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Wójcik-Piotrowicz K, Kaszuba-Zwoińska J, Piszczek P, Nowak B, Guzdek P, Gil K, Rokita E. Low-frequency electromagnetic fields influence the expression of calcium metabolism related proteins in leukocytic cell lines. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 104:104320. [PMID: 37984675 DOI: 10.1016/j.etap.2023.104320] [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: 06/13/2023] [Revised: 11/11/2023] [Accepted: 11/15/2023] [Indexed: 11/22/2023]
Abstract
Our study aimed to verify the hypothesis concerning low-frequency magnetic fields (LF-MFs)-related changes in cell viability through the biomechanism(s) based on calcineurin (CaN)-mediated signaling pathways triggered via ROS-like molecules. For experiments, Mono Mac 6 and U937 leukocytic cell lines were chosen and exposed to various LF-MFs and/or puromycin (PMC). The protein expression level of key regulatory proteins of calcium metabolism was examined by Western Blot analysis. In turn, the reactive oxygen species (ROS) and cell viability parameters were evaluated by cytochrome C reduction assay and flow cytometry, respectively. The simultaneous action of applied MF and PMC influenced cell viability in a MF-dependent manner. The changes in cell viability were correlated with protein expression and ROS levels. It was verified experimentally that applied stress stimuli influence cell susceptibility to undergo cell death. Moreover, the evoked bioeffects might be recognized as specific to both types of leukocyte populations.
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Affiliation(s)
- Karolina Wójcik-Piotrowicz
- Department of Biophysics, Jagiellonian University Medical College, Łazarza street 16, 31-530 Cracow, Poland.
| | - Jolanta Kaszuba-Zwoińska
- Department of Pathophysiology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Piotr Piszczek
- Department of Pathophysiology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Bernadeta Nowak
- Department of Immunology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Piotr Guzdek
- Łukasiewicz Research Network - Institute of Microelectronics and Photonics, Lotników street 32/46, 02-668 Warsaw, Poland
| | - Krzysztof Gil
- Department of Pathophysiology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Eugeniusz Rokita
- Department of Biophysics, Jagiellonian University Medical College, Łazarza street 16, 31-530 Cracow, Poland
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2
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Jang YW, Gil KC, Lee JS, Kang W, Park SY, Hwang KW. T-Cell Differentiation to T Helper 9 Phenotype is Elevated by Extremely Low-Frequency Electromagnetic Fields Via Induction of IL-2 Signaling. Bioelectromagnetics 2019; 40:588-601. [PMID: 31663626 DOI: 10.1002/bem.22219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 08/27/2019] [Indexed: 01/16/2023]
Abstract
Owing to the development of information technology and the electronics industry, and the increase in the use of electronic products, an increasing number of people are exposed to electromagnetic fields (EMFs) in daily life. There has been concern about the effects of EMFs on the human body. Th9 cells, which are characterized by the generation of interleukin-(IL-9), are a recently defined subset of T helper (Th) cells. In this study, we investigated the effect of extremely low-frequency (60 Hz) EMFs, such as those generated by household power sources, at 0.8 mT intensity on CD4+ T cells. The exposure of CD4+ T cells to such EMFs under Th9-polarizing conditions increased IL-9 secretion and gene expression of transcription factors that are important for Th9 development. The expression of GATA3 increased in the early stage, and the phosphorylation of STAT5 and STAT6, which regulate the expression of GATA3, increased. In addition, EMFs increased the expression of IL-2 by the T cells. In conclusion, the differentiation of CD4+ T cells to the Th9 phenotype was increased by exposure to extremely low-frequency EMFs, and this appeared to be dependent on the IL-2 signaling pathway. Furthermore, co-cultures of EMF-exposed Th9 cells and mast cells showed an increased expression of mast cell proteases, FcεR1α, and mast cell-derived inflammatory cytokines compared with co-cultures of non-EMF-exposed Th9 cells and mast cells. Our results suggest that EMFs enhance the differentiation of CD4+ T cells to the Th9 phenotype, resulting in mast cell activation and inflammation. Bioelectromagnetics. 2019;40:588-601. © 2019 Bioelectromagnetics Society.
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Affiliation(s)
- Ye Won Jang
- College of Pharmacy, Chung-Ang University, Seoul, Republic of Korea
| | - Ki Cheol Gil
- College of Pharmacy, Chung-Ang University, Seoul, Republic of Korea
| | - Ji Soo Lee
- College of Pharmacy, Chung-Ang University, Seoul, Republic of Korea
| | - WonKu Kang
- College of Pharmacy, Chung-Ang University, Seoul, Republic of Korea
| | - So-Young Park
- Laboratory of Pharmacognosy, College of Pharmacy, Dankook University, Cheonan, Republic of Korea
| | - Kwang Woo Hwang
- College of Pharmacy, Chung-Ang University, Seoul, Republic of Korea
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3
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Mahaki H, Jabarivasal N, Sardanian K, Zamani A. Effects of Various Densities of 50 Hz Electromagnetic Field on Serum IL-9, IL-10, and TNF-α Levels. THE INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE 2019; 11:24-32. [PMID: 31647056 PMCID: PMC7024597 DOI: 10.15171/ijoem.2020.1572] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 05/26/2019] [Indexed: 12/14/2022]
Abstract
Background: Extremely low-frequency electromagnetic fields (ELF-EMFs) are abundantly produced in modern societies. In recent years, interest in the possible effects of ELF-EMFs on the immune system has progressively increased. Objective: To examine the effects of ELF-EMFs with magnetic flux densities of 1, 100, 500, and 2000 µT on the serum levels of interleukin (IL)-9, IL-10, and tumor necrosis factor-alpha (TNF-α). Methods: 80 adult male rats were exposed to ELF-EMFs at a frequency of 50 Hz for 2 h/day for 60 days. The serum cytokines were measured at two phases of pre- and post-stimulation of the immune system by human serum albumin (HSA). Results: Serum levels of IL-9 and TNF-α, as pro-inflammatory cytokines, were decreased due to 50 Hz EMFs exposure compared with the controls in the pre- and post-stimulation phases. On the contrary, exposures to 1 and 100 µT 50 Hz EMFs increased the levels of antiinflammatory cytokine, and IL-10 only in the pre-stimulation phase. In the post-stimulation phase, the mean level of serum IL-10 was not changed in the experimental groups. Conclusion: The magnetic flux densities of 1 and 100 µT 50 Hz EMFs had more immunological effects than EMFs with higher densities. Exposure to 50 Hz EMFs may activate anti-inflammatory effects in rats, by down-modulation of pro-inflammatory cytokines (IL-9 and TNF-α) and induction of the anti-inflammatory cytokine (IL-10).
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Affiliation(s)
- Hanie Mahaki
- Department of Immunology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran; and Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Naghi Jabarivasal
- Department of Medical Physics, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Khosro Sardanian
- Department of Immunology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran; and Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Zamani
- Department of Immunology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran; and Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran. .,Molecular Immunology Research Group, Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
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Hosseinabadi MB, Khanjani N, Samaei SE, Nazarkhani F. Effect of long-term occupational exposure to extremely low-frequency electromagnetic fields on proinflammatory cytokine and hematological parameters. Int J Radiat Biol 2019; 95:1573-1580. [DOI: 10.1080/09553002.2019.1642542] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Narges Khanjani
- Environmental Health Engineering Research Centre, Kerman University of Medical Sciences, Kerman, Iran
| | - Seyed Ehsan Samaei
- Department of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Fereshteh Nazarkhani
- Department of Occupational Health Engineering, School of Health, Mazandaran University of Medical Sciences, Mazandaran, Iran
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Sun Y, Huang X, Wang Y, Shi Z, Liao Y, Cai P. Lipidomic alteration and stress-defense mechanism of soil nematode Caenorhabditis elegans in response to extremely low-frequency electromagnetic field exposure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 170:611-619. [PMID: 30579161 DOI: 10.1016/j.ecoenv.2018.11.137] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/14/2018] [Accepted: 11/30/2018] [Indexed: 06/09/2023]
Abstract
To assess the impacts of man-made extremely low-frequency electromagnetic field (ELF-EMF) on soil ecosystems, the soil nematode was applied as a biological indicator to characterize ecotoxicity of ELF-EMF. In this paper, a soil-living model organism, Caenorhabditis elegans (C. elegans) was exposed to 50 Hz, 3 mT ELF-EMF. The integrated lipidome, proteome and transcriptome analysis were applied to elucidate physiological acclimations. Lipidomic analysis showed that ELF-EMF exposure induced significant alterations of 64 lipids, including significant elevation of triacylglycerols (TGs). Proteome results implied 157 changed protein expressions under ELF-EMF exposure. By transcriptomic analysis, 456 differently expressed genes were identified. Gene Ontology (GO) function and pathway analyses showed lipidomic alteration, mitochondrial dysfunction and the stress defense responses following ELF-EMF exposure in C. elegans. Conjoint analysis of proteome and transcriptome data showed that a higher expression of genes (sip-1, mtl-1 and rpl-11.1, etc.) were involved in stress defense responses to ELF-EMF exposure. These results indicated that ELF-EMF can induce effects on soil nematodes, mainly through disturbing lipid metabolism such as increasing TGs content, and eliciting stress defense responses. This study provided a new understanding in ELF-EMF exposure effects on soil nematodes and suggested a potential way of interpreting ELF-EMF influences on soil ecosystems.
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Affiliation(s)
- Yongyan Sun
- Physical Environment Group, Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, PR China; University of Chinese Academy of Sciences, Beijing, PR China; Xiamen Key Laboratory of Physical Environment, Xiamen, PR China
| | - Xiaomei Huang
- Physical Environment Group, Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, PR China; University of Chinese Academy of Sciences, Beijing, PR China; Xiamen Key Laboratory of Physical Environment, Xiamen, PR China
| | - Yahong Wang
- Physical Environment Group, Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, PR China; University of Chinese Academy of Sciences, Beijing, PR China; Xiamen Key Laboratory of Physical Environment, Xiamen, PR China
| | - Zhenhua Shi
- University of Chinese Academy of Sciences, Beijing, PR China; Environmental Bioelectrochemistry Center, Fujian Agriculture and Forestry University, Fuzhou, PR China
| | - Yanyan Liao
- Physical Environment Group, Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, PR China; University of Chinese Academy of Sciences, Beijing, PR China; Xiamen Key Laboratory of Physical Environment, Xiamen, PR China
| | - Peng Cai
- Physical Environment Group, Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, PR China; Xiamen Key Laboratory of Physical Environment, Xiamen, PR China; Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, PR China.
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Mahaki H, Tanzadehpanah H, Jabarivasal N, Sardanian K, Zamani A. A review on the effects of extremely low frequency electromagnetic field (ELF-EMF) on cytokines of innate and adaptive immunity. Electromagn Biol Med 2018; 38:84-95. [PMID: 30518268 DOI: 10.1080/15368378.2018.1545668] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Extremely low frequency electromagnetic field (ELF-EMF) is produced extensively in modern technologies. Numerous in vitro and in vivo studies have shown that ELF-EMF has both stimulatory and inhibitory effects on the immune system response. This review was conducted on effects of ELF-EMF on cytokines of innate and adaptive immunity. Mechanisms of ELF-EMF, which may modulate immune cell responses, were also studied. Physical and biological parameters of ELF-EMF can interact with each other to create beneficial or harmful effect on the immune cell responses by interfering with the inflammatory or anti-inflammatory cytokines. According to the studies, it is supposed that short-term (2-24 h/d up to a week) exposure of ELF-EMF with strong density may increase innate immune response due to an increase of innate immunity cytokines. Furthermore, long-term (2-24 h/d up to 8 years) exposure to low-density ELF-EMF may cause a decrease in adaptive immune response, especially in Th1 subset.
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Affiliation(s)
- Hanie Mahaki
- a Department of Immunology, School of Medicine , Hamadan University of Medical Sciences , Hamadan , Iran.,b Research Center for Molecular Medicine , Hamadan University of Medical Sciences , Hamadan , Iran
| | - Hamid Tanzadehpanah
- b Research Center for Molecular Medicine , Hamadan University of Medical Sciences , Hamadan , Iran
| | - Naghi Jabarivasal
- c Department of Medical Physics , Hamadan University of Medical Sciences , Hamadan , Iran
| | - Khosro Sardanian
- a Department of Immunology, School of Medicine , Hamadan University of Medical Sciences , Hamadan , Iran.,b Research Center for Molecular Medicine , Hamadan University of Medical Sciences , Hamadan , Iran
| | - Alireza Zamani
- a Department of Immunology, School of Medicine , Hamadan University of Medical Sciences , Hamadan , Iran.,d Molecular Immunology Research Group, Research Center for Molecular Medicine , Hamadan University of Medical Sciences , Hamadan , Iran
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Wyszkowska J, Jędrzejewski T, Piotrowski J, Wojciechowska A, Stankiewicz M, Kozak W. Evaluation of the influence of in vivo exposure to extremely low-frequency magnetic fields on the plasma levels of pro-inflammatory cytokines in rats. Int J Radiat Biol 2018; 94:909-917. [DOI: 10.1080/09553002.2018.1503428] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Joanna Wyszkowska
- Department of Biophysics, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Toruń, Poland
| | - Tomasz Jędrzejewski
- Department of Immunology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Toruń, Poland
| | - Jakub Piotrowski
- Department of Immunology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Toruń, Poland
| | - Anna Wojciechowska
- Chair of Geobotany and Landscape Planning, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Toruń, Poland
| | - Maria Stankiewicz
- Department of Biophysics, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Toruń, Poland
| | - Wieslaw Kozak
- Department of Immunology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Toruń, Poland
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Li H, Lin L, Li L, Zhou L, Hao S, Zhang Y, Ding Z. Eotaxin‑1 and MCP‑1 serve as circulating indicators in response to power frequency electromagnetic field exposure in mice. Mol Med Rep 2018; 18:2832-2840. [PMID: 30015948 PMCID: PMC6102701 DOI: 10.3892/mmr.2018.9237] [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: 10/24/2017] [Accepted: 06/12/2018] [Indexed: 11/25/2022] Open
Abstract
The increasing public concern regarding the potential health risks of exposure to electromagnetic fields (EMFs) has led to intensive research in this area. However, it remains unclear whether potential pro-oncogenic effects may be caused by power frequency EMF (PFEMF) exposure. To address the associated risk factors, the present study exposed 4-week old Balb/c mice to 0, 0.1, 0.5 and 2.5 mT of constant 50 Hz Helmholtz coil-type PFEMF for 90 days to explore the circulating chemokine indicators that may be associated with inflammation or cancer. No measurable weight difference existed between the control and PFEMF-exposure groups; however, the Luminex assay clearly demonstrated differentially responsive profiles of circulating chemokines upon PFEMF treatment. Monocyte chemoattractant protein (MCP)-3, macrophage inflammatory protein (MIP)-1α, MIP-1β and MIP-2 levels in serum were not significantly altered by PFEMF during the 3-month exposure period; however, the circulating levels of other chemokines including IP-10, GROα, RANTES, EOTAXIN-1 and MCP-1 exhibited significant changes upon treatment. Among the responsive chemokines, EOTAXIN-1 and MCP-1 were significantly increased by 0.5 mT of PFEMF treatment, which may support their use as indicators of PFEMF exposure. This novel finding highlights the potential pro-inflammatory nature of power frequency, which may shed light on the mechanisms underlying PFEMF-induced diseases, including cancer.
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Affiliation(s)
- Hualiang Li
- Institute of Environmental Protection, Guangdong Power Grid, Guangzhou, Guangdong 510080, P.R. China
| | - Lin Lin
- Department of Obstetrics, The Sixth Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510655, P.R. China
| | - Li Li
- Institute of Environmental Protection, Guangdong Power Grid, Guangzhou, Guangdong 510080, P.R. China
| | - Liang Zhou
- Department of Radiation Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Shuai Hao
- Department of Radiation Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Ying Zhang
- Department of Radiation Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Zhenhua Ding
- Department of Radiation Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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López-Furelos A, Salas-Sánchez AA, Ares-Pena FJ, Leiro-Vidal JM, López-Martín E. Exposure to radiation from single or combined radio frequencies provokes macrophage dysfunction in the RAW 264.7 cell line. Int J Radiat Biol 2018; 94:607-618. [PMID: 29659305 DOI: 10.1080/09553002.2018.1465610] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
PURPOSE The aim of this study was to determine whether exposure to radiation from single or multiple radio-frequency (RF) signals at 900 and 2450 MHz would induce effects in the RAW 264.7 cell line. MATERIALS AND METHODS Cell cultures were exposed to single or combined RF for 4, 24, 48, or 72 h in a GTEM electromagnetic test chamber. At the end of the radiation exposure time, viability and cell growth were analyzed by flow cytometry, nitric oxide (NO) production was measured by colorimetry, the expression of HSP70 and TNF-α was ascertained by qPCR, and the phagocytic activity was observed by microscopy. RESULTS NO production increased after 48 h exposure at 2450 MHz, compared with controls. The group subjected to the combined interaction of two RFs showed an increase of HSP70 after 48 h exposure and a significant increase of NO and TNF-α after 72 h. The phagocytic activity of macrophages decreased in all groups as exposure time increased. CONCLUSIONS Our results indicated a decrease in phagocytic activity and an increase in inflammatory, cytoprotective, and cytotoxic responses in macrophages after continuous and combined exposure of multiple RF signals. Multiple RF interact in everyday life, the immune response in humans is unknown.
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Affiliation(s)
- Alberto López-Furelos
- a Department of Morphological Sciences , University of Santiago de Compostela , Santiago de Compostela , Spain
| | - Aarón A Salas-Sánchez
- b Department of Applied Physics , University of Santiago de Compostela , Santiago de Compostela , Spain
| | - Francisco J Ares-Pena
- b Department of Applied Physics , University of Santiago de Compostela , Santiago de Compostela , Spain
| | - José M Leiro-Vidal
- c Institute of Alimentary Analysis , University of Santiago de Compostela , Santiago de Compostela , Spain
| | - Elena López-Martín
- a Department of Morphological Sciences , University of Santiago de Compostela , Santiago de Compostela , Spain
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10
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Li H, Lin L, Li L, Zhou L, Zhang Y, Hao S, Ding Z. Exosomal small RNA sequencing uncovers the microRNA dose markers for power frequency electromagnetic field exposure. Biomarkers 2018; 23:315-327. [PMID: 29297241 DOI: 10.1080/1354750x.2018.1423707] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
PURPOSE The potential health risks caused by power frequency electromagnetic field (PFEMF) have led to increase public health concerns. However, the diagnosis and prognosis remain challenging in determination of exact dose of PFEMF exposure. MATERIALS AND METHODS Mice were exposed to different magnetic doses of PFEMF for the following isolation of serum exosomes, microRNAs (miRNAs) extraction and small RNA sequencing. After small RNA sequencing, bioinformatic analysis, quantitative real-time PCR (qRT-PCR) validation and serum exosomal miRNA biomarkers were determined. RESULTS Significantly changed serum exosomal miRNA as biomarkers of 0.1, 0.5, 2.5 mT and common PFEMF exposure were confirmed. Gene ontology (GO) and Kyoto encyclopaedia of genes and genomes (KEGG) pathway analysis of the downstream target genes of the above-identified exosomal miRNA markers indicated that, exosomal miRNA markers were predicted to be involved in critical pathophysiological processes of neural system and cancer- or other disease-related signalling pathways. CONCLUSIONS Aberrantly-expressed serum exosomal miRNAs, including miR-128-3p for 0.1 mT, miR-133a-3p for 0.5 mT, miR-142a-5p for 2.5 mT, miR-218-5p and miR-199a-3p for common PFEMF exposure, suggested a series of informative markers for not only identifying the exact dose of PFEMF exposure, also consolidating the base for future clinical intervention.
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Affiliation(s)
- Hualiang Li
- a Electric Power Research Institute of Guangdong Power Grid , Guangzhou , PR China
| | - Lin Lin
- b Department of Obstetrics , The Sixth Affiliated Hospital of Sun Yat-sen University , Guangzhou , PR China
| | - Li Li
- a Electric Power Research Institute of Guangdong Power Grid , Guangzhou , PR China
| | - Liang Zhou
- c Department of Radiation Medicine, School of Public Health, Guangdong Provincial Key Laboratory of Tropical Disease Research , Southern Medical University , Guangzhou , PR China
| | - Ying Zhang
- c Department of Radiation Medicine, School of Public Health, Guangdong Provincial Key Laboratory of Tropical Disease Research , Southern Medical University , Guangzhou , PR China
| | - Shuai Hao
- c Department of Radiation Medicine, School of Public Health, Guangdong Provincial Key Laboratory of Tropical Disease Research , Southern Medical University , Guangzhou , PR China
| | - Zhenhua Ding
- c Department of Radiation Medicine, School of Public Health, Guangdong Provincial Key Laboratory of Tropical Disease Research , Southern Medical University , Guangzhou , PR China
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11
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de Kleijn S, Ferwerda G, Wiese M, Trentelman J, Cuppen J, Kozicz T, de Jager L, Hermans PWM, Verburg-van Kemenade BML. A short-term extremely low frequency electromagnetic field exposure increases circulating leukocyte numbers and affects HPA-axis signaling in mice. Bioelectromagnetics 2016; 37:433-43. [PMID: 27553635 PMCID: PMC5129481 DOI: 10.1002/bem.21998] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 07/20/2016] [Indexed: 01/04/2023]
Abstract
There is still uncertainty whether extremely low frequency electromagnetic fields (ELF‐EMF) can induce health effects like immunomodulation. Despite evidence obtained in vitro, an unambiguous association has not yet been established in vivo. Here, mice were exposed to ELF‐EMF for 1, 4, and 24 h/day in a short‐term (1 week) and long‐term (15 weeks) set‐up to investigate whole body effects on the level of stress regulation and immune response. ELF‐EMF signal contained multiple frequencies (20–5000 Hz) and a magnetic flux density of 10 μT. After exposure, blood was analyzed for leukocyte numbers (short‐term and long‐term) and adrenocorticotropic hormone concentration (short‐term only). Furthermore, in the short‐term experiment, stress‐related parameters, corticotropin‐releasing hormone, proopiomelanocortin (POMC) and CYP11A1 gene‐expression, respectively, were determined in the hypothalamic paraventricular nucleus, pituitary, and adrenal glands. In the short‐term but not long‐term experiment, leukocyte counts were significantly higher in the 24 h‐exposed group compared with controls, mainly represented by increased neutrophils and CD4 ± lymphocytes. POMC expression and plasma adrenocorticotropic hormone were significantly lower compared with unexposed control mice. In conclusion, short‐term ELF‐EMF exposure may affect hypothalamic‐pituitary‐adrenal axis activation in mice. Changes in stress hormone release may explain changes in circulating leukocyte numbers and composition. Bioelectromagnetics. 37:433–443, 2016. © 2016 The Authors. Bioelectromagnetics Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Stan de Kleijn
- Laboratory of Pediatric Infectious Diseases, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Gerben Ferwerda
- Laboratory of Pediatric Infectious Diseases, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Michelle Wiese
- Faculty of Health and Environmental Sciences, Central University of Technology, Free State, Bloemfontein, South Africa
| | - Jos Trentelman
- Cell Biology and Immunology Group, Department of Animal Sciences, Wageningen University, Wageningen, The Netherlands
| | - Jan Cuppen
- Immunent B.V. and Neiding B.V., Veldhoven, The Netherlands
| | - Tamas Kozicz
- Faculty of Science, Department of Cellular Animal Physiology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Linda de Jager
- Faculty of Health and Environmental Sciences, Central University of Technology, Free State, Bloemfontein, South Africa
| | - Peter W M Hermans
- Laboratory of Pediatric Infectious Diseases, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - B M Lidy Verburg-van Kemenade
- Cell Biology and Immunology Group, Department of Animal Sciences, Wageningen University, Wageningen, The Netherlands.
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12
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Mattsson MO, Simkó M. Grouping of Experimental Conditions as an Approach to Evaluate Effects of Extremely Low-Frequency Magnetic Fields on Oxidative Response in in vitro Studies. Front Public Health 2014; 2:132. [PMID: 25229055 PMCID: PMC4151017 DOI: 10.3389/fpubh.2014.00132] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 08/19/2014] [Indexed: 11/13/2022] Open
Abstract
A large body of literature deals with biological effects of extremely low-frequency magnetic fields (ELF MFs) studied in vitro. Despite the multitude of studies, no coherent picture has evolved regarding the plausibility of effects at low-flux densities or regarding the interaction mechanisms. Here, we propose that ELF MF exposure in vitro causes changes in oxidative status as an early response. We tested this hypothesis by scrutinizing the literature and applying a grouping approach for analyzing relevant biological properties and exposure conditions. A total of 41 scientific original publications were analyzed for this purpose. The conclusion from the work is that ELF MF (modulated or unmodulated) consistently can influence the oxidative status, at or above 1 mT, in a broad range of cell types and independent of exposure duration. A response at lower flux densities is seen in certain studies, although not consistently. Further studies with stringent protocols for sham exposure, blinding, and statistical analysis as well as appropriate positive controls are needed to establish if true dose-relationships for effects on oxidative status exist.
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Affiliation(s)
- Mats-Olof Mattsson
- Environmental Resources and Technologies, Department Health and Environment, AIT Austrian Institute of Technology, Tulln, Austria
| | - Myrtill Simkó
- Environmental Resources and Technologies, Department Health and Environment, AIT Austrian Institute of Technology, Tulln, Austria
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D'Angelo C, Costantini E, Kamal MA, Reale M. Experimental model for ELF-EMF exposure: Concern for human health. Saudi J Biol Sci 2014; 22:75-84. [PMID: 25561888 DOI: 10.1016/j.sjbs.2014.07.006] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 07/16/2014] [Accepted: 07/17/2014] [Indexed: 11/29/2022] Open
Abstract
Low frequency (LF) electromagnetic fields (EMFs) are abundantly present in modern society and in the last 20 years the interest about the possible effect of extremely low frequency (ELF) EMFs on human health has increased progressively. Epidemiological studies, designed to verify whether EMF exposure may be a potential risk factor for health, have led to controversial results. The possible association between EMFs and an increased incidence of childhood leukemia, brain tumors or neurodegenerative diseases was not fully elucidated. On the other hand, EMFs are widely used, in neurology, psychiatry, rheumatology, orthopedics and dermatology, both in diagnosis and in therapy. In vitro studies may help to evaluate the mechanism by which LF-EMFs affect biological systems. In vitro model of wound healing used keratinocytes (HaCaT), neuroblastoma cell line (SH-SY5Y) as a model for analysis of differentiation, metabolism and functions related to neurodegenerative processes, and monocytic cell line (THP-1) was used as a model for inflammation and cytokines production, while leukemic cell line (K562) was used as a model for hematopoietic differentiation. MCP-1, a chemokine that regulates the migration and infiltration of memory T cells, natural killer (NK), monocytes and epithelial cells, has been demonstrated to be induced and involved in various diseases. Since, varying the parameters of EMFs different effects may be observed, we have studied MCP-1 expression in HaCaT, SH-SY5Y, THP-1 and K562 exposed to a sinusoidal EMF at 50 Hz frequency with a flux density of 1 mT (rms). Our preliminary results showed that EMF-exposure differently modifies the expression of MCP-1 in different cell types. Thus, the MCP-1 expression needs to be better determined, with additional studies, with different parameters and times of exposure to ELF-EMF.
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Affiliation(s)
- C D'Angelo
- Dept. Experimental and Clinical Sciences, Immunodiagnostic and Molecular Pathology Section, University "G. d'Annunzio" Chieti-Pescara, Italy
| | - E Costantini
- Dept. Experimental and Clinical Sciences, Immunodiagnostic and Molecular Pathology Section, University "G. d'Annunzio" Chieti-Pescara, Italy
| | - M A Kamal
- King Fahd Medical Research Center, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia
| | - M Reale
- Dept. Experimental and Clinical Sciences, Immunodiagnostic and Molecular Pathology Section, University "G. d'Annunzio" Chieti-Pescara, Italy
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Touitou Y, Djeridane Y, Lambrozo J, Camus F, Selmaoui B. Long-term (up to 20 years) effects of 50-Hz magnetic field exposure on immune system and hematological parameters in healthy men. Clin Biochem 2013; 46:59-63. [DOI: 10.1016/j.clinbiochem.2012.09.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 09/07/2012] [Accepted: 09/10/2012] [Indexed: 11/30/2022]
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15
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Salehi I, Sani KG, Zamani A. Exposure of rats to extremely low-frequency electromagnetic fields (ELF-EMF) alters cytokines production. Electromagn Biol Med 2012; 32:1-8. [PMID: 23046051 DOI: 10.3109/15368378.2012.692343] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Investigations indicate a potential link between exposure to extremely low-frequency electromagnetic field (ELF-EMF) and some cancers. Carcinogenesis of ELF-EMF may be mediated by effect on the immune system. During an immune response, naïve T cells differentiate to effector type 1 helper T cells (T(H)1), T(H)2, or T(H)17 subsets according to existence of different cytokines and T(H)1 is important in defense against tumors. Therefore, it will be reasonable to test whether ELF-EMF can change cytokines like interferon gamma (IFN-γ), interleukin-4 (IL-4), IL-6, and IL-12 that regulate T(H)1/T(H)2/T(H)17 balance. Forty adult male rats were randomly separated into ELF-EMF-exposed and sham-exposed control groups. The ELF-EMF group was exposed to a flux density of 100 μT, frequency 50 Hz, 2 h/day for 3 months. The controls were placed in identical chamber without ELF-EMF. The results showed there were no significant differences between the mean mass of rats, thymuses, and spleens in ELF-EMF exposed group compared with controls. Serum IL-12 level was decreased from 418 ± 47 pg/ml in controls to 300 ± 23 pg/ml (p < 0.05) in ELF-EMF-exposed group. Phytohemagglutinin activated of in vitro production of IL-6 by the whole spleen culture (1356 ± 92 pg/ml) and total blood culture (418 ± 40 pg/ml) of ELF-EMF-exposed rats were higher (p < 0.001) comparing with controls (905 ± 74 pg/ml), (182 ± 26 pg/ml), respectively. However, the levels of IFN-γ, IL-4, and IL-6 of serum and IFN-γ, IL-4, and IL-12 in spleen culture and total blood culture of two groups were not significantly different. It seems that ELF-EMF may change T(H)1/T(H)2/T(H)17 balance toward down regulation of T(H)1 and upregulation T(H)17 type responses.
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Affiliation(s)
- Iraj Salehi
- Department of Physiology, School of Paramedical Sciences, Hamadan University of Medical Sciences , Hamadan , Iran
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16
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Alghamdi MS, El-Ghazaly NA. Effects of Exposure to Electromagnetic Field on of Some Hematological Parameters in Mice. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/ojmc.2012.22005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Hwang YH, Song HS, Kim HR, Ko MS, Jeong JM, Kim YH, Ryu JS, Sohn UD, Gimm YM, Myung SH, Sim SS. Intracellular Ca Mobilization and Beta-hexosaminidase Release Are Not Influenced by 60 Hz-electromagnetic Fields (EMF) in RBL 2H3 Cells. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2011; 15:313-7. [PMID: 22128265 DOI: 10.4196/kjpp.2011.15.5.313] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 10/15/2011] [Accepted: 10/21/2011] [Indexed: 11/15/2022]
Abstract
The effects of extremely low frequency electromagnetic fields (EMF) on intracellular Ca(2+) mobilization and cellular function in RBL 2H3 cells were investigated. Exposure to EMF (60 Hz, 0.1 or 1 mT) for 4 or 16 h did not produce any cytotoxic effects in RBL 2H3 cells. Melittin, ionomycin and thapsigargin each dose-dependently increased the intracellular Ca(2+) concentration. The increase of intracellular Ca(2+) induced by these three agents was not affected by exposure to EMF (60 Hz, 1 mT) for 4 or 16 h in RBL 2H3 cells. To investigate the effect of EMF on exocytosis, we measured beta-hexosaminidase release in RBL 2H3 cells. Basal release of beta-hexosaminidase was 12.3±2.3% in RBL 2H3 cells. Exposure to EMF (60 Hz, 0.1 or 1 mT) for 4 or 16 h did not affect the basal or 1 µM melittin-induced beta-hexosaminidase release in RBL 2H3 cells. This study suggests that exposure to EMF (60 Hz, 0.1 or 1 mT), which is the limit of occupational exposure, has no influence on intracellular Ca(2+) mobilization and cellular function in RBL 2H3 cells.
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Affiliation(s)
- Yeon Hee Hwang
- College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea
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18
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Bouwens M, de Kleijn S, Ferwerda G, Cuppen JJ, Savelkoul HF, Kemenade BLVV. Low-frequency electromagnetic fields do not alter responses of inflammatory genes and proteins in human monocytes and immune cell lines. Bioelectromagnetics 2011; 33:226-37. [DOI: 10.1002/bem.20695] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 07/06/2011] [Indexed: 12/18/2022]
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Selmaoui B, Lambrozo J, Sackett-Lundeen L, Haus E, Touitou Y. Acute Exposure to 50-Hz Magnetic Fields Increases Interleukin-6 in Young Healthy Men. J Clin Immunol 2011; 31:1105-11. [DOI: 10.1007/s10875-011-9558-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Accepted: 06/10/2011] [Indexed: 10/18/2022]
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20
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Extremely low frequency electromagnetic field exposure does not modulate toll-like receptor signaling in human peripheral blood mononuclear cells. Cytokine 2011; 54:43-50. [DOI: 10.1016/j.cyto.2010.12.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 11/08/2010] [Accepted: 12/18/2010] [Indexed: 01/23/2023]
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21
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Santini MT, Rainaldi G, Indovina PL. Cellular effects of extremely low frequency (ELF) electromagnetic fields. Int J Radiat Biol 2009; 85:294-313. [PMID: 19399675 DOI: 10.1080/09553000902781097] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE The major areas of research that have characterised investigation of the impact of extremely low frequency (ELF) electromagnetic fields on living systems in the past 50 years are discussed. In particular, selected studies examining the role of these fields in cancer, their effects on immune and nerve cells, and the positive influence of these ELF fields on bone and nerve cells, wound healing and ischemia/reperfusion injury are explored. CONCLUSIONS The literature indicates that there is still no general agreement on the exact biological detrimental effects of ELF fields, on the physical mechanisms that may be behind these effects or on the extent to which these effects may be harmful to humans. Nonetheless, the majority of the in vitro experimental results indicate that ELF fields induce numerous types of changes in cells. Whether or not the perturbations observed at the cellular level can be directly extrapolated to negative effects in humans is still unknown. However, the myriad of effects that ELF fields have on biological systems should not be ignored when evaluating risk to humans from these fields and, consequently, in passing appropriate legislation to safeguard both the general public and professionally-exposed workers. With regard to the positive effects of these fields, the possibility of testing further their efficacy in therapeutic protocols should also not be overlooked.
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Affiliation(s)
- Maria T Santini
- Dipartimento di Ematologia, Oncologia e Medicina Molecolare, Istituto Superiore di Sanita, Viale Regina Elena, Rome.
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Vianale G, Reale M, Amerio P, Stefanachi M, Di Luzio S, Muraro R. Extremely low frequency electromagnetic field enhances human keratinocyte cell growth and decreases proinflammatory chemokine production. Br J Dermatol 2008; 158:1189-96. [DOI: 10.1111/j.1365-2133.2008.08540.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Johansson A, Forsgren S, Stenberg B, Wilén J, Kalezic N, Sandström M. No effect of mobile phone-like RF exposure on patients with atopic dermatitis. Bioelectromagnetics 2008; 29:353-62. [DOI: 10.1002/bem.20402] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Boscolo P, Di Gioacchino M, Di Giampaolo L, Antonucci A, Di Luzio S. Combined effects of electromagnetic fields on immune and nervous responses. Int J Immunopathol Pharmacol 2007; 20:59-63. [PMID: 17903359 DOI: 10.1177/03946320070200s212] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
In technologically developed countries, there is concern about hazards from electromagnetic fields (EMFs). Several studies have reported that immune and neuroendocrine systems exert an integrated response to EMF exposure. The aim of this review is to summarize the results of studies on the effect of low and high frequency EMF on immune and neuroendocrine systems on which our research group has been working for several years.
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Affiliation(s)
- P Boscolo
- Occupational Medicine,G. d'Annunzio University of Chieti and Pescara, Chieti, Italy.
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Bertolino G, de Freitas Braga A, de Oliveira Lima do Couto Rosa K, de Brito Junior LC, de Araujo JE. Macroscopic and histological effects of magnetic field exposition in the process of tissue reparation in Wistar rats. Arch Dermatol Res 2006; 298:121-6. [PMID: 16773313 DOI: 10.1007/s00403-006-0667-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2005] [Revised: 01/16/2006] [Accepted: 05/05/2006] [Indexed: 10/24/2022]
Abstract
Exposing body tissue, in vivo, to a magnetic field promotes metabolic alterations in the cell membrane's permeability and in the apoptosis phenomenon. This aim of the study was to investigate magnetic field interactions in the process of tissue repair in rats. Twenty-four male Wistar rats, weighing 200-350 g, were assigned to one of the three different groups: Control (without exposure to the magnetic field), South Pole (with exposure to the South magnetic field), and North Pole (with exposure to the north magnetic field). The intensity of the magnetic field used was 1,600 G. All the animals were anesthetized and immobilized on a surgical board in order to receive circular wounds. The size of the wounds was measured by a milimetric paquimeter. For the histological study, the tissues were fixed in paraffin and colored with hematoxylin and eosin. Wound size data were submitted to one-way analysis of variance (ANOVA) and to the test of Student-Newman-Keuls when appropriated. The results of day 5 (F (2,23):F (3,84); P < 0.05), day 10 (F (2,23):F (8,89); P < 0.05), and day 15 (F (2,23):F (7,88); P < 0.05) revealed a significant reduction between the size of the wounds of both North and South groups when compared to Control group. Our data suggest that chronic exposure to a magnetic field of 1,600 G can accelerate the speed of tissue repair in rats.
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Affiliation(s)
- Guilherme Bertolino
- Graduation Program in Physiotherapy, University of Franca, Sao Paulo, Brazil
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Capri M, Mesirca P, Remondini D, Carosella S, Pasi S, Castellani G, Franceschi C, Bersani F. 50 Hz sinusoidal magnetic fields do not affect human lymphocyte activation and proliferationin vitro. Phys Biol 2004; 1:211-9. [PMID: 16204841 DOI: 10.1088/1478-3967/1/4/003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In the last 30 years, an increasing public concern about the possible harmful effects of electromagnetic fields generated by power lines and domestic appliances has pushed the scientific community to search for a correct and comprehensive answer to this problem. In this work the effects of exposure to 50 Hz sinusoidal magnetic fields, with a magnetic flux density of 0.05 mT and 2.5 mT (peak values), were studied on human peripheral blood mononuclear cells (PBMCs) collected from healthy young and elderly donors. Cell activation and proliferation were investigated by using flow cytometry techniques and 3H-TdR incorporation assays, respectively. The results obtained indicated that exposure to the fields altered neither DNA synthesis nor the capacity of lymphocytes to enter the activation phase and progress into the cell cycle. Thus, the conclusions are that two important functional phases of human lymphocytes, such as activation and proliferation, are not affected by exposures to 50 Hz magnetic fields similar to those found under power lines.
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Affiliation(s)
- Miriam Capri
- Department of Experimental Pathology, Via S Giacomo 12, University of Bologna, 40126 Bologna, Italy
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Lange S, Viergutz T, Simkó M. Modifications in cell cycle kinetics and in expression of G1 phase-regulating proteins in human amniotic cells after exposure to electromagnetic fields and ionizing radiation. Cell Prolif 2004; 37:337-49. [PMID: 15377333 PMCID: PMC6496295 DOI: 10.1111/j.1365-2184.2004.00317.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Low-frequency electromagnetic fields are suspected of being involved in carcinogenesis, particularly in processes that could be related to cancer promotion. Because development of cancer is associated with deregulated cell growth and we previously observed a magnetic field-induced decrease in DNA synthesis [Lange et al. (2002) Alterations in the cell cycle and in the protein level of cyclin D1p, 21CIP1, and p16INK4a after exposure to 50 HZ. MF in human cells. Radiat. Environ. Biophys.41, 131], this study aims to document the influence of 50 Hz, 1 mT magnetic fields (MF), with or without initial gamma-ionizing radiation (IR), on the following cell proliferation-relevant parameters in human amniotic fluid cells (AFC): cell cycle distribution, expression of the G1 phase-regulating proteins Cdk4, cyclin D1, p21CIP1 and p16INK4a, and Cdk4 activity. While IR induced a G1 delay and a dose-dependent G2 arrest, no discernible changes in cell cycle kinetics were observed due to MF exposure. However, a significant decrease in the protein expression of cyclin D1 and an increase in p21CIP1- and p16INK4a-expression could be detected after exposure to MF alone. IR-exposure caused an augmentation of p21CIP1- and p16INK4a- levels as well, but did not alter cyclin D1 expression. A slight diminution of Cdk4 activity was noticed after MF exposure only, indicating that Cdk4 appears not to act as a mediator of MF- or IR-induced changes in the cell cycle of AFC cells. Co-exposure to MF/IR affected neither cell cycle distribution nor protein expression or kinase activity additionally or synergistically, and therefore MF seems not to modify the mutagenic potency of IR.
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Affiliation(s)
- S Lange
- Research Centre Rossendorf, Institute of Bioinorganic and Radiopharmaceutical Chemistry, Dresden, Germany
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