Gholipour
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Houman Kahroba
- Departments of Toxicogenomics, GROW School for Oncology and Developmental Biology, Maastricht University, Maastricht, Netherlands.,Center for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Nasim Soltani
- Master of Science Neonatal Intensive Care Nursing, Faculity of Nursing and Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parisa Samadi
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parisa Sarvarian
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sajjad Vakili-Samiani
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | | | - Adel Baghersalimi
- Pediatric Disease Research Center, Guilan University of Medical Sciences, Rasht, Iran
| | - Bahram Darbandi
- Pediatric Disease Research Center, Guilan University of Medical Sciences, Rasht, Iran
| | - Aliakbar Movassaghpour
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehdi Talebi
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Roza Motavalli
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Mehdizadeh
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abdolhassan Kazemi
- Medical Philosophy and History Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehdi Yousefi
- Research Center for Integrative Medicine in Aging, Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
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Li C, Alves Dos Reis A, Ansari A, Bertelli L, Carr Z, Dainiak N, Degteva M, Efimov A, Kalinich J, Kryuchkov V, Kukhta B, Kurihara O, Antonia Lopez M, Port M, Riddell T, Rump A, Sun Q, Tuo F, Youngman M, Zhang J. Public health response and medical management of internal contamination in past radiological or nuclear incidents: A narrative review. Environ Int 2022; 163:107222. [PMID: 35378442 PMCID: PMC9749825 DOI: 10.1016/j.envint.2022.107222] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 03/23/2022] [Accepted: 03/28/2022] [Indexed: 05/03/2023]
Abstract
Following a radiological or nuclear emergency, workers, responders and the public may be internally contaminated with radionuclides. Screening, monitoring and assessing any internal contamination and providing necessary medical treatment, especially when a large number of individuals are involved, is challenging. Experience gained and lessons learned from the management of previous incidents would help to identify gaps in knowledge and capabilities on preparedness for and response to radiation emergencies. In this paper, eight large-scale and five workplace radiological and nuclear incidents are reviewed cross 14 technical areas, under the broader topics of emergency preparedness, emergency response and recovery processes. The review findings suggest that 1) new strategies, algorithms and technologies are explored for rapid screening of large populations; 2) exposure assessment and dose estimation in emergency response and dose reconstruction in recovery process are supported by complementary sources of information, including 'citizen science'; 3) surge capacity for monitoring and dose assessment is coordinated through national and international laboratory networks; 4) evidence-based guidelines for medical management and follow-up of internal contamination are urgently needed; 5) mechanisms for international and regional access to medical countermeasures are investigated and implemented; 6) long-term health and medical follow up programs are designed and justified; and 7) capabilities and capacity developed for emergency response are sustained through adequate resource allocation, routine non-emergency use of technical skills in regular exercises, training, and continuous improvement.
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Affiliation(s)
| | | | - Armin Ansari
- Centers for Disease Control and Prevention, Atlanta, USA
| | | | - Zhanat Carr
- World Health Organization, Geneva, Switzerland
| | | | - Marina Degteva
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - Alexander Efimov
- State Unitary Enterprise Southern Urals Biophysics Institute of Federal Medical Biological Agency, Ozyorsk, Russia
| | - John Kalinich
- Armed Forces Radiobiology Research Institute, Uniformed Services University, Bethesda, USA
| | - Victor Kryuchkov
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow, Russia
| | - Boris Kukhta
- State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow, Russia
| | - Osamu Kurihara
- National Institutes of Quantum and Radiological Science and Technology, Chiba, Japan
| | - Maria Antonia Lopez
- Centro de Investigaciones Energéticas, Medioambientales y Tecnolόgicas, Madrid, Spain
| | - Matthias Port
- Bundeswehr Institute of Radiobiology, Munich, Germany
| | | | - Alexis Rump
- Bundeswehr Institute of Radiobiology, Munich, Germany
| | - Quanfu Sun
- National Institute for Radiological Protection, Beijing, China
| | - Fei Tuo
- National Institute for Radiological Protection, Beijing, China
| | | | - Jianfeng Zhang
- National Institute for Radiological Protection, Beijing, China
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Lejman M, Chałupnik A, Chilimoniuk Z, Dobosz M. Genetic Biomarkers and Their Clinical Implications in B-Cell Acute Lymphoblastic Leukemia in Children. Int J Mol Sci 2022; 23:ijms23052755. [PMID: 35269896 PMCID: PMC8911213 DOI: 10.3390/ijms23052755] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/27/2022] [Accepted: 02/28/2022] [Indexed: 02/04/2023] Open
Abstract
Acute lymphoblastic leukemia (ALL) is a heterogeneous group of hematologic malignancies characterized by abnormal proliferation of immature lymphoid cells. It is the most commonly diagnosed childhood cancer with an almost 80% cure rate. Despite favorable survival rates in the pediatric population, a significant number of patients develop resistance to therapy, resulting in poor prognosis. ALL is a heterogeneous disease at the genetic level, but the intensive development of sequencing in the last decade has made it possible to broaden the study of genomic changes. New technologies allow us to detect molecular changes such as point mutations or to characterize epigenetic or proteomic profiles. This process made it possible to identify new subtypes of this disease characterized by constellations of genetic alterations, including chromosome changes, sequence mutations, and DNA copy number alterations. These genetic abnormalities are used as diagnostic, prognostic and predictive biomarkers that play an important role in earlier disease detection, more accurate risk stratification, and treatment. Identification of new ALL biomarkers, and thus a greater understanding of their molecular basis, will lead to better monitoring of the course of the disease. In this article, we provide an overview of the latest information on genomic alterations found in childhood ALL and discuss their impact on patients' clinical outcomes.
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Affiliation(s)
- Monika Lejman
- Laboratory of Genetic Diagnostics, Medical University of Lublin, 20-093 Lublin, Poland
- Correspondence:
| | - Aleksandra Chałupnik
- Student Scientific Society, Laboratory of Genetic Diagnostics, Medical University of Lublin, 20-093 Lublin, Poland; (A.C.); (Z.C.); (M.D.)
| | - Zuzanna Chilimoniuk
- Student Scientific Society, Laboratory of Genetic Diagnostics, Medical University of Lublin, 20-093 Lublin, Poland; (A.C.); (Z.C.); (M.D.)
| | - Maciej Dobosz
- Student Scientific Society, Laboratory of Genetic Diagnostics, Medical University of Lublin, 20-093 Lublin, Poland; (A.C.); (Z.C.); (M.D.)
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Tanooka H. Radiation cancer risk at different dose rates: new dose-rate effectiveness factors derived from revised A-bomb radiation dosimetry data and non-tumor doses. J Radiat Res 2022; 63:1-7. [PMID: 34927198 PMCID: PMC8776691 DOI: 10.1093/jrr/rrab109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/14/2021] [Indexed: 06/14/2023]
Abstract
The dose rate of atomic bomb (A-bomb) radiation to the survivors has still remained unclear, although the dose-response data of A-bomb cancers has been taken as a standard in estimating the cancer risk of radiation and the dose and dose-rate effectiveness factor (DDREF). Since the applicability of the currently used DDREF of 2 derived from A-bomb data is limited in a narrow dose-rate range, 0.25-75 Gy/min as estimated from analysis of DS86 dosimetry data in the present study, a non-tumor dose (Dnt) was applied in an attempt to gain a more universal dose-rate effectiveness factor (DREF), where Dnt is an empirical parameter defined as the highest dose at which no statistically significant tumor increase is observed above the control level and its magnitude depends on the dose rate. The new DREF values were expressed as a function of the dose rate at four exposure categories, i.e. partial body low LET, whole body low linear energy transfer (LET), partial body high LET and whole body high LET and provided a value of 14 for environmental level radiation at a dose rate of 10-9 Gy/min for whole body low LET.
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Affiliation(s)
- Hiroshi Tanooka
- Corresponding author. National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan. Tel. +81-3-3542-2511, Ext. 3224; Fax. +81-3-3542-0623; E-mail address:
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Gu Y, Wang J, Wang Y, Xu C, Liu Y, Du L, Wang Q, Ji K, He N, Zhang M, Song H, Sun X, Wang J, Kitahara CM, de Gonzalez AB, Niu K, Liu Q. Low-dose ionizing radiation exposure and risk of leukemia: results from 1950-1995 Chinese medical X-ray workers cohort study and meta-analysis. Journal of the National Cancer Center 2022. [DOI: 10.1016/j.jncc.2022.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Degteva MO, Tolstykh EI, Shishkina EA, Sharagin PA, Zalyapin VI, Volchkova AY, Smith MA, Napier BA. Stochastic parametric skeletal dosimetry model for humans: General approach and application to active marrow exposure from bone-seeking beta-particle emitters. PLoS One 2021; 16:e0257605. [PMID: 34648511 PMCID: PMC8516275 DOI: 10.1371/journal.pone.0257605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 09/05/2021] [Indexed: 11/25/2022] Open
Abstract
The objective of this study is to develop a skeleton model for assessing active marrow dose from bone-seeking beta-emitting radionuclides. This article explains the modeling methodology which accounts for individual variability of the macro- and microstructure of bone tissue. Bone sites with active hematopoiesis are assessed by dividing them into small segments described by simple geometric shapes. Spongiosa, which fills the segments, is modeled as an isotropic three-dimensional grid (framework) of rod-like trabeculae that “run through” the bone marrow. Randomized multiple framework deformations are simulated by changing the positions of the grid nodes and the thickness of the rods. Model grid parameters are selected in accordance with the parameters of spongiosa microstructures taken from the published papers. Stochastic modeling of radiation transport in heterogeneous media simulating the distribution of bone tissue and marrow in each of the segments is performed by Monte Carlo methods. Model output for the human femur at different ages is provided as an example. The uncertainty of dosimetric characteristics associated with individual variability of bone structure was evaluated. An advantage of this methodology for the calculation of doses absorbed in the marrow from bone-seeking radionuclides is that it does not require additional studies of autopsy material. The biokinetic model results will be used in the future to calculate individual doses to members of a cohort exposed to 89,90Sr from liquid radioactive waste discharged to the Techa River by the Mayak Production Association in 1949–1956. Further study of these unique cohorts provides an opportunity to gain more in-depth knowledge about the effects of chronic radiation on the hematopoietic system. In addition, the proposed model can be used to assess the doses to active marrow under any other scenarios of 90Sr and 89Sr intake to humans.
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Affiliation(s)
| | | | - Elena A. Shishkina
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
- Chelyabinsk State University, Chelyabinsk, Russia
| | | | | | | | - Michael A. Smith
- Pacific Northwest National Laboratory, Richland, Washington, United States of America
| | - Bruce A. Napier
- Pacific Northwest National Laboratory, Richland, Washington, United States of America
- * E-mail:
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Little MP, Wakeford R, Zablotska LB, Borrego D, Griffin KT, Allodji RS, de Vathaire F, Lee C, Brenner AV, Miller JS, Campbell D, Sadetzki S, Doody MM, Holmberg E, Lundell M, Adams MJ, French B, Linet MS, Berrington de Gonzalez A. Lymphoma and multiple myeloma in cohorts of persons exposed to ionising radiation at a young age. Leukemia 2021; 35:2906-2916. [PMID: 34050261 PMCID: PMC8484030 DOI: 10.1038/s41375-021-01284-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/19/2021] [Accepted: 05/04/2021] [Indexed: 02/06/2023]
Abstract
There is limited evidence that non-leukaemic lymphoid malignancies are radiogenic. As radiation-related cancer risks are generally higher after childhood exposure, we analysed pooled lymphoid neoplasm data in nine cohorts first exposed to external radiation aged <21 years using active bone marrow (ABM) and, where available, lymphoid system doses, and harmonised outcome classification. Relative and absolute risk models were fitted. Years of entry spanned 1916-1981. At the end of follow-up (mean 42.1 years) there were 593 lymphoma (422 non-Hodgkin (NHL), 107 Hodgkin (HL), 64 uncertain subtype), 66 chronic lymphocytic leukaemia (CLL) and 122 multiple myeloma (MM) deaths and incident cases among 143,136 persons, with mean ABM dose 0.14 Gy (range 0-5.95 Gy) and mean age at first exposure 6.93 years. Excess relative risk (ERR) was not significantly increased for lymphoma (ERR/Gy = -0.001; 95% CI: -0.255, 0.279), HL (ERR/Gy = -0.113; 95% CI: -0.669, 0.709), NHL + CLL (ERR/Gy = 0.099; 95% CI: -0.149, 0.433), NHL (ERR/Gy = 0.068; 95% CI: -0.253, 0.421), CLL (ERR/Gy = 0.320; 95% CI: -0.678, 1.712), or MM (ERR/Gy = 0.149; 95% CI: -0.513, 1.063) (all p-trend > 0.4). In six cohorts with estimates of lymphatic tissue dose, borderline significant increased risks (p-trend = 0.02-0.07) were observed for NHL + CLL, NHL, and CLL. Further pooled epidemiological studies are needed with longer follow-up, central outcome review by expert hematopathologists, and assessment of radiation doses to lymphoid tissues.
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Affiliation(s)
- Mark P Little
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, MD, USA.
| | - Richard Wakeford
- Centre for Occupational and Environmental Health, Institute of Population Health, The University of Manchester, Manchester, UK
| | - Lydia B Zablotska
- Department of Epidemiology & Biostatistics, School of Medicine, University of California, San Francisco, CA, USA
| | - David Borrego
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, MD, USA
| | - Keith T Griffin
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, MD, USA
| | - Rodrigue S Allodji
- Equipe d'Epidémiologie des radiations, Unité 1018 INSERM, Bâtiment B2M, Institut Gustave Roussy, Villejuif Cedex, France
| | - Florent de Vathaire
- Equipe d'Epidémiologie des radiations, Unité 1018 INSERM, Bâtiment B2M, Institut Gustave Roussy, Villejuif Cedex, France
| | - Choonsik Lee
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, MD, USA
| | - Alina V Brenner
- Radiation Effects Research Foundation, Hiroshima City, Japan
| | | | | | - Siegal Sadetzki
- Israel Ministry of Health, Jerusalem, Israel
- Cancer & Radiation Epidemiology Unit, Gertner Institute for Epidemiology & Health Policy Research, Sheba Medical Center, Tel-Hashomer, Israel & Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv-Yafo, Israel
| | - Michele M Doody
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, MD, USA
| | - Erik Holmberg
- Department of Oncology, Sahlgrenska University Hospital, Göteborg, Sweden
| | - Marie Lundell
- Department of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Michael Jacob Adams
- University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Benjamin French
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Martha S Linet
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, MD, USA
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Akleyev AV. Specific features of medical care provision to the population of the Techa riverside settlements. J Radiol Prot 2021; 41:S342-S354. [PMID: 34134096 DOI: 10.1088/1361-6498/ac0c02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 06/16/2021] [Indexed: 06/12/2023]
Abstract
This paper is devoted to the issue of medical care provision to the residents of the Techa riverside settlements affected by long-term radiation exposure. The river was contaminated due to operational and accidental releases of liquid radioactive waste (LRW) by the 'Mayak' Production Association from 1949 to 1956. Contamination of the river and its floodplain with radionuclides, including long-lived90Sr and137Cs, caused long-term external and internal exposure of the population, predominantly of the bone marrow. Protective countermeasures (resettlement of residents, introduction of restrictions on the use of the river and floodplain, construction of wells, etc) did not manage to prevent relatively high exposure doses to the population. The mean dose value of bone marrow exposure in residents of the riverside settlements was 0.35 Gy, whereas the maximum values were up to 7.92 Gy. The first medical examinations by mobile teams of the Moscow Institute of Biophysics were started approximately two years after the onset of LRW releases. Since 1955, exposed residents have been followed up and are undergoing medical treatment at the Clinic of the Urals Research Center for Radiation Medicine of the Federal Medical and Biological Agency (URCRM). This center was established in response to the necessity to study the biological effects of the combined external γ-exposure and exposure due to90Sr in order to arrange medical care for the exposed population. The URCRM Clinic focuses on the provision of hematological care since cases of chronic radiation syndrome were registered among the exposed population in the early period, and increased leukemia incidence has been observed in the long-term period.
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Affiliation(s)
- A V Akleyev
- Urals Research Center for Radiation Medicine of the Federal Medical and Biological Agency, Chelyabinsk, Russia
- Chelyabinsk State University, Chelyabinsk, Russia
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Abstract
Objectives: High dose-rate ionizing radiation (IR) causes severe DSB damage, as well as reactive oxygen species (ROS) accumulation and oxidative stress. However, it is unknown what biological processes are affected by low dose-rate IR; therefore, the molecular relationships between mitochondria changes and oxidative stress in human normal cells was investigated after low dose-rate IR.Methods: We compared several cellular response between high and low dose-rate irradiation using cell survival assay, ROS/RNS assay, immunofluorescence and western blot analysis.Results: Reduced DSB damage and increased levels of ROS, with subsequent oxidative stress responses, were observed in normal cells after low dose-rate IR. Low dose-rate IR caused several mitochondrial changes, including morphology mass, and mitochondrial membrane potential, suggesting that mitochondrial damage was caused. Although damaged mitochondria were removed by mitophagy to stop ROS leakage, the mitophagy-regulatory factor, PINK1, was reduced following low dose-rate IR. Although mitochondrial dynamics (fission/fusion events) are important for the proper mitophagy process, some mitochondrial fusion factors decreased following low dose-rate IR.Discussion: The dysfunction of mitophagy pathway under low dose-rate IR increased ROS and the subsequent activation of the oxidative stress response.
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Affiliation(s)
- Qingmei Meng
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Sciences, Kyoto University, Yoshidanihonmatsucho, Sakyo-ku, Kyoto, Japan
| | - Elena Karamfilova Zaharieva
- Department of Experimental Oncology, Research Institute for Radiation Biology and Medicine (RIRBM), Hiroshima University, Hiroshima, Japan
| | - Megumi Sasatani
- Department of Experimental Oncology, Research Institute for Radiation Biology and Medicine (RIRBM), Hiroshima University, Hiroshima, Japan
| | - Junya Kobayashi
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Sciences, Kyoto University, Yoshidanihonmatsucho, Sakyo-ku, Kyoto, Japan.,Department of Radiological Sciences, School of Health Sciences at Narita, International University of Health and Welfare, Narita, Japan
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Tolstykh EI, Vozilova AV, Degteva MO, Akleyev AV. Concept of T-Cell Genus as a Basis for Analysis of the Results of Cytogenetic Studies after Local Bone Marrow Exposure. BIOL BULL+ 2021. [DOI: 10.1134/s1062359020110151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ulanowski A, Hiller M, Woda C. Absorbed doses in bricks and TL-dosimeters due to anthropogenic and natural environmental radiation sources. RADIAT MEAS 2021. [DOI: 10.1016/j.radmeas.2020.106458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
The ability of ionising radiation to induce lymphoma is unclear. Here, we present a narrative review of epidemiological evidence of the risk of lymphoma, including chronic lymphocytic leukaemia (CLL) and multiple myeloma (MM), among various exposed populations including atomic bombing survivors, industrial and medical radiation workers, and individuals exposed for medical purposes. Overall, there is a suggestion of a positive dose-dependent association between radiation exposure and lymphoma. The magnitude of this association is highly imprecise, however, with wide confidence intervals frequently including zero risk. External comparisons tend to show similar incidence and mortality rates to the general population. Currently, there is insufficient information on the impact of age at exposure, high versus low linear energy transfer radiation, external versus internal or acute versus chronic exposures. Associations are stronger for males than females, and stronger for non-Hodgkin lymphoma and MM than for Hodgkin lymphoma, while the risk of radiation-induced CLL may be non-existent. This broad grouping of diverse diseases could potentially obscure stronger associations for certain subtypes, each with a different cell of origin. Additionally, the classification of malignancies as leukaemia or lymphoma may result in similar diseases being analysed separately, while distinct diseases are analysed in the same category. Uncertainty in cell of origin means the appropriate organ for dose response analysis is unclear. Further uncertainties arise from potential confounding or bias due to infectious causes and immunosuppression. The potential interaction between radiation and other risk factors is unknown. Combined, these uncertainties make lymphoma perhaps the most challenging malignancy to study in radiation epidemiology.
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Affiliation(s)
- Richard W Harbron
- Population Health Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
- NIHR Health Protection Research Unit in Chemical and Radiation Threats and Hazards, Newcastle University, United Kingdom
- Barcelona Institute for Global Health, (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Elisa Pasqual
- Barcelona Institute for Global Health, (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
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Linet MS, Little MP, Kitahara CM, Cahoon EK, Doody MM, Simon SL, Alexander BH, Preston DL. Occupational radiation and haematopoietic malignancy mortality in the retrospective cohort study of US radiologic technologists, 1983-2012. Occup Environ Med 2020; 77:822-831. [PMID: 32967989 DOI: 10.1136/oemed-2019-106346] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 04/27/2020] [Accepted: 06/07/2020] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To evaluate cumulative occupational radiation dose response and haematopoietic malignancy mortality risks in the US radiologic technologist cohort. METHODS Among 110 297 radiologic technologists (83 655 women, 26 642 men) who completed a baseline questionnaire sometime during 1983-1998, a retrospective cohort study was undertaken to assess cumulative, low-to-moderate occupational radiation dose and haematopoietic malignancy mortality risks during 1983-2012. Cumulative bone marrow dose (mean 8.5 mGy, range 0-430 mGy) was estimated based on 921 134 badge monitoring measurements during 1960-1997, work histories and historical data; 35.4% of estimated doses were based on badge measurements. Poisson regression was used to estimate excess relative risk of haematopoietic cancers per 100 milligray (ERR/100 mGy) bone-marrow absorbed dose, adjusting for attained age, sex and birth year. RESULTS Deaths from baseline questionnaire completion through 2012 included 133 myeloid neoplasms, 381 lymphoid neoplasms and 155 leukaemias excluding chronic lymphocytic leukaemia (CLL). Based on a linear dose-response, no significant ERR/100 mGy occurred for acute myeloid leukaemia (ERR=0.0002, 95% CI <-0.02 to 0.24, p-trend>0.5, 85 cases) or leukaemia excluding CLL (ERR=0.05, 95% CI <-0.09 to 0.24, p-trend=0.21, 155 cases). No significant dose-response trends were observed overall for CLL (ERR<-0.023, 95% CI <-0.025 to 0.18, p-trend=0.45, 32 cases), non-Hodgkin lymphoma (ERR=0.03, 95% CI <-0.2 to 0.18, p-trend=0.4, 201 cases) or multiple myeloma (ERR=0.003, 95% CI -0.02 to 0.16, p-trend>0.5, 112 cases). Findings did not differ significantly by demographic factors, smoking or specific radiological procedures performed. CONCLUSION After follow-up averaging 22 years, there was little evidence of a relationship between occupational radiation exposure and myeloid or lymphoid haematopoietic neoplasms.
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Affiliation(s)
- Martha S Linet
- National Cancer Institute Division of Cancer Epidemiology and Genetics, Bethesda, Maryland, USA
| | - Mark P Little
- National Cancer Institute Division of Cancer Epidemiology and Genetics, Bethesda, Maryland, USA
| | - Cari M Kitahara
- National Cancer Institute Division of Cancer Epidemiology and Genetics, Bethesda, Maryland, USA
| | - Elizabeth K Cahoon
- National Cancer Institute Division of Cancer Epidemiology and Genetics, Bethesda, Maryland, USA
| | - Michele M Doody
- National Cancer Institute Division of Cancer Epidemiology and Genetics, Bethesda, Maryland, USA
| | - Steven L Simon
- National Cancer Institute Division of Cancer Epidemiology and Genetics, Bethesda, Maryland, USA
| | - Bruce H Alexander
- Division of Environmental Health Sciences, University of Minnesota, Minneapolis, Minnesota, USA
| | - Dale L Preston
- self-employed at Hirosoft International, Eureka, California, USA
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Hauptmann M, Daniels RD, Cardis E, Cullings HM, Kendall G, Laurier D, Linet MS, Little MP, Lubin JH, Preston DL, Richardson DB, Stram DO, Thierry-Chef I, Schubauer-Berigan MK, Gilbert ES, Berrington de Gonzalez A. Epidemiological Studies of Low-Dose Ionizing Radiation and Cancer: Summary Bias Assessment and Meta-Analysis. J Natl Cancer Inst Monogr 2020; 2020:188-200. [PMID: 32657347 PMCID: PMC8454205 DOI: 10.1093/jncimonographs/lgaa010] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 03/26/2020] [Indexed: 07/27/2023] Open
Abstract
BACKGROUND Ionizing radiation is an established carcinogen, but risks from low-dose exposures are controversial. Since the Biological Effects of Ionizing Radiation VII review of the epidemiological data in 2006, many subsequent publications have reported excess cancer risks from low-dose exposures. Our aim was to systematically review these studies to assess the magnitude of the risk and whether the positive findings could be explained by biases. METHODS Eligible studies had mean cumulative doses of less than 100 mGy, individualized dose estimates, risk estimates, and confidence intervals (CI) for the dose-response and were published in 2006-2017. We summarized the evidence for bias (dose error, confounding, outcome ascertainment) and its likely direction for each study. We tested whether the median excess relative risk (ERR) per unit dose equals zero and assessed the impact of excluding positive studies with potential bias away from the null. We performed a meta-analysis to quantify the ERR and assess consistency across studies for all solid cancers and leukemia. RESULTS Of the 26 eligible studies, 8 concerned environmental, 4 medical, and 14 occupational exposure. For solid cancers, 16 of 22 studies reported positive ERRs per unit dose, and we rejected the hypothesis that the median ERR equals zero (P = .03). After exclusion of 4 positive studies with potential positive bias, 12 of 18 studies reported positive ERRs per unit dose (P = .12). For leukemia, 17 of 20 studies were positive, and we rejected the hypothesis that the median ERR per unit dose equals zero (P = .001), also after exclusion of 5 positive studies with potential positive bias (P = .02). For adulthood exposure, the meta-ERR at 100 mGy was 0.029 (95% CI = 0.011 to 0.047) for solid cancers and 0.16 (95% CI = 0.07 to 0.25) for leukemia. For childhood exposure, the meta-ERR at 100 mGy for leukemia was 2.84 (95% CI = 0.37 to 5.32); there were only two eligible studies of all solid cancers. CONCLUSIONS Our systematic assessments in this monograph showed that these new epidemiological studies are characterized by several limitations, but only a few positive studies were potentially biased away from the null. After exclusion of these studies, the majority of studies still reported positive risk estimates. We therefore conclude that these new epidemiological studies directly support excess cancer risks from low-dose ionizing radiation. Furthermore, the magnitude of the cancer risks from these low-dose radiation exposures was statistically compatible with the radiation dose-related cancer risks of the atomic bomb survivors.
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Affiliation(s)
- Michael Hauptmann
- Correspondence to: Michael Hauptmann, Institute of Biostatistics and Registry Research, Brandenburg Medical School Theodor Fontane. Fehrbelliner Straße 38, 16816 Neuruppin, Germany (e-mail: )
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Berrington de Gonzalez A, Daniels RD, Cardis E, Cullings HM, Gilbert E, Hauptmann M, Kendall G, Laurier D, Linet MS, Little MP, Lubin JH, Preston DL, Richardson DB, Stram D, Thierry-Chef I, Schubauer-Berigan MK. Epidemiological Studies of Low-Dose Ionizing Radiation and Cancer: Rationale and Framework for the Monograph and Overview of Eligible Studies. J Natl Cancer Inst Monogr 2020; 2020:97-113. [PMID: 32657348 PMCID: PMC7610154 DOI: 10.1093/jncimonographs/lgaa009] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/13/2020] [Indexed: 12/21/2022] Open
Abstract
Whether low-dose ionizing radiation can cause cancer is a critical and long-debated question in radiation protection. Since the Biological Effects of Ionizing Radiation report by the National Academies in 2006, new publications from large, well-powered epidemiological studies of low doses have reported positive dose-response relationships. It has been suggested, however, that biases could explain these findings. We conducted a systematic review of epidemiological studies with mean doses less than 100 mGy published 2006-2017. We required individualized doses and dose-response estimates with confidence intervals. We identified 26 eligible studies (eight environmental, four medical, and 14 occupational), including 91 000 solid cancers and 13 000 leukemias. Mean doses ranged from 0.1 to 82 mGy. The excess relative risk at 100 mGy was positive for 16 of 22 solid cancer studies and 17 of 20 leukemia studies. The aim of this monograph was to systematically review the potential biases in these studies (including dose uncertainty, confounding, and outcome misclassification) and to assess whether the subset of minimally biased studies provides evidence for cancer risks from low-dose radiation. Here, we describe the framework for the systematic bias review and provide an overview of the eligible studies.
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Affiliation(s)
| | - Robert D Daniels
- National Institute for Occupational Safety and Health, Cincinnati, OH, USA
| | - Elisabeth Cardis
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Catalonia, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Catalonia, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | | | - Ethel Gilbert
- Division of Cancer Epidemiology & Genetics, Radiation Epidemiology Branch, Bethesda, MD, USA
| | - Michael Hauptmann
- Department of Epidemiology and Biostatistics, Netherlands Cancer Institute, Amsterdam, the Netherlands
- Brandenburg Medical School Theodor Fontane, Institute of Biostatistics and Registry Research, Neuruppin, Germany
| | | | | | - Martha S Linet
- Division of Cancer Epidemiology & Genetics, Radiation Epidemiology Branch, Bethesda, MD, USA
| | - Mark P Little
- Division of Cancer Epidemiology & Genetics, Radiation Epidemiology Branch, Bethesda, MD, USA
| | - Jay H Lubin
- Division of Cancer Epidemiology & Genetics, Radiation Epidemiology Branch, Bethesda, MD, USA
| | | | | | - Daniel Stram
- University of Southern California, Los Angeles, CA
| | - Isabelle Thierry-Chef
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Catalonia, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Catalonia, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
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Eslinger PW, Degteva MO, Napier BA, Tolstykh EI, Tokareva EE. Individual doses for super cohort members exposed to atmospheric radioiodine from the Mayak releases with an emphasis on prenatal doses. J Environ Radioact 2020; 217:106219. [PMID: 32217251 DOI: 10.1016/j.jenvrad.2020.106219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 02/23/2020] [Accepted: 02/24/2020] [Indexed: 06/10/2023]
Abstract
Time-dependent thyroid doses were reconstructed for 45,837 members of the Southern Urals Population Exposed to Radiation Cohort (SUPER-C) living in the region around the Mayak Production Association facilities in Russia from 131I released to the atmosphere from all relevant exposure pathways. The dose calculations are implemented in a Monte Carlo framework that produces best estimates and stochastic realizations of dose time-histories. The arithmetic mean thyroid dose from 131I for SUPER-C members was 195 mGy; the median was 61 mGy. Overall, 131I-thyroid doses for about 3.6% of SUPER-C members were larger than 1 Gy. For children born in 1940-1950, the dose was about 10% higher than in previous studies because doses during the prenatal period for 9,117 individuals are included in the current work. Half of the individuals born in the region in 1950-1960 who remained in the study domain through 1972 received 9.4% or more of their total dose during the prenatal period. SUPER-C members residing in areas contaminated by discharges of liquid radioactive releases into the Techa River or the Kyshtym Accident in 1957 received 80% of their thyroid dose from airborne 131I emissions.
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Affiliation(s)
- Paul W Eslinger
- Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA.
| | - Marina O Degteva
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk, 454076, Russia.
| | - Bruce A Napier
- Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA.
| | - Evgenia I Tolstykh
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk, 454076, Russia.
| | - Elena E Tokareva
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk, 454076, Russia.
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Shishkina EA, Timofeev YS, Volchkova AY, Sharagin PA, Zalyapin VI, Degteva MO, Smith MA, Napier BA. Trabecula: A Random Generator of Computational Phantoms for Bone Marrow Dosimetry. Health Phys 2020; 118:53-59. [PMID: 31764420 DOI: 10.1097/hp.0000000000001127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study was motivated by the efforts to evaluate radiation risk for leukemia incidence in the Techa River cohort, where the main bone marrow dose contributors were Sr (bone-seeking beta emitters). Energy deposition in bone marrow targets was evaluated by simulating radiation particle transport using computational phantoms. The present paper describes the computer program Trabecula implementing an algorithm for parametric generation of computational phantoms, which serve as the basis for calculating bone marrow doses. Trabecula is a user-friendly tool that automatically converts analytical models into voxelized representations that are directly compatible as input to Monte Carlo N Particle code.
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Affiliation(s)
| | - Y S Timofeev
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - A Y Volchkova
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - P A Sharagin
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - V I Zalyapin
- Southern Urals State University (SUSU), Chelyabinsk, Russia
| | - M O Degteva
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - M A Smith
- Pacific Northwest National Laboratory, Richland, WA
| | - B A Napier
- Pacific Northwest National Laboratory, Richland, WA
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Degteva MO, Napier BA, Tolstykh EI, Shishkina EA, Shagina NB, Volchkova AY, Bougrov NG, Smith MA, Anspaugh LR. Enhancements in the Techa River Dosimetry System: TRDS-2016D Code for Reconstruction of Deterministic Estimates of Dose From Environmental Exposures. Health Phys 2019; 117:378-387. [PMID: 30958804 DOI: 10.1097/hp.0000000000001067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Waterborne releases to the Techa River from the Mayak plutonium facility in Russia during 1949-1956 resulted in significant doses to persons living downstream. The dosimetry system Techa River Dosimetry System-2016D has been developed, which provides individual doses of external and internal exposure for the members of the Techa River cohort and other persons who were exposed to releases of radioactive material to the Southern Urals. The results of computation of individual doses absorbed in red bone marrow and extraskeletal tissues for the Techa River cohort members (29,647 persons) are presented, which are based on residence histories on the contaminated Techa River and the East Urals Radioactive Trace, which was formed in 1957 as a result of the Kyshtym Accident. Available Sr body-burden measurements and available information on individual household locations have been used for refinement of individual dose estimates. Techa River Dosimetry System-2016D-based dose estimates will be used for verification of risk of low-dose-rate effects of ionizing radiation in the Techa River cohort.
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Affiliation(s)
- M O Degteva
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - B A Napier
- Battelle Pacific Northwest National Laboratory, Richland, WA
| | - E I Tolstykh
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - E A Shishkina
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - N B Shagina
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - A Yu Volchkova
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - N G Bougrov
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - M A Smith
- Battelle Pacific Northwest National Laboratory, Richland, WA
| | - L R Anspaugh
- Emeritus, Department of Radiology, University of Utah, Salt Lake City, UT
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25
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Shore RE, Beck HL, Boice JD, Caffrey EA, Davis S, Grogan HA, Mettler FA, Preston RJ, Till JE, Wakeford R, Walsh L, Dauer LT. Recent Epidemiologic Studies and the Linear No-Threshold Model For Radiation Protection-Considerations Regarding NCRP Commentary 27. Health Phys 2019; 116:235-246. [PMID: 30585971 DOI: 10.1097/hp.0000000000001015] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
National Council on Radiation Protection and Measurements Commentary 27 examines recent epidemiologic data primarily from low-dose or low dose-rate studies of low linear-energy-transfer radiation and cancer to assess whether they support the linear no-threshold model as used in radiation protection. The commentary provides a critical review of low-dose or low dose-rate studies, most published within the last 10 y, that are applicable to current occupational, environmental, and medical radiation exposures. The strengths and weaknesses of the epidemiologic methods, dosimetry assessments, and statistical modeling of 29 epidemiologic studies of total solid cancer, leukemia, breast cancer, and thyroid cancer, as well as heritable effects and a few nonmalignant conditions, were evaluated. An appraisal of the degree to which the low-dose or low dose-rate studies supported a linear no-threshold model for radiation protection or on the contrary, demonstrated sufficient evidence that the linear no-threshold model is inappropriate for the purposes of radiation protection was also included. The review found that many, though not all, studies of solid cancer supported the continued use of the linear no-threshold model in radiation protection. Evaluations of the principal studies of leukemia and low-dose or low dose-rate radiation exposure also lent support for the linear no-threshold model as used in protection. Ischemic heart disease, a major type of cardiovascular disease, was examined briefly, but the results of recent studies were considered too weak or inconsistent to allow firm conclusions regarding support of the linear no-threshold model. It is acknowledged that the possible risks from very low doses of low linear-energy-transfer radiation are small and uncertain and that it may never be possible to prove or disprove the validity of the linear no-threshold assumption by epidemiologic means. Nonetheless, the preponderance of recent epidemiologic data on solid cancer is supportive of the continued use of the linear no-threshold model for the purposes of radiation protection. This conclusion is in accord with judgments by other national and international scientific committees, based on somewhat older data. Currently, no alternative dose-response relationship appears more pragmatic or prudent for radiation protection purposes than the linear no-threshold model.
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Affiliation(s)
- Roy E Shore
- New York University School of Medicine, New York, NY, and Radiation Effects Research Foundation, Hiroshima, Japan (retired)
| | | | - John D Boice
- National Council on Radiation Protection and Measurements, Bethesda, MD, and Vanderbilt University, Nashville, TN
| | | | - Scott Davis
- Fred Hutchinson Cancer Research Center, Seattle, WA
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26
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Аkleyev АА. PECULIARITIES OF DYNAMICS OF PERIPHERAL BLOOD CELL COMPOSITION IN CHRONICALLY-EXPOSED INDIVIDUALS IN THE PERIOD PRIOR TO LEUKEMIA DEVELOPMENT. Radiat Prot Dosimetry 2018; 182:154-162. [PMID: 31222317 DOI: 10.1093/rpd/ncy151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 08/02/2018] [Indexed: 06/09/2023]
Abstract
A retrospective analysis of the peripheral blood cell composition (PBCC) has been performed among 43 chronically-exposed Techa riverside residents later diagnosed with chronic myeloid leukemia (CML) or acute leukemias (AL). Prior to CML development, a significant increase in peripheral blood neutrophil count has been noted in exposed individuals for many years. Neutrophil count grew most significantly after reduction of exposure dose rate to red bone marrow (RBM) to ≤0.1 Gy, which was typical both for CML and AL. An increase of a relative neutrophil count remained in the CML latency period along with relative lymphocytopenia. Peculiarities of PBCC among individuals with AL at a later date were 'rejuvenation' of neutrophils in the period of maximum exposure and in leukemia latency period. During haematopoiesis restoration period, high mean values of mature neutrophils were detected in the majority of exposed individuals with AL together with decreased lymphocyte and eosinophil count. Later higher mean values of neutrophils remained in these individuals.
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MESH Headings
- Adolescent
- Adult
- Aged
- Blood Cells/pathology
- Blood Cells/radiation effects
- Bone Marrow/pathology
- Bone Marrow/radiation effects
- Female
- Follow-Up Studies
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/etiology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Leukemia, Myeloid, Acute/etiology
- Leukemia, Myeloid, Acute/pathology
- Male
- Middle Aged
- Neutrophils/pathology
- Neutrophils/radiation effects
- Prognosis
- Radiation Exposure/adverse effects
- Retrospective Studies
- Young Adult
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Affiliation(s)
- А А Аkleyev
- Department of Microbiology, Virology, Immunology and Clinical Laboratory Diagnostics, South-Ural State Medical University, Chelyabinsk, Russian Federation
- Urals Research Center for Radiation Medicine (URCRM), Laboratory of Molecular and Cellular Radiobiology, Chelyabinsk, Russian Federation
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27
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Tang FR, Loganovsky K. Low dose or low dose rate ionizing radiation-induced health effect in the human. J Environ Radioact 2018; 192:32-47. [PMID: 29883875 DOI: 10.1016/j.jenvrad.2018.05.018] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 05/28/2018] [Indexed: 06/08/2023]
Abstract
The extensive literature review on human epidemiological studies suggests that low dose ionizing radiation (LDIR) (≤100 mSv) or low dose rate ionizing radiation (LDRIR) (<6mSv/H) exposure could induce either negative or positive health effects. These changes may depend on genetic background, age (prenatal day for embryo), sex, nature of radiation exposure, i.e., acute or chronic irradiation, radiation sources (such as atomic bomb attack, fallout from nuclear weapon test, nuclear power plant accidents, 60Co-contaminated building, space radiation, high background radiation, medical examinations or procedures) and radionuclide components and human epidemiological experimental designs. Epidemiological and clinical studies show that LDIR or LDRIR exposure may induce cancer, congenital abnormalities, cardiovascular and cerebrovascular diseases, cognitive and other neuropsychiatric disorders, cataracts and other eye and somatic pathology (endocrine, bronchopulmonary, digestive, etc). LDIR or LDRIR exposure may also reduce mutation and cancer mortality rates. So far, the mechanisms of LDIR- or LDRIR -induced health effect are poorly understood. Further extensive studies are still needed to clarify under what circumstances, LDIR or LDRIR exposure may induce positive or negative effects, which may facilitate development of new therapeutic approaches to prevent or treat the radiation-induced human diseases or enhance radiation-induced positive health effect.
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Affiliation(s)
- Feng Ru Tang
- Singapore Nuclear Research and Safety Initiative, National University of Singapore, 138602, Singapore.
| | - Konstantin Loganovsky
- Radiation Psychoneurology Department, Institute of Clinical Radiology, State Institution "National Research Centre for Radiation Medicne, National Academy of Medical Sciences of Ukraine", 53 Melnikov Str., Kyiv, 04050, Ukraine
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28
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Ulsh BA. A critical evaluation of the NCRP COMMENTARY 27 endorsement of the linear no-threshold model of radiation effects. Environ Res 2018; 167:472-487. [PMID: 30138826 DOI: 10.1016/j.envres.2018.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 07/31/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
Regulatory policy to protect the public and the environment from radiation is universally based on the linear, no-threshold model (LNT) of radiation effects. This model has been controversial since its inception over nine decades ago, and remains so to this day, but it has proved remarkably resistant to challenge from the scientific community. The LNT model has been repeatedly endorsed by expert advisory bodies, and regulatory agencies in turn adopt policies that reflect this advice. Unfortunately, these endorsements rest on a foundation of institutional inertia and numerous logical fallacies. These include most significantly setting the LNT as the null hypothesis, and shifting the burden of proof onto LNT skeptics. Other examples include arbitrary exclusion of alternative hypotheses, ignoring criticisms of the LNT, cherry-picking evidence, and making policy judgements without foundation. This paper presents an evaluation of the National Council on Radiation Protection and Measurements' (NCRP) Commentary 27, which concluded that recent epidemiological studies are compatible with the continued use of the LNT model for radiation protection. While this report will likely provide political cover for regulators' continued reliance on the LNT, it is a missed opportunity to advance the scientific discussion of the effects of low dose, low dose-rate radiation exposure. Due to its Congressionally chartered mission, no organization is better positioned than the NCRP to move this debate forward, and recommendations for doing so in future reviews are provided.
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Affiliation(s)
- Brant A Ulsh
- M. H. Chew & Associates, 7633 Southfront Rd, Ste. 170, Livermore, CA 94551-8211, United States.
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29
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Karabulutoglu M, Finnon R, Imaoka T, Friedl AA, Badie C. Influence of diet and metabolism on hematopoietic stem cells and leukemia development following ionizing radiation exposure. Int J Radiat Biol 2018; 95:452-479. [PMID: 29932783 DOI: 10.1080/09553002.2018.1490042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE The review aims to discuss the prominence of dietary and metabolic regulators in maintaining hematopoietic stem cell (HSC) function, long-term self-renewal, and differentiation. RESULTS Most adult stem cells are preserved in a quiescent, nonmotile state in vivo which acts as a "protective state" for stem cells to reduce endogenous stress provoked by DNA replication and cellular respiration as well as exogenous environmental stress. The dynamic balance between quiescence, self-renewal and differentiation is critical for supporting a functional blood system throughout life of an organism. Stress-conditions, for example ionizing radiation exposure can trigger the blood forming HSCs to proliferate and migrate through extramedullary tissues to expand the number of HSCs and increase hematopoiesis. In addition, a wealth of investigation validated that deregulation of this balance plays a critical pathogenic role in various different hematopoietic diseases including the leukemia development. CONCLUSION The review summarizes the current knowledge on how alterations in dietary and metabolic factors could alter the risk of leukemia development following ionizing radiation exposure by inhibiting or even reversing the leukemic progression. Understanding the influence of diet, metabolism, and epigenetics on radiation-induced leukemogenesis may lead to the development of practical interventions to reduce the risk in exposed populations.
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Affiliation(s)
- Melis Karabulutoglu
- a Cancer Mechanisms and Biomarkers group, Biological Effects Department, Centre for Radiation, Chemical and Environmental Hazards , Public Health England , Didcot , UK.,b CRUK & MRC Oxford Institute for Radiation Oncology, Department of Oncology , University of Oxford , Oxford , UK
| | - Rosemary Finnon
- a Cancer Mechanisms and Biomarkers group, Biological Effects Department, Centre for Radiation, Chemical and Environmental Hazards , Public Health England , Didcot , UK
| | - Tatsuhiko Imaoka
- c Department of Radiation Effects Research, National Institute of Radiological Sciences , National Institutes for Quantum and Radiological Science and Technology , Chiba , Japan
| | - Anna A Friedl
- d Department of Radiation Oncology , University Hospital, LMU Munich , Munich , Germany
| | - Christophe Badie
- a Cancer Mechanisms and Biomarkers group, Biological Effects Department, Centre for Radiation, Chemical and Environmental Hazards , Public Health England , Didcot , UK
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30
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Shore RE, Beck HL, Boice JD, Caffrey EA, Davis S, Grogan HA, Mettler FA, Preston RJ, Till JE, Wakeford R, Walsh L, Dauer LT. Implications of recent epidemiologic studies for the linear nonthreshold model and radiation protection. J Radiol Prot 2018; 38:1217-1233. [PMID: 30004025 DOI: 10.1088/1361-6498/aad348] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The recently published NCRP Commentary No. 27 evaluated the new information from epidemiologic studies as to their degree of support for applying the linear nonthreshold (LNT) model of carcinogenic effects for radiation protection purposes (NCRP 2018 Implications of Recent Epidemiologic Studies for the Linear Nonthreshold Model and Radiation Protection, Commentary No. 27 (Bethesda, MD: National Council on Radiation Protection and Measurements)). The aim was to determine whether recent epidemiologic studies of low-LET radiation, particularly those at low doses and/or low dose rates (LD/LDR), broadly support the LNT model of carcinogenic risk or, on the contrary, demonstrate sufficient evidence that the LNT model is inappropriate for the purposes of radiation protection. An updated review was needed because a considerable number of reports of radiation epidemiologic studies based on new or updated data have been published since other major reviews were conducted by national and international scientific committees. The Commentary provides a critical review of the LD/LDR studies that are most directly applicable to current occupational, environmental and medical radiation exposure circumstances. This Memorandum summarises several of the more important LD/LDR studies that incorporate radiation dose responses for solid cancer and leukemia that were reviewed in Commentary No. 27. In addition, an overview is provided of radiation studies of breast and thyroid cancers, and cancer after childhood exposures. Non-cancers are briefly touched upon such as ischemic heart disease, cataracts, and heritable genetic effects. To assess the applicability and utility of the LNT model for radiation protection, the Commentary evaluated 29 epidemiologic studies or groups of studies, primarily of total solid cancer, in terms of strengths and weaknesses in their epidemiologic methods, dosimetry approaches, and statistical modelling, and the degree to which they supported a LNT model for continued use in radiation protection. Recommendations for how to make epidemiologic radiation studies more informative are outlined. The NCRP Committee recognises that the risks from LD/LDR exposures are small and uncertain. The Committee judged that the available epidemiologic data were broadly supportive of the LNT model and that at this time no alternative dose-response relationship appears more pragmatic or prudent for radiation protection purposes.
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Affiliation(s)
- R E Shore
- New York University School of Medicine, New York, United States of America. Radiation Effects Research Foundation, Hiroshima, Japan
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31
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Cardarelli JJ, Ulsh BA. It Is Time to Move Beyond the Linear No-Threshold Theory for Low-Dose Radiation Protection. Dose Response 2018; 16:1559325818779651. [PMID: 30013457 PMCID: PMC6043938 DOI: 10.1177/1559325818779651] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/18/2018] [Accepted: 05/01/2018] [Indexed: 02/03/2023] Open
Abstract
The US Environmental Protection Agency (USEPA) is the primary federal agency responsible for promulgating regulations and policies to protect people and the environment from ionizing radiation. Currently, the USEPA uses the linear no-threshold (LNT) model to estimate cancer risks and determine cleanup levels in radiologically contaminated environments. The LNT model implies that there is no safe dose of ionizing radiation; however, adverse effects from low dose, low-dose rate (LDDR) exposures are not detectable. This article (1) provides the scientific basis for discontinuing use of the LNT model in LDDR radiation environments, (2) shows that there is no scientific consensus for using the LNT model, (3) identifies USEPA reliance on outdated scientific information, and (4) identifies regulatory reliance on incomplete evaluations of recent data contradicting the LNT. It is the time to reconsider the use of the LNT model in LDDR radiation environments. Incorporating the latest science into the regulatory process for risk assessment will (1) ensure science remains the foundation for decision making, (2) reduce unnecessary burdens of costly cleanups, (3) educate the public on the real effects of LDDR radiation exposures, and (4) harmonize government policies with the rest of the radiation scientific community.
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32
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Abstract
Hormesis can be explained by evolutionary adaptation to the current level of a factor present in the natural environment or to some average from the past. This pertains also to ionizing radiation as the natural background has been decreasing during the time of the life existence. DNA damage and repair are normally in a dynamic balance. The conservative nature of the DNA repair suggests that cells may have retained some capability to repair damage from higher radiation levels than that existing today. According to this concept, the harm caused by radioactive contamination would tend to zero with a dose rate tending to a wide range level of the natural radiation background. Existing evidence in favor of hormesis is substantial, experimental data being partly at variance with results of epidemiological studies. Potential bias, systematic errors, and motives to exaggerate risks from low-dose low-rate ionizing radiation are discussed here. In conclusion, current radiation safety norms are exceedingly restrictive and should be revised on the basis of scientific evidence. Elevation of the limits must be accompanied by measures guaranteeing their observance.
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Affiliation(s)
- S V Jargin
- Peoples' Friendship University of Russia, Moscow, Russian Federation
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33
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Rühm W, Azizova T, Bouffler S, Cullings HM, Grosche B, Little MP, Shore RS, Walsh L, Woloschak GE. Typical doses and dose rates in studies pertinent to radiation risk inference at low doses and low dose rates. J Radiat Res 2018; 59:ii1-ii10. [PMID: 29432579 PMCID: PMC5941142 DOI: 10.1093/jrr/rrx093] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/06/2017] [Accepted: 02/05/2018] [Indexed: 05/20/2023]
Abstract
In order to quantify radiation risks at exposure scenarios relevant for radiation protection, often extrapolation of data obtained at high doses and high dose rates down to low doses and low dose rates is needed. Task Group TG91 on 'Radiation Risk Inference at Low-dose and Low-dose Rate Exposure for Radiological Protection Purposes' of the International Commission on Radiological Protection is currently reviewing the relevant cellular, animal and human studies that could be used for that purpose. This paper provides an overview of dose rates and doses typically used or present in those studies, and compares them with doses and dose rates typical of those received by the A-bomb survivors in Japan.
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Affiliation(s)
- Werner Rühm
- Institute of Radiation Protection, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Tamara Azizova
- Southern Urals Biophysics Institute (SUBI), Ozyorskoe Shosse 19, 456780, Ozyorsk, Chelyabinsk Region, Russian Federation
| | - Simon Bouffler
- Centre for Radiation, Chemical and Environmental Hazards, Public Health England (PHE), Chilton, Didcot OX11 ORQ, UK
| | - Harry M Cullings
- Radiation Effects Research Foundation, 5–2 Hijiyama Park, Minami-ku, Hiroshima 732-0815, Japan
| | - Bernd Grosche
- Federal Office for Radiation Protection, Ingolstädter Landstr. 1, 85764 Oberschleißheim, Germany
| | - Mark P Little
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Bethesda, MD 20892-9778, USA
| | - Roy S Shore
- New York University School of Medicine, 650 First Ave., New York, NY 10016, USA
| | - Linda Walsh
- Medical Physics Group, Department of Physics, Science Faculty, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Gayle E Woloschak
- Departments of Radiation Oncology, Radiology, and Cell and Molecular Biology, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, 300 E. Superior St., Tarry 4-760, Chicago, IL 60611, USA
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34
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Abstract
Ionizing radiation is a valuable tool in many spheres of human life. At the same time, it is a genotoxic agent with a well-established carcinogenic potential. Progress achieved in the last two decades has demonstrated convincingly that ionizing radiation can also target the cellular epigenome. Epigenetics is defined as heritable changes in the expression of genes that are not due to alterations of DNA sequence but consist of specific covalent modifications of chromatin components, such as methylation of DNA, histone modifications, and control performed by non-coding RNAs. Accumulating evidence suggests that DNA methylation, a key epigenetic mechanism involved in the control of expression of genetic information, may serve as one of the driving mechanisms of radiation-induced carcinogenesis. Here, we review the literature on the effects of ionizing radiation on DNA methylation in various biological systems, discuss the role of DNA methylation in radiation carcinogenesis, and provide our opinion on the potential utilization of this knowledge in radiation oncology.
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Affiliation(s)
- Isabelle R. Miousse
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Laura E. Ewing
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Kristy R. Kutanzi
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Robert J. Griffin
- Department of Radiation Oncology, Radiation Biology Division, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Igor Koturbash
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, Arkansas
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35
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Hsieh WH, Lin IF, Ho JC, Chang PW. 30 years follow-up and increased risks of breast cancer and leukaemia after long-term low-dose-rate radiation exposure. Br J Cancer 2017; 117:1883-1887. [PMID: 28972968 PMCID: PMC5729469 DOI: 10.1038/bjc.2017.350] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 08/19/2017] [Accepted: 09/07/2017] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The current study followed-up site-specific cancer risks in an unique cohort with 30 years' follow-up after long-term low-dose-rate radiation exposure in Taiwan. METHODS Six thousand two hundred and forty two Taiwanese people received extra exposure in residential and school buildings constructed with Co-60-contaminated steel from 1982 until informed and relocated in early 1990s. The additional doses received have been estimated. During 1983-2012, 300 cancer cases were identified through the national cancer registry in Taiwan, 247 cases with minimum latent periods from initial exposure. The hazard ratios (HR) of site-specific cancers were estimated with additional cumulative exposure estimated individually. RESULTS Dose-dependent risks were statistically significantly increased for leukaemia excluding chronic lymphocytic leukaemia (HR100mSv 1.18; 90% CI 1.04-1.28), breast cancers (HR100mSv 1.11; 90% CI 1.05-1.20), and all cancers (HR100mSv 1.05; 90% CI 1.0-1.08, P=0.04). Women with an initial age of exposure lower than 20 were shown with dose response increase in breast cancers risks (HR100mSv 1.38; 90% CI 1.14-1.60; P=0.0008). CONCLUSIONS Radiation exposure before age 20 was associated with a significantly increased risk of breast cancer at much lower radiation exposure than observed previously.
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Affiliation(s)
- Wan-Hua Hsieh
- Department of Public Health, Tzu Chi University, Hualien 970, Taiwan
| | - I-Feng Lin
- Institute of Public Health, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan
| | - Jung-Chun Ho
- School of Oral Hygiene, Taipei Medical University, Taipei 110, Taiwan
- Department of Nursing, Kang-Ning University, Taipei 114, Taiwan
| | - Peter Wushou Chang
- Taipei Hospital, Ministry of Health and Welfare, New Taipei City 242, Taiwan
- National Health Research Institute, Miaoli 350, Taiwan
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36
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Desbiolles A, Roudier C, Goria S, Stempfelet M, Kairo C, Quintin C, Bidondo M, Monnereau A, Vacquier B. Cancer incidence in adults living in the vicinity of nuclear power plants in France, based on data from the French Network of Cancer Registries. Int J Cancer 2017; 142:899-909. [DOI: 10.1002/ijc.31116] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/03/2017] [Accepted: 10/10/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Alice Desbiolles
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
| | - Candice Roudier
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
| | - Sarah Goria
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
| | - Morgane Stempfelet
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
| | - Cécile Kairo
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
| | - Cécile Quintin
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
| | - Marie‐Laure Bidondo
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
| | - Alain Monnereau
- French Network of Cancer Registries (FRANCIM) and INSERM U1219 EPICENE Team, Bordeaux France
| | - Blandine Vacquier
- Santé publique France, French National Public Health AgencySaint‐MauriceF‐94415 France
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37
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Napier BA, Eslinger PW, Tolstykh EI, Vorobiova MI, Tokareva EE, Akhramenko BN, Krivoschapov VA, Degteva MO. Calculations of individual doses for Techa River Cohort members exposed to atmospheric radioiodine from Mayak releases. J Environ Radioact 2017; 178-179:156-167. [PMID: 28843165 DOI: 10.1016/j.jenvrad.2017.08.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 08/16/2017] [Accepted: 08/16/2017] [Indexed: 06/07/2023]
Abstract
Time-dependent thyroid doses were reconstructed for over 29,000 Techa River Cohort members living near the Mayak production facilities from 131I released to the atmosphere for all relevant exposure pathways. The calculational approach uses four general steps: 1) construct estimates of releases of 131I to the air from production facilities; 2) model the transport of 131I in the air and subsequent deposition on the ground and vegetation; 3) model the accumulation of 131I in environmental media; and 4) calculate individualized doses. The dose calculations are implemented in a Monte Carlo framework that produces best estimates and confidence intervals of dose time-histories. Other radionuclide contributors to thyroid dose were evaluated. The 131I contribution was 75-99% of the thyroid dose. The mean total thyroid dose for cohort members was 193 mGy and the median was 53 mGy. Thyroid doses for about 3% of cohort members were larger than 1 Gy. About 7% of children born in 1940-1950 had doses larger than 1 Gy. The uncertainty in the 131I dose estimates is low enough for this approach to be used in regional epidemiological studies.
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Affiliation(s)
- Bruce A Napier
- Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA.
| | - Paul W Eslinger
- Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, WA, 99354, USA.
| | - Evgenia I Tolstykh
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk 454076, Russia.
| | - Marina I Vorobiova
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk 454076, Russia.
| | - Elena E Tokareva
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk 454076, Russia.
| | - Boris N Akhramenko
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk 454076, Russia.
| | - Victor A Krivoschapov
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk 454076, Russia.
| | - Marina O Degteva
- Urals Research Center for Radiation Medicine, Biophysics Laboratory, 68-a, Vorovsky Street, Chelyabinsk 454076, Russia.
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Jargin SV. Re: The high price of public fear of low-dose radiation. J Radiol Prot 2017; 37:797-799. [PMID: 28675752 DOI: 10.1088/1361-6498/aa7c69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Sergei V Jargin
- People's Friendship University of Russia, Clementovski per 6-82, 115184 Moscow, Russia
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Krestinina LY, Kharyuzov YE, Epiphanova SB, Tolstykh EI, Deltour I, Schüz J, Akleyev AV. Cancer Incidence after In Utero Exposure to Ionizing Radiation in Techa River Residents. Radiat Res 2017; 188:314-324. [PMID: 28715276 DOI: 10.1667/rr14695.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Health effects of in utero exposure to ionizing radiation, especially among adults, are still unclear. The aim of this study was to analyze cancer risk in a cohort of subjects exposed in utero due to releases of nuclear waste into the Techa River in the Southern Urals, taking into account additional postnatal exposure. Analysis for solid cancer was based on 242 cases among 10,482 cohort members, accumulating 381,948 person-years at risk, with follow-up from 1956-2009, while analysis for hematological malignancies was based on 26 cases among 11,070 persons, with 423,502 person-years at risk, with follow-up from 1953-2009. Mean doses accumulated in soft tissues and in red bone marrow during the prenatal period were 4 mGy and 30 mGy, respectively. Additional respective mean postnatal doses received by cohort members were 11 and 84 mGy. Poisson regression analysis was used to estimate the excess relative risk (ERR) of cancer incidence related to in utero and postnatal doses. No association was observed for in utero exposure with solid cancer risk [ERR per 10 mGy: -0.007; 95% confidence interval (CI): <-0.107; 0.148] or with hematological malignancy risk (ERR/10 mGy: -0.011; 95% CI: <-0.015; 0.099). However, ERR of solid cancer increased significantly with increasing postnatal dose (ERR/10 mGy: 0.11; 95% CI: 0.04; 0.22). The very wide confidence intervals in these ERR results are similar to those of studies performed on the LSS cohort and the offspring of the Mayak Female Worker Cohort, as well as case-control studies of effects after in utero medical exposure. There were limitations of this study, with decreased statistical power, due to the low prenatal doses received by most of the cohort members, the small number of cancer cases and the absence of cohort members over the age of 59 years (living cohort members had reached 49-59 years of age). Further aging of the cohort and extension of the follow-up period will enhance the statistical power of this study in the future. There is a shortage of cohort studies reporting on the effects of prenatal radiation exposure, as well as information on chronic exposure during the prenatal period. Therefore, further research of this unique cohort will be a useful addition to the published literature on this subject, and a valuable means of elucidating the long-term effects of low-dose radiation exposure in the fetus.
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Affiliation(s)
- L Yu Krestinina
- a Urals Research Center for Radiation Medicine (URCRM), Chelyabinsk, Russian Federation
| | - Yu E Kharyuzov
- a Urals Research Center for Radiation Medicine (URCRM), Chelyabinsk, Russian Federation
| | - S B Epiphanova
- a Urals Research Center for Radiation Medicine (URCRM), Chelyabinsk, Russian Federation
| | - E I Tolstykh
- a Urals Research Center for Radiation Medicine (URCRM), Chelyabinsk, Russian Federation
| | - I Deltour
- b Section of Environment and Radiation, International Agency for Research on Cancer (IARC), Lyon, France
| | - J Schüz
- b Section of Environment and Radiation, International Agency for Research on Cancer (IARC), Lyon, France
| | - A V Akleyev
- a Urals Research Center for Radiation Medicine (URCRM), Chelyabinsk, Russian Federation
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Till JE, Beck HL, Grogan HA, Caffrey EA. A review of dosimetry used in epidemiological studies considered to evaluate the linear no-threshold (LNT) dose-response model for radiation protection. Int J Radiat Biol 2017; 93:1128-1144. [DOI: 10.1080/09553002.2017.1337280] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Affiliation(s)
- John D. Boice
- National Council on Radiation Protection and Measurements, Bethesda, MD, USA
- Department of Medicine, Division of Epidemiology, Vanderbilt University, Nashville, TN, USA
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Hiller MM, Woda C, Bougrov NG, Degteva MO, Ivanov O, Ulanovsky A, Romanov S. External dose reconstruction for the former village of Metlino (Techa River, Russia) based on environmental surveys, luminescence measurements, and radiation transport modelling. Radiat Environ Biophys 2017; 56:139-159. [PMID: 28374124 DOI: 10.1007/s00411-017-0688-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 03/05/2017] [Indexed: 06/07/2023]
Abstract
In the first years of its operation, the Mayak Production Association, a facility part of the Soviet nuclear weapons program in the Southern Urals, Russia, discharged large amounts of radioactively contaminated effluent into the nearby Techa River, thus exposing the people living at this river to external and internal radiations. The Techa River Cohort is a cohort intensely studied in epidemiology to investigate the correlation between low-dose radiation and health effects on humans. For the individuals in the cohort, the Techa River Dosimetry System describes the accumulated dose in human organs and tissues. In particular, organ doses from external exposure are derived from estimates of dose rate in air on the Techa River banks which were estimated from measurements and Monte Carlo modelling. Individual doses are calculated in accordance with historical records of individuals' residence histories, observational data of typical lifestyles for different age groups, and age-dependent conversion factors from air kerma to organ dose. The work here describes an experimentally independent assessment of the key input parameter of the dosimetry system, the integral air kerma, for the former village of Metlino, upper Techa River region. The aim of this work was thus to validate the Techa River Dosimetry System for the location of Metlino in an independent approach. Dose reconstruction based on dose measurements in bricks from a church tower and Monte Carlo calculations was used to model the historic air kerma accumulated in the time from 1949 to 1956 at the shoreline of the Techa River in Metlino. Main issues are caused by a change in the landscape after the evacuation of the village in 1956. Based on measurements and published information and data, two separate models for the historic pre-evacuation geometry and for the current geometry of Metlino were created. Using both models, a value for the air kerma was reconstructed, which agrees with that obtained in the Techa River Dosimetry System within a factor of two.
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Affiliation(s)
- M M Hiller
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Radiation Protection, 85764, Neuherberg, Germany.
| | - C Woda
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Radiation Protection, 85764, Neuherberg, Germany
| | - N G Bougrov
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - M O Degteva
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russia
| | - O Ivanov
- Kurchatov Institute Moscow, Moscow, 123182, Russia
| | - A Ulanovsky
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Radiation Protection, 85764, Neuherberg, Germany
| | - S Romanov
- Southern Urals Biophysics Institute, Ozyorsk, Russia
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Preston DL, Sokolnikov ME, Krestinina LY, Stram DO. Estimates of Radiation Effects on Cancer Risks in the Mayak Worker, Techa River and Atomic Bomb Survivor Studies. Radiat Prot Dosimetry 2017; 173:26-31. [PMID: 27885076 DOI: 10.1093/rpd/ncw316] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
For almost 50 y, the Life Span Study cohort of atomic bomb survivor studies has been the primary source of the quantitative estimates of cancer and non-cancer risks that form the basis of international radiation protection standards. However, the long-term follow-up and extensive individual dose reconstruction for the Russian Mayak worker cohort (MWC) and Techa River cohort (TRC) are providing quantitative information about radiation effects on cancer risks that complement the atomic bomb survivor-based risk estimates. The MWC, which includes ~26 000 men and women who began working at Mayak between 1948 and 1982, is the primary source for estimates of the effects of plutonium on cancer risks and also provides information on the effects of low-dose rate external gamma exposures. The TRC consists of ~30 000 men and women of all ages who received low-dose-rate, low-dose exposures as a consequence of Mayak's release of radioactive material into the Techa River. The TRC data are of interest because the exposures are broadly similar to those experienced by populations exposed as a consequence of nuclear accidents such as Chernobyl. In this presentation, it is described the strengths and limitations of these three cohorts, outline and compare recent solid cancer and leukemia risk estimates and discussed why information from the Mayak and Techa River studies might play a role in the development and refinement of the radiation risk estimates that form the basis for radiation protection standards.
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Affiliation(s)
- Dale L Preston
- Hirosoft International, 1335 H Street, Eureka, CA95501, USA
| | - Mikhail E Sokolnikov
- Epidemiology Laboratory Southern Urals Biophysics Institute, Ozyorskoe Schosse 19, Ozyorsk456780, Russian Federation
| | - Lyudmila Yu Krestinina
- Epidemiology Laboratory, Urals Research Center for Radiation Medicine, 68-A Vorovsky Street, Chelyabinsk454076, Russian Federation
| | - Daniel O Stram
- Division of Biostatistics and Genetic Epidemiology, University of Southern California, Room 116, 2001 N Soto Street, Los Angeles, CA90033, USA
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Abstract
Recognized for conducting cutting-edge science in the field of radiation health effects research, the Department of Energy's (DOE) Russian Health Studies Program has continued to generate excitement and enthusiasm throughout its 23-year mission to assess worker and public health risks from radiation exposure resulting from nuclear weapons production activities in the former Soviet Union. The three goals of the Program are to: (1) clarify the relationship between health effects and chronic, low-to-medium dose radiation exposure; (2) estimate the cancer risks from exposure to gamma, neutron, and alpha radiation; and (3) provide information to the national and international organizations that determine radiation protection standards and practices. Research sponsored by DOE's Russian Health Studies Program is conducted under the authority of the Joint Coordinating Committee for Radiation Effects Research (JCCRER), a bi-national committee representing Federal agencies in the United States and the Russian Federation. Signed in 1994, the JCCRER Agreement established the legal basis for the collaborative research between USA and Russian scientists to determine the risks associated with working at or living near Russian former nuclear weapons production sites. The products of the Program are peer-reviewed publications on cancer risk estimates from worker and community exposure to ionizing radiation following the production of nuclear weapons in Russia. The scientific return on investment has been substantial. Through 31 December 2015, JCCRER researchers have published 299 peer-reviewed publications. To date, the research has focused on the Mayak Production Association (Mayak) in Ozersk, Russia, which is the site of the first Soviet nuclear weapons production facility, and people in surrounding communities along the Techa River. There are five current projects in the Russian Health Studies Program: two radiation epidemiology studies; two historical dose reconstruction studies and a worker biorepository. National and international standard-setting organizations use cancer risk estimates computed from epidemiological and historical dose reconstruction studies to validate or revise radiation protection standards. An overview of the most important research results will be presented.
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Affiliation(s)
- Barrett N. Fountos
- U.S. Department of Energy, Office of Domestic and International Health Studies (AU-13/GTN B-214), 19901 Germantown Road, Germantown, MD 20874
, USA
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Linet MS, Kitahara CM, Ntowe E, Kleinerman RA, Gilbert ES, Naito N, Lipner RS, Miller DL, Berrington de Gonzalez A. Mortality in U.S. Physicians Likely to Perform Fluoroscopy-guided Interventional Procedures Compared with Psychiatrists, 1979 to 2008. Radiology 2017; 284:482-494. [PMID: 28234559 DOI: 10.1148/radiol.2017161306] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Purpose To compare total and cause-specific mortality rates between physicians likely to have performed fluoroscopy-guided interventional (FGI) procedures (referred to as FGI MDs) and psychiatrists to determine if any differences are consistent with known radiation risks. Materials and Methods Mortality risks were compared in nationwide cohorts of 45 634 FGI MDs and 64 401 psychiatrists. Cause of death was ascertained from the National Death Index. Poisson regression was used to estimate relative risks (RRs) and 95% confidence intervals (CIs) for FGI MDs versus psychiatrists, with adjustment (via stratification) for year of birth and attained age. Results During follow-up (1979-2008), 3506 FGI MDs (86 women) and 7814 psychiatrists (507 women) died. Compared with psychiatrists, FGI MDs had lower total (men: RR, 0.80 [95% CI: 0.77, 0.83]; women: RR, 0.80 [95% CI: 0.63, 1.00]) and cancer (men: RR, 0.92 [95% CI: 0.85, 0.99]; women: RR, 0.83 [95% CI: 0.58, 1.18]) mortality. Mortality because of specific types of cancer, total and specific types of circulatory diseases, and other causes were not elevated in FGI MDs compared with psychiatrists. On the basis of small numbers, leukemia mortality was elevated among male FGI MDs who graduated from medical school before 1940 (RR, 3.86; 95% CI: 1.21, 12.3). Conclusion Overall, total deaths and deaths from specific causes were not elevated in FGI MDs compared with psychiatrists. These findings require confirmation in large cohort studies with individual doses, detailed work histories, and extended follow-up of the subjects to substantially older median age at exit. © RSNA, 2017 Online supplemental material is available for this article.
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Affiliation(s)
- Martha S Linet
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Cari M Kitahara
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Estelle Ntowe
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Ruth A Kleinerman
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Ethel S Gilbert
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Neal Naito
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Rebecca S Lipner
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Donald L Miller
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | - Amy Berrington de Gonzalez
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
| | -
- From the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, Room 7E452, Bethesda, MD 20892-9778 (M.S.L., C.M.K., E.N., R.A.K., E.S.G., A.B.d.G.); Retired, U.S. Navy, Washington, DC (N.N.); American Board of Internal Medicine, Philadelphia, Pa (R.S.L.); and Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Md (D.L.M.). Members of the Multi-Specialty Occupational Health Group are listed at the end
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Musilli S, Nicolas N, El Ali Z, Orellana-Moreno P, Grand C, Tack K, Kerdine-Römer S, Bertho JM. DNA damage induced by Strontium-90 exposure at low concentrations in mesenchymal stromal cells: the functional consequences. Sci Rep 2017; 7:41580. [PMID: 28134299 DOI: 10.1038/srep41580] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 12/09/2016] [Indexed: 12/19/2022] Open
Abstract
90Sr is one of the radionuclides released after nuclear accidents that can significantly impact human health in the long term. 90Sr accumulates mostly in the bones of exposed populations. Previous research has shown that exposure induces changes in bone physiology both in humans and in mice. We hypothesize that, due to its close location with bone marrow stromal cells (BMSCs), 90Sr could induce functional damage to stromal cells that may explain these biological effects due to chronic exposure to 90Sr. The aim of this work was to verify this hypothesis through the use of an in vitro model of MS5 stromal cell lines exposed to 1 and 10 kBq.mL-1 of 90Sr. Results indicated that a 30-minute exposure to 90Sr induced double strand breaks in DNA, followed by DNA repair, senescence and differentiation. After 7 days of exposure, MS5 cells showed a decreased ability to proliferate, changes in cytokine expression, and changes in their ability to support hematopoietic progenitor proliferation and differentiation. These results demonstrate that chronic exposure to a low concentration of 90Sr can induce functional changes in BMSCs that in turn may explain the health effects observed in following chronic 90Sr exposure.
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Geyer AM, Schwarz BC, Hobbs RF, Sgouros G, Bolch WE. Quantitative impact of changes in marrow cellularity, skeletal size, and bone mineral density on active marrow dosimetry based upon a reference model. Med Phys 2017; 44:272-283. [PMID: 28102950 DOI: 10.1002/mp.12002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/14/2016] [Accepted: 10/30/2016] [Indexed: 11/10/2022] Open
Abstract
PURPOSE The hematopoietically active tissues of skeletal bone marrow are a prime target for computational dosimetry given potential risks of leukemia and, at higher dose levels, acute marrow toxicity. The complex three-dimensional geometry of trabecular spongiosa, however, complicates schema for dose assessment in such a way that only a few reference skeletal models have been developed to date, and which are based upon microimaging of a limited number of cadaveric bone spongiosa cores. The question then arises as to what degree of accuracy is achievable from reference skeletal dose models when applied to individual patients or specific exposed populations? METHODS Patient variability in marrow dosimetry were quantified for three skeletal sites - the ribs, lumbar vertebrae, and cranium - for the beta-emitters 45 Ca, 153 Sm, and 90 Y, and the alpha-particle emitters 223 Ra, 219 Rn, and 215 Po, the latter two being the immediate progeny of the former. For each radionuclide and bone site, three patient parameters were altered from their values in the reference model: (1) bone size as a surrogate for patient stature, (2) marrow cellularity as a surrogate for age- or disease-related changes in marrow adiposity, and (3) the trabecular bone volume fraction as a surrogate for bone mineral density. Marrow dose variability is expressed as percent differences in the radionuclide S value given by the reference model and the patient-parameterized model. The impact of radionuclide biokinetics on marrow dosimetry was not considered. RESULTS Variations in overall bone size play a very minor role in active marrow dose variability. Marrow cellularity is a significant factor in dose variability for active marrow self-irradiation, but it plays no role for radionuclides localized to the trabecular bone matrix. Variations in trabecular bone volume fractions impact the active marrow dose variability for short-range particle emitters 45 Ca, 223 Ra, 219 Rn, and 215 Po in the vertebrae and ribs, skeletal sites with small spongiosa proportions of trabecular bone. In the cranium, with its relative high proportion of trabecular bone, significant differences in marrow dosimetry from the reference model were noted for all radionuclides. CONCLUSIONS Skeletal models of active marrow dosimetry should be more fully parameterized to permit closer matching to patient bone density and marrow cellularity, particularly when considering short-range particle emitters localized to either the bone trabeculae or active marrow, respectively.
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Affiliation(s)
- Amy M Geyer
- J Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611-6131, USA
| | - Bryan C Schwarz
- J Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611-6131, USA
| | - Robert F Hobbs
- Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - George Sgouros
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - Wesley E Bolch
- J Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611-6131, USA
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Schüz J, Deltour I, Krestinina LY, Tsareva YV, Tolstykh EI, Sokolnikov ME, Akleyev AV. In utero exposure to radiation and haematological malignancies: pooled analysis of Southern Urals cohorts. Br J Cancer 2017; 116:126-133. [PMID: 27855443 PMCID: PMC5220143 DOI: 10.1038/bjc.2016.373] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 09/26/2016] [Accepted: 10/17/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It is scientifically uncertain whether in utero exposure to low-dose ionising radiation increases the lifetime risk of haematological malignancies. METHODS We pooled two cohorts from the Southern Urals comprising offspring of female workers of a large nuclear facility (the Mayak Production Association) and of women living in areas along the Techa River contaminated by nuclear accidents/waste from the same facility, with detailed dosimetry. RESULTS The combined cohort totalled 19 536 subjects with 700 504 person-years at risk over the period of incidence follow-up, and slightly more over the period of mortality follow-up, yielding 58 incident cases and 36 deaths up to age 61 years. Risk was increased in subjects who received in utero doses of ⩾80 mGy (excess relative risk (ERR): 1.27; 95% confidence interval (CI): -0.20 to 4.71), and the risk increased consistently per 100 mGy of continuous exposure in utero (ERR: 0.77; CI: 0.02 to 2.56). No association was apparent in mortality-based analyses. Results for leukaemia and lymphoma were similar. A very weak positive association was observed between incidence and postnatal exposure. CONCLUSIONS In summary, the results suggest a positive association between in utero exposure to ionising radiation and risk of haematological malignancies, but the small number of outcomes and inconsistent incidence and mortality findings preclude firm conclusions.
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Affiliation(s)
- Joachim Schüz
- International Agency for Research on Cancer (IARC), Section of Environment and Radiation, Lyon, France
| | - Isabelle Deltour
- International Agency for Research on Cancer (IARC), Section of Environment and Radiation, Lyon, France
| | | | - Yulia V Tsareva
- Southern Urals Biophysics Institute, Ozyorsk, Russian Federation
| | - Evgenia I Tolstykh
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russian Federation
| | | | - Alexander V Akleyev
- Urals Research Center for Radiation Medicine, Chelyabinsk, Russian Federation
- Chelyabinsk State University, Chelyabinsk, Russian Federation
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Harbron R. What do recent epidemiological studies tell us about the risk of cancer from radiation doses typical of diagnostic radiography? Radiography (Lond) 2016. [DOI: 10.1016/j.radi.2016.08.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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50
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Verbiest T, Finnon R, Brown N, Finnon P, Bouffler S, Badie C. NOD Scid Gamma Mice Are Permissive to Allogeneic HSC Transplantation without Prior Conditioning. Int J Mol Sci 2016; 17:E1850. [PMID: 27827995 PMCID: PMC5133850 DOI: 10.3390/ijms17111850] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 10/14/2016] [Accepted: 11/02/2016] [Indexed: 11/16/2022] Open
Abstract
Scid hematopoietic stem cells (HSCs) have an intrinsic defect in their maintenance within the bone marrow (BM) niche which facilitates HSC transplantation without the absolute requirement of prior conditioning. Nevertheless, NOD scid mice have a significantly altered life span due to early development of thymic lymphomas, which compromises the ability to study the long-term fate of exogenous HSCs and their progeny. Here, we present data on the transplantation of HSCs into NOD scid gamma (NSG) mice to achieve long-term engraftment without prior conditioning. We transplanted allogeneic HSCs constitutively expressing the mCherry fluorescent marker into age-matched NSG mice and assessed donor chimerism 6 months post-transplantation. All transplanted NSG mice showed long-term myeloid and lymphoid cell chimerism. Also, in vivo irradiated HSCs showed long-term engraftment, although overall white blood cell (WBC) donor chimerism was lower compared with non-irradiated HSCs. Using this novel NSG transplantation model, we will be able to study the effects of low dose in vivo X-ray exposure on the long-term fate of HSCs, without the requirement of prior radio-ablation of the recipient, and thus leaving the recipient's BM microenvironment uncompromised. In conclusion, we demonstrated for the first time that allogeneic HSCs from a different inbred strain can compete for niches in the BM compartment of NSG mice.
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Affiliation(s)
- Tom Verbiest
- Cancer Mechanisms and Biomarkers Group, Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK.
- CRUK & MRC Oxford Institute for Radiation Oncology, Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK.
| | - Rosemary Finnon
- Cancer Mechanisms and Biomarkers Group, Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK.
| | - Natalie Brown
- Cancer Mechanisms and Biomarkers Group, Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK.
| | - Paul Finnon
- Cancer Mechanisms and Biomarkers Group, Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK.
| | - Simon Bouffler
- Cancer Mechanisms and Biomarkers Group, Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK.
| | - Christophe Badie
- Cancer Mechanisms and Biomarkers Group, Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 ORQ, UK.
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