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Mphaga KV, Utembe W, Rathebe PC. Radon exposure risks among residents proximal to gold mine tailings in Gauteng Province, South Africa: a cross-sectional preliminary study protocol. Front Public Health 2024; 12:1328955. [PMID: 38525346 PMCID: PMC10957527 DOI: 10.3389/fpubh.2024.1328955] [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: 10/27/2023] [Accepted: 02/15/2024] [Indexed: 03/26/2024] Open
Abstract
Gold mine tailings, a legacy of the mining industry, harbors significant amount of radon gas, a classified human carcinogen. Radon exposure, especially near tailings, is a significant public health threat, potentially leading to increased risk of lung cancer, leukemia, and chronic obstructive pulmonary disease (COPD). These health problems are often associated with lower survival rates and significant financial burdens. This ongoing research aim to evaluating the relationship between indoor radon exposure and lung cancer, leukemia, and COPD risks among residents proximal to gold mine tailings in Gauteng Province, South Africa. This cross-sectional preliminary study focus on two distinct groups: Riverlea (exposed group, <2 km to Gold mine tailings) and Orlando East (unexposed group, >2 km to Gold mine tailings). Indoor radon levels is measured using AlphaE monitors, while health risks (lung cancer, leukemia, and COPD) linked to exposure are evaluated through interview-administered questionnaire and secondary data from Gauteng Health Department. Of the 476 residents randomly selected for this study, 300 have already participated, with balanced representation from both the exposed and unexposed groups. The study will compare indoor radon levels and health outcomes between the two groups. This study's results could aid in creating targeted interventions and policies to mitigate indoor radon exposure risks and safeguard vulnerable communities from this significant public health hazard.
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Affiliation(s)
- Khathutshelo Vincent Mphaga
- Department of Environmental Health, Faculty of Health Sciences, Doornfontein Campus, University of Johannesburg, Johannesburg, South Africa
| | - Wells Utembe
- Department of Environmental Health, Faculty of Health Sciences, Doornfontein Campus, University of Johannesburg, Johannesburg, South Africa
- National Health Laboratory Service, Toxicology and Biochemistry Department, National Institute for Occupational Health, Johannesburg, South Africa
| | - Phoka Caiphus Rathebe
- Department of Environmental Health, Faculty of Health Sciences, Doornfontein Campus, University of Johannesburg, Johannesburg, South Africa
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2
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Chaudhury D, Sen U, Biswas S, Shenoy P S, Bose B. Assessment of Threshold Dose of Thoron Inhalation and Its Biological Effects by Mimicking the Radiation Doses in Monazite Placer Deposits Corresponding to the Normal, Medium and Very High Natural Background Radiation Areas. Biol Trace Elem Res 2023; 201:2927-2941. [PMID: 36048359 DOI: 10.1007/s12011-022-03398-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 08/14/2022] [Indexed: 11/02/2022]
Abstract
The dose contributed from thoron (220Rn) and its progeny has been neglected in the dose assessment because of its short half-life (t1/2 = 55.6 s) and generally low concentrations. Recently, concentrations of 220Rn gas and its progeny were found to be pronounced in the traditional residential dwellings in China, on beaches of India and in other countries. Accordingly, we investigated the biological effects of thoron (220Rn) decay products in various mouse organs, succeeding inhalation of thoron gas in BALB/c mouse. We investigated the biological effects upon thoron inhalation on mouse organs with a focus on oxidative stress. These mice were divided into (4 random groups): sham inhalation, thoron inhalation for 1, 4 and 10 days. Various tissues (lung, liver and kidney) were then collected after the time points and subjected to various biochemical analyses. Immediately after inhalation, mouse tissues were excised for gamma spectrometry and 72 h post inhalation for biochemical assays. The gamma spectrometry counts and its subsequent calculation of the equivalent dose showed varied distribution in the lung, liver and kidney. Our results suggest that acute thoron inhalation showed a differential effect on the antioxidant function and exerted pathophysiological alterations via oxidative stress in organs at a higher dose. These findings suggested that thoron inhalation could alter the redox state in organs; however, its characteristics were dependent on the total redox system of the organs as well as the thoron concentration and inhalation time.
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Affiliation(s)
- Debajit Chaudhury
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India
| | - Utsav Sen
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India
| | - Siddhartha Biswas
- Department of Onco-Pathology, Yenepoya Medical College, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India
| | - Sudheer Shenoy P
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India.
| | - Bipasha Bose
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Derlakatte, Mangalore, Karnataka, 575018, India.
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Maier A, Bailey T, Hinrichs A, Lerchl S, Newman RT, Fournier C, Vandevoorde C. Experimental Setups for In Vitro Studies on Radon Exposure in Mammalian Cells-A Critical Overview. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:ijerph20095670. [PMID: 37174189 PMCID: PMC10178159 DOI: 10.3390/ijerph20095670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/20/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023]
Abstract
Naturally occurring radon and its short lived progeny are the second leading cause of lung cancer after smoking, and the main risk factor for non-smokers. The radon progeny, mainly Polonium-218 (218Po) and Polonium-214 (214Po), are responsible for the highest dose deposition in the bronchial epithelium via alpha-decay. These alpha-particles release a large amount of energy over a short penetration range, which results in severe and complex DNA damage. In order to unravel the underlying biological mechanisms which are triggered by this complex DNA damage and eventually give rise to carcinogenesis, in vitro radiobiology experiments on mammalian cells have been performed using radon exposure setups, or radon analogues, which mimic alpha-particle exposure. This review provides an overview of the different experimental setups, which have been developed and used over the past decades for in vitro radon experiments. In order to guarantee reliable results, the design and dosimetry of these setups require careful consideration, which will be emphasized in this work. Results of these in vitro experiments, particularly on bronchial epithelial cells, can provide valuable information on biomarkers, which can assist to identify exposures, as well as to study the effects of localized high dose depositions and the heterogeneous dose distribution of radon.
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Affiliation(s)
- Andreas Maier
- Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Tarryn Bailey
- Department of Physics, Stellenbosch University, Stellenbosch, Cape Town 7600, South Africa
- Radiation Biophysics Division, Separated Sector Cyclotron Laboratory, NRF-iThemba LABS, Cape Town 7129, South Africa
| | - Annika Hinrichs
- Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Physics Department, Goethe University Frankfurt am Main, 60438 Frankfurt am Main, Germany
| | - Sylvie Lerchl
- Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Richard T Newman
- Department of Physics, Stellenbosch University, Stellenbosch, Cape Town 7600, South Africa
| | - Claudia Fournier
- Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Charlot Vandevoorde
- Biophysics Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Radiation Biophysics Division, Separated Sector Cyclotron Laboratory, NRF-iThemba LABS, Cape Town 7129, South Africa
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4
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Li P, Sun Q, Geng J, Shi Q, Hu J, Tang S. A study on the differences in radon exhalation of different lithologies at various depths and the factors influencing its distribution in northern Shaanxi, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 849:157935. [PMID: 35948128 DOI: 10.1016/j.scitotenv.2022.157935] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/05/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
The inhalation of a high concentration of radon gas increases the risk of cancer. Therefore, it is of utmost necessity to pay due attention to the problem of environmental radon pollution. The high radioactivity above the coal slab causes serious radon radiation contamination on the mining grounds in coal mining areas such as the northern part of China and the western part of the United States. At present, there is a lack of research on radon exhalation in different lithologies. In this study, the differences in the radon exhalation of different lithologies at various depths and their controlling factors were studied by NMR and radon measurement. The results highlighted that the radon exhalation rates in different rocks varied from 0.3 to 0.6 Bq/m2·s. The average radon exhalation rate of the soil was 0.7 Bq/m2·s, and the radon exhalation rates of different lithologies followed the pattern red clay > loess > sandstone > mudstone > coal. The radon exhalation rate increased initially, followed by a decrease, and the radon exhalation rate was the highest at the boundary between the soil and rock layers. The radon exhalation rates of different lithologies have a strong correlation with the small pores (<0.1 μm), which govern the changes in the porous structure with depth. The results of this study are important from the perspective evaluation of environmental radon pollution.
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Affiliation(s)
- Pengfei Li
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China.
| | - Qiang Sun
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, 710054, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, China.
| | - Jishi Geng
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China.
| | - Qingmin Shi
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, 710054, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, China.
| | - Jianjun Hu
- Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Shengli Tang
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China
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5
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Measurement of Radon Concentration in Water within Ojo Axis of Lagos State, Nigeria. ANALYTICA 2022. [DOI: 10.3390/analytica3030023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: The problem of radon (Radon-222) in water is one of the daily health hazards faced by those in Ojo Axis, Nigeria. Therefore, continuous monitoring of radon contamination in different types of water is essential. In the present work, sixteen groundwater and surface-water samples (wells, boreholes, and sachets) were collected from six different locations within the Ojo Local Government area in Nigeria. The water samples collected were stored in 75 cl bottles that were already sterilized with distilled water to avoid contamination. Water samples were then taken to the laboratory for the analysis of radon levels using a RAD7, an active electronic device produced by the Durridge Company in the USA. The radon level in the water is higher than the safe limits of 11.1 Bq/L, as per EPA regulations, except for two sample points from the studied areas. The total annual effective doses from ingestion and inhalation for drinking and groundwater were higher than the safe limit of 0.1 mSv y−1 that is recommended by the World Health Organization and the European Union Commission. Conclusions: The obtained results underline the importance of the development and/or updating of databases regarding radon levels in drinking and groundwater in the Ojo Local Government area in Nigeria.
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Li P, Sun Q, Geng J, Yan X, Tang L. Radon exhalation from temperature treated loess. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 832:154925. [PMID: 35367261 DOI: 10.1016/j.scitotenv.2022.154925] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/23/2022] [Accepted: 03/26/2022] [Indexed: 06/14/2023]
Abstract
Radon gas is a cancer risk and exists naturally in certain soils, such as loess, which is an important raw earth construction material in arid regions such as northwestern China and southern USA. Accordingly, the radon exhalationed from building materials is of increasing concern; however, there is little research on radon exhalation from loess. In this study, the pore structure and radon exhalation characteristics of heat-treated loess were investigated by nitrogen adsorption tests, swept surface electron microscopy, and radon measurements. The rate of radon exhalation increases linearly with temperature until 400 °C and then decreases exponentially. Changes in the internal pore structure (pore type, surface morphology, and specific surface area) of loess are strongly correlated with the radon exhalation rate. The volume of micropores (<2 nm diameter) is an important influence on radon exhalation ability, which is closely related to the fractal dimension of the micropore structure after heating. The results provide guidance for predicting the radiation risk posed by radon diffusing from loess.
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Affiliation(s)
- Pengfei Li
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China.
| | - Qiang Sun
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, 710054, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, China.
| | - Jishi Geng
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China.
| | - Xusheng Yan
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China.
| | - Liyun Tang
- College of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China.
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Djabou RE, Mavon C, Belafrites A, Groetz JE. Mining treatment effects on natural radioactivity and radiological hazard index assessment in phosphates and fertilizers used in Algeria. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08258-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Kussainova A, Bulgakova O, Aripova A, Khalid Z, Bersimbaev R, Izzotti A. The Role of Mitochondrial miRNAs in the Development of Radon-Induced Lung Cancer. Biomedicines 2022; 10:428. [PMID: 35203638 PMCID: PMC8962319 DOI: 10.3390/biomedicines10020428] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/07/2022] [Accepted: 02/07/2022] [Indexed: 12/07/2022] Open
Abstract
MicroRNAs are short, non-coding RNA molecules regulating gene expression by inhibiting the translation of messenger RNA (mRNA) or leading to degradation. The miRNAs are encoded in the nuclear genome and exported to the cytosol. However, miRNAs have been found in mitochondria and are probably derived from mitochondrial DNA. These miRNAs are able to directly regulate mitochondrial genes and mitochondrial activity. Mitochondrial dysfunction is the cause of many diseases, including cancer. In this review, we consider the role of mitochondrial miRNAs in the pathogenesis of lung cancer with particular reference to radon exposure.
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Affiliation(s)
- Assiya Kussainova
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genoa, Italy; (A.K.); (Z.K.)
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N. Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (O.B.); (A.A.)
| | - Olga Bulgakova
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N. Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (O.B.); (A.A.)
| | - Akmaral Aripova
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N. Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (O.B.); (A.A.)
| | - Zumama Khalid
- Department of Health Sciences, University of Genova, Via Pastore 1, 16132 Genoa, Italy; (A.K.); (Z.K.)
| | - Rakhmetkazhi Bersimbaev
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N. Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (O.B.); (A.A.)
| | - Alberto Izzotti
- Department of Experimental Medicine, University of Genoa, 16132 Genoa, Italy
- IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
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9
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Reste J, Pavlovska I, Martinsone Z, Romans A, Martinsone I, Vanadzins I. Indoor Air Radon Concentration in Premises of Public Companies and Workplaces in Latvia. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:1993. [PMID: 35206181 PMCID: PMC8871745 DOI: 10.3390/ijerph19041993] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/03/2022] [Accepted: 02/08/2022] [Indexed: 02/04/2023]
Abstract
Considering the multitudes of people who spend their time working indoors in public premises and workplaces, it is worth knowing what their level of exposure is to natural radioactive radon gas, the second most widespread and dangerous carcinogen for lung cancer development after cigarette smoking. This state-level study covered most of the territory of Latvia and conducted 941 radon measurements with Radtrack2, placed for 4-6 months in the premises of public companies, educational institutions, medical care institutions, etc. The study found that 94.7% of samples did not exceed the national permissible limit (200 Bq/m3), the level at which preventive measures should be initiated. The median value of average specific radioactivity of radon in these premises was 48 Bq/m3 (Q1 and Q3 being 27 and 85 Bq/m3), which is below the average of the European region. Slightly higher concentrations were observed in well-insulated premises with plastic windows and poorer air exchange, mostly in schools (59 (36, 109) Bq/m3) and kindergartens (48 (32, 79) Bq/m3). Industrial workplaces had surprisingly low radon levels (28 (16, 55) Bq/m3) due to strict requirements for air quality and proper ventilation. Public premises and workplaces in Latvia mostly have low radon concentrations in the air, but more attention should be paid to adequate ventilation and air exchange.
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Affiliation(s)
- Jelena Reste
- Institute of Occupational Safety and Environmental Health, Riga Stradins University, Dzirciema Street 16, LV-1007 Riga, Latvia; (J.R.); (Z.M.); (I.V.)
| | - Ilona Pavlovska
- Laboratory of Hygiene and Occupational Diseases, Riga Stradins University, Ratsupites Street 5, LV-1069 Riga, Latvia;
| | - Zanna Martinsone
- Institute of Occupational Safety and Environmental Health, Riga Stradins University, Dzirciema Street 16, LV-1007 Riga, Latvia; (J.R.); (Z.M.); (I.V.)
| | - Andris Romans
- Radiation Safety Centre State Environmental Service of the Republic of Latvia, Rupniecibas Street 23, LV-1045 Riga, Latvia;
| | - Inese Martinsone
- Laboratory of Hygiene and Occupational Diseases, Riga Stradins University, Ratsupites Street 5, LV-1069 Riga, Latvia;
| | - Ivars Vanadzins
- Institute of Occupational Safety and Environmental Health, Riga Stradins University, Dzirciema Street 16, LV-1007 Riga, Latvia; (J.R.); (Z.M.); (I.V.)
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Zajac D. Inhalations with thermal waters in respiratory diseases. JOURNAL OF ETHNOPHARMACOLOGY 2021; 281:114505. [PMID: 34371115 DOI: 10.1016/j.jep.2021.114505] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 07/16/2021] [Accepted: 08/05/2021] [Indexed: 05/21/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Inhalations with thermal waters are an old therapeutic method used in the therapy of respiratory diseases as a treatment of choice showing a long-lasting outcome with no side effects. Paradoxically, there is little well-established research on their mechanisms of action. AIM OF THE STUDY The aim of this paper is therefore to summarize the influence of inhalatory treatment with thermal waters on the main symptoms and features of respiratory disorders including allergy-like symptoms, inflammation, oxidant-anti-oxidant balance, cellular influx, disturbed mucus secretions, recurrent infections, pulmonary and nasal function and quality of life. A short history of inhalations is also presented. MATERIALS AND METHODS The present paper is a sum-up of research articles on the use of inhalations with thermal waters in respiratory disorders. RESULTS According to the herein presented literature, the use of thermal water inhalations is beneficial for almost all manifestations of respiratory diseases. The mode of their action remains still unclear; however, it seems that the most important one relies on the restoration of proper defense mechanisms of the organism. CONCLUSIONS Inhalations with thermal waters alleviate symptoms of respiratory diseases. They also improve the quality of life of the patients and seem to be a good add-on therapy in the treatment of disorders of the respiratory system.
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Affiliation(s)
- Dominika Zajac
- Department of Respiration Physiology, Mossakowski Medical Research Institute, Polish Academy of Sciences, ul. Pawinskiego 5, 02-106, Warsaw, Poland.
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Internet of Things (IoT) Technologies for Managing Indoor Radon Risk Exposure: Applications, Opportunities, and Future Challenges. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112211064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Radon gas is a harmful pollutant with a well-documented adverse influence on public health. In poorly ventilated environments, that are often prone to significant radon levels, studies indicate a known relationship between human radon exposure and lung cancer. Recent technology advances, notably on the Internet of Things (IoT) ecosystem, allow the integration of sensors, computing, and communication capabilities into low-cost and small-scale devices that can be used for implementing specific cyber-physical systems (CPS) for online and real-time radon management. These technologies are crucial for improving the overall building indoor air quality (IAQ), contributing toward the so-called cognitive buildings, where human-based control is tending to decline, and building management systems (BMS) are focused on balancing critical factors, such as energy efficiency, human radon exposure management, and user experience, to achieve a more transparent and harmonious integration between technology and the built environment. This work surveys recent IoT technologies for indoor radon exposure management (monitoring, assessment and mitigation), and discusses its main challenges and opportunities, by focusing on methods, techniques, and technologies to answer the following questions: (i) What technologies have been recently in use for radon exposure management; (ii) how they operate; (iii) what type of radon detection mechanisms do they use; and (iv) what type of system architectures, components, and communication technologies have been used to assist the referred technologies. This contribution is relevant to pave the way for designing more intelligent and sustainable systems that rely on IoT and Information and Communications Technology (ICT), to achieve an optimal balance between these two critical factors: human radon exposure management and building energy efficiency.
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12
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Abdo MAS, Boukhair A, Fahad M, Ouakkas S, Arhouni FE, Hakkar M, Belahbib L, Al-Suhbani MN. Estimation of unattached and aerosol-attached activities of airborne short-lived radon progeny in indoor environments. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2021; 237:106665. [PMID: 34126300 DOI: 10.1016/j.jenvrad.2021.106665] [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: 01/19/2021] [Revised: 04/16/2021] [Accepted: 05/24/2021] [Indexed: 06/12/2023]
Abstract
Inhalation of the airborne short-lived radon progeny is regarded as the most crucial way of internal exposure to the natural radiation dose delivered to the human lung. In this respect, this study aims to determine the unattached and aerosol-attached activities of radon progeny and to estimate some important physical parameters employed to assess the radiological impact of this radiation on humans. For this purpose, radioactive aerosol samples collected on polycarbonate membrane filters to measure total alpha activity by passive alpha dosimetric technique using CR-39 detectors in sixteen different locations including some houses and workplaces in El Jadida city, in Morocco. In addition, the room-specific parameters and aerosol physical processes that affect the unattached and attached activity concentrations were determined. The obtained experimental results by the three-count method and room model parameters were used as input data on a developed PC-based software that we have developed to solve mathematical equations and calculate required physical quantities. Accordingly, the individual activities of radon progeny namely 218Po, 214Pb, and 214Po as well as radon activity concentration were determined. Simultaneously, the unattached and aerosol-attached activity concentrations (Cju and Cja) of radon progeny were calculated based on the room model calculation. Consequently, some radiological quantities used in the calculation of the lung dose were estimated. The results showed that the indoor radon activity concentration in different targeted locations ranges between 38 and 143 Bq. m-3 with an average value of 84.8 ± 9.5 Bq. m-3. The average obtained values of the equilibrium-equivalent concentration (Ceq), unattached fraction (fp), and equilibrium factor (F) at low and good ventilation rates change respectively from (24 Bq. m-3, 0.08, and 0.25) to (34 Bq. m-3, 0.02, and 0.41). Under normal environmental conditions, the average obtained values of Ceq, fp, and F, in houses and at workplaces were (17 Bq. m-3, 0.07, and 0.25) and (32 Bq. m-3, 0.04, and 0.35) respectively. Depending on the different aerosol conditions and obtained values of unattached fraction fp, the calculated average values of dose conversion factors (DCFs) were 8.70 mSv.WLM-1 and 11 mSv.WLM-1 in houses and workplaces respectively. These values were in good agreement with the recommended values by ICRP, which are in the order of 9 mSv.WLM-1 and 12 mSv.WLM-1 for houses and workplaces respectively.
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Affiliation(s)
- Maged Ahmed Saleh Abdo
- Laboratory of Nuclear, Atomic, Molecular, Mechanical and Energetic Physics, Department of Physics, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, 24000, Morocco
| | - Aziz Boukhair
- Laboratory of Nuclear, Atomic, Molecular, Mechanical and Energetic Physics, Department of Physics, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, 24000, Morocco; Regional Center of the Trades of Education and Training, Casablanca-Settat, Morocco.
| | - Mohammed Fahad
- Laboratory of Nuclear, Atomic, Molecular, Mechanical and Energetic Physics, Department of Physics, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, 24000, Morocco
| | - Saad Ouakkas
- Laboratory of Nuclear, Atomic, Molecular, Mechanical and Energetic Physics, Department of Physics, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, 24000, Morocco
| | - Fatima Ezzahra Arhouni
- Laboratory of Nuclear, Atomic, Molecular, Mechanical and Energetic Physics, Department of Physics, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, 24000, Morocco
| | - Mohammed Hakkar
- Laboratory of Nuclear, Atomic, Molecular, Mechanical and Energetic Physics, Department of Physics, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, 24000, Morocco
| | - Laila Belahbib
- Laboratory of Nuclear, Atomic, Molecular, Mechanical and Energetic Physics, Department of Physics, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, 24000, Morocco
| | - Musherah Naji Al-Suhbani
- Laboratory of Material Physics and Subatomic, Department of Physics, Faculty of Sciences, Ibn Toufail University, Kenitra, 14000, Morocco
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13
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Lopes SI, Nunes LJR, Curado A. Designing an Indoor Radon Risk Exposure Indicator (IRREI): An Evaluation Tool for Risk Management and Communication in the IoT Age. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:7907. [PMID: 34360202 PMCID: PMC8345734 DOI: 10.3390/ijerph18157907] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 11/20/2022]
Abstract
The explosive data growth in the current information age requires consistent new methodologies harmonized with the new IoT era for data analysis in a space-time context. Moreover, intuitive data visualization is a central feature in exploring, interpreting, and extracting specific insights for subsequent numerical data representation. This integrated process is normally based on the definition of relevant metrics and specific performance indicators, both computed upon continuous real-time data, considering the specificities of a particular application case for data validation. This article presents an IoT-oriented evaluation tool for Radon Risk Management (RRM), based on the design of a simple and intuitive Indoor Radon Risk Exposure Indicator (IRREI), specifically tailored to be used as a decision-making aid tool for building owners, building designers, and buildings managers, or simply as an alert flag for the problem awareness of ordinary citizens. The proposed methodology was designed for graphic representation aligned with the requirements of the current IoT age, i.e., the methodology is robust enough for continuous data collection with specific Spatio-temporal attributes and, therefore, a set of adequate Radon risk-related metrics can be extracted and proposed. Metrics are summarized considering the application case, taken as a case study for data validation, by including relevant variables to frame the study, such as the regulatory International Commission on Radiological Protection (ICRP) dosimetric limits, building occupancy (spatial dimension), and occupants' exposure periods (temporal dimension). This work has the following main contributions: (1) providing a historical perspective regarding RRM indicator evolution along time; (2) outlining both the formulation and the validation of the proposed IRREI indicator; (3) implementing an IoT-oriented methodology for an RRM indicator; and (4) a discussion on Radon risk public perception, undertaken based on the results obtained after assessment of the IRREI indicator by applying a screening questionnaire with a total of 873 valid answers.
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Affiliation(s)
- Sérgio Ivan Lopes
- ADiT-Lab, Instituto Politécnico de Viana do Castelo, Rua da Escola Industrial e Comercial de Nun’Alvares, 4900-347 Viana do Castelo, Portugal
- IT—Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Leonel J. R. Nunes
- PROMETHEUS, Unidade de Investigação em Materiais, Energia e Ambiente para a Sustentabilidade, Escola Superior Agrária, Instituto Politécnico de Viana do Castelo, Rua da Escola Industrial e Comercial de Nun’Alvares, 4900-347 Viana do Castelo, Portugal;
| | - António Curado
- PROMETHEUS, Unidade de Investigação em Materiais, Energia e Ambiente para a Sustentabilidade, Escola Superior de Tecnologia e Gestão, Instituto Politécnico de Viana do Castelo, Rua da Escola Industrial e Comercial de Nun’Alvares, 4900-347 Viana do Castelo, Portugal;
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Mousavi Aghdam M, Crowley Q, Rocha C, Dentoni V, Da Pelo S, Long S, Savatier M. A Study of Natural Radioactivity Levels and Radon/Thoron Release Potential of Bedrock and Soil in Southeastern Ireland. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18052709. [PMID: 33800209 PMCID: PMC7967442 DOI: 10.3390/ijerph18052709] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/28/2022]
Abstract
Radon (222Rn) and thoron (220Rn) account for almost two-thirds of the annual average radiation dose received by the Irish population. A detailed study of natural radioactivity levels and radon and thoron exhalation rates was carried out in a legislatively designated “high radon” area, as based on existing indoor radon measurements. Indoor radon concentrations, airborne radiometric data and stream sediment geochemistry were collated, and a set of soil samples were taken from the study area. The exhalation rates of radon (E222Rn) and thoron (E220Rn) for collected samples were determined in the laboratory. The resultant data were classified based on geological and soil type parameters. Geological boundaries were found to be robust classifiers for radon exhalation rates and radon-related variables, whilst soil type classification better differentiates thoron exhalation rates and correlated variables. Linear models were developed to predict the radon and thoron exhalation rates of the study area. Distribution maps of radon and thoron exhalation rates (range: E222Rn [0.15–1.84] and E220Rn [475–3029] Bq m−2 h−1) and annual effective dose (with a mean value of 0.84 mSv y−1) are presented. For some parts of the study area, the calculated annual effective dose exceeds the recommended level of 1 mSv y−1, illustrating a significant radiation risk. Airborne radiometric data were found to be a powerful and fast tool for the prediction of geogenic radon and thoron risk. This robust method can be used for other areas where airborne radiometric data are available.
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Affiliation(s)
- Mirsina Mousavi Aghdam
- Department of Civil and Environmental Engineering and Architecture, University of Cagliari, 09123 Cagliari, Italy;
- Department of Geology, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland;
- Correspondence:
| | - Quentin Crowley
- Department of Geology, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland;
| | - Carlos Rocha
- Biogeochemistry Research Group, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland; (C.R.); (M.S.)
| | - Valentina Dentoni
- Department of Civil and Environmental Engineering and Architecture, University of Cagliari, 09123 Cagliari, Italy;
| | - Stefania Da Pelo
- Department of Chemical and Geological Sciences, University of Cagliari, 09042 Cagliari, Italy;
| | - Stephanie Long
- Environmental Protection Agency of Ireland, D14YR62 Dublin, Ireland;
| | - Maxime Savatier
- Biogeochemistry Research Group, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland; (C.R.); (M.S.)
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15
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Ambrosino F, Thinová L, Briestenský M, Sabbarese C. STUDY OF 222RN CONTINUOUS MONITORING TIME SERIES AND DOSE ASSESSMENT IN SIX EUROPEAN CAVES. RADIATION PROTECTION DOSIMETRY 2020; 191:233-237. [PMID: 33123740 DOI: 10.1093/rpd/ncaa159] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The present work aims to assess the effective doses from long-term continual radon monitoring in six European caves (Slovenia, Slovakia and the Czech Republic), including influencing environmental factors. Caves are important radiation protection subjects because of elevated radon activity concentration (~kBq/m3), mostly due to the low natural ventilation. The sources of radon gas are most often underground rock layers and clastic sediments. The radon activity concentrations show seasonal variations, for which the outside temperature is the main driving force. The human health impact due to the radon inhalation in monitored caves was estimated through the annual effective dose, using the methodology provided by the International Commission on Radiological Protection (ICRP Publication 137). The annual effective dose could reach several tens of mSv, depending on the working hours spent in the underground.
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Affiliation(s)
- F Ambrosino
- Department of Mathematics and Physics, The University of Campania ``Luigi Vanvitelli'', Viale Lincoln 5, 81100 Caserta, Italy
| | - L Thinová
- Czech Technical University, Faculty of Nuclear Sciences and Physical Engineering, Břehová 7, 11519 Prague 1, Czech Republic
| | - M Briestenský
- Institute of Rock Structure and Mechanics, Czech Academy of Sciences, V Holešovičkách 41, 18209 Prague 8, Czech Republic
| | - C Sabbarese
- Department of Mathematics and Physics, The University of Campania ``Luigi Vanvitelli'', Viale Lincoln 5, 81100 Caserta, Italy
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16
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Al-Kazwini AT, Al-Arnaout MM, Abdulkareem TR. Radon-222 Exposure and Dose Concentration Levels in Jordanian Dwellings. JOURNAL OF ENVIRONMENTAL AND PUBLIC HEALTH 2020; 2020:6668488. [PMID: 33293966 PMCID: PMC7690995 DOI: 10.1155/2020/6668488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 10/24/2020] [Indexed: 11/22/2022]
Abstract
Exposure to high concentrations of radon gas is the leading cause of lung cancer for nonsmokers according to the World Health Organization (WHO) figures. With poor ventilation standards and lack of awareness among Jordanians, constant monitoring of radon concentrations is vital. Multiple efforts have been made since the 1990s in order to create a national radon map of Jordan, by acquiring average values of radon concentrations in major Jordanian cities. This study aims to replicate those efforts using a more accurate and modern way of detection for the purpose of comparing the current values with literature values and to update the previous radon concentration map of Jordan. The study concludes that radon concentrations in Jordan have mostly increased in the past 30 years from an overall average of 52 Bq/m3 to an average of 60.4 Bq/m3. Despite the increase, these results are considered under the threat line that is estimated conventionally by most of the international environmental and radiation-related organizations, which is 100-300 Bq/m3. It should be noted that only the Russeifa city has scored a value higher than the estimated threat line. This is due to the existence of abundant phosphate mines filled with condensed radon levels leaking from these ores. It is expected that radon concentrations in Jordan will increase in the coming years with the continuous urban sprawl and lack of public awareness about the radon gas health issue. A number of suggestions have been proposed in this study that could help the Jordanian society avoid a future possible health threat.
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Affiliation(s)
- Akeel T. Al-Kazwini
- Department of Biomedical Engineering, School of Applied Medical Sciences, German Jordanian University, Amman 11180, Jordan
| | - Mohannad. M. Al-Arnaout
- Department of Biomedical Engineering, School of Applied Medical Sciences, German Jordanian University, Amman 11180, Jordan
| | - Tiba R. Abdulkareem
- Department of Biomedical Engineering, School of Applied Medical Sciences, German Jordanian University, Amman 11180, Jordan
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17
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Ruth KM, Warutere PN, Nyamari J, Arika W. Levels of ionizing radiations in selected quarries in Nyamira County, Kenya. Heliyon 2020; 6:e04363. [PMID: 32685715 PMCID: PMC7355986 DOI: 10.1016/j.heliyon.2020.e04363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/10/2020] [Accepted: 06/29/2020] [Indexed: 10/26/2022] Open
Abstract
It has been shown through a survey by World Health Organization and International Commission on Radiological Protection that certain materials (stones) sourced from quarries and used for the building are radioactive. In Kenya, underground stones which are sourced from embedded rocks are used in construction of most of the permanent buildings, yet Kenya has not adequately radio-profiled sources of building materials to determine whether the construction materials contain radionuclides that emit ionizing radiations yet are used for building. Consequently, Kenyans could be at risk of exposure to high levels of ionizing radiations by living in stone houses that are not radio-profiled. Health problems arise due to subjection to ionizing radiations. The study determined the levels of ionizing radiations in sampled quarries in Nyamira County by using Radiological survey dosimeters to show the radiation readings in milliRoentgen/hr then converted to milliSievert per year and the Global Positioning System device took note of the quarries' geographical positions. The study used Minitab version 17.0 software to establish the statistical differences of degree of exposure in sampled quarries. The sample size for the study was 40 quarries. It was revealed that Q-073 and Q-075 both had the lowest radiation readings of 0.64mSv while Q-079 had the highest reading of 3.46mSv equal to a deviation from WHO approved threshold of -35.71%,-36.29% and 245.7%, respectively. The results indicated that 89% of the sampled quarries had radiation emissions above the ICRP and WHO standard. However, within Borabu Sub County, only 5 and within Manga Sub-County 4 of the sampled quarries had radiation readings below ICRP and WHO recommended standards of 1mSv/yr. It was exhibited from the study results that there are higher levels of ionizing radiations in quarries going past recommended standards per year hence causing health risk to quarry workers and general public. Therefore, these results could guide in formation of the national construction policies by including regular surveying for the levels of ionizing radiation in building materials as well as in practicing appropriate mitigation strategies.
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Affiliation(s)
- Kerubo Makori Ruth
- Department of Environmental and Occupational Health, School of Public Health, Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya
| | - Peterson Njogu Warutere
- Department of Environmental and Occupational Health, School of Public Health, Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya
| | - Jackim Nyamari
- Department of Environmental and Occupational Health, School of Public Health, Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya
| | - Wycliffe Arika
- Department of Biochemistry, Microbiology and Biotechnology, School of Pure and Applied Sciences, Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya
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18
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Bersimbaev R, Pulliero A, Bulgakova O, Asia K, Aripova A, Izzotti A. Radon Biomonitoring and microRNA in Lung Cancer. Int J Mol Sci 2020; 21:E2154. [PMID: 32245099 PMCID: PMC7139524 DOI: 10.3390/ijms21062154] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/18/2020] [Accepted: 03/18/2020] [Indexed: 12/17/2022] Open
Abstract
Radon is the number one cause of lung cancer in non-smokers. microRNA expression in human bronchial epithelium cells is altered by radon, with particular reference to upregulation of miR-16, miR-15, miR-23, miR-19, miR-125, and downregulation of let-7, miR-194, miR-373, miR-124, miR-146, miR-369, and miR-652. These alterations alter cell cycle, oxidative stress, inflammation, oncogene suppression, and malignant transformation. Also DNA methylation is altered as a consequence of miR-29 modification induced by radon. Indeed miR-29 targets DNA methyltransferases causing inhibition of CpG sites methylation. Massive microRNA dysregulation occurs in the lung due to radon expose and is functionally related with the resulting lung damage. However, in humans this massive lung microRNA alterations only barely reflect onto blood microRNAs. Indeed, blood miR-19 was not found altered in radon-exposed subjects. Thus, microRNAs are massively dysregulated in experimental models of radon lung carcinogenesis. In humans these events are initially adaptive being aimed at inhibiting neoplastic transformation. Only in case of long-term exposure to radon, microRNA alterations lead towards cancer development. Accordingly, it is difficult in human to establish a microRNA signature reflecting radon exposure. Additional studies are required to understand the role of microRNAs in pathogenesis of radon-induced lung cancer.
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Affiliation(s)
- Rakhmet Bersimbaev
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N.Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (R.B.); (O.B.); (K.A.); (A.A.)
| | - Alessandra Pulliero
- Department of Experimental Medicine, University of Genoa, I-16132 Genoa, Italy;
| | - Olga Bulgakova
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N.Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (R.B.); (O.B.); (K.A.); (A.A.)
| | - Kussainova Asia
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N.Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (R.B.); (O.B.); (K.A.); (A.A.)
| | - Akmara Aripova
- Department of General Biology and Genomics, Institute of Cell Biology and Biotechnology, L.N.Gumilyov Eurasian National University, Nur-Sultan, Akmola 010008, Kazakhstan; (R.B.); (O.B.); (K.A.); (A.A.)
| | - Alberto Izzotti
- Department of Experimental Medicine, University of Genoa, I-16132 Genoa, Italy;
- IRCCS Policlinico San Martino, 16132 Genoa, Italy
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19
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Monastero RN, Meliker JR. Incidence of brain and spinal cord cancer and county-level radon levels in New Jersey, Wisconsin, Minnesota, Pennsylvania, and Iowa, USA. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:389-395. [PMID: 31309376 DOI: 10.1007/s10653-019-00368-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 07/03/2019] [Indexed: 06/10/2023]
Abstract
Ionizing radiation at diagnostic and therapeutic doses is a known contributor to the development of brain and spinal cord (CNS) cancer. However, little is known about risk from exposure to radon, a natural radiation source which the general population is exposed to residentially and environmentally. This study investigated correlations between mean county radon levels and CNS cancer incidence in five highly populated and radon-enriched US states (Minnesota, mean radon level 4.6 pCi/L; Wisconsin, 5.7 pCi/L; Pennsylvania, 8.6 pCi/L; Iowa, 6.1 pCi/L; and New Jersey, 4.4 pCi/L). Mean radon levels per county were accessed through AirChek, which provides publicly available radon data measured in residences and workplaces. CNS cancer incidence data were accessed through the states' health department websites and span differing amounts of time due to the publicly accessible nature of the data, though all time spans were over 10 years. Negative binomial regressions were run to assess correlations between mean radon and CNS cancer incidence per county. Quantile maps were constructed and Moran's I was calculated to assess spatial autocorrelation in residuals; no spatial autocorrelation was evident. Iowa was the only state with a significant positive association between radon and CNS incidence; no associations were detected in other states, and a negative association was observed in the 5 states combined. This study does not provide evidence that radon is a risk factor for CNS cancer; however, the possibility of an association cannot be ruled out due to limitations of the study, principally its ecologic nature and lack of individual-level exposure data.
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Affiliation(s)
- Rebecca N Monastero
- School of Medicine, Stony Brook University, HSC L3, Rm 071, Stony Brook, NY, 11794, USA.
| | - Jaymie R Meliker
- School of Medicine, Stony Brook University, HSC L3, Rm 071, Stony Brook, NY, 11794, USA
- Department of Family, Population, and Preventive Medicine, Program in Public Health, Stony Brook University, HSC L3, Rm 071, Stony Brook, NY, 11794, USA
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20
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Computational Fluid Dynamic Simulation of Inhaled Radon Dilution by Auxiliary Ventilation in a Stone-Coal Mine Laneway and Dosage Assessment of Miners. Processes (Basel) 2019. [DOI: 10.3390/pr7080515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Inhaled radon status in the laneways of some Chinese stone-coal mines is a cause of concern. In this study, computational fluid dynamics simulations were employed to investigate three flowrates of the dilution gas (2.5, 5, and 7.5 m3/s) and radon distributions at realistic breathing levels (1.6, 1.75, and 1.9 m). The results showed that there are obvious jet-flow, backflow, and vortex zones near the heading face, and a circulation flow at the rear of the laneway. A high radon concentration area was found to be caused by the mining machinery. As the ventilation rate increased, the radon concentrations dropped significantly. An airflow of 7.5 m3/s showed the best dilution performance: The maximum radon concentration decreased to 541.62 Bq/m3, which is within the safe range recommended by the International Commission on Radiological Protection. Annual effective doses for the three air flowrates were 8.61, 5.50, and 4.12 mSv.
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21
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Díaz Lagos M, Sajo-Bohus L, Sandoval Garzón MA, Vergara Gómez I, Martínez-Ovalle SA. Radon concentration in hydrogeothermal deposit and spas of Boyacá, Colombia. Appl Radiat Isot 2019; 145:131-136. [PMID: 30597403 DOI: 10.1016/j.apradiso.2018.12.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/04/2018] [Accepted: 12/17/2018] [Indexed: 11/29/2022]
Abstract
Inhaled radon and its progenies induce health concern due to high activity-concentration in selected thermal spas of Boyacá region. Hydrogeothermal water sources in a high risk seismic area, are studied to determine by water bubbling method radon concentration values; their occurrence is between few hundreds and 2000 Bq dm-3. Deposits, existing in this area, reach at the surface soil gas radon concentration up to 210 kBq m-3. Maintenance workers, health tourists and visitor's possible detrimental health effects, are discussed in relation to radon balneotherapy beneficial aspects.
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Affiliation(s)
- M Díaz Lagos
- Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia
| | | | | | - I Vergara Gómez
- Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia
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22
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Pirsaheb M, Najafi F, Haghparast A, Hemati L, Sharafi K, Kurd N. The Influence of Internal Wall and Floor Covering Materials and Ventilation Type on Indoor Radon and Thoron Levels in Hospitals of Kermanshah, Iran. IRANIAN RED CRESCENT MEDICAL JOURNAL 2017; 18:e25292. [PMID: 28180013 PMCID: PMC5286217 DOI: 10.5812/ircmj.25292] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 04/02/2015] [Accepted: 05/03/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND Building materials and the ventilation rate of a building are two main factors influencing indoor radon and thoron levels (two radioactive gases which have the most important role in human natural radiation exposure within dwellings). OBJECTIVES This analytical descriptive study was intended to determine the relationship between indoor radon and thoron concentrations and the building materials used in interior surfaces, as well as between those concentrations and the type of ventilation system (natural or artificial). MATERIALS AND METHODS 102 measurements of radon and thoron levels were taken from different parts of three hospital buildings in the city of Kermanshah in the west of Iran, using an RTM-1688-2 radon meter. Information on the type of building material and ventilation system in the measurement location was collected and then analyzed using Stata 8 software and multivariate linear regression. RESULTS In terms of radon and thoron emissions, travertine and plaster were found to be the most appropriate and inappropriate covering for walls, respectively. Furthermore, granite and travertine were discovered to be inappropriate materials for flooring, while plastic floor covering was found suitable. Natural ventilation performed better for radon, while artificial ventilation worked better for thoron. CONCLUSIONS Internal building materials and ventilation type affect indoor radon and thoron concentrations. Therefore, the use of proper materials and adequate ventilation can reduce the potential human exposure to radon and thoron. This is of utmost importance, particularly in buildings with a high density of residents, including hospitals.
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Affiliation(s)
- Meghdad Pirsaheb
- Environmental Health Engineering Department, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Farid Najafi
- Epidemiology Research Center (KEERC), Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Abbas Haghparast
- Medical Physics Department, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Lida Hemati
- Research Center for Environmental Determinants of Health, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
- Environmental Health Engineering Department, School of Public Health, Ilam University of Medical Sciences, Ilam, IR Iran
- Corresponding Author: Lida Hemati, Research Center for Environmental Determinants of Health, Kermanshah University of Medical Sciences, Kermanshah, IR Iran. Tel: +98-9187240367; Fax: +98-8118380509, E-mail:
| | - Kiomars Sharafi
- School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, IR Iran
| | - Nematullah Kurd
- Department of Occupational Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Ilam, IR Iran
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23
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Abstract
AbstractThis paper presents selected issues related to the use of 222Rn in therapeutic treatments. Radon is a radioactive element whose usage in medicine for more than 100 years is based on the radiation hormesis theory. However, owing to the radioactive character of this element and the fact that its alpha-radioactive decay is the source of other radionuclides, its therapeutic application has been raising serious doubts. The author points to potential sources and carriers of radon in the environment that could supply radon for use in a variety of therapies. Except for centuries-long tradition of using radon groundwaters, and later also the air in caves and underground workings, the author would also like to focus on soil air, which is still underestimated as a source of radon. The text presents different methods of obtaining this radioactive gas from groundwaters, the air in caves, mining galleries and soil air, and it presents new possibilities in this field. The author also discusses problems related to the transportation and storage of radon obtained from the environment.Within radon-prone areas, it is often necessary to de-radon groundwaters that are intended for human consumption and household usage. Also, dry radon wells are used to prevent radon migration from the ground into residential buildings. The author proposes using radon released from radon groundwaters and amassed in dry radon wells for radonotherapy treatments. Thanks to this, it is possible to reduce the cost of radiological protection of people within radon-prone areas while still exploiting the 222Rn obtained for a variety of therapies.With regard to the ongoing and still unsettled dispute concerning the beneficial or detrimental impact of radon on the human organism, the author puts special emphasis on the necessity of strictly monitoring both the activity concentration of 222Rn in media used for therapeutic treatments and of its radioactive decay products. Monitoring should be also extended to the environments in which such treatments are delivered (inhalatoriums, baths, saunas, showers, pools and other facilities), as well as to the patients – during and after the radonotherapy treatments. It is also essential to monitor the dose of radon and its daughters that is received by persons undergoing radon therapy. This should facilitate the assessment of the effectiveness of these treatments, which may contribute to a fuller understanding of the mechanisms of radon impact, and ionizing radiation in general, on the human organism. This will make it easier to ultimately confirm or reject the radiation hormesis theory. It is also essential to monitor the effective dose that is received by medical and technical staff employed to deliver the radonotherapy treatments.
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Affiliation(s)
- Tadeusz Andrzej Przylibski
- Division of Geology and Mineral Waters, Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wybrzeże S. Wyspiańskiego 27, 50-370 Wrocław, Poland
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24
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Bersimbaev RI, Bulgakova O. The health effects of radon and uranium on the population of Kazakhstan. Genes Environ 2015; 37:18. [PMID: 27350814 PMCID: PMC4918080 DOI: 10.1186/s41021-015-0019-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 07/10/2015] [Indexed: 12/20/2022] Open
Abstract
The radioactive contamination is a significant factor affecting the environment and human health. Radon and its decay products are the major contributors to human exposure from natural radiation sources. World Health Organization has identified the chronic residential exposure to radon and its decay products as the second cause of lung cancer after tobacco consumption and also as the main risk-factor in never smokers. The high levels of radon are observed in the North and East areas of Kazakhstan because of the natural radiation sources and the long-term and large-scale mining of uranium. The genotoxic effects of radon on population of Kazakhstan are poorly understood, in spite of the fact that many regions of the country contain the high levels of radon. Studies elucidating potential health risk among population exposed to radon and genotoxic effect of radon in Kazakhstan are very limited or they have never been addressed in some areas. In this review, we are presenting available data on the residential radon exposure of humans in uranium mining and milling areas in the North and East areas of Kazakhstan.
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Affiliation(s)
- Rakmetkazhy I Bersimbaev
- Institute of Cell Biology and Biotechnology, Department of General Biology and Genomics, L.N.Gumilyov Eurasian National University, Munaitpassov str.5, 010008 Astana, Kazakhstan
| | - Olga Bulgakova
- Institute of Cell Biology and Biotechnology, Department of General Biology and Genomics, L.N.Gumilyov Eurasian National University, Munaitpassov str.5, 010008 Astana, Kazakhstan
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25
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Peckham EC, Scheurer ME, Danysh HE, Lubega J, Langlois PH, Lupo PJ. Residential Radon Exposure and Incidence of Childhood Lymphoma in Texas, 1995-2011. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:12110-26. [PMID: 26404336 PMCID: PMC4626958 DOI: 10.3390/ijerph121012110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 09/11/2015] [Accepted: 09/21/2015] [Indexed: 12/23/2022]
Abstract
There is warranted interest in assessing the association between residential radon exposure and the risk of childhood cancer. We sought to evaluate the association between residential radon exposure and the incidence of childhood lymphoma in Texas. The Texas Cancer Registry (n = 2147) provided case information for the period 1995–2011. Denominator data were obtained from the United States Census. Regional arithmetic mean radon concentrations were obtained from the Texas Indoor Radon Survey and linked to residence at diagnosis. Exposure was assessed categorically: ≤25th percentile (reference), >25th to ≤50th percentile, >50th to ≤75th percentile, and >75th percentile. Negative binomial regression generated adjusted incidence rate ratios (aIRR) and 95% confidence intervals (CI). We evaluated lymphoma overall and by subtype: Hodgkin (HL; n = 1248), Non-Hodgkin excluding Burkitt (non-BL NHL; n = 658), Burkitt (BL; n = 241), and Diffuse Large B-cell (DLBCL; n = 315). There was no evidence that residential radon exposure was positively associated with lymphoma overall, HL, or BL. Areas with radon concentrations >75th percentile had a marginal increase in DLBCL incidence (aIRR = 1.73, 95% CI: 1.03–2.91). In one of the largest studies of residential radon exposure and the incidence of childhood lymphoma, we found little evidence to suggest a positive or negative association; an observation consistent with previous studies.
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Affiliation(s)
- Erin C Peckham
- Department of Pediatrics, Section of Hematology-Oncology, Baylor College of Medicine, One Baylor Plaza, MS BCM305, Houston, TX 77030, USA.
| | - Michael E Scheurer
- Department of Pediatrics, Section of Hematology-Oncology, Baylor College of Medicine, One Baylor Plaza, MS BCM305, Houston, TX 77030, USA.
| | - Heather E Danysh
- Department of Pediatrics, Section of Hematology-Oncology, Baylor College of Medicine, One Baylor Plaza, MS BCM305, Houston, TX 77030, USA.
| | - Joseph Lubega
- Department of Pediatrics, Section of Hematology-Oncology, Baylor College of Medicine, One Baylor Plaza, MS BCM305, Houston, TX 77030, USA.
| | - Peter H Langlois
- Birth Defects Epidemiology and Surveillance Branch, Texas Department of State Health Services, MC 1964, P.O. Box 149347, Austin, TX 78714-9347, USA.
| | - Philip J Lupo
- Department of Pediatrics, Section of Hematology-Oncology, Baylor College of Medicine, One Baylor Plaza, MS BCM305, Houston, TX 77030, USA.
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26
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Lino ADR, Abrahão CM, Amarante MPF, de Sousa Cruz MR. The role of the implementation of policies for the prevention of exposure to Radon in Brazil-a strategy for controlling the risk of developing lung cancer. Ecancermedicalscience 2015; 9:572. [PMID: 26435745 PMCID: PMC4583309 DOI: 10.3332/ecancer.2015.572] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Indexed: 11/06/2022] Open
Abstract
Lung cancer is the leading cause of cancer death in the United States and other industrialised countries. The most important risk factor is active smoking. However, given the increased incidence of lung cancer in non-smokers, it is necessary to improve knowledge regarding other risk factors. Radon (Rn) is a noble gas and is the most important natural source of human exposure to ionizing radiation. Exposure to high levels of this radioactive gas is related to an increased risk of developing lung cancer. The objective of this work is to highlight the importance of measuring indoor concentration of this gas and identify which steps should be taken for achieving radiological protection. A survey was conducted on the websites of the National Health Surveillance Agency (ANVISA), LAMIN (Mineral Analysis Laboratory), CPRM (Geological Survey of Brazil), Ministry of Health and PubMed. Using the words 'radon', 'lung', 'cancer', and PubMed®, 1,371 results were obtained; when using the words 'radon', 'lung', 'cancer', and with 'Brazil' or 'Brazilians', only six results were obtained. We emphasise that lung cancer is a major public health problem and the exposure to Rn indoors should be considered as a risk factor for lung cancer in non-smokers. Buildings or houses with high concentrations of Rn should be identified. However, currently in Brazil-a country with great potential for mineral extraction-there are no specific regulated recommendations to control indoor exposure to Rn.
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Affiliation(s)
- Aline da Rocha Lino
- Rua Martiniano de Carvalho, 965, Bela Vista, São Paul-SP, Brazil, CEP 01321-001
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