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Deevband MR, Mohammadi H, Salimi Y, Mostaar A, Deravi N, Fathi M, Vakili K, Yaghoobpoor S, Ghorbani M, Divband A, Tavakoli M. Introducing fitting models for estimating age-specific dose and effective dose in paediatric patients undergoing head, chest and abdomen-pelvis imaging protocols: a patient study. J Med Radiat Sci 2024; 71:251-260. [PMID: 38454637 PMCID: PMC11177019 DOI: 10.1002/jmrs.772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 02/03/2024] [Indexed: 03/09/2024] Open
Abstract
INTRODUCTION Concerns regarding the adverse consequences of radiation have increased due to the expanded application of computed tomography (CT) in medical practice. Certain studies have indicated that the radiation dosage depends on the anatomical region, the imaging technique employed and patient-specific variables. The aim of this study is to present fitting models for the estimation of age-specific dose estimates (ASDE), in the same direction of size-specific dose estimates, and effective doses based on patient age, gender and the type of CT examination used in paediatric head, chest and abdomen-pelvis imaging. METHODS A total of 583 paediatric patients were included in the study. Radiometric data were gathered from DICOM files. The patients were categorised into five distinct groups (under 15 years of age), and the effective dose, organ dose and ASDE were computed for the CT examinations involving the head, chest and abdomen-pelvis. Finally, the best fitting models were presented for estimation of ASDE and effective doses based on patient age, gender and the type of examination. RESULTS The ASDE in head, chest, and abdomen-pelvis CT examinations increases with increasing age. As age increases, the effective dose in head and abdomen-pelvis CT scans decreased. However, for chest scans, the effective dose initially showed a decreasing trend until the first year of life; after that, it increases in correlation with age. CONCLUSIONS Based on the presented fitting model for the ASDE, these CT scan quantities depend on factors such as patient age and the type of CT examination. For the effective dose, the gender was also included in the fitting model. By utilising the information about the scan type, region and age, it becomes feasible to estimate the ASDE and effective dose using the models provided in this study.
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Affiliation(s)
- Mohammad Reza Deevband
- Department of Medical Physics and Biomedical Engineering, Faculty of MedicineShahid Beheshti University of Medical Sciences and Health ServicesTehranIran
| | - Habib Mohammadi
- Department of Medical Physics and Biomedical Engineering, Faculty of MedicineShahid Beheshti University of Medical Sciences and Health ServicesTehranIran
| | - Yazdan Salimi
- Department of Medical Physics and Biomedical Engineering, Faculty of MedicineShahid Beheshti University of Medical Sciences and Health ServicesTehranIran
| | - Ahmad Mostaar
- Department of Medical Physics and Biomedical Engineering, Faculty of MedicineShahid Beheshti University of Medical Sciences and Health ServicesTehranIran
| | - Niloofar Deravi
- Faculty of MedicineShahid Beheshti University of Medical SciencesTehranIran
| | - Mobina Fathi
- Faculty of MedicineShahid Beheshti University of Medical SciencesTehranIran
| | - Kimia Vakili
- Faculty of MedicineShahid Beheshti University of Medical SciencesTehranIran
| | - Shirin Yaghoobpoor
- Faculty of MedicineShahid Beheshti University of Medical SciencesTehranIran
| | - Mehdi Ghorbani
- Department of Medical Physics and Biomedical Engineering, Faculty of MedicineShahid Beheshti University of Medical Sciences and Health ServicesTehranIran
| | - Abolhasan Divband
- Department of Pediatrics, Faculty of MedicineCollege/Hormozgan University of Medical ScienceBandar AbbasIran
| | - Meysam Tavakoli
- Department of Radiation Oncology, Winship Cancer InstituteEmory UniversityAtlantaGeorgiaUSA
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Rey N, Ebrahimian T, Gloaguen C, Kereselidze D, Christelle E, Brizais C, Bachelot F, Riazi G, Monceau V, Demarquay C, Zineddine IG, Klokov D, Lehoux S, Ebrahimian TG. Low to moderate dose 137Cs (γ) radiation promotes M2 type macrophage skewing and reduces atherosclerotic plaque CD68+ cell content in ApoE (-/-) mice. Sci Rep 2024; 14:12450. [PMID: 38816571 PMCID: PMC11139881 DOI: 10.1038/s41598-024-63084-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 05/24/2024] [Indexed: 06/01/2024] Open
Abstract
The effects of low doses of ionizing radiation on atherosclerosis remain uncertain, particularly as regards the generation of pro- or anti-inflammatory responses, and the time scale at which such effects can occur following irradiation. To explore these phenomena, we exposed atheroprone ApoE(-/-) mice to a single dose of 0, 0.05, 0.5 or 1 Gy of 137Cs (γ) administered at a 10.35 mGy min-1 dose rate and evaluated short-term (1-10 days) and long-term consequences (100 days). Bone marrow-derived macrophages were derived from mice 1 day after exposure. Irradiation was associated with a significant skewing of M0 and M2 polarized macrophages towards the M2 phenotype, as demonstrated by an increased mRNA expression of Retnla, Arg1, and Chil3 in cells from mice exposed to 0.5 or 1 Gy compared with non-irradiated animals. Minimal effects were noted in M1 cells or M1 marker mRNA. Concurrently, we observed a reduced secretion of IL-1β but enhanced IL-10 release from M0 and M2 macrophages. Effects of irradiation on circulating monocytes were most marked at day 10 post-exposure, when the 1 Gy dose was associated with enhanced numbers of both Ly6CHigh and Ly6Low cells. By day 100, levels of circulating monocytes in irradiated and non-irradiated mice were equivalent, but anti-inflammatory Ly6CLow monocytes were significantly increased in the spleen of mice exposed to 0.05 or 1 Gy. Long term exposures did not affect atherosclerotic plaque size or lipid content, as determined by Oil red O staining, whatever the dose applied. Similarly, irradiation did not affect atherosclerotic plaque collagen or smooth muscle cell content. However, we found that lesion CD68+ cell content tended to decrease with rising doses of radioactivity exposure, culminating in a significant reduction of plaque macrophage content at 1 Gy. Taken together, our results show that short- and long-term exposures to low to moderate doses of ionizing radiation drive an anti-inflammatory response, skewing bone marrow-derived macrophages towards an IL-10-secreting M2 phenotype and decreasing plaque macrophage content. These results suggest a low-grade athero-protective effect of low and moderate doses of ionizing radiation.
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Affiliation(s)
- N Rey
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - T Ebrahimian
- Department of Medicine, Lady Davis Institute for Biomedical Research, McGill University, Montreal, Canada
| | - C Gloaguen
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - D Kereselidze
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - E Christelle
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - C Brizais
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - F Bachelot
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - G Riazi
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - V Monceau
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - C Demarquay
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - I Garali Zineddine
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - D Klokov
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France
| | - S Lehoux
- Department of Medicine, Lady Davis Institute for Biomedical Research, McGill University, Montreal, Canada.
| | - Teni G Ebrahimian
- Institut de Radioprotection et de Sûreté Nucléaire, Laboratoire de Radiotoxicologie et de Radiobiologie Expérimentale, 92262, Fontenay-Aux Roses, France.
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Łysek-Gładysińska M, Wieczorek A, Walaszczyk A, Jelonek K, Pietrowska M, Widłak P, Kulik R, Gabryś D. Late Effects of Ionizing Radiation on the Ultrastructure of Hepatocytes and Activity of Lysosomal Enzymes in Mouse Liver Irradiated In Vivo. Metabolites 2024; 14:212. [PMID: 38668340 PMCID: PMC11051989 DOI: 10.3390/metabo14040212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 03/29/2024] [Accepted: 04/07/2024] [Indexed: 04/28/2024] Open
Abstract
The study aimed to investigate late radiation-induced changes in the histology, ultrastructure, and activity of lysosomal enzymes in mouse liver exposed to ionizing radiation. The experiment was conducted on C57BL/6J male mice whose distal part of the liver was exposed occasionally to single doses of radiation (6 MV photons) during targeted heart irradiation; estimated doses delivered to analyzed tissue were 0.025 Gy, 0.25 Gy, 1 Gy, and 2 Gy. Tissues were collected 40 weeks after irradiation. We have observed that late effects of radiation have an adaptive nature and their intensity was dose-dependent. Morphological changes in hepatocytes included an increased number of primary lysosomes and autophagic vacuoles, which were visible in tissues irradiated with 0.25 Gy and higher doses. On the other hand, a significant increase in the activity of lysosomal hydrolases was observed only in tissues exposed to 2 Gy. The etiology of these changes may be multifactorial and result, among others, from unintentional irradiation of the distal part of the liver and/or functional interaction of the liver with an irradiated heart. In conclusion, we confirmed the presence of late dose-dependent ultrastructural and biochemical changes in mouse hepatocytes after liver irradiation in vivo.
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Affiliation(s)
| | - Anna Wieczorek
- Division of Medical Biology, Institute of Biology, Jan Kochanowski University, 25-406 Kielce, Poland;
| | - Anna Walaszczyk
- Freeman Hospital, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE7 7DN, UK;
| | - Karol Jelonek
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie National Research Institute of Oncology Gliwice Branch, 44-102 Gliwice, Poland; (K.J.); (M.P.)
| | - Monika Pietrowska
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie National Research Institute of Oncology Gliwice Branch, 44-102 Gliwice, Poland; (K.J.); (M.P.)
| | - Piotr Widłak
- 2nd Department of Radiology, Medical University of Gdańsk, 80-210 Gdańsk, Poland;
| | - Roland Kulik
- Department of Radiotherapy Planning, Maria Sklodowska-Curie National Research Institute of Oncology Gliwice Branch, 44-102 Gliwice, Poland;
| | - Dorota Gabryś
- Department of Radiotherapy, Maria Sklodowska-Curie National Research Institute of Oncology Gliwice Branch, 44-102 Gliwice, Poland;
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Chaurasia RK, Sapra BK, Aswal DK. Interplay of immune modulation, adaptive response and hormesis: Suggestive of threshold for clinical manifestation of effects of ionizing radiation at low doses? THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170178. [PMID: 38280586 DOI: 10.1016/j.scitotenv.2024.170178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 12/26/2023] [Accepted: 01/13/2024] [Indexed: 01/29/2024]
Abstract
The health impacts of low-dose ionizing radiation exposures have been a subject of debate over the last three to four decades. While there has been enough evidence of "no adverse observable" health effects at low doses and low dose rates, the hypothesis of "Linear No Threshold" continues to rule and govern the principles of radiation protection and the formulation of regulations and public policies. In adopting this conservative approach, the role of the biological processes underway in the human body is kept at abeyance. This review consolidates the available studies that discuss all related biological pathways and repair mechanisms that inhibit the progression of deleterious effects at low doses and low dose rates of ionizing radiation. It is pertinent that, taking cognizance of these processes, there is a need to have a relook at policies of radiation protection, which as of now are too stringent, leading to undue economic losses and negative public perception about radiation.
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Affiliation(s)
- R K Chaurasia
- Radiological Physics and Advisory Division, India; Health, Safety and Environment Group,Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
| | - B K Sapra
- Radiological Physics and Advisory Division, India; Health, Safety and Environment Group,Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
| | - D K Aswal
- Health, Safety and Environment Group,Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
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Zhao L, Li Z, Huang B, Mi D, Xu D, Sun Y. Integrating evolutionarily conserved mechanism of response to radiation for exploring novel Caenorhabditis elegans radiation-responsive genes for estimation of radiation dose associated with spaceflight. CHEMOSPHERE 2024; 351:141148. [PMID: 38211791 DOI: 10.1016/j.chemosphere.2024.141148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/09/2023] [Accepted: 01/06/2024] [Indexed: 01/13/2024]
Abstract
During space exploration, space radiation is widely recognized as an inescapable perilous stressor, owing to its capacity to induce genomic DNA damage and escalate the likelihood of detrimental health outcomes. Rapid and reliable estimation of space radiation dose holds paramount significance in accurately assessing the health risks associated with spaceflight. However, the identification of space radiation-responsive genes, with their potential to serve as early indicators for diagnosing radiation dose associated with spaceflight, continues to pose a significant challenge. In this study, based on the evolutionarily conserved mechanism of radiation response, an in silico analysis method of homologous comparison was performed to identify the Caenorhabditis elegans orthologues of human radiation-responsive genes with possible roles in the major processes of response to radiation, and thereby to explore the potential C. elegans radiation-responsive genes for evaluating the levels of space radiation exposure. The results showed that there were 60 known C. elegans radiation-responsive genes and 211 C. elegans orthologues of human radiation-responsive genes implicated in the major processes of response to radiation. Through an investigation of all available transcriptomic datasets obtained from space-flown C. elegans, it was observed that the expression levels of the majority of these putative C. elegans radiation-responsive genes identified in this study were notably changed across various spaceflight conditions. Furthermore, this study indicated that within the identified genes, 19 known C. elegans radiation-responsive genes and 40 newly identified C. elegans orthologues of human radiation-responsive genes exhibited a remarkable positive correlation with the duration of spaceflight. Moreover, a noteworthy presence of substantial multi-collinearity among the majority of these identified genes was observed. This observation lends support to the possibility of treating each identified gene as an independent indicator of radiation dose in space. Ultimately, a subset of 15 potential radiation-responsive genes was identified, presenting the most promising indicators for estimation of radiation dose associated with spaceflight in C. elegans.
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Affiliation(s)
- Lei Zhao
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, Liaoning, China.
| | - Zejun Li
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, Liaoning, China
| | - Baohang Huang
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, Liaoning, China
| | - Dong Mi
- College of Science, Dalian Maritime University, Dalian, 116026, Liaoning, China
| | - Dan Xu
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, Liaoning, China
| | - Yeqing Sun
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, Liaoning, China.
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Bhinder J, O'Brien-Irr M, Chang M, Montross B, Khan S, Dosluoglu H, Harris L. Comparison of success and cost after retrieval of two inferior vena cava filters. J Vasc Surg Venous Lymphat Disord 2024; 12:101687. [PMID: 37708934 DOI: 10.1016/j.jvsv.2023.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/01/2023] [Accepted: 09/07/2023] [Indexed: 09/16/2023]
Abstract
OBJECTIVE The objective of this study was to help guide inferior vena cava (IVC) filter choices by better understanding the retrieval characteristics, complications, and total costs between two commonly used IVC filters. METHODS All patients who underwent retrieval or attempted retrieval of Denali (Bard Peripheral Vascular) or Option (Argon Medical Devices) IVC filters were identified between March 2016 and October 2021 at a single tertiary care center. Those with imaging studies that permitted evaluation of filter placement, presence or degree of tilt, and/or hooking of the filter into the IVC wall were included in the present study. Filter retrieval success, number of attempts, use of advanced techniques, and fluoroscopy and procedural times were recorded and compared between the two filters. RESULTS A total of 87 patients presented for retrieval of 52 Denali and 35 Option Elite filters during the study period. Denali filters were more likely to be successfully retrieved at the first attempt (94% vs 77%; P = .019). The procedural and fluoroscopy times were shorter for Denali filters (29 minutes vs 63 minutes [P < .001] and 7 minutes vs 25 minutes [P < .001], respectively). Denali filters were less likely to be significantly tilted (≥15○) at retrieval (12% vs 29%; P < .001) or to have the filter hook embedded in the IVC wall (6% vs 40%; P < .001). Tilting of the filter of ≥15○ had no significant effects on the retrieval success rate (no tilt or tilt <15○ vs tilt of ≥15○: 98% vs 100%; P = .58). In contrast, filter hook penetration into the IVC wall significantly reduced successful recovery (41% vs 99%; P < .001). CONCLUSIONS The findings from this study suggest that although the filter designs are similar, a benefit exists in the ease of retrievability of the Denali over the Option filter. We found that tilting and hooking of the filter in the IVC wall occurred significantly more with the Option filter. These factors likely made retrieval more difficult and contributed to the longer procedure and fluoroscopy times.
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Affiliation(s)
- Jasmine Bhinder
- Department of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY.
| | - Monica O'Brien-Irr
- Department of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Matthew Chang
- Department of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Brittany Montross
- Department of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Sikandar Khan
- Department of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Hasan Dosluoglu
- Department of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Linda Harris
- Department of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
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Thariat J, Little MP, Zablotska LB, Samson P, O’Banion MK, Leuraud K, Bergom C, Girault G, Azimzadeh O, Bouffler S, Hamada N. Radiotherapy for non-cancer diseases: benefits and long-term risks. Int J Radiat Biol 2024; 100:505-526. [PMID: 38180039 PMCID: PMC11039429 DOI: 10.1080/09553002.2023.2295966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/29/2023] [Indexed: 01/06/2024]
Abstract
PURPOSE The discovery of X-rays was followed by a variety of attempts to treat infectious diseases and various other non-cancer diseases with ionizing radiation, in addition to cancer. There has been a recent resurgence of interest in the use of such radiotherapy for non-cancer diseases. Non-cancer diseases for which use of radiotherapy has currently been proposed include refractory ventricular tachycardia, neurodegenerative diseases (e.g. Alzheimer's disease and dementia), and Coronavirus Disease 2019 (COVID-19) pneumonia, all with ongoing clinical studies that deliver radiation doses of 0.5-25 Gy in a single fraction or in multiple daily fractions. In addition to such non-cancer effects, historical indications predominantly used in some countries (e.g. Germany) include osteoarthritis and degenerative diseases of the bones and joints. This narrative review gives an overview of the biological rationale and ongoing preclinical and clinical studies for radiotherapy proposed for various non-cancer diseases, discusses the plausibility of the proposed biological rationale, and considers the long-term radiation risks of cancer and non-cancer diseases. CONCLUSIONS A growing body of evidence has suggested that radiation represents a double-edged sword, not only for cancer, but also for non-cancer diseases. At present, clinical evidence has shown some beneficial effects of radiotherapy for ventricular tachycardia, but there is little or no such evidence of radiotherapy for other newly proposed non-cancer diseases (e.g. Alzheimer's disease, COVID-19 pneumonia). Patients with ventricular tachycardia and COVID-19 pneumonia have thus far been treated with radiotherapy when they are an urgent life threat with no efficient alternative treatment, but some survivors may encounter a paradoxical situation where patients were rescued by radiotherapy but then get harmed by radiotherapy. Further studies are needed to justify the clinical use of radiotherapy for non-cancer diseases, and optimize dose to diseased tissue while minimizing dose to healthy tissue.
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Affiliation(s)
- Juliette Thariat
- Department of Radiation Oncology, Comprehensive Cancer Centre François Baclesse, Caen, France
- Laboratoire de Physique Corpusculaire IN2P3, ENSICAEN/CNRS UMR 6534, Normandie Université, Caen, France
| | - Mark P. Little
- Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland, USA
| | - Lydia B. Zablotska
- Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco (UCSF), San Francisco, California, USA
| | - Pamela Samson
- Department of Radiation Oncology, Alvin J. Siteman Cancer Center, Washington University School of Medicine, St. Louis, Missouri, USA
| | - M. Kerry O’Banion
- Department of Neuroscience, Del Monte Institute for Neuroscience, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Klervi Leuraud
- Research Department on Biological and Health Effects of Ionizing Radiation (SESANE), Institute for Radiological Protection and Nuclear Safety (IRSN), Fontenay-aux-Roses, France
| | - Carmen Bergom
- Department of Radiation Oncology, Alvin J. Siteman Cancer Center, Washington University School of Medicine, St. Louis, Missouri, USA
- Cardio-Oncology Center of Excellence, Washington University, St. Louis, Missouri, USA
| | - Gilles Girault
- Comprehensive Cancer Centre François Baclesse, Medical Library, Caen, France
| | - Omid Azimzadeh
- Federal Office for Radiation Protection (BfS), Section Radiation Biology, Neuherberg, Germany
| | - Simon Bouffler
- Radiation Protection Sciences Division, UK Health Security Agency (UKHSA), Chilton, Didcot, UK
| | - Nobuyuki Hamada
- Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Abiko, Chiba, Japan
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Iavicoli I, Fontana L, Santocono C, Guarino D, Laudiero M, Calabrese EJ. The challenges of defining hormesis in epidemiological studies: The case of radiation hormesis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 902:166030. [PMID: 37544458 DOI: 10.1016/j.scitotenv.2023.166030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/24/2023] [Accepted: 08/01/2023] [Indexed: 08/08/2023]
Abstract
In the current radiation protection system, preventive measures and occupational exposure limits for controlling occupational exposure to ionizing radiation are based on the linear no-threshold extrapolation model. However, currently an increasing body of evidence indicates that this paradigm predicts very poorly biological responses in the low-dose exposure region. In addition, several in vitro and in vivo studies demonstrated the presence of hormetic dose response curves correlated to ionizing radiation low exposure. In this regard, it is noteworthy that also the findings of different epidemiological studies, conducted in different categories of occupationally exposed workers (e.g., healthcare, nuclear industrial and aircrew workers), observed lower rates of mortality and/or morbidity from cancer and/or other diseases in exposed workers than in unexposed ones or in the general population, then suggesting the possible occurrence of hormesis. Nevertheless, these results should be considered with caution since the identification of hormetic response in epidemiological studies is rather challenging because of a number of major limitations. In this regard, some of the most remarkable shortcomings found in epidemiological studies performed in workers exposed to ionizing radiation are represented by lack or inadequate definition of exposure doses, use of surrogates of exposure, narrow dose ranges, lack of proper control groups and poor evaluation of confounding factors. Therefore, considering the valuable role and contribution that epidemiological studies might provide to the complex risk assessment and management process, there is a clear and urgent need to overcome the aforementioned limits in order to achieve an adequate, useful and more real-life risk assessment that should also include the key concept of hormesis. Thus, in the present conceptual article we also discuss and provide possible approaches to improve the capacity of epidemiological studies to identify/define the hormetic response and consequently improve the complex process of risk assessment of ionizing radiation at low exposure doses.
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Affiliation(s)
- Ivo Iavicoli
- Department of Public Health, Section of Occupational Medicine, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy.
| | - Luca Fontana
- Department of Public Health, Section of Occupational Medicine, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
| | - Carolina Santocono
- Department of Public Health, Section of Occupational Medicine, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
| | - Davide Guarino
- Department of Public Health, Section of Occupational Medicine, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
| | - Martina Laudiero
- Department of Public Health, Section of Occupational Medicine, University of Naples Federico II, Via S. Pansini 5, 80131 Naples, Italy
| | - Edward J Calabrese
- Department of Environmental Health Sciences, Morrill I, N344, University of Massachusetts, Amherst, MA 01003, USA
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Bondy SC. The Hormesis Concept: Strengths and Shortcomings. Biomolecules 2023; 13:1512. [PMID: 37892194 PMCID: PMC10604602 DOI: 10.3390/biom13101512] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/29/2023] Open
Abstract
Hormesis implies that the effects of various materials or conditions that organisms are exposed to, may not have linear dose-response characteristics but rather, can be biphasic. Thus the response to a low dose of a stressor may be the opposite to that occurring at higher doses. Such a dual response is postulated for many toxicants and physical conditions and may involve a beneficial adaptive response. Such a non-linear effect is undoubtedly present in many useful pharmacological and nutraceutical agents with can be toxic at high concentrations. This somewhat divisive topic is an area of study that should be objectively studied and not clouded by political and policy considerations. The objective of this review is to examine claims concerning those exposures where hormesis seems to exist and also those where there is no good supporting evidence. The breadth of this phenomenon and potential mechanisms underlying hormetic events are discussed together with their limitations.
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Affiliation(s)
- Stephen C. Bondy
- Center for Occupational and Environmental Health, Department of Environmental & Occupational Health, University of California, Irvine, CA 92697, USA;
- Department of Medicine, University of California, Irvine, CA 92697, USA
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10
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Rahu K, Rahu M, Auvinen A, Zeeb H, Boice JD. Cancer incidence among Chernobyl cleanup workers from Estonia: A 34-year follow-up. Int J Cancer 2023; 153:1347-1355. [PMID: 37334866 DOI: 10.1002/ijc.34633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 05/15/2023] [Accepted: 05/31/2023] [Indexed: 06/21/2023]
Abstract
From 1986 to 1991, 4831 men from Estonia were sent to clean up radioactively contaminated areas near Chernobyl (Chornobyl). Their cancer incidence during 1986 to 2019 was compared to that of the male population of Estonia. The cohort of cleanup workers was linked to national population and cancer registers based on unique personal identification numbers. Nineteen (0.4%) workers could not be traced. A total of 4812 men contributing 120 770 person-years of follow-up were eligible for the analyses. Standardized incidence ratios (SIR) and adjusted relative risks (ARR, expressed as ratios of SIRs) with 95% confidence intervals (CI) were calculated. A total of 687 incident cancer cases were registered in the cohort (SIR 1.11, 95% CI 1.03-1.19). Presumptive radiation-related cancers combined were in excess, but not when smoking- and alcohol-related cancers were excluded (SIR 0.92, 95% CI 0.71-1.18). For smoking-related cancers, the SIR was 1.24 (95% CI 1.13-1.36) and for alcohol-related cancer the SIR was 1.53 (95% CI 1.31-1.75). Less educated workers had a higher risk of all cancers (ARR = 1.21, 95% CI 1.02-1.44) and smoking-related cancers (ARR = 1.42, 95% CI 1.14-1.76). An elevated risk of alcohol-related cancers was evident 15 to 24 years (vs <15 years) after return from the Chernobyl area. This updated register-based follow-up of Chernobyl cleanup workers from Estonia revealed an excess of radiation-related cancer sites combined, but the excess was not apparent after excluding cancers associated with smoking and alcohol.
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Affiliation(s)
- Kaja Rahu
- Department of Registries, National Institute for Health Development, Tallinn, Estonia
| | - Mati Rahu
- Formerly: Department of Epidemiology and Biostatistics, National Institute for Health Development, Tallinn, Estonia
| | - Anssi Auvinen
- Faculty of Social Sciences, Tampere University, Tampere, Finland
- Environmental Radiation Surveillance, Radiation and Nuclear Safety Authority-STUK, Vantaa, Finland
| | - Hajo Zeeb
- Department of Prevention and Evaluation, Leibniz Institute for Prevention Research and Epidemiology-BIPS, Bremen, Germany
- Faculty of Health Sciences, University of Bremen, Bremen, Germany
| | - John D Boice
- National Council on Radiation Protection and Measurements, Bethesda, Maryland, USA
- Division of Epidemiology, School of Medicine, Vanderbilt University, Nashville, Tennessee, USA
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11
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Wang KY, Lee CS, Vempati P, Sharma R, Kohn N, Seetharamu N. Characteristics of Patients With Second Primary Lung Cancer Following Breast Cancer: A Retrospective Descriptive Study. Clin Lung Cancer 2023; 24:e198-e204. [PMID: 37268494 DOI: 10.1016/j.cllc.2023.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 04/08/2023] [Accepted: 04/13/2023] [Indexed: 06/04/2023]
Abstract
BACKGROUND Breast cancer (BC) is the most common noncutaneous malignancy in women and survivors are at an increased risk for secondary malignancy with lung cancer (LC) being the most common. There are few studies that have explored the clinicopathological specifics of LC in BC survivors. METHODS In this single-institution, retrospective study, we identified BC survivors who subsequently developed LC, examined their breast and LC clinical and pathological characteristics and compared them to the general BC and LC population as published in the literature. RESULTS In our study, we found the following associations that could be meaningful: an association between receiving radiation (RT) and LC (including a statistically significant P = .03 chance of ipsilateral LC after BC treatment with RT), a higher incidence and amount of smoking and LC, high BRCA positivity (78.9%) in the few patients who had germline testing, and a higher incidence of EGFR mutations in NSCLC after BC (60.9%) as well as an earlier stage of NSCLC disease. CONCLUSION Treatments such as RT, genetic factors such as BRCA mutations, and tobacco use may increase the risk of developing LC amongst BC survivors. Exploring this further can potentially lead to better risk stratification through modified low-dose CT chest screening protocols to catch LCs earlier and ultimately improve outcomes. Past studies have shown that BC survivors who are subsequently diagnosed with NSCLC may have improved OS compared with primary NSCLC and our study showed a high incidence of EGFR mutated NSCLC, which also suggest both improved prognosis and a different molecular profile of NSCLC, which warrants further investigation. Lastly, BC survivors who subsequently are diagnosed with NSCLC had earlier stage disease in our study, perhaps a result of surveillance, highlighting the importance of close monitoring of BC survivors.
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Affiliation(s)
- Kevin Yu Wang
- Northwell Health/Zucker School of Medicine, Hofstra/Northwell, Manhasset, NY.
| | - Chung-Shien Lee
- Northwell Health/Zucker School of Medicine, Hofstra/Northwell, Manhasset, NY
| | - Prashant Vempati
- Northwell Health/Zucker School of Medicine, Hofstra/Northwell, Manhasset, NY
| | - Rajiv Sharma
- Northwell Health/Zucker School of Medicine, Hofstra/Northwell, Manhasset, NY
| | - Nina Kohn
- Northwell Health/Zucker School of Medicine, Hofstra/Northwell, Manhasset, NY
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12
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He X, Cai L, Tang H, Chen W, Hu W. Epigenetic modifications in radiation-induced non-targeted effects and their clinical significance. Biochim Biophys Acta Gen Subj 2023; 1867:130386. [PMID: 37230420 DOI: 10.1016/j.bbagen.2023.130386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/19/2023] [Accepted: 05/19/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND Ionizing radiation (IR) plays an important role in the diagnosis and treatment of cancer. Besides the targeted effects, the non-targeted effects, which cause damage to non-irradiated cells and genomic instability in normal tissues, also play a role in the side effects of radiotherapy and have been shown to involve both alterations in DNA sequence and regulation of epigenetic modifications. SCOPE OF REVIEW We summarize the recent findings regarding epigenetic modifications that are involved in radiation-induced non-targeted effects as well as their clinical significance in radiotherapy and radioprotection. MAJOR CONCLUSIONS Epigenetic modifications play an important role in both the realization and modulation of radiobiological effects. However, the molecular mechanisms underlying non-targeted effects still need to be clarified. GENERAL SIGNIFICANCE A better understanding of the epigenetic mechanisms related to radiation-induced non-targeted effects will guide both individualized clinical radiotherapy and individualized precise radioprotection.
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Affiliation(s)
- Xiangyang He
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Luwei Cai
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Haoyi Tang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Weibo Chen
- Nuclear and Radiation Incident Medical Emergency Office, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China.
| | - Wentao Hu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China.
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13
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Cherif J, Raddaoui A, Trabelsi M, Souissi N. Diagnostic low-dose X-ray radiation induces fluoroquinolone resistance in pathogenic bacteria. Int J Radiat Biol 2023; 99:1971-1977. [PMID: 37436698 DOI: 10.1080/09553002.2023.2232016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 06/27/2023] [Indexed: 07/13/2023]
Abstract
PURPOSE The crisis of antibiotic resistance has been attributed to the overuse or misuse of these medications. However, exposure of bacteria to physical stresses such as X-ray radiation, can also lead to the development of resistance to antibiotics. The present study aimed to investigate the effect of exposure to diagnostic low-dose X-ray radiation on the bacterial response to antibiotics in two pathogenic bacteria, including the Gram-positive Staphylococcus aureus and Gram-negative Salmonella enteritidis. METHODS The bacterial strains were exposed to diagnostic X-ray doses of 5 and 10 mGy, which are equivalent to the doses delivered to patients during conventional radiography X-ray examinations in accordance with the European guidelines on quality criteria for diagnostic radiographic images. Following exposure to X-ray radiation, the samples were used to estimate bacterial growth dynamics and perform antibiotic susceptibility tests. RESULTS The results indicate that exposure to diagnostic low-dose X-ray radiation increased the number of viable bacterial colonies of both Staphylococcus aureus and Salmonella enteritidis and caused a significant change in bacterial susceptibility to antibiotics. For instance, in Staphylococcus aureus, the diameter of the inhibition zones for marbofloxacin decreased from 29.66 mm before irradiation to 7 mm after irradiation. A significant decrease in the inhibition zone was also observed for penicillin. In the case of Salmonella enteritidis, the diameter of the inhibition zone for marbofloxacin was 29 mm in unexposed bacteria but decreased to 15.66 mm after exposure to 10 mGy of X-ray radiation. Furthermore, a significant decrease in the inhibition zone was detected for amoxicillin and amoxicillin/clavulanic acid (AMC). CONCLUSION It is concluded that exposure to diagnostic X-ray radiation can significantly alter bacterial susceptibility to antibiotics. This irradiation decreased the effectiveness of fluoroquinolone and β-lactam antibiotics. Specifically, low-dose X-rays made Staphylococcus aureus resistant to marbofloxacin and increased its resistance to penicillin. Similarly, Salmonella Enteritidis became resistant to both marbofloxacin and enrofloxacin, and showed reduced sensitivity to amoxicillin and AMC.
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Affiliation(s)
- Jaouhra Cherif
- Laboratory of Biophysics and Medical Technologies, Higher Institute of Medical Technologies of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Anis Raddaoui
- Laboratory Ward, National Bone Marrow Transplant Center, University of Tunis El Manar, Tunis, Tunisia
| | - Meriam Trabelsi
- Higher Institute of Medical Technologies of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Nada Souissi
- Bacteriology Laboratory, Tunisian Institute of Veterinary Research, University of Tunis El Manar, Tunis, Tunisia
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14
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Basse C, Ancel J, Massiani MA, Bonté PE, Beaulaton C, Beaucaire-Danel S, Milder M, Cao K, Daniel C, Du Rusquec P, Sablin MP, Kirova Y, Sage E, Beddok A, Girard N. Accelerated subsequent lung cancer after post-operative radiotherapy for breast cancer. Lung Cancer 2023; 182:107295. [PMID: 37442059 DOI: 10.1016/j.lungcan.2023.107295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 06/20/2023] [Accepted: 07/08/2023] [Indexed: 07/15/2023]
Abstract
BACKGROUND Post-operative whole breast radiotherapy for breast cancer (BC) may increase the risk of subsequent lung cancer (LC). The impact of radiotherapy intensification (boost) has not been specifically explored in this context. We investigated the role of radiation modalities on the development of subsequent LC among our patients treated by radiotherapy for localized BC. METHODS All patients with a diagnosis of LC between 2000 and 2020 with a history of prior localized BC treated by surgery and post-operative radiotherapy were retrospectively reviewed. Primary endpoint was time to first diagnosis of LC after BC treatment with radiotherapy (RT). RESULTS From 98 patients who developed subsequent LC after primary BC treated with post-operative RT, 38% of patients (n = 37) received an additional RT boost, and 46% (n = 45) received hormonal treatment post radiation. A total of 61% (n = 60) were smokers. With regards to LC characteristics, adenocarcinoma was the most frequent histology (68%, n = 66); 36% (n = 35) harbored at least 1 molecular alteration, 57% (n = 20) of them being amenable to targeted therapy. Median time to first diagnosis of LC was 6 years [1.7-28.4 yrs] in the whole cohort. In the subgroup of patients treated with boost this time was reduced to 4 years [1.8-20.8 years] compared to 8 years for patients without boost [1.7-28.4 yrs] (p = 0.007). Boost, smoking usage, endocrine therapy, and age <50 yrs old at BC radiation remained independent factors associated with shorter time to first diagnosis of LC after BC treatment. DISCUSSION We report for the first time the potential impact of boost -part of BC radiation treatment- for BC on the risk of subsequent LC. The impact of low dose radiation on lung parenchyma could explain this phenomenon, but the underlying physiopathology is still under investigation. This work highlights the need for clinicians to identify patients at risk of developing faster subsequent thoracic malignancy after BC radiation, for implementing personalized surveillance.
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Affiliation(s)
- Clémence Basse
- Thoracic Oncology, Institut Curie, Paris-St Cloud, France; University of Versailles Saint Quentin, Faculté de médecine Simone-Veil, Paris Saclay University, Versailles, France
| | | | | | | | | | | | - Maud Milder
- Data Department, Institut Curie, Paris, France
| | - Kim Cao
- Radiation Department, Institut Curie, Paris, France
| | | | | | | | | | - Edouard Sage
- University of Versailles Saint Quentin, Faculté de médecine Simone-Veil, Paris Saclay University, Versailles, France; Thoracic Surgery Department, Hôpital Foch, Suresnes, France
| | | | - Nicolas Girard
- Thoracic Oncology, Institut Curie, Paris-St Cloud, France; University of Versailles Saint Quentin, Faculté de médecine Simone-Veil, Paris Saclay University, Versailles, France.
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15
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Sproull M, Wilson E, Miller R, Camphausen K. The Future of Radioactive Medicine. Radiat Res 2023; 200:80-91. [PMID: 37141143 PMCID: PMC10466314 DOI: 10.1667/rade-23-00031.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 04/07/2023] [Indexed: 05/05/2023]
Abstract
The discovery of X rays in the late 19th century heralded the beginning of a new age in medicine, and the advent of channeling the power of radiation to diagnose and treat human disease. Radiation has been leveraged in medicine in a multitude of ways and is a critical element of cancer care including screening, diagnosis, surveillance, and interventional treatments. Modern radiotherapy techniques include a multitude of methodologies utilizing both externally and internally delivered radiation from a variety of approaches. This review provides a comprehensive overview of contemporary radiotherapy methodologies, the field of radiopharmaceuticals and theranostics, effects of low dose radiation and highlights the phenomena of fear of exposure to radiation and its impact in modern medicine.
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Affiliation(s)
- M. Sproull
- Radiation Oncology Branch, National Cancer Institute, Bethesda, Maryland
| | - E. Wilson
- Radiation Oncology Branch, National Cancer Institute, Bethesda, Maryland
| | - R.W. Miller
- Radiation Oncology Branch, National Cancer Institute, Bethesda, Maryland
| | - K. Camphausen
- Radiation Oncology Branch, National Cancer Institute, Bethesda, Maryland
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16
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Hashim JH, Hashim Z, Hod R, Jalaludin J, Mohamed N, Karuppannan S, Mazeli AR, Sahrani S, Zulkaflli ZA. A priority list of environmental health issues for Malaysia. REVIEWS ON ENVIRONMENTAL HEALTH 2023; 38:349-359. [PMID: 35468665 DOI: 10.1515/reveh-2022-0030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 03/28/2022] [Indexed: 06/02/2023]
Abstract
OBJECTIVES Environmental risk factors contribute to 24% of the global burden of disease from all causes in disability-adjusted life years (DALYs), and to 23% of all global deaths. Malaysia being an advanced developing country, there is a need to prioritise environmental health issues to enable environmental health practitioners to focus on the most significant and urgent environmental health concerns. CONTENT This project was undertaken by a Thematic Working Group on Environmental Health Experts (TWG 10) under the Malaysian National Environmental Health Action Plan. Sixteen pre-selected environmental health issues were presented to a two focus group discussions among 20 environmental health and related professionals who then scored each issue on its magnitude and severity scale. SUMMARY The total of these scores generated a list of priority environmental health issues for Malaysia. Children environmental health came out as the environmental health issue of the highest priority. OUTLOOK We hope that this list of priority environmental health issues will be used for prioritising academic and professional manpower training, research funding allocation and planning for intervention programmes by various stakeholders.
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Affiliation(s)
- Jamal Hisham Hashim
- Department of Environmental Health and Occupational Safety, Universiti Selangor, Shah Alam Campus, Shah Alam, Selangor, Malaysia
| | - Zailina Hashim
- Department of Environmental and Occupational Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Rozita Hod
- Department of Community Health, National University of Malaysia, Kuala Lumpur, Malaysia
| | - Juliana Jalaludin
- Department of Environmental and Occupational Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Norlen Mohamed
- Disease Control Division, Ministry of Health Malaysia, Putrajaya, Malaysia
| | - Subramaniam Karuppannan
- Environmental Management and Research Association of Malaysia, Petaling Jaya, Selangor, Malaysia
| | - Ahmad Riadz Mazeli
- Disease Control Division, Ministry of Health Malaysia, Putrajaya, Malaysia
| | - Suhaily Sahrani
- Engineering Services Division, Ministry of Health Malaysia, Putrajaya, Malaysia
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17
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Mohammed R, Ahmed FK, Abdulrahman AF, Hamad SM, Ahmed SM, Barzinjy AA, Almessiere MA. Impact of Growth Temperature of Lead-Oxide Nanostructures on the Attenuation of Gamma Radiation. ACS OMEGA 2023; 8:22230-22237. [PMID: 37360485 PMCID: PMC10286296 DOI: 10.1021/acsomega.3c02910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 05/26/2023] [Indexed: 06/28/2023]
Abstract
Chemical bath deposition (CBD) technique is utilized to grow lead-oxide (PbO) nanostructures (NSs) over PbO seed fabricated by physical vapor deposition (PVD) method on glass substrates. The effect of growth temperatures 50 and 70 °C on the surface topography, optical properties, and crystal structure of lead-oxide NSs has been studied. The investigated results suggested that the growth temperature has a huge and very considerable influence on the PbO NS, and the fabricated PbO NS has been indexed as the Pb3O4 polycrystalline tetragonal phase. The crystal size for PbO thin films grown at 50 °C was 85.688 nm and increased to 96.61 nm once the growth temperature reached 70 °C. The fabricated PbO nanofilms show a high rate of transmittance, which are ∼70 and 75% in the visible spectrum for the films deposited at 50 and 70 °C, respectively. The obtained Eg was in the range of 2.099-2.288 eV. Also, the linear attenuation coefficient values of gamma-rays for shielding the Cs-137 radioactive source increased at 50 °C. The transmission factor, mean free path, and half-value layer are reduced at a higher attenuation coefficient of PbO grown at 50 °C. This study evaluates the relationship between synthesized lead-oxide NSs and the radiation energy attenuation of gamma-rays. This study provided a suitable, novel, and flexible protective shield of clothes or an apron made of lead or lead oxide to protect against ionizing radiation that meets safety rules and protects medical workers from ionizing radiation.
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Affiliation(s)
- Raghad
Y. Mohammed
- Department
of Physics, College of Science, University
of Duhok, 42001 Duhok, Kurdistan Region, Iraq
| | - Furman Kasseem Ahmed
- Physiotherapy
Department, Hawler Medical University/College
of Health Science, 44001 Erbil, Kurdistan Region, Iraq
| | - Ahmed Fattah Abdulrahman
- Department
of Physics, Faculty of Science, University
of Zakho, 42002 Zakho, Kurdistan Region, Iraq
- Department
of Computer and Communications Engineering, College of Engineering, Nawroz University, 42001 Duhok, Kurdistan Region, Iraq
| | | | - Sabah M. Ahmed
- Department
of Physics, College of Science, University
of Duhok, 42001 Duhok, Kurdistan Region, Iraq
| | | | - Munirah Abdullah Almessiere
- Department
of Physics, College of Science, Imam Abdulrahman
Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
- Department
of Biophysics, Institute for Research and Medical Consultation (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi
Arabia
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18
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Oyefeso FA, Goldberg G, Opoku NYPS, Vazquez M, Bertucci A, Chen Z, Wang C, Muotri AR, Pecaut MJ. Effects of acute low-moderate dose ionizing radiation to human brain organoids. PLoS One 2023; 18:e0282958. [PMID: 37256873 PMCID: PMC10231836 DOI: 10.1371/journal.pone.0282958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 02/27/2023] [Indexed: 06/02/2023] Open
Abstract
Human exposure to low-to-moderate dose ionizing radiation (LMD-IR) is increasing via environmental, medical, occupational sources. Acute exposure to LMD-IR can cause subclinical damage to cells, resulting in altered gene expression and cellular function within the human brain. It has been difficult to identify diagnostic and predictive biomarkers of exposure using traditional research models due to factors including lack of 3D structure in monolayer cell cultures, limited ability of animal models to accurately predict human responses, and technical limitations of studying functional human brain tissue. To address this gap, we generated brain/cerebral organoids from human induced pluripotent stem cells to study the radiosensitivity of human brain cells, including neurons, astrocytes, and oligodendrocytes. While organoids have become popular models for studying brain physiology and pathology, there is little evidence to confirm that exposing brain organoids to LMD-IR will recapitulate previous in vitro and in vivo observations. We hypothesized that exposing brain organoids to proton radiation would (1) cause a time- and dose-dependent increase in DNA damage, (2) induce cell type-specific differences in radiosensitivity, and (3) increase expression of oxidative stress and DNA damage response genes. Organoids were exposed to 0.5 or 2 Gy of 250 MeV protons and samples were collected at 30 minute, 24 hour, and 48 hour timepoints. Using immunofluorescence and RNA sequencing, we found time- and dose-dependent increases in DNA damage in irradiated organoids; no changes in cell populations for neurons, oligodendrocytes, and astrocytes by 24 hours; decreased expression of genes related to oligodendrocyte lineage, astrocyte lineage, mitochondrial function, and cell cycle progression by 48 hours; increased expression of genes related to neuron lineage, oxidative stress, and DNA damage checkpoint regulation by 48 hours. Our findings demonstrate the possibility of using organoids to characterize cell-specific radiosensitivity and early radiation-induced gene expression changes within the human brain, providing new avenues for further study of the mechanisms underlying acute neural cell responses to IR exposure at low-to-moderate doses.
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Affiliation(s)
- Foluwasomi A. Oyefeso
- Department of Biomedical Engineering Sciences, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Gabriela Goldberg
- Department of Pediatrics, School of Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Nana Yaa P. S. Opoku
- Department of Biomedical Engineering Sciences, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Marcelo Vazquez
- Departments of Pediatrics and Cellular & Molecular Medicine, School of Medicine, Center for Academic Research and Training in Anthropogeny (CARTA), Kavli Institute for Brain and Mind, Archealization Center (ArchC), University of California San Diego, La Jolla, California, United States of America
- Center for Genomics, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Antonella Bertucci
- Center for Genomics, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Zhong Chen
- Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Charles Wang
- Departments of Pediatrics and Cellular & Molecular Medicine, School of Medicine, Center for Academic Research and Training in Anthropogeny (CARTA), Kavli Institute for Brain and Mind, Archealization Center (ArchC), University of California San Diego, La Jolla, California, United States of America
- Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Alysson R. Muotri
- Department of Radiation Medicine, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
| | - Michael J. Pecaut
- Department of Biomedical Engineering Sciences, School of Medicine, Loma Linda University, Loma Linda, California, United States of America
- Departments of Pediatrics and Cellular & Molecular Medicine, School of Medicine, Center for Academic Research and Training in Anthropogeny (CARTA), Kavli Institute for Brain and Mind, Archealization Center (ArchC), University of California San Diego, La Jolla, California, United States of America
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19
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Jain V, Saini D, Soren DC, Kumar VA, Vivek Kumar PR, Koya PKM, Jaikrishan G, Das B. Non-linear dose response of DNA double strand breaks in response to chronic low dose radiation in individuals from high level natural radiation areas of Kerala coast. Genes Environ 2023; 45:16. [PMID: 37127760 PMCID: PMC10150514 DOI: 10.1186/s41021-023-00273-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023] Open
Abstract
BACKGROUND The human population living in high level natural radiation areas (HLNRAs) of Kerala coast provide unique opportunities to study the biological effects of low dose and low dose rate ionizing radiation below 100 mGy. The level of radiation in this area varies from < 1.0 to 45 mGy/year. The areas with ≤ 1.50 mGy/year are considered as normal level natural radiation areas (NLNRA) and > 1.50 mGy/year, as high level natural radiation areas (HLNRA). The present study evaluated dose response relationship between DNA double strand breaks (DSBs) and background radiation dose in individuals residing in Kerala coast. Venous blood samples were collected from 200 individuals belonging to NLNRA (n = 50) and four dose groups of HLNRA; 1.51-5.0 mGy/year (n = 50), 5.01-10.0 mGy/year (n = 30), 10.01-15.0 mGy/year (n = 33), > 15.0 mGy/year (n = 37) with written informed consent. The mean dose of NLNRA and four HLNRA dose groups studied are 1.21 ± 0.21 (range: 0.57-1.49), 3.02 ± 0.95 (range: 1.57-4.93), 7.43 ± 1.48 (range: 5.01-9.75), 12.22 ± 1.47 (range: 10.21-14.99), 21.64 ± 6.28 (range: 15.26-39.88) mGy/year, respectively. DNA DSBs were quantified using γH2AX as a marker, where foci were counted per cell using fluorescence microscopy. RESULTS Our results revealed that the frequency of γH2AX foci per cell was 0.090 ± 0.051 and 0.096 ± 0.051, respectively in NLNRA and HLNRA individuals, which were not significantly different (t198 = 0.33; P = 0.739). The frequency of γH2AX foci was observed to be 0.090 ± 0.051, 0.096 ± 0.051, 0.076 ± 0.036, 0.087 ± 0.042, 0.108 ± 0.046 per cell, respectively in different dose groups of ≤ 1.50, 1.51-5.0, 5.01-10.0, 10.01-15.0, > 15.0mGy/year (ANOVA, F4,195 = 2.18, P = 0.072) and suggested non-linearity in dose response. The frequency of γH2AX foci was observed to be 0.098 ± 0.042, 0.078 ± 0.037, 0.084 ± 0.042, 0.099 ± 0.058, 0.097 ± 0.06 and 0.114 ± 0.033 per cell in the age groups of ≤ 29, 30-34, 35-39, 40-44, 45-49 and ≥ 50 years, respectively (ANOVA, F5,194 = 2.17, P = 0.059), which suggested marginal influence of age on the baseline of DSBs. Personal habits such as smoking (No v/s Yes: 0.092 ± 0.047 v/s 0.093 ± 0.048, t198 = 0.13; P = 0.895) and drinking alcohol (No v/s Yes: 0.096 ± 0.052 v/s 0.091 ± 0.045, t198 = 0.62; P = 0.538) did not show any influence on DSBs in the population. CONCLUSION The present study did not show any increase in DSBs in different dose groups of HLNRA compared to NLNRA, however, it suggested a non-linear dose response between DNA DSBs and chronic low dose radiation.
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Affiliation(s)
- Vinay Jain
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
- Homi Bhabha National Institute (HBNI), Anushakti Nagar, Trombay, Mumbai, 400 094, India
| | - Divyalakshmi Saini
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
| | - D C Soren
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
| | - V Anil Kumar
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
| | - P R Vivek Kumar
- Low Level Radiation Research Laboratory, LLRRS, RB&HSD, BSG, BARC, IRE Campus, Beach Road, Kollam, Kerala, 691 001, India
- Homi Bhabha National Institute (HBNI), Anushakti Nagar, Trombay, Mumbai, 400 094, India
| | - P K M Koya
- Low Level Radiation Research Laboratory, LLRRS, RB&HSD, BSG, BARC, IRE Campus, Beach Road, Kollam, Kerala, 691 001, India
| | - G Jaikrishan
- Low Level Radiation Research Laboratory, LLRRS, RB&HSD, BSG, BARC, IRE Campus, Beach Road, Kollam, Kerala, 691 001, India
| | - Birajalaxmi Das
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India.
- Homi Bhabha National Institute (HBNI), Anushakti Nagar, Trombay, Mumbai, 400 094, India.
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20
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Karam HM, Galal SM, Lotfy DM. Nrf2 and NF-қB interplay in tamoxifen-induced hepatic toxicity: A promising therapeutic approach of sildenafil and low-dose γ radiation. ENVIRONMENTAL TOXICOLOGY 2023; 38:990-996. [PMID: 36715126 DOI: 10.1002/tox.23742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 12/13/2022] [Accepted: 01/07/2023] [Indexed: 06/18/2023]
Abstract
Tamoxifen-induced hepatotoxicity is an inevitable side effect during breast cancer treatment. Low-dose gamma irradiation (IRR) shows many beneficial effects by stimulating various biological processes. This study evaluates the possible effect of sildenafil and low-dose gamma radiation on liver damages as new treatment strategies. Group I (control), group II: (tamoxifen), group III: (tamoxifen + Sildenafil), group IV: (tamoxifen+ irradiation) and group V: (tamoxifen +Sildenafil + irradiation). Rats were sacrificed after 5 h from tamoxifen injection. Results showed that tamoxifen caused elevation in serum AST, ALT and ALP as well hepatic ROS, iNOS, MDA, Keap-1 and NF-Kb, in addition to diminution in hepatic Nrf2 and HO-1. Exposure to low-dose gamma radiation and sildenafil amended the alterations in the measured parameters in serum and tissue. Moreover, all results were confirmed by histopathological examination. In conclusion, sildenafil and low-dose gamma radiation can mitigate the toxicity induced by tamoxifen in liver tissues. Hence, this treatment could be further evaluated as a new approach for alleviating various liver disorders.
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Affiliation(s)
- Heba M Karam
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Shereen M Galal
- Health Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Dina M Lotfy
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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21
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Elsaman S, Elsonbaty SM, Moawed FSM, Hegazy MGA. Evaluation of Brown Micro-Algae Synergies With Low Dose γ-Radiation Against Chronic Hepatitis Induced by D-Galactosamine in Rats. Dose Response 2023; 21:15593258231169405. [PMID: 37077716 PMCID: PMC10107994 DOI: 10.1177/15593258231169405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 03/27/2023] [Indexed: 04/21/2023] Open
Abstract
Introduction Hepatic inflammation is considered key driver of hepatic tissue impairment.We aimed to explore the interaction of Halamphora coffeaeformis (Amph.) with low dose ionizing γ radiation (γR) exposure against D-galactosamine (D-GaIN)-induced chronic hepatitis in Albino rats. Methods Chronic hepatitis was induced with single dose of D-GalN (400 mg/kg BW i.p.). Rats received 400 mg Amph/kg BW daily by gastric gavage concomitant with .25 Gy γ-R. Liver oxidative stress and inflammatory status were assessed. Gene expression levels of signal transducer and activator of transcription 3 (STAT3) and nuclear factor kappa B (NFKB) were estimated by q-PCR. D-Galactosamine injection significantly encouraged hepatic oxidative damage and inflammatory disturbance accompanied with improved intercellular adhesion molecule-1 level (ICAM-1). Results messenger RNA gene expression levels of STAT3 and NF-kB were expressively higher in D-GaIN-treated animals. Histopathological examination supported results. Interestingly, Amph treatment with γ-radiation (γ-R) subjection displayed significant improvement of oxidative and inflammatory status along with controlled signaling molecular factors which was supported by amended histological structure of induced liver hepatitis. Conclusion Results conclude the efficacious control of liver hepatitis progression by dual collaboration of Amph. with low dose γ-R via control of vital growth signaling factors linked with inflammation thru anti-inflammation, antioxidative and anti-proliferative activities.
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Affiliation(s)
- Salma Elsaman
- Department of Biochemistry, Faculty
of Science, Ain Shams University, Cairo, Egypt
| | - Sawsan M. Elsonbaty
- Department of Microbiology, Health
Radiation Research, National Center for Radiation
Research and Technology, Cairo, Egypt
| | - Fatma S. M. Moawed
- Department of Radiation Biology, Egyptian Atomic Energy
Authority, Cairo, Egypt
| | - Marwa G. A. Hegazy
- Department of Biochemistry, Faculty
of Science, Ain Shams University, Cairo, Egypt
- Marwa G. A. Hegazy, Department of
Biochemistry, Faculty of Science, Ain Shams University, Abassia, Cairo 11566,
Egypt.
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22
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Andre F, Seitz S, Fortner P, Allmendinger T, Sommer A, Brado M, Sokiranski R, Fink J, Kauczor HU, Heussel CP, Herth F, Frey N, Görich J, Buss SJ. Simultaneous assessment of heart and lungs with gated high-pitch ultra-low dose chest CT using artificial intelligence-based calcium scoring. Eur J Radiol Open 2023; 10:100481. [PMID: 36852255 PMCID: PMC9958356 DOI: 10.1016/j.ejro.2023.100481] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/10/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
Purpose The combined testing for coronary artery and pulmonary diseases is of clinical interest as risk factors are shared. In this study, a novel ECG-gated tin-filtered ultra-low dose chest CT protocol (GCCT) for integrated heart and lung acquisition and the applicability of artificial intelligence (AI)-based coronary artery calcium scoring were assessed. Methods In a clinical registry of 10481 patients undergoing heart and lung CT, GCCT was applied in 44 patients on a dual-source CT. Coronary calcium scans (CCS) with 120 kVp, 100 kVp, and tin-filtered 100 kVp (Sn100) of controls, matched with regard to age, sex, and body-mass index, were retrieved from the registry (ntotal=176, 66.5 (59.4-74.0) years, 52 men). Automatic tube current modulation was used in all scans. In 20 patients undergoing GCCT and Sn100 CCS, Agatston scores were measured both semi-automatically by experts and by AI, and classified into six groups (0, <10, <100, <400, <1000, ≥1000). Results Effective dose decreased significantly from 120 kVp CCS (0.50 (0.41-0.61) mSv) to 100 kVp CCS (0.34 (0.26-0.37) mSv) to Sn100 CCS (0.14 (0.11-0.17) mSv). GCCT showed higher values (0.28 (0.21-0.32) mSv) than Sn100 CCS but lower than 120 kVp and 100 kVp CCS (all p < 0.05) despite greater scan length. Agatston scores correlated strongly between GCCT and Sn100 CCS in semi-automatic and AI-based measurements (both ρ = 0.98, p < 0.001) resulting in high agreement in Agatston score classification (κ = 0.97, 95% CI 0.92-1.00; κ = 0.89, 95% CI 0.79-0.99). Regarding chest findings, further diagnostic steps were recommended in 28 patients. Conclusions GCCT allows for reliable coronary artery disease and lung cancer screening with ultra-low radiation exposure. GCCT-derived Agatston score shows excellent agreement with standard CCS, resulting in equivalent risk stratification.
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Affiliation(s)
- Florian Andre
- University of Heidelberg, Department of Cardiology, Angiology and Pneumology, Heidelberg, Germany
- MVZ-DRZ Heidelberg, Heidelberg, Germany
- Correspondence to: University of Heidelberg, Department of Cardiology, Angiology and Pneumology, Im Neuenheimer Feld 410, Heidelberg 69120, Germany.
| | | | | | | | | | | | | | | | - Hans-Ulrich Kauczor
- University of Heidelberg, Department of Diagnostic and Interventional Radiology, Heidelberg
| | - Claus P. Heussel
- University of Heidelberg, Thoraxklinik, Department of Diagnostic and Interventional Radiology with Nuclear Medicine, Heidelberg, Germany
- Translational Lung Research Centre Heidelberg, Member of the German Centre for Lung Research (DZL), Heidelberg, Germany
| | - Felix Herth
- University of Heidelberg, Thoraxklinik, Department of Pneumology and Critical Care Medicine, Heidelberg, Germany
- Translational Lung Research Centre Heidelberg, Member of the German Centre for Lung Research (DZL), Heidelberg, Germany
| | - Norbert Frey
- University of Heidelberg, Department of Cardiology, Angiology and Pneumology, Heidelberg, Germany
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23
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Little MP, Zhang W, van Dusen R, Hamada N, Bugden M, Cao M, Thomas K, Li D, Wang Y, Chandrashekhar M, Khan MK, Coleman CN. Low-dose radiotherapy for COVID-19 pneumonia and cancer: summary of a recent symposium and future perspectives. Int J Radiat Biol 2023; 99:357-371. [PMID: 35511152 DOI: 10.1080/09553002.2022.2074165] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The lessons learned from the Coronavirus Disease 2019 (COVID-19) pandemic are numerous. Low dose radiotherapy (LDRT) was used in the pre-antibiotic era as treatment for bacterially/virally associated pneumonia. Motivated in part by these historic clinical and radiobiological data, LDRT for treatment of COVID-19-associated pneumonia was proposed in early 2020. Although there is a large body of epidemiological and experimental data pointing to effects such as cancer at low doses, there is some evidence of beneficial health effects at low doses. It has been hypothesized that low dose radiation could be combined with immune checkpoint therapy to treat cancer. We shall review here some of these old radiobiological and epidemiological data, as well as the newer data on low dose radiation and stimulated immune response and other relevant emerging data. The paper includes a summary of several oral presentations given in a Symposium on "Low dose RT for COVID and other inflammatory diseases" as part of the 67th Annual Meeting of the Radiation Research Society, held virtually 3-6 October 2021.
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Affiliation(s)
- Mark P Little
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
| | - Wei Zhang
- Radiation Effects Department, UK Health Security Agency (UKHSA), Chilton, UK
| | - Roy van Dusen
- Information Management Services, Silver Spring, MD, USA
| | - Nobuyuki Hamada
- Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Komae, Japan
| | - Michelle Bugden
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Meiyun Cao
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Kiersten Thomas
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Deyang Li
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Yi Wang
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada.,Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - Megha Chandrashekhar
- Radiobiology and Health Branch, Canadian Nuclear Laboratories, Chalk River, Canada
| | - Mohammad K Khan
- Department of Radiation Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, USA
| | - C Norman Coleman
- Radiation Research Program, Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, DHHS, Rockville, MD, USA
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24
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Low-dose ionizing radiation and adverse birth outcomes: a systematic review and meta-analysis. Int Arch Occup Environ Health 2023; 96:77-92. [PMID: 35913560 PMCID: PMC9823032 DOI: 10.1007/s00420-022-01911-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/05/2022] [Indexed: 01/11/2023]
Abstract
OBJECTIVE Ionizing radiation is a human carcinogen, and there is evidence that exposure to low-dose ionizing radiation increases the risk of adverse birth outcomes. METHODS We undertook a systematic review and meta-analysis to synthesize the research of maternal and paternal exposure to low-dose radiation on low birth weight, miscarriage, pre-term delivery, and stillbirth. Our literature search used four databases (PubMed, Environmental Index, GeoBASE, and the Cumulative Index to Nursing and Allied Health Literature). We included study populations exposed to occupational and medical sources of radiation, nuclear disasters, and those living near nuclear power plants. We considered papers published between January 1st, 1990, and June 30th, 2021. The quality of the studies was assessed, and we performed meta-analysis using random effects models to generate summary measures of association. Forest plots were created to assess the heterogeneity in these measures, and funnel plots were used to assess publication bias. RESULTS Overall, 26 studies were identified, and these yielded measures of association from 10, 11, and 8 studies for low birth weight, miscarriage, and stillbirth outcomes, respectively. It was not possible to perform meta-analyses for pre-term delivery due to a small number of studies. The meta-analysis summary relative risk (RR) of having a low-birth-weight infant among those ever exposed to radiation relative to those unexposed, after adjusting for publication bias, was 1.29 (95% CI 0.97-1.73). The corresponding risk estimates for miscarriage and stillbirth were 1.15 (95% CI 1.02-1.30), and 1.19 (95% CI 0.98-1.45), respectively. CONCLUSIONS Our findings suggest that ionizing radiation increases the risk of adverse birth outcomes. Future work should strive to provide data needed to better understand the shape of the exposure-response curve.
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25
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Abozaid OAR, Rashed LA, El-Sonbaty SM, Abu-Elftouh AI, Ahmed ESA. Mesenchymal Stem Cells and Selenium Nanoparticles Synergize with Low Dose of Gamma Radiation to Suppress Mammary Gland Carcinogenesis via Regulation of Tumor Microenvironment. Biol Trace Elem Res 2023; 201:338-352. [PMID: 35138531 PMCID: PMC9823077 DOI: 10.1007/s12011-022-03146-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 02/01/2022] [Indexed: 01/11/2023]
Abstract
Breast cancer is one of the most prevalent and deadliest cancers among women in the world because of its aggressive behavior and inadequate response to conventional therapies. Mesenchymal stem cells (MSCs) combined with green nanomaterials could be an efficient tool in cell cancer therapy. This study examined the curative effects of bone marrow-derived mesenchymal stem cells (BM-MSCs) with selenium nanoparticles (SeNPs) coated with fermented soymilk and a low dose of gamma radiation (LDR) in DMBA-induced mammary gland carcinoma in female rats. DMBA-induced mammary gland carcinoma as marked by an elevation of mRNA level of cancer promoter genes (Serpin and MIF, LOX-1, and COL1A1) and serum level of VEGF, TNF-α, TGF-β, CA15-3, and caspase-3 with the reduction in mRNA level of suppressor gene (FST and ADRP). These deleterious effects were hampered after treatment with BM-MSCs (1 × 106 cells/rat) once and daily administration of SeNPs (20 mg/kg body weight) and exposure once to (0.25 Gy) LDR. Finally, MSCs, SeNPs, and LDR notably modulated the expression of multiple tumor promoters and suppressor genes playing a role in breast cancer induction and suppression.
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Affiliation(s)
- Omayma A. R. Abozaid
- Biochemistry Department, Faculty of Veterinary Medicine, Benha University, Banha, Egypt
| | - Laila A. Rashed
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Sawsan M. El-Sonbaty
- Radiation Microbiology Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | | | - Esraa S. A. Ahmed
- Radiation Biology Research Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Nasr City, Cairo, 11787 Egypt
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26
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Xhuti D, Rebalka IA, Minhas M, May L, Murphy K, Nederveen JP, Tarnopolsky MA. The Acute Effect of Multi-Ingredient Antioxidant Supplementation following Ionizing Radiation. Nutrients 2023; 15:nu15010207. [PMID: 36615864 PMCID: PMC9823556 DOI: 10.3390/nu15010207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 01/04/2023] Open
Abstract
Radiation exposure is an undeniable health threat encountered in various occupations and procedures. High energy waves in ionizing radiation cause DNA damage and induce reactive oxygen species (ROS) production, which further exacerbate DNA, protein, and lipid damage, increasing risk of mutations. Although endogenous antioxidants such as superoxide dismutase have evolved to upregulate and neutralize ROS, exogenous dietary antioxidants also have the potential to combat ionizing radiation (IR)-induced ROS production. We evaluated a cocktail of ingredients (AOX) purported to have antioxidant and mitochondrial protective properties on the acute effects of IR. We show that IR stimulates DNA damage through phosphorylation of DNA repair proteins in the heart, brain, and liver of mice. AOX showed partial protection in brain and liver, through a lack of significant activation in given repair proteins. In addition, AOX attenuated the IR-induced increase in NF-kβ mRNA and protein expression in brain and liver. Lastly, cytochrome c oxidase complex transcripts were significantly higher in heart and brain following radiation, which was also diminished by prior ingestion of AOX. Together, our findings suggest that a multi-ingredient AOX supplement may attenuate the IR-induced cellular damage response and represents a feasible and cost-effective preventative supplement for at-risk populations of radiation exposure.
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Affiliation(s)
- Donald Xhuti
- Department of Pediatrics, McMaster University Health Sciences Centre, Hamilton, ON L8N 3Z5, Canada
- Exerkine Corporation, McMaster University Medical Centre (MUMC), Hamilton, ON L8N 3Z5, Canada
| | - Irena A. Rebalka
- Exerkine Corporation, McMaster University Medical Centre (MUMC), Hamilton, ON L8N 3Z5, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Mahek Minhas
- Exerkine Corporation, McMaster University Medical Centre (MUMC), Hamilton, ON L8N 3Z5, Canada
| | - Linda May
- Department of Kinesiology, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Kieran Murphy
- Department of Medical Imaging, University of Toronto, Toronto, ON M5S 2C5, Canada
- Cora Therapeutics, Toronto, ON M5K 1N2, Canada
| | - Joshua P. Nederveen
- Department of Pediatrics, McMaster University Health Sciences Centre, Hamilton, ON L8N 3Z5, Canada
| | - Mark A. Tarnopolsky
- Department of Pediatrics, McMaster University Health Sciences Centre, Hamilton, ON L8N 3Z5, Canada
- Exerkine Corporation, McMaster University Medical Centre (MUMC), Hamilton, ON L8N 3Z5, Canada
- Correspondence: ; Tel.: +1-905-521-2100 (ext. 76593); Fax: +1-905-577-8380
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27
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Factors to Consider for the Correct Use of γH2AX in the Evaluation of DNA Double-Strand Breaks Damage Caused by Ionizing Radiation. Cancers (Basel) 2022; 14:cancers14246204. [PMID: 36551689 PMCID: PMC9776434 DOI: 10.3390/cancers14246204] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/07/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
People exposed to ionizing radiation (IR) both for diagnostic and therapeutic purposes is constantly increasing. Since the use of IR involves a risk of harmful effects, such as the DNA DSB induction, an accurate determination of this induced DNA damage and a correct evaluation of the risk-benefit ratio in the clinical field are of key relevance. γH2AX (the phosphorylated form of the histone variant H2AX) is a very early marker of DSBs that can be induced both in physiological conditions, such as in the absence of specific external agents, and by external factors such as smoking, heat, background environmental radiation, and drugs. All these internal and external conditions result in a basal level of γH2AX which must be considered for the correct assessment of the DSBs after IR exposure. In this review we analyze the most common conditions that induce H2AX phosphorylation, including specific exogenous stimuli, cellular states, basic environmental factors, and lifestyles. Moreover, we discuss the most widely used methods for γH2AX determination and describe the principal applications of γH2AX scoring, paying particular attention to clinical studies. This knowledge will help us optimize the use of available methods in order to discern the specific γH2AX following IR-induced DSBs from the basal level of γH2AX in the cells.
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28
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Okonkwo UC, Ohagwu CC, Aronu ME, Okafor CE, Idumah CI, Okokpujie IP, Chukwu NN, Chukwunyelu CE. Ionizing radiation protection and the linear No-threshold controversy: Extent of support or counter to the prevailing paradigm. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2022; 253-254:106984. [PMID: 36057228 DOI: 10.1016/j.jenvrad.2022.106984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 08/07/2022] [Indexed: 06/15/2023]
Abstract
This study has developed a relationship that categorized radiation protection and allows for a proper, clear, and concise review of the different classifications in terms of principles of protection, dose criteria, categories, fundamental tools, exposure situations, applications and control measures. With the groundwork laid, advances of the linear no-threshold (LNT) model which has attracted attention in the field of radiobiology and epidemiology were examined in detail. Various plausible dose-response relationship scenarios were x-rayed under low-dose extrapolation. Intensive review of factors opposing the LNT model involving radiophobia (including misdiagnosis, alternative surgery/imaging, suppression of ionizing radiation (IR) research); radiobiology (including DNA damage repair, apoptosis/necrosis, senescence protection) and cost issues (including-high operating cost of LNT, incorrect prioritization, exaggeration of LNT impact, risk-to-benefit analysis) were performed. On the other hand, factors supporting the use of LNT were equally examined, they include regulatory bodies' endorsement, insufficient statistical significance, partial DNA repair, variability of irradiated bodies, different latency periods for cancer, dynamic nature of threshold and conflicting interests. After considering the gaps in the scientific investigations that either support or counter the scientific paradigm on the use of LNT model, further research and advocacy is recommended that will ultimately lead to the acceptance of an alternative paradigm by the international regulators.
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Affiliation(s)
- Ugochukwu C Okonkwo
- Department of Mechanical Engineering, Nnamdi Azikiwe University, Awka, Nigeria.
| | - Christopher C Ohagwu
- Department of Radiography and Radiological Sciences, Nnamdi Azikiwe University, Awka, Nigeria
| | - Michael E Aronu
- Department of Radiology, Nnamdi Azikiwe University, Awka, Nigeria
| | - Christian E Okafor
- Department of Mechanical Engineering, Nnamdi Azikiwe University, Awka, Nigeria
| | - Christopher I Idumah
- Department of Polymer and Textile Engineering, Nnamdi Azikiwe University, Awka, Nigeria
| | - Imhade P Okokpujie
- Department of Mechanical and Mechatronic Engineering, Afe-Babalola University, Ado-Ekiti, Nigeria
| | - Nelson N Chukwu
- National Engineering Design Development Institute, Nnewi, Anambra State, Nigeria
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29
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Kadlcikova D, Musilova P, Hradska H, Vozdova M, Petrovova M, Svoboda M, Rubes J. Chromosomal damage in occupationally exposed health professionals assessed by two cytogenetic methods. ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2022; 78:158-169. [PMID: 36073861 DOI: 10.1080/19338244.2022.2118213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The study assessed occupationally induced chromosomal damage in hospital personnel at risk of exposure to antineoplastic drugs and/or low doses of ionizing radiation by two cytogenetic methods. Cultured peripheral blood lymphocytes of eighty-five hospital workers were examined twice over 2 to 3 years by classical chromosomal aberration analysis and fluorescence in situ hybridization. The comparison of the 1st and the 2nd sampling of hospital workers showed a significant increase in chromatid and chromosomal aberrations (all p < .05) examined by classical chromosomal aberration analysis, and in unstable aberrations (all p < .05) detected by fluorescence in situ hybridization. Both cytogenetic methods were able to detect an increase of unstable aberrations in the 2nd sampling. The raised frequency of unstable cytogenetic parameters suggested higher recent exposure to genotoxic agents.
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Affiliation(s)
- Dita Kadlcikova
- Department of Genetics and Reproductive Biotechnologies, Central European Institute of Technology - Veterinary Research Institute, Brno, Czech Republic
| | - Petra Musilova
- Department of Genetics and Reproductive Biotechnologies, Central European Institute of Technology - Veterinary Research Institute, Brno, Czech Republic
| | - Hana Hradska
- Department of Genetics and Reproductive Biotechnologies, Central European Institute of Technology - Veterinary Research Institute, Brno, Czech Republic
| | - Miluse Vozdova
- Department of Genetics and Reproductive Biotechnologies, Central European Institute of Technology - Veterinary Research Institute, Brno, Czech Republic
| | - Marketa Petrovova
- Clinic of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Marek Svoboda
- Clinic of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Jiri Rubes
- Department of Genetics and Reproductive Biotechnologies, Central European Institute of Technology - Veterinary Research Institute, Brno, Czech Republic
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30
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Pohjoismäki JLO, Goffart S. Adaptive and Pathological Outcomes of Radiation Stress-Induced Redox Signaling. Antioxid Redox Signal 2022; 37:336-348. [PMID: 35044250 DOI: 10.1089/ars.2021.0257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Significance: Ionizing radiation can damage cells either directly or through oxidative damage caused by ionization. Although radiation exposure from natural sources is very limited, ionizing radiation in nuclear disaster zones and long spaceflights causes inconspicuous, yet measurable physiological effects in men and animals, whose significance remains poorly known. Understanding the physiological impacts of ionizing radiation has a wide importance due to the increased use of medical imaging and radiotherapy. Recent Advances: Radiation exposure has been traditionally investigated from the perspective of DNA damage and its consequences. However, recent studies from Chernobyl as well as spaceflights have provided interesting insights into oxidative stress-induced metabolic alterations and disturbances in the circadian regulation. Critical Issues: In this review, we discuss the physiological consequences of radiation exposure in the light of oxidative stress signaling. Radiation exposure likely triggers many converging or interconnecting signaling pathways, some of which mimic mitochondrial dysfunction and might explain the observed metabolic changes. Future Directions: Better understanding of the different radiation-induced signaling pathways might help to devise strategies for mitigation of the long-term effects of radiation exposure. The utility of fibroblast growth factor 21 (FGF21) as a radiation exposure biomarker and the use of radiation hormesis as a method to protect astronauts on a prolonged spaceflight, such as a mission to Mars, should be investigated. Antioxid. Redox Signal. 37, 336-348.
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Affiliation(s)
- Jaakko L O Pohjoismäki
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Steffi Goffart
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
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Paul SN, Frazzoli C, Sikoki FD, Babatunde BB, Orisakwe OE. Natural occurring radioactive materials (NORMs) from mining sites in Nigeria: A systematic review of geographical distribution and public health concern. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2022; 249:106889. [PMID: 35525078 DOI: 10.1016/j.jenvrad.2022.106889] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/10/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
Solid mineral mining activities have contributed to the distribution and uptake of radionuclides. This has increased the active concentration of naturally occurring radioactive materials NORMs in different environmental media with increased human health risks. This systematic review was aimed at assessing data on active concentration of naturally occurring radioactive materials in mining sites in Nigeria. Articles available on recognized data bases such as Google scholar, PubMed, Cochrane Library and Science Direct were used. Thirty-two studies were used for this systematic review after meeting the inclusion criteria. Reports of studies according to Geopolitical zones revealed 0% North-east, 4% for Southeast, 8% for South-South, 16% in North-West, 20% in South-West, and 52% from North-Central Nigeria. 50%, 45.2%, 50%, and 38.5% of included studies reported elevated active concentration of 232Th, 40K, 238U and 226Ra in soil above world regulatory standards of the ICRP, UNSCEAR and IAEA. Gross-alpha and gross-beta activity concentrations reference dose level (RDL) were exceeded in 83.3% and 80% of studies respectively with the highest values recorded in water 10.12Bq/l, and 14.63Bq/l from an artisanal gold mine in North-West Nigeria. These data agree with reports from other African countries, but lower than reports from China and India. NORMs may be of public health concerns notwithstanding the lean data from clinical and epidemiological studies in Nigeria. This study recommends a One Health approach on the radiological implications of mining sites in Nigeria.
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Affiliation(s)
- Samuel N Paul
- World Bank African Centre of Excellence for Public Health and Toxicological Research (ACE-PUTOR), University of Port Harcourt, PMB, Port Harcourt, Rivers State, Choba, 5323, Nigeria
| | - Chiara Frazzoli
- Department of Cardiovascular and Endocrine-Metabolic Diseases and Ageing, Istituto Superiore di Sanita, Rome, Italy
| | - Francis D Sikoki
- Department of Animal and Environmental Biology, University of Port Harcourt, PMB, Port Harcourt, Choba, 5323, Nigeria
| | - Bolaji B Babatunde
- Department of Animal and Environmental Biology, University of Port Harcourt, PMB, Port Harcourt, Choba, 5323, Nigeria
| | - Orish E Orisakwe
- World Bank African Centre of Excellence for Public Health and Toxicological Research (ACE-PUTOR), University of Port Harcourt, PMB, Port Harcourt, Rivers State, Choba, 5323, Nigeria.
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David E, Bitan R, Atlas S, Wolfson M, Fraifeld VE. Correlative links between natural radiation and life expectancy in the US population. Biogerontology 2022; 23:425-430. [PMID: 35727470 DOI: 10.1007/s10522-022-09971-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 05/31/2022] [Indexed: 11/30/2022]
Abstract
The linear no-threshold (LNT) hypothesis is still the ruling concept which dictates the radiation protection health policy and regulations. However, more and more studies show that not only that low dose radiation pose no danger to our health, but also exhibits clear beneficial health effects. Here, we evaluated the correlative links of the natural sources of radiation-terrestrial radiation (TR), cosmic radiation (CR), and Radon-222, with life expectancy, the most integrative index of population health. The results of this study show that the different sources of natural radiation display positive correlative links to life expectancy, which is in line with the hypothesis of radiation hormesis.
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Affiliation(s)
- Elroei David
- Nuclear Research Center Negev (NRCN), P.O. Box 9001, 8419001, Beer-Sheva, Israel.
| | - Roy Bitan
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Center for Multidisciplinary Research on Aging, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
| | - Sharona Atlas
- Nuclear Research Center Negev (NRCN), P.O. Box 9001, 8419001, Beer-Sheva, Israel.,The Department of Chemistry, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
| | - Marina Wolfson
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Center for Multidisciplinary Research on Aging, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
| | - Vadim E Fraifeld
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Center for Multidisciplinary Research on Aging, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
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Güngördü N, Kurtul S, Özdil A, Erdoğan MS. Does occupational ionizing radiation exposure in healthcare workers affect their hematological parameters? ARCHIVES OF ENVIRONMENTAL & OCCUPATIONAL HEALTH 2022; 78:80-87. [PMID: 35713609 DOI: 10.1080/19338244.2022.2089088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Blood cells are used as the most sensitive marker to determine the effects and intensity of ionizing radiation. This descriptive study aimed to evaluate the effect of radiation exposure on hematological parameters in healthcare workers who were exposed to radiation in a university hospital between May and June 2021. A total of 339 participants were included, of which 169 (49.9%) were radiation workers and 170 (50.1%) were in the control group. A decrease was observed in white blood cell and neutrophil counts in those exposed to ionizing radiation for less than 10 years; however, white blood cell, neutrophil, hemoglobin levels decreased, and red cell distribution width (RDW) levels increased in those exposed to ionizing radiation for 10 years or more (p < 0.005). A statistically significant increase was observed in the RDW and lymphocyte levels as the years of work experience in the profession increase in the group exposed to IR. The findings indicate that the effect of low-dose ionizing radiation on the hematopoietic system is related to the frequency and duration of the dose. Hematological parameters can be sensitive biomarkers of low-dose ionizing radiation; possible disturbances in the hematopoietic system can be recognized before the onset of symptoms, and necessary precautions can be taken promptly.
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Affiliation(s)
- Nejdiye Güngördü
- Department of Occupational Diseases, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Seher Kurtul
- Department of Occupational Diseases, Bozyaka Training and Research Hospital, Izmir, Turkey
| | - Ayşenur Özdil
- Department of Public Health, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Mehmet Sarper Erdoğan
- Department of Public Health, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
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Guo JJ, Liu N, Ma Z, Gong ZJ, Liang YL, Cheng Q, Zhong XG, Yao ZJ. Dose-Response Effects of Low-Dose Ionizing Radiation on Blood Parameters in Industrial Irradiation Workers. Dose Response 2022; 20:15593258221105695. [PMID: 35693871 PMCID: PMC9174562 DOI: 10.1177/15593258221105695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 05/17/2022] [Indexed: 11/24/2022] Open
Abstract
While previous studies have focused on the health effects of occupational
exposure of radiations on medical radiation workers, few have analyzed the
dose-response relationship between low radiation doses and changes in blood
parameters. Even fewer studies have been conducted on industrial worker
populations. Using a prospective cohort study design, this study collected
health examination reports and personal dose monitoring data from 705 industrial
irradiation workers who underwent regular physical examinations at Dongguan
Sixth People’s Hospital. The dose-response effects of low-dose ionizing
radiation on blood parameters were assessed using a generalized linear model and
restricted cubic spline model. Red blood cell counts decreased then increased,
before decreasing again with increasing ionizing radiation. This was in contrast
to the curve of the total platelet count after irradiation. Additionally, a
radiation dose of 2.904 mSv was the turning point for the nonlinear curve of
hemoglobin count changes. In conclusion, long-term, low-dose ionizing radiation
affects blood cell levels in industrial irradiation workers. There is a
nonlinear dose-response relationship between red blood cell, platelet, and
hemoglobin counts and the cumulative radiation dose. These findings should alert
radiation workers to seek preventive medical treatment before the occurrence of
any serious hematopoietic disease.
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Affiliation(s)
- Jia-jia Guo
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
| | - Ning Liu
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
| | - Zheng Ma
- The Sixth People’s Hospital of Dongguan, Dongguan, China
| | - Zi-jun Gong
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yue-lang Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
| | - Qi Cheng
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
| | | | - Zhen-jiang Yao
- Department of Epidemiology and Health Statistics, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
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Ghosh A. Biological and cellular responses of humans to high-level natural radiation: A clarion call for a fresh perspective on the linear no-threshold paradigm. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2022; 878:503478. [PMID: 35649671 DOI: 10.1016/j.mrgentox.2022.503478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 03/04/2022] [Accepted: 03/04/2022] [Indexed: 06/15/2023]
Abstract
There remains considerable uncertainty in obtaining risk estimates of adverse health outcomes of chronic low-dose radiation. In the absence of reliable direct data, extrapolation through the linear no-threshold (LNT) hypothesis forms the cardinal tenet of all risk assessments for low doses (≤ 100 mGy) and for the radiation protection principle of As Low As Reasonably Achievable (ALARA). However, as recent evidences demonstrate, LNT assumptions do not appropriately reflect the biology of the cell at the low-dose end of the dose-response curve. In this regard, human populations living in high-level natural radiation areas (HLNRA) of the world can provide valuable insights into the biological and cellular effects of chronic radiation to facilitate improved precision of the dose-response relationship at low doses. Here, data obtained over decades of epidemiological and radiobiological studies on HLNRA populations is summarized. These studies do not show any evidence of unfavourable health effects or adverse cellular effects that can be correlated with high-level natural radiation. Contrary to the assumptions of LNT, no excess cancer risks or untoward pregnancy outcomes have been found to be associated with cumulative radiation dose or in-utero exposures. Molecular biology-driven studies demonstrate that chronic low-dose activates several cellular defence mechanisms that help cells to sense, recover, survive, and adapt to radiation stress. These mechanisms include stress-response signaling, DNA repair, immune alterations and most importantly, the radiation-induced adaptive response. The HLNRA data is consistent with the new evolving paradigms of low-dose radiobiology and can help develop the theoretical framework of an alternate dose-response model. A rational integration of radiobiology with epidemiology data is imperative to reduce uncertainties in predicting the potential health risks of chronic low doses of radiation.
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Affiliation(s)
- Anu Ghosh
- Animal House Facility & Radiation Signaling Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India; Homi Bhabha National Institute (HBNI), Anushaktinagar, Mumbai 400 094, India.
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Chaudhari R, Kant CR, Garg A. Polymer-BiI 3 composites for high-performance, room-temperature, direct X-ray detectors. MRS COMMUNICATIONS 2022; 12:358-364. [PMID: 35492383 PMCID: PMC9030686 DOI: 10.1557/s43579-022-00185-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
UNLABELLED Low-energy X-rays have a predominant role in medical diagnostic applications, grown tremendously during recent Covid-19 pandemic times. Synthesis of stable, PMMA/polystyrene-BiI3 composites has been done through a facile, low-cost, dry-tumble mixing technique for direct X-ray detector applications. Comparative analysis of structural, optical, and photocurrent responses upon irradiation with low-energy X-rays (30 and 60 kV) ensue that PS-BiI3 demonstrates high SNR 3300, sensitivity 189 µC Gy-1 cm-3 and fast response time 30 ms, at dose rate 1.68 mGy s-1, affirming the composite to be prospective candidate for low-energy, room-temperature, direct X-ray detectors under low bias conditions. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1557/s43579-022-00185-6.
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Affiliation(s)
- Ritu Chaudhari
- Department of Applied Sciences and Humanities, Indira Gandhi Delhi Technical University for Women, Kashmere Gate, Delhi, 110006 India
| | - Chhaya Ravi Kant
- Department of Applied Sciences and Humanities, Indira Gandhi Delhi Technical University for Women, Kashmere Gate, Delhi, 110006 India
| | - Alka Garg
- Gargi College, University of Delhi, Siri Fort Road, New Delhi, 110049 India
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Jeyasugiththan J, Kumarihami AMC, Satharasinghe D, Mahakumara P, Senanayaka G, Jayakody I. Evaluation of thyroid radiation dose during abdominal Computed Tomography procedures and dose reduction effectiveness of thyroid shielding. Radiography (Lond) 2022; 28:704-710. [PMID: 35461784 DOI: 10.1016/j.radi.2022.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/08/2022] [Accepted: 04/11/2022] [Indexed: 11/26/2022]
Abstract
INTRODUCTION During abdominal Computed Tomography (CT) studies, vicinity organs receive a dose from scatter radiation. The thyroid is considered an organ at greater risk due to high radiosensitivity. METHODS The primary objective of this study was to determine the entrances surface dose (ESD) to the thyroid during abdominal CT studies and to evaluate the efficiency of dose reduction by lead shielding. The calibrated thermoluminescence dosimeter (TLD) chips were used to measure the ESD during 180 contrast-enhanced (CE) and non-contrast-enhanced (NC) abdominal CT studies in the presence and absence of lead shielding. RESULTS Thyroid shielding reduces the ESD by 72.3% (0.55 mGy), 86.5% (2.95 mGy) and 64.0% (2.24 mGy) during NC, 3-phase and 4-phase abdominal CT scans. Also, the patient height was identified as a parameter that inversely influenced the thyroid dose, proving that the taller patients receive less dose to the thyroid. Regardless, the scan parameters such as time and display field of view (DFOV) positively impact the thyroid dose. CONCLUSION Lead shielding can prevent the external scatter reaching the thyroid region by 64%-87% during the non-vicinity scans such as abdomen CT. However, the actual dose saving lies between 0.2% and 0.4%, compared to the total effective dose of the whole CT procedure. IMPLICATIONS FOR PRACTICE The thyroid shield can effectively reduce external scatter radiation during abdominal CT procedures. However, the dose saving is insignificant compared to the total effective dose from the whole examination. Therefore, the use of thyroid shielding should be carefully evaluated during CT abdomen procedures.
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Affiliation(s)
- J Jeyasugiththan
- Department of Nuclear Science, University of Colombo, Colombo, 00300, Sri Lanka.
| | - A M C Kumarihami
- Department of Nuclear Science, University of Colombo, Colombo, 00300, Sri Lanka; Department of Radiology, University Hospital of General Sir John Kotelawala Defence University, Werahera, 10290, Sri Lanka
| | - D Satharasinghe
- Department of Nuclear Science, University of Colombo, Colombo, 00300, Sri Lanka
| | - P Mahakumara
- Radiation Protection and Technical Services Division, Sri Lanka Atomic Energy Board, Baseline Road, Orugodawatta, Wellampitiya, Sri Lanka
| | - G Senanayaka
- Department of Radiology, University Hospital of General Sir John Kotelawala Defence University, Werahera, 10290, Sri Lanka; Department of Clinical Sciences, Faculty of Medicine, Sir John Kotelawala Defence University, Ratmalana, 10390, Sri Lanka
| | - I Jayakody
- Department of Nuclear Science, University of Colombo, Colombo, 00300, Sri Lanka
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Abdel-Aziz N, Haroun RAH, Mohamed HE. Low-Dose Gamma Radiation Modulates Liver and Testis Tissues Response to Acute Whole Body Irradiation. Dose Response 2022; 20:15593258221092365. [PMID: 35444513 PMCID: PMC9014718 DOI: 10.1177/15593258221092365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/07/2022] [Indexed: 11/16/2022]
Abstract
Aim This work aims to investigate whether the pre-exposure to low dose/low dose rate (40 mGy, 2.2 mGy/hour) γ-radiation as a priming dose can produce a protective effect against the subsequent high one (4 Gy, .425 Gy/minute). Methods Rats were divided into Group I (control), Group II (L); exposed to 40 mGy, Group III (H); exposed to 4 Gy, and Group IV (L+H); exposed to 40 mGy 24 hours before the exposure to 4Gy. The molecular and biochemical changes related to oxidative stress, DNA damage, apoptosis, and mitochondrial activity in the liver and testis were studied 4 hours after irradiation. Results Exposure to 40 mGy before 4 Gy induced a significant increase in the levels of Nrf2, Nrf2 mRNA, TAC, and mitochondrial complexes I & II accompanied by a significant decrease in the levels of LPO, 8-OHdG, DNA fragmentation, TNF-α, caspase-3, and caspase-3 mRNA compared with H group. Conclusion Exposure to low-dose γ-radiation before a high dose provides protective mechanisms that allow the body to survive better after exposure to a subsequent high one via reducing the oxidative stress, DNA damage, and apoptosis-induced early after irradiation. However, further studies are required to identify the long-term effects of this low dose.
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Affiliation(s)
- Nahed Abdel-Aziz
- Department of Radiation Biology, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Riham A.-H. Haroun
- Department of Biochemistry, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Hebatallah E. Mohamed
- Department of Radiation Biology, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority, Cairo, Egypt
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A R S. Low dose effects of radiation. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2022; 876-877:503461. [PMID: 35483784 DOI: 10.1016/j.mrgentox.2022.503461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
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A case report of radiopharmaceutical needlestick injury with scintigraphic imaging and dose quantification. Radiol Case Rep 2022; 17:1718-1721. [PMID: 35345562 PMCID: PMC8956908 DOI: 10.1016/j.radcr.2022.02.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/15/2022] [Accepted: 02/19/2022] [Indexed: 11/20/2022] Open
Abstract
Attention to the implications of common needle stick injuries has focused heavily on the risk of cross-infection from blood-borne pathogens. An additional risk to the nuclear medicine healthcare worker is that of subcutaneous radioactive contamination from radiopharmaceuticals. This case report provides a rare opportunity to examine the clinical and operator causes of one such event during the dispensing of 99mTc-Tetrofosmin. Contamination monitoring, scintigraphic imaging, and quantification of effective radiation dose provide the level of risk to the operator from the subcutaneous radioactive contamination. Findings demonstrated a very low dose to operator and no deterministic radiobiological effects. Delayed imaging demonstrated negligible biological clearance from the injury site. Implications of the findings for clinical practice are discussed, highlighting the need for a careful and calm approach to radiopharmacy activities.
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Dawood AMA, Glover ET, Akortia E, Nyarku M, Essel P, Sarfo EO, Ameho ME, Aberikae EA. Environmental radiation and health risk assessment in the neighborhood of a radioactive waste management facility. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:314. [PMID: 35355157 DOI: 10.1007/s10661-022-09966-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
The Radioactive Waste Management Center (RWMC) of the Ghana Atomic Energy Commission (GAEC) operates a licensed radioactive waste management facility known as the Centralized Radioactive Waste Management Facility (CRWMF). The Center undertakes environmental radiation monitoring in which indoor dose rates at various microenvironments, and nearby ambient environments of the facility are measured. A 2-year radiation dose data (i.e., 2017 and 2018) obtained from the monitoring exercise was used to determine whole-body exposure and cancer risk analysis for adult and child age groups. With the exception of the high dose area of the facility, observed doses in all microenvironments of the facility as well as the ambient environment were below the regulatory dose limits of 1 mSv/y and 20 mSv/y, set for radiation workers and the general public, respectively. Dose rate variation for the 2017 and 2018 datasets were not significant (p > 0.05) at 95% confidence interval (CI). Cancer risks due to exposure to alpha, neutron, and gamma radiation sources for both adult and child age groups were above the global average value of 2.90 × 10-4 reported by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). Gamma sources recorded the highest cancer risk followed by neutron and alpha sources with risk values of 3.95 × 10-1 and 3.92 × 10-2; 4.06 × 10-2 and 4.03 × 10-3; and 7.96 × 10-4 and 7.91 × 10-5 for the adult and child age groups, respectively. Radium (226Ra) recorded the highest activity concentration (9.62 × 1010 Bq) with 4 quantities in the inventory while plutonium-beryllium (as alloyed source) recorded the lowest activity concentration (9.82 × 1001) with 12 quantities in the inventory.
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Affiliation(s)
- Abdallah M A Dawood
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana.
| | - Eric T Glover
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
| | - Eric Akortia
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
| | - Mawutorli Nyarku
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
| | - Paul Essel
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
| | - Evelyn O Sarfo
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
| | - Mawuli E Ameho
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
| | - Emmanuel A Aberikae
- Radioactive Waste Management Center, Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana
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Jebelli J, Hamper MC, Van Quelef D, Caraballo D, Hartmann J, Kumi-Diaka J. The Potential Therapeutic Effects of Low-Dose Ionizing Radiation in Alzheimer's Disease. Cureus 2022; 14:e23461. [PMID: 35371871 PMCID: PMC8958987 DOI: 10.7759/cureus.23461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2022] [Indexed: 01/20/2023] Open
Abstract
Dementia is an umbrella term used to describe a loss of cognitive function which results in the interference of an individual's daily life and activities. The most common form of dementia is Alzheimer's disease. Alzheimer’s is classified as a progressive, debilitating neurodegenerative disease that results in disturbances to a patient’s higher executive function, memory, language, and visuospatial orientation. Despite extensive research on Alzheimer’s dementia, including both available and potential therapeutic modalities, this neurodegenerative disease is incurable and will continue to pose a major public health concern. Current treatment options for Alzheimer’s focus on symptom management and/or delaying the progression of the disease. Therefore, new treatment strategies must be developed to combat such a deadly disease. One field of medicine that has garnered significant interest from researchers to potentially treat Alzheimer’s is low-dose ionizing radiation. Various reports suggest that the brain’s exposure to low doses of ionizing radiation may serve as a therapeutic modality for combating neurodegenerative diseases, including Alzheimer’s dementia. This article serves as a review of the current available treatments for Alzheimer’s disease and discusses recent studies that provide evidence for the potential use of low-dose ionizing radiation as a therapeutic in the treatment of Alzheimer’s disease.
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Bhinder J, Fakhoury E, O'Brien-Irr M, Reilly B, Dryjski M, Dosluoglu H, Cherr G, Harris L. National Survey of Vascular Surgery Residents & Fellows on Radiation Exposure and Safety Practices. J Vasc Surg 2022; 76:274-279.e1. [PMID: 35065221 DOI: 10.1016/j.jvs.2021.12.080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/26/2021] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate radiation safety practices, radiation training, and radiation exposure among senior vascular residents and fellows in ACGME accredited programs across the United States. METHODS Anonymous surveys were sent to all ACGME program directors to be distributed to post graduate year 4-7 vascular trainees for completion. Survey questions focused upon program type (single or multiple hospital site), familiarity with their radiation officer, formal radiation training, frequency of radiation feedback, use of safety equipment, and adherence to ALARA principles. RESULTS There were a total of 95 respondents (27% response rate). Forty-nine (51.6%) individuals reported they had never met their radiation safety officer. Seventy-four (77.9%) reported that they had received formal radiation safety education. A total of 50 (53%) individuals reported feedback regarding monthly radiation exposure and 24 (25%) trainees reported never having received feedback on radiation exposure levels. All findings were found to be more common among multiple hospital site program respondents CONCLUSION: It should be of significant concern that such a high number of trainees are exceeding radiation exposure limits. Programs should strive to reduce radiation exposure through formal training, provision of safety equipment, modeling by attendings of adherence to ALARA principles, and timely exposure feedback.
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Affiliation(s)
- Jasmine Bhinder
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Elias Fakhoury
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Monica O'Brien-Irr
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Brendon Reilly
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Maciej Dryjski
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Hasan Dosluoglu
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Gregory Cherr
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY
| | - Linda Harris
- Division of Vascular Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY.
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Shape Prediction of Nasal Bones by Digital 2D-Photogrammetry of the Nose Based on Convolution and Back-Propagation Neural Network. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:5938493. [PMID: 35069786 PMCID: PMC8767378 DOI: 10.1155/2022/5938493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/27/2021] [Indexed: 11/25/2022]
Abstract
In rhinoplasty, it is necessary to consider the correlation between the anthropometric indicators of the nasal bone, so that it prevents surgical complications and enhances the patient's satisfaction. The penetrating form of high-energy electromagnetic radiation is highly impacted on human health, which has often raised concerns of alternative method for facial analysis. The critical stage to assess nasal morphology is the nasal analysis on its anthropology that is highly reliant on the understanding of the structural features of the nasal radix. For example, the shape and size of nasal bone features, skin thickness, and also body factors aggregated from different facial anthropology values. In medical diagnosis, however, the morphology of the nasal bone is determined manually and significantly relies on the clinician's expertise. Furthermore, the evaluation anthropological keypoint of the nasal bone is nonrepeatable and laborious, also finding widely differ and intralaboratory variability in the results because of facial soft tissue and equipment defects. In order to overcome these problems, we propose specialized convolutional neural network (CNN) architecture to accurately predict nasal measurement based on digital 2D photogrammetry. To boost performance and efficacy, it is deliberately constructed with many layers and different filter sizes, with less filters and optimizing parameters. Through its result, the back-propagation neural network (BPNN) indicated the correlation between differences in human body factors mentioned are height, weight known as body mass index (BMI), age, gender, and the nasal bone dimension of the participant. With full of parameters could the nasal morphology be diagnostic continuously. The model's performance is evaluated on various newest architecture models such as DenseNet, ConvNet, Inception, VGG, and MobileNet. Experiments were directly conducted on different facials. The results show the proposed architecture worked well in terms of nasal properties achieved which utilize four statistical criteria named mean average precision (mAP), mean absolute error (MAE), R-square (R2), and T-test analyzed. Data has also shown that the nasal shape of Southeast Asians, especially Vietnamese, could be divided into different types in two perspective views. From cadavers for bony datasets, nasal bones can be classified into 2 morphological types in the lateral view which “V” shape was presented by 78.8% and the remains were “S” shape evaluated based on Lazovic (2015). With 2 angular dimension averages are 136.41 ± 7.99 and 104.25 ± 5.95 represented by the nasofrontal angle (g-n-prn) and the nasomental angle (n-prn-sn), respectively. For frontal view, classified by Hwang, Tae-Sun, et al. (2005), nasal morphology of Vietnamese participants could be divided into three types: type A was present in 57.6% and type B was present in 30.3% of the noses. In particular, types C, D, and E were not a common form of Vietnamese which includes the remaining number of participants. In conclusion, the proposed model performed the potential hybrid of CNN and BPNN with its application to give expected accuracy in terms of keypoint localization and nasal morphology regression. Nasal analysis can replace MRI imaging diagnostics that are reflected by the risk to human body.
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Park J, Shin J, Min IK, Bae H, Kim YE, Chung YE. Image Quality and Lesion Detectability of Lower-Dose Abdominopelvic CT Obtained Using Deep Learning Image Reconstruction. Korean J Radiol 2022; 23:402-412. [PMID: 35289146 PMCID: PMC8961013 DOI: 10.3348/kjr.2021.0683] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/22/2021] [Accepted: 10/31/2021] [Indexed: 11/15/2022] Open
Affiliation(s)
- June Park
- Department of Radiology, Seoul Medical Center, Seoul, Korea
| | - Jaeseung Shin
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
| | - In Kyung Min
- Biostatistics Collaboration Unit, Department of Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Korea
| | - Heejin Bae
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
| | - Yeo-Eun Kim
- Department of Radiology, Seoul Medical Center, Seoul, Korea
| | - Yong Eun Chung
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
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Alanazi N, Alodhayb AN, Almutairi A, Alshehri H, AlYemni S, Alsowygh G, Abdulmawla S, Shamma K, Albrithen H, Muthuramamoorthy M, Almuqrin AH. Quartz Tuning Fork Sensor-Based Dosimetry for Sensitive Detection of Gamma Radiation. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7035. [PMID: 34832435 PMCID: PMC8619227 DOI: 10.3390/ma14227035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 11/03/2021] [Accepted: 11/15/2021] [Indexed: 01/18/2023]
Abstract
This study generally relates to nuclear sensors and specifically to detecting nuclear and electromagnetic radiation using an ultrasensitive quartz tuning fork (QTF) sensor. We aim to detect low doses of gamma radiation with fast response time using QTF. Three different types of QTFs (uncoated and gold coated) were used in this study in order to investigate their sensitivity to gamma radiations. Our results show that a thick gold coating on QTF can enhance the quality factor and increase the resonance frequency from 32.7 to 32.9 kHz as compared to uncoated QTF. The results also show that increasing the surface area of the gold coating on the QTF can significantly enhance the sensitivity of the QTF to radiation. We investigated the properties of gold-coated and uncoated QTFs before and after irradiation by scanning electron microscopy. We further investigated the optical properties of SiO2 wafers (quartz) by spectroscopic ellipsometry (SE). The SE studies revealed that even a small change in the microstructure of the material caused by gamma radiation would have an impact on mechanical properties of QTF, resulting in a shift in resonance frequency. Overall, the results of the experiments demonstrated the feasibility of using QTF sensors as an easy to use, low-cost, and sensitive radiation detector.
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Affiliation(s)
- Nadyah Alanazi
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
| | - Abdullah N. Alodhayb
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
- Research Chair for Tribology, Surface, and Interface Sciences, Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Atheer Almutairi
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
| | - Hanan Alshehri
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
| | - Sarah AlYemni
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
| | - Ghadah Alsowygh
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
| | - Sabaa Abdulmawla
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
| | - Khaled Shamma
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Hamad Albrithen
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; (N.A.); (A.N.A.); (A.A.); (H.A.); (S.A.); (G.A.); (S.A.); (K.S.); (H.A.)
- Research Chair for Tribology, Surface, and Interface Sciences, Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia;
- K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh 11451, Saudi Arabia
| | | | - Aljawhara H. Almuqrin
- Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11564, Saudi Arabia
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Doruyter AGG, Holness JL. Dual energy window imaging for optimisation of P/V ratios in VP SPECT. EJNMMI Phys 2021; 8:69. [PMID: 34655369 PMCID: PMC8520548 DOI: 10.1186/s40658-021-00417-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 10/01/2021] [Indexed: 11/21/2022] Open
Abstract
Purpose Ventilation–perfusion single-photon emission computed tomography (VP SPECT) plays an important role in pulmonary embolism diagnosis. Rapid results may be obtained using same-day ventilation followed by perfusion imaging, but generally requires careful attention to achieving an optimal count rate ratio (P/V ratio) of ≥ 3:1. This study investigated whether the ratio of counts simultaneously acquired in adjacent primary and Compton scatter energy windows (Eratio) on V SPECT was predictive of final normalised perfusion count rate (PCRnorm) on P SPECT using [99mTc]Tc-macroaggregated albumin (MAA), thus allowing for optimisation of P/V ratios. Methods Same-day VP SPECT studies acquired using standard protocols in adult patients during a 2-year period (training dataset) were assessed. Studies were included provided they were acquired with correct imaging parameters, and injection site imaging and laboratory records were available for quality control and normalised count rate corrections. Extraction of DICOM information, and linear regression were performed using custom Python and R scripts. A predictive tool was developed in Microsoft Excel. This tool was then validated using a second (validation) dataset of same-day studies acquired over a subsequent 7-month period. Accuracy of the prediction tool was assessed by calculating the mean absolute percentage error (MAPE). Results Of 643 studies performed, the scans of 342 participants (median age 30.4 years, 318 female) were included in the training dataset, the analysis of which yielded a significant regression equation (F(1,340) = 1057.3, p < 0.0001), with an adjusted R2 of 0.756 and MSE of 0.001089. A prediction tool designed for routine clinical use was developed for predicting final P/V ratio. Of an additional 285 studies, 198 were included in the second (validation) dataset (median age 29.7 years, 188 female). The Excel-based tool was shown to be 91% accurate (MAPE: 9%) in predicting P/V ratio. Conclusion The relationship between the ratio of simultaneously acquired counts in adjacent energy windows on V SPECT and perfusion count rate after administration of a known activity of [99mTc]Tc-MAA can be linearly approximated. A predictive tool based on this work may assist in optimising the dose and timing of [99mTc]Tc-MAA administration in same-day studies to the benefit of patients and workflows. Supplementary Information The online version contains supplementary material available at 10.1186/s40658-021-00417-z.
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Affiliation(s)
- A G G Doruyter
- NuMeRI Node for Infection Imaging, Central Analytical Facilities, Stellenbosch University, Cape Town, South Africa. .,Division of Nuclear Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.
| | - J L Holness
- Nuclear Medicine Division, Department of Radiation Medicine, University of Cape Town, Cape Town, South Africa
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Low Dose Ionising Radiation-Induced Hormesis: Therapeutic Implications to Human Health. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11198909] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The concept of radiation-induced hormesis, whereby a low dose is beneficial and a high dose is detrimental, has been gaining attention in the fields of molecular biology, environmental toxicology and radiation biology. There is a growing body of literature that recognises the importance of hormetic dose response not only in the radiation field, but also with molecular agents. However, there is continuing debate on the magnitude and mechanism of radiation hormetic dose response, which could make further contributions, as a research tool, to science and perhaps eventually to public health due to potential therapeutic benefits for society. The biological phenomena of low dose ionising radiation (LDIR) includes bystander effects, adaptive response, hypersensitivity, radioresistance and genomic instability. In this review, the beneficial and the detrimental effects of LDIR-induced hormesis are explored, together with an overview of its underlying cellular and molecular mechanisms that may potentially provide an insight to the therapeutic implications to human health in the future.
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Glycyrrhizin ameliorating sterile inflammation induced by low-dose radiation exposure. Sci Rep 2021; 11:18356. [PMID: 34526618 PMCID: PMC8443578 DOI: 10.1038/s41598-021-97800-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 08/31/2021] [Indexed: 01/01/2023] Open
Abstract
Glycyrrhizin (GL) is a direct inhibitor of HMGB1 which acts as an alarmin when excreted into the extracellular space. High-dose radiation in radiotherapy induces collateral damage to the normal tissue, which can be mitigated by GL inhibiting HMGB1. The purpose of this study was to assess changes in HMGB1 and pro-inflammatory cytokines and to evaluate the protective effect of GL after low-dose radiation exposure. BALB/c mice were irradiated with 0.1 Gy (n = 10) and 1 Gy (n = 10) with GL being administered to half of the mice (n = 5, respectively) before irradiation. Blood and spleen samples were harvested and assessed for oxidative stress, HMGB1, pro-inflammatory cytokines, and cell viability. HMGB1 and pro-inflammatory cytokines increased and cell viability decreased after irradiation in a dose-dependent manner. Oxidative stress also increased after irradiation, but did not differ between 0.1 Gy and 1 Gy. With the pretreatment of GL, oxidative stress, HMGB1, and all of the pro-inflammatory cytokines decreased while cell viability was preserved. Our findings indicate that even low-dose radiation can induce sterile inflammation by increasing serum HMGB1 and pro-inflammatory cytokines and that GL can ameliorate the sterile inflammatory process by inhibiting HMGB1 to preserve cell viability.
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Boyd A, Byrne S, Middleton RJ, Banati RB, Liu GJ. Control of Neuroinflammation through Radiation-Induced Microglial Changes. Cells 2021; 10:2381. [PMID: 34572030 PMCID: PMC8468704 DOI: 10.3390/cells10092381] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/02/2021] [Accepted: 09/02/2021] [Indexed: 12/15/2022] Open
Abstract
Microglia, the innate immune cells of the central nervous system, play a pivotal role in the modulation of neuroinflammation. Neuroinflammation has been implicated in many diseases of the CNS, including Alzheimer's disease and Parkinson's disease. It is well documented that microglial activation, initiated by a variety of stressors, can trigger a potentially destructive neuroinflammatory response via the release of pro-inflammatory molecules, and reactive oxygen and nitrogen species. However, the potential anti-inflammatory and neuroprotective effects that microglia are also thought to exhibit have been under-investigated. The application of ionising radiation at different doses and dose schedules may reveal novel methods for the control of microglial response to stressors, potentially highlighting avenues for treatment of neuroinflammation associated CNS disorders, such as Alzheimer's disease and Parkinson's disease. There remains a need to characterise the response of microglia to radiation, particularly low dose ionising radiation.
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Affiliation(s)
- Alexandra Boyd
- Australian Nuclear Science and Technology Organisation, Sydney, NSW 2234, Australia; (A.B.); (S.B.); (R.J.M.); (R.B.B.)
| | - Sarah Byrne
- Australian Nuclear Science and Technology Organisation, Sydney, NSW 2234, Australia; (A.B.); (S.B.); (R.J.M.); (R.B.B.)
| | - Ryan J. Middleton
- Australian Nuclear Science and Technology Organisation, Sydney, NSW 2234, Australia; (A.B.); (S.B.); (R.J.M.); (R.B.B.)
| | - Richard B. Banati
- Australian Nuclear Science and Technology Organisation, Sydney, NSW 2234, Australia; (A.B.); (S.B.); (R.J.M.); (R.B.B.)
- Discipline of Medical Imaging & Radiation Sciences, Faculty of Medicine and Health, Brain and Mind Centre, University of Sydney, Sydney, NSW 2050, Australia
| | - Guo-Jun Liu
- Australian Nuclear Science and Technology Organisation, Sydney, NSW 2234, Australia; (A.B.); (S.B.); (R.J.M.); (R.B.B.)
- Discipline of Medical Imaging & Radiation Sciences, Faculty of Medicine and Health, Brain and Mind Centre, University of Sydney, Sydney, NSW 2050, Australia
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