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López de Mingo I, Rivera González MX, Maestú Unturbe C. The Cellular Response Is Determined by a Combination of Different ELF-EMF Exposure Parameters: A Scope Review. Int J Mol Sci 2024; 25:5074. [PMID: 38791113 PMCID: PMC11121623 DOI: 10.3390/ijms25105074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
Since the establishment of regulations for exposure to extremely low-frequency (0-300) Hz electromagnetic fields, scientific opinion has prioritised the hypothesis that the most important parameter determining cellular behaviour has been intensity, ignoring the other exposure parameters (frequency, time, mode, waveform). This has been reflected in the methodologies of the in vitro articles published and the reviews in which they are included. A scope review was carried out, grouping a total of 79 articles that met the proposed inclusion criteria and studying the effects of the different experiments on viability, proliferation, apoptosis, oxidative stress and the cell cycle. These results have been divided and classified by frequency, intensity, exposure time and exposure mode (continuous/intermittent). The results obtained for each of the processes according to the exposure parameter used are shown graphically to highlight the importance of a good methodology in experimental development and the search for mechanisms of action that explain the experimental results, considering not only the criterion of intensity. The consequence of this is a more than necessary revision of current exposure protection regulations for the general population based on the reductionist criterion of intensity.
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Affiliation(s)
- Isabel López de Mingo
- Centro de Tecnología Biomédica (CTB), Universidad Politécnica de Madrid (UPM), 28223 Madrid, Spain; (I.L.d.M.); (M.-X.R.G.)
- Escuela Técnica Superior de Ingenieros de Telecomunicación (ETSIT), Universidad Politécnica de Madrid (UPM), 28040 Madrid, Spain
| | - Marco-Xavier Rivera González
- Centro de Tecnología Biomédica (CTB), Universidad Politécnica de Madrid (UPM), 28223 Madrid, Spain; (I.L.d.M.); (M.-X.R.G.)
- Escuela Técnica Superior de Ingenieros Informáticos (ETSIINF), Universidad Politécnica de Madrid (UPM), 28223 Madrid, Spain
| | - Ceferino Maestú Unturbe
- Centro de Tecnología Biomédica (CTB), Universidad Politécnica de Madrid (UPM), 28223 Madrid, Spain; (I.L.d.M.); (M.-X.R.G.)
- Escuela Técnica Superior de Ingenieros de Telecomunicación (ETSIT), Universidad Politécnica de Madrid (UPM), 28040 Madrid, Spain
- Centro de Investigación en Red—Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
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2
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Rivera González MX, López de Mingo I, Amuneke Ramírez A, Maestú Unturbe C. Design and characterisation of a cell exposure system with high magnetic field homogeneity: RILZ coils. Front Bioeng Biotechnol 2024; 12:1337899. [PMID: 38524191 PMCID: PMC10957649 DOI: 10.3389/fbioe.2024.1337899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 02/27/2024] [Indexed: 03/26/2024] Open
Abstract
In vitro studies requiring controlled exposure to low-frequency electromagnetic fields employ exposure systems with different geometries and configurations, the Helmholtz configuration being one of the most widely used. This configuration has limitations in the homogeneity of the spatial distribution of the magnetic field intensity values. We present the design, manufacturing, and characterisation of a new coil system, called RILZ configuration, which improves the distribution of magnetic field intensity values in the three dimensions of space for three different heights in comparison with the traditional circular coils in Helmholtz configuration. In addition, a comparative study of the cellular response in CT2A cultures exposed to a magnetic field of 50 Hz and 100 µT for 48 hrs is performed with both exposure systems. The results of the study show reduced values of deviation from the central value of magnetic field intensity using the RILZ coil system. These differences are statistically significant compared to the Helmholtz configuration for the three Cartesian directions: x (p < 0.01), y (p < 0.01), z (p < 0.01). In addition, the intensity values for three different heights are statistically significantly correlated using the RILZ coil system (p < 0.01). The differences in cell behaviour are also statistically significant between the two systems (p < 0.01) and may be directly related to the differences found in the distribution of intensity values between the two systems. This study highlights the importance of the homogeneity of the magnetic field intensity generated by the exposure systems used and offers an effective solution to control the magnetic field exposure parameters in vitro assays.
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Affiliation(s)
- Marco-Xavier Rivera González
- Laboratorio de Bioelectromagnetismo, Centro de Tecnología Biomédica (CTB), Universidad Politécnica de Madrid, Madrid, Spain
- Escuela Técnica Superior de Ingenieros Informáticos (ETSIINF), Universidad Politécnica de Madrid, Madrid, Spain
| | - Isabel López de Mingo
- Laboratorio de Bioelectromagnetismo, Centro de Tecnología Biomédica (CTB), Universidad Politécnica de Madrid, Madrid, Spain
- Escuela Técnica Superior de Ingenieros de Telecomunicación (ETSIT), Universidad Politécnica de Madrid, Madrid, Spain
| | - Alexandra Amuneke Ramírez
- Escuela Técnica Superior de Ingenieros de Telecomunicación (ETSIT), Universidad Politécnica de Madrid, Madrid, Spain
| | - Ceferino Maestú Unturbe
- Laboratorio de Bioelectromagnetismo, Centro de Tecnología Biomédica (CTB), Universidad Politécnica de Madrid, Madrid, Spain
- Escuela Técnica Superior de Ingenieros de Telecomunicación (ETSIT), Universidad Politécnica de Madrid, Madrid, Spain
- Centro de Investigación Biomédica En Red - Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Centro de Investigación Biomédica en Red, Madrid, Spain
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3
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Su DB, Zhao ZX, Yin DC, Ye YJ. Promising application of pulsed electromagnetic fields on tissue repair and regeneration. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2024; 187:36-50. [PMID: 38280492 DOI: 10.1016/j.pbiomolbio.2024.01.003] [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: 07/11/2023] [Revised: 12/14/2023] [Accepted: 01/19/2024] [Indexed: 01/29/2024]
Abstract
Tissue repair and regeneration is a vital biological process in organisms, which is influenced by various internal mechanisms and microenvironments. Pulsed electromagnetic fields (PEMFs) are becoming a potential medical technology due to its advantages of effectiveness and non-invasiveness. Numerous studies have demonstrated that PEMFs can stimulate stem cell proliferation and differentiation, regulate inflammatory reactions, accelerate wound healing, which is of great significance for tissue regeneration and repair, providing a solid basis for enlarging its clinical application. However, some important issues such as optimal parameter system and potential deep mechanisms remain to be resolved due to PEMFs window effect and biological complexity. Thus, it is of great importance to comprehensively summarizing and analyzing the literature related to the biological effects of PEMFs in tissue regeneration and repair. This review expounded the biological effects of PEMFs on stem cells, inflammation response, wound healing and musculoskeletal disorders in order to improve the application value of PEMFs in medicine. It is believed that with the continuous exploration of biological effects of PEMFs, it will be applied increasingly widely to tissue repair and other diseases.
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Affiliation(s)
- Dan-Bo Su
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Zi-Xu Zhao
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Da-Chuan Yin
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Ya-Jing Ye
- Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, 710072, China.
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Benavides RAS, Leiro-Vidal JM, Rodriguez-Gonzalez JA, Ares-Pena FJ, López-Martín E. The HL-60 human promyelocytic cell line constitutes an effective in vitro model for evaluating toxicity, oxidative stress and necrosis/apoptosis after exposure to black carbon particles and 2.45 GHz radio frequency. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 867:161475. [PMID: 36632900 DOI: 10.1016/j.scitotenv.2023.161475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 12/21/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
The cellular and molecular mechanisms by which atmospheric pollution from particulate matter and/or electromagnetic fields (EMFs) may prove harmful to human health have not been extensively researched. We analyzed whether the combined action of EMFs and black carbon (BC) particles induced cell damage and a pro-apoptotic response in the HL-60 promyelocytic cell line when exposed to 2.45 GHz radio frequency (RF) radiation in a gigahertz transverse electromagnetic (GTEM) chamber at sub-thermal specific absorption rate (SAR) levels. RF and BC induced moderately significant levels of cell damage in the first 8 or 24 h for all exposure times/doses and much greater damage after 48 h irradiation and the higher dose of BC. We observed a clear antiproliferative effect that increased with RF exposure time and BC dose. Oxidative stress or ROS production increased with time (24 or 48 h of radiation), BC dose and the combination of both. Significant differences between the proportion of damaged and healthy cells were observed in all groups. Both radiation and BC participated separately and jointly in triggering necrosis and apoptosis in a programmed way. Oxidative-antioxidant action activated mitochondrial anti-apoptotic BCL2a gene expression after 24 h irradiation and exposure to BC. After irradiation of the cells for 48 h, expression of FASR cell death receptors was activated, precipitating the onset of pro-apoptotic phenomena and expression and intracellular activity of caspase-3 in the mitochondrial pathways, all of which can lead to cell death. Our results indicate that the interaction between BC and RF modifies the immune response in the human promyelocytic cell line and that these cells had two fates mediated by different pathways: necrosis and mitochondria-caspase dependent apoptosis. The findings may be important in regard to antimicrobial, inflammatory and autoimmune responses in humans.
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Affiliation(s)
- Rosa Ana Sueiro Benavides
- Institute of Research in Biological and Chemical Analysis, IAQBUS, University of Santiago de Compostela, Santiago de Compostela, Spain.
| | - José Manuel Leiro-Vidal
- Institute of Research in Biological and Chemical Analysis, IAQBUS, University of Santiago de Compostela, Santiago de Compostela, Spain.
| | - J Antonio Rodriguez-Gonzalez
- Department of Applied Physics, Santiago de Compostela School of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain.
| | - Francisco J Ares-Pena
- Department of Applied Physics, Santiago de Compostela School of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain.
| | - Elena López-Martín
- Department of Morphological Sciences, Santiago de Compostela School of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain.
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5
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Nguyen H, Segers S, Ledent M, Anthonissen R, Verschaeve L, Hinsenkamp M, Collard JF, Feipel V, Mertens B. Effects of long-term exposure to 50 Hz magnetic fields on cell viability, genetic damage, and sensitivity to mutagen-induced damage. Heliyon 2023; 9:e14097. [PMID: 36923833 PMCID: PMC10008985 DOI: 10.1016/j.heliyon.2023.e14097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 02/14/2023] [Accepted: 02/21/2023] [Indexed: 03/02/2023] Open
Abstract
Until today, it remains controversial whether long-term exposure to extremely low-frequency magnetic fields (ELF-MF) below the legislative exposure limits could result in adverse human health effects. In the present study, the effects of long-term in vitro MF exposure on three different study endpoints (cell viability, genetic damage, and sensitivity to damage induced by known mutagens) were investigated in the human B lymphoblastoid (TK6) cell line. Cells were exposed to 50 Hz MF at three selected magnetic flux densities (i.e., 10, 100, and 500 μT) for different exposure periods ranging from 96h up to 6 weeks. Cell viability following MF exposure was assessed using the ATP-based cell viability assay. Effects of MF exposure on cell genetic damage and cell sensitivity to mutagen-induced damage were evaluated using the in vitro alkaline comet assay and the in vitro cytokinesis block micronucleus assay. The results showed that long-term exposure up to 96h to 50 Hz MF at all tested flux densities could significantly increase TK6 cell viability. In contrast, long-term MF exposure did not affect cell genetic damage, and long-term pre-exposure to MF did not change cell sensitivity to damage induced by known mutagens. At certain time points, statistically significant difference in genotoxicity test results were observed between the MF-exposed cells and the control cells. However, these observations could not be confirmed in the repeat experiments, indicating that they are probably not biologically significant.
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Affiliation(s)
- Ha Nguyen
- Scientific Direction Chemical and Physical Health Risks, Sciensano, 1050 Ixelles, Belgium.,Faculty of Medicine, Universite Libre de Bruxelles, 1070 Brussels, Belgium
| | - Seppe Segers
- Scientific Direction Chemical and Physical Health Risks, Sciensano, 1050 Ixelles, Belgium
| | - Maryse Ledent
- Scientific Direction Chemical and Physical Health Risks, Sciensano, 1050 Ixelles, Belgium
| | - Roel Anthonissen
- Scientific Direction Chemical and Physical Health Risks, Sciensano, 1050 Ixelles, Belgium
| | - Luc Verschaeve
- Scientific Direction Chemical and Physical Health Risks, Sciensano, 1050 Ixelles, Belgium
| | - Maurice Hinsenkamp
- Faculty of Medicine, Universite Libre de Bruxelles, 1070 Brussels, Belgium
| | | | - Veronique Feipel
- Faculty of Medicine, Universite Libre de Bruxelles, 1070 Brussels, Belgium
| | - Birgit Mertens
- Scientific Direction Chemical and Physical Health Risks, Sciensano, 1050 Ixelles, Belgium
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6
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López I, Rivera M, Félix N, Maestú C. It is mandatory to review environmental radiofrequency electromagnetic field measurement protocols and exposure regulations: An opinion article. Front Public Health 2022; 10:992645. [PMID: 36353271 PMCID: PMC9639819 DOI: 10.3389/fpubh.2022.992645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 10/12/2022] [Indexed: 01/26/2023] Open
Affiliation(s)
- Isabel López
- Departamento de Fotónica y Bioingeniería (TFB), Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, Madrid, Spain,Laboratorio de Bioelectromagnetismo, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid, Spain
| | - Marco Rivera
- Laboratorio de Bioelectromagnetismo, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid, Spain
| | - Nazario Félix
- Laboratorio de Bioelectromagnetismo, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid, Spain,Departamento de Arquitectura y Tecnología de Sistemas Informáticos (DATSI), Escuela Técnica Superior de Ingenieros Informáticos, Universidad Politécnica de Madrid, Madrid, Spain
| | - Ceferino Maestú
- Departamento de Fotónica y Bioingeniería (TFB), Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, Madrid, Spain,Laboratorio de Bioelectromagnetismo, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid, Spain,CIBER–BBN Centro de Investigación Biomédica en Red, Madrid, Spain,*Correspondence: Ceferino Maestú
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7
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Huang M, Li P, Chen F, Cai Z, Yang S, Zheng X, Li W. Is extremely low frequency pulsed electromagnetic fields applicable to gliomas? A literature review of the underlying mechanisms and application of extremely low frequency pulsed electromagnetic fields. Cancer Med 2022; 12:2187-2198. [PMID: 35929424 PMCID: PMC9939155 DOI: 10.1002/cam4.5112] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 07/07/2022] [Accepted: 07/19/2022] [Indexed: 11/07/2022] Open
Abstract
Gliomas refer to a group of complicated human brain tumors with a low 5-year survival rate and limited therapeutic options. Extremely low-frequency pulsed electromagnetic field (ELF-PEMF) is a specific magnetic field featuring almost no side effects. However, the application of ELF-PEMF in the treatment of gliomas is rare. This review summarizes five significant underlying mechanisms including calcium ions, autophagy, apoptosis, angiogenesis, and reactive oxygen species, and applications of ELF-PEMF in glioma treatment from a clinical practice perspective. In addition, the prospects of ELF-PEMF in combination with conventional therapy for the treatment of gliomas are reviewed. This review benefits any specialists, especially oncologists, interested in this new therapy because it can help treat patients with gliomas properly.
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Affiliation(s)
- Mengqian Huang
- Cancer Center, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina
| | - Parker Li
- Clinical MedicineShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Feng Chen
- Cancer Center, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina
| | - Zehao Cai
- Cancer Center, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina
| | - Shoubo Yang
- Cancer Center, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina
| | - Xiaohong Zheng
- Cancer Center, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina
| | - Wenbin Li
- Cancer Center, Beijing Tiantan HospitalCapital Medical UniversityBeijingChina
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8
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Angotzi GN, Giantomasi L, Ribeiro JF, Crepaldi M, Vincenzi M, Zito D, Berdondini L. Integrated Micro-Devices for a Lab-in-Organoid Technology Platform: Current Status and Future Perspectives. Front Neurosci 2022; 16:842265. [PMID: 35557601 PMCID: PMC9086958 DOI: 10.3389/fnins.2022.842265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
Advancements in stem cell technology together with an improved understanding of in vitro organogenesis have enabled new routes that exploit cell-autonomous self-organization responses of adult stem cells (ASCs) and homogenous pluripotent stem cells (PSCs) to grow complex, three-dimensional (3D), mini-organ like structures on demand, the so-called organoids. Conventional optical and electrical neurophysiological techniques to acquire functional data from brain organoids, however, are not adequate for chronic recordings of neural activity from these model systems, and are not ideal approaches for throughput screenings applied to drug discovery. To overcome these issues, new emerging approaches aim at fusing sensing mechanisms and/or actuating artificial devices within organoids. Here we introduce and develop the concept of the Lab-in-Organoid (LIO) technology for in-tissue sensing and actuation within 3D cell aggregates. This challenging technology grounds on the self-aggregation of brain cells and on integrated bioelectronic micro-scale devices to provide an advanced tool for generating 3D biological brain models with in-tissue artificial functionalities adapted for routine, label-free functional measurements and for assay's development. We complete previously reported results on the implementation of the integrated self-standing wireless silicon micro-devices with experiments aiming at investigating the impact on neuronal spheroids of sinusoidal electro-magnetic fields as those required for wireless power and data transmission. Finally, we discuss the technology headway and future perspectives.
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Affiliation(s)
- Gian Nicola Angotzi
- Microtechnology for Neuroelectronics Laboratory, Fondazione Istituto Italiano di Tecnologia, Genova, Italy
| | - Lidia Giantomasi
- Microtechnology for Neuroelectronics Laboratory, Fondazione Istituto Italiano di Tecnologia, Genova, Italy
| | - Joao F. Ribeiro
- Microtechnology for Neuroelectronics Laboratory, Fondazione Istituto Italiano di Tecnologia, Genova, Italy
| | - Marco Crepaldi
- Electronic Design Laboratory, Fondazione Istituto Italiano di Tecnologia, Genova, Italy
| | - Matteo Vincenzi
- Microtechnology for Neuroelectronics Laboratory, Fondazione Istituto Italiano di Tecnologia, Genova, Italy
| | - Domenico Zito
- Department of Electrical and Computer Engineering, Aarhus University, Aarhus, Denmark
| | - Luca Berdondini
- Microtechnology for Neuroelectronics Laboratory, Fondazione Istituto Italiano di Tecnologia, Genova, Italy
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9
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Masoudi-Khoram N, Abdolmaleki P. Effects of repeated exposure to 50 Hz electromagnetic field on breast cancer cells. Electromagn Biol Med 2021; 41:44-51. [PMID: 34747307 DOI: 10.1080/15368378.2021.1995872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The extremely low frequency electromagnetic field (ELF-EMF) is emerging as a novel approach in cancer treatment. This study evaluated the impact of daily exposure to 50 Hz EMF on breast cancer cells in vitro. The MDA-MB-231 and MCF-7 cells were exposed to EMF (50 Hz 20 mT, for 3 hours per day for up to four days) and examined for cell vaibility. The effect of daily ELF-EMF exposure on cell cycle progression and cell death was further investigated. The result revealed that the consecutive exposure to 50 Hz EMF at 20 mT remarkably decreased the viability of MDA-MB-231 compared to the non-exposed group, while it had no significant effect on MCF-7 cells. The ELF-EMF exposure induced G1 phase arrest along with the increase in sub-G1 cell population in MDA-MB-231. Moreover, repeated exposure to 50 Hz EMF promoted cell cycle progression in MCF-7 by increasing the percentage of cells in the S phase. The fluorescent staining revealed that daily exposure of ELF-EMF induced apoptotic cell death in MDA-MB-231, but no morphological change was observed in MCF-7 cells. The results showed that repeated daily exposure to 50 Hz EMF exhibited anti-proliferative activity against invasive breast cancer cells by impairing cell cycle progression and inducing cell death.
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Affiliation(s)
- Nastaran Masoudi-Khoram
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Parviz Abdolmaleki
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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10
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Sueiro-Benavides RA, Leiro-Vidal JM, Salas-Sánchez AÁ, Rodríguez-González JA, Ares-Pena FJ, López-Martín ME. Radiofrequency at 2.45 GHz increases toxicity, pro-inflammatory and pre-apoptotic activity caused by black carbon in the RAW 264.7 macrophage cell line. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 765:142681. [PMID: 33071139 DOI: 10.1016/j.scitotenv.2020.142681] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 09/15/2020] [Accepted: 09/20/2020] [Indexed: 06/11/2023]
Abstract
Environmental factors such as air pollution by particles and/or electromagnetic fields (EMFs) are studied as harmful agents for human health. We analyzed whether the combined action of EMF with fine and coarse black carbon (BC) particles induced cell damage and inflammatory response in RAW 264.7 cell line macrophages exposed to 2.45 GHz in a gigahertz transverse electromagnetic (GTEM) chamber at sub-thermal specific absorption rate (SAR) levels. Radiofrequency (RF) dramatically increased BC-induced toxicity at high doses in the first 24 h and toxicity levels remained high 72 h later for all doses. The increase in macrophage phagocytosis induced after 24 h of RF and the high nitrite levels obtained by stimulation with lipopolysaccharide (LPS) endotoxin 24 and 72 h after radiation exposure suggests a prolongation of the innate and inflammatory immune response. The increase of proinflammatory cytokines tumor necrosis factor-α, after 24 h, and of interleukin-1β and caspase-3, after 72 h, indicated activation of the pro-inflammatory response and the apoptosis pathways through the combined effect of radiation and BC. Our results indicate that the interaction of BC and RF modifies macrophage immune response, activates apoptosis, and accelerates cell toxicity, by which it can activate the induction of hypersensitivity reactions and autoimmune disorders.
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Affiliation(s)
- Rosa Ana Sueiro-Benavides
- Research Institute on Chemical and Biological Analysis, Dept. of Microbiology and Parasitology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Jose Manuel Leiro-Vidal
- Research Institute on Chemical and Biological Analysis, Dept. of Microbiology and Parasitology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Aarón Ángel Salas-Sánchez
- CRETUS Institute, Dept. Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain; ELEDIA@UniTN - DISI - University of Trento, 38123, Trentino-Alto Adige, Italy.
| | - J Antonio Rodríguez-González
- CRETUS Institute, Dept. Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Francisco J Ares-Pena
- CRETUS Institute, Dept. Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - M Elena López-Martín
- CRETUS Institute, Dept. Morphological Sciences, Faculty of Medicine, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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11
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Shabani Z, Mohammad Nejad D, Ghadiri T, Karimipour M. Evaluation of the neuroprotective effects of Vitamin E on the rat substantia nigra neural cells exposed to electromagnetic field: An ultrastructural study. Electromagn Biol Med 2021; 40:428-437. [PMID: 33794719 DOI: 10.1080/15368378.2021.1907404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Electromagnetic fields (EMFs) could induce oxidative stress (OS) in human tissues. Lipid peroxidation (LPO) is the main hallmark of OS that harms neural cell components, primarily lipids in the myelin sheaths and membranes. Vitamin E is a lipophilic antioxidant that protects cells from OS-related damages and inhibits the LPO process. In this study, male rats were assigned into three groups of Control, EMF, and EMF+ Vitamin E. The EMF producer equipment produced an alternate current of 50 Hz, 3 Mili Tesla (mT). At the end of the experiment, half of the substantia nigra in every sample was used for measurement of the malondialdehyde (MDA) level as the end-product of the LPO and activity of superoxide dismutase (SOD) enzyme. The next half of the tissue was prepared for transmission electron microscopy (TEM). In the EMF group, MDA level was enhanced and SOD value decreased significantly compared to the control group, but Vitamin E could restore these changes. In rats undergone EMF, heterochromatic nucleus and destruction in some portions of the nuclear membrane were detected. The segmental separation or destruction of myelin sheath lamellae was observed in nerve fibers. In treated animals, the nucleus was round, less heterochromatic, with a regular membrane. Separation of myelin sheath lamellae in some nerve fibers was slighter than the radiation group. Considering the results, EMF exposure induces LPO and triggers ultrastructural changes in the cell membranes, nucleus, and myelin sheath of substantia nigra cells, but Vitamin E consumption weakens these neuropathological alterations.
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Affiliation(s)
- Zahra Shabani
- Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Daryoush Mohammad Nejad
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Anatomical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tahereh Ghadiri
- Department of Neurosciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Karimipour
- Department of Anatomical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Neurosciences, Tabriz University of Medical Sciences, Tabriz, Iran
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García-Minguillán O, Maestú C. 30 Hz, Could It Be Part of a Window Frequency for Cellular Response? Int J Mol Sci 2021; 22:3642. [PMID: 33807400 PMCID: PMC8036499 DOI: 10.3390/ijms22073642] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 03/16/2021] [Accepted: 03/28/2021] [Indexed: 11/24/2022] Open
Abstract
Many exogenous and endogenous risk factors have been proposed as precursors of brain tumors, including the exposure to non-ionizing electromagnetic fields. Nevertheless, there is still a debate among the scientific community about the hazard of the effects produced by non-ionizing radiation (NIR) because conflicting results have been found (number of articles reviewed >50). For that reason, to provide new evidence on the possible effects produced by exposure to NIR, we performed different studies with several combinations of extremely low frequencies, times, and field intensities in tumoral and non-tumoral cells. The results of our studies showed that cell viability was frequency dependent in glioblastoma cells. In fact, our results revealed that a frequency of 30 Hz-or even other frequencies close to 30 Hz-could constitute a window frequency determinant of the cellular response in tumoral and non-tumoral cells.
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Affiliation(s)
- Olga García-Minguillán
- Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, 28040 Madrid, Spain;
| | - Ceferino Maestú
- Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, 28040 Madrid, Spain;
- CTB (CTB-UPM) Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón, Spain
- CIBER-BBN Centro de Investigación Biomédica en Red, 28029 Madrid, Spain
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Nguyen H, Ledent M, Beauvois V, Anthonissen R, Verschaeve L, Collard JF, Hinsenkamp M, Feipel V, Mertens B. In vitro 50 Hz magnetic field long-term exposure: Cytogenetic tests on human lymphoblastoid TK6 cells and validation of the test environment. MethodsX 2020; 7:101071. [PMID: 33088726 PMCID: PMC7558212 DOI: 10.1016/j.mex.2020.101071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/17/2020] [Indexed: 11/05/2022] Open
Abstract
Potential health effects of extremely low-frequency (electro)magnetic fields (ELF-(E)MFs) have long been investigated, but the results are still inconclusive. With respect to genotoxicity, sound data related to the effects of long-term exposure to ELF-(E)MFs on the genetic material and the impact of long-term pre-exposure to ELF-(E)MFs on the sensitivity of cells to the damage induced by known mutagens are needed. In this manuscript, an optimized protocol for a combined in vitro comet/micronucleus study to investigate these effects in a human lymphoblastoid cell line (TK6) is provided including the description of a well-validated exposure system. Furthermore, the use of a shielding system to limit background ELF-MFs inside the incubator is described as well.•Optimized protocols for cytogenetic tests with ELF-MFs on TK6 cells ensure the reproducibility of test results.•Validation of exposure environment and exposure system are needed prior to performing tests with ELF-MFs.•A simple, but effective method to shield cells and reduce unintentional ELF-MF exposure consists of using the mu-metal cylinder. This is of particular interest when studying the effects of low exposure levels.
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Affiliation(s)
- Ha Nguyen
- Scientific Direction Chemical and Physical Health Risks, Sciensano, Belgium
- Universite Libre de Bruxelles, Belgium
| | - Maryse Ledent
- Scientific Direction Chemical and Physical Health Risks, Sciensano, Belgium
| | | | - Roel Anthonissen
- Scientific Direction Chemical and Physical Health Risks, Sciensano, Belgium
| | - Luc Verschaeve
- Scientific Direction Chemical and Physical Health Risks, Sciensano, Belgium
| | | | | | | | - Birgit Mertens
- Scientific Direction Chemical and Physical Health Risks, Sciensano, Belgium
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García-Minguillán O, Prous R, Ramirez-Castillejo MDC, Maestú C. CT2A Cell Viability Modulated by Electromagnetic Fields at Extremely Low Frequency under No Thermal Effects. Int J Mol Sci 2019; 21:ijms21010152. [PMID: 31878361 PMCID: PMC6981628 DOI: 10.3390/ijms21010152] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 11/16/2022] Open
Abstract
The effects produced by electromagnetic fields (EMFs) on human beings at extremely low frequencies (ELFs) have being investigated in the past years, across in vitro studies, using different cell lines. Nevertheless, the effects produced on cells are not clarified, and the cellular mechanisms and cell-signaling processes involved are still unknown. This situation has resulted in a division among the scientific community about the adequacy of the recommended level of exposure. In this sense, we consider that it is necessary to develop long-term exposure studies and check if the recommended levels of EMFs are under thermal effects. Hence, we exposed CT2A cells to different EMFs at different ELFs at short and long times. Our results showed frequency dependence in CT2A exposed during 24 h to a small EMF of 30 μT equal to those originated by the Earth and frequency dependence after the exposure during seven days to an EMF of 100 µT at different ELFs. Particularly, our results showed a remarkable cell viability decrease of CT2A cells exposed to EMFs of 30 Hz. Nevertheless, after analyzing the thermal effects in terms of HSP90 expression, we did not find thermal damages related to the differences in cell viability, so other crucial cellular mechanism should be involved.
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Affiliation(s)
- Olga García-Minguillán
- Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, 28040 Madrid, Spain; (O.G.-M.); (R.P.)
- CTB (CTB-UPM) Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón, Spain
| | - Raquel Prous
- Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, 28040 Madrid, Spain; (O.G.-M.); (R.P.)
| | | | - Ceferino Maestú
- Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, 28040 Madrid, Spain; (O.G.-M.); (R.P.)
- CTB (CTB-UPM) Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, 28223 Pozuelo de Alarcón, Spain
- CIBER-BBN Centro de Investigación Biomédica en Red, 28029 Madrid, Spain
- Correspondence: ; Tel.: +34-9133-646-55
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