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Gökçek-Saraç Ç, Çetin E, Ateş K, Özen Ş, Karakurt S. Different duration of exposure to a pulsed magnetic field can cause changes in mRNA expression of apoptotic genes in oleic acid-treated neuroblastoma cells. Int J Radiat Biol 2024:1-10. [PMID: 39088733 DOI: 10.1080/09553002.2024.2386968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 06/20/2024] [Accepted: 07/22/2024] [Indexed: 08/03/2024]
Abstract
PURPOSE Neuroblastoma, a prevalent childhood tumor, poses significant challenges in therapeutic interventions, especially for high-risk cases. This study aims to fill a crucial gap in our understanding of neuroblastoma treatment by investigating the potential molecular impacts of short- and long-term pulsed magnetic field exposure on the neuronal apoptosis mechanism in an in vitro model of neuroblastoma treated with oleic acid (OA). MATERIALS AND METHODS Cells were cultured and divided into six following experimental groups: (I) Nontreated group (NT); (II) OA-treated group (OA); (III) Group treated with OA after being exposed to the pulsed magnetic field for 15-min (15 min PEMF + OA); (IV) Group treated with OA after being exposed to the pulsed magnetic field for 12 h (12 h PEMF + OA); (V) Group exposed to the pulsed magnetic field for 15 min (15 min PEMF); and (VI) Group exposed to the pulsed magnetic field for 12 h (12 h PEMF). Cell viability, rates of apoptosis, and mRNA levels of key apoptotic genes (TP53, Bcl2, Bax, and Caspase-3) were assessed. RESULTS Significant reductions in cell viability were observed, particularly in the group treated with OA following long-term pulsed magnetic field exposure. Flow cytometry revealed elevated apoptosis rates, notably in the early stages of apoptosis. qRT-PCR analysis demonstrated increased expression of cleaved Caspase-3, Bax/Bcl2 ratio, and TP53 in cells treated with OA following long-term pulsed magnetic field exposure, signifying enhanced apoptotic pathways. CONCLUSIONS The findings indicate that long-term pulsed magnetic field exposure and OA treatment exhibit potential synergistic effects leading to the induction of apoptosis in SH-SY5Y cells. We have concluded that stimulations of pulsed magnetic field have the potential to serve as an adjuvant therapy for oleic acid-based treatment of neuroblastoma.
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Affiliation(s)
- Çiğdem Gökçek-Saraç
- Department of Biomedical Engineering, Faculty of Engineering, Akdeniz University, Antalya, Turkey
| | - Ebru Çetin
- Department of Biomedical Engineering, Faculty of Engineering, Akdeniz University, Antalya, Turkey
| | - Kayhan Ateş
- Department of Electrical and Electronics Engineering, Faculty of Engineering, Akdeniz University, Antalya, Turkey
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Pavia, Italy
| | - Şükrü Özen
- Department of Electrical and Electronics Engineering, Faculty of Engineering, Akdeniz University, Antalya, Turkey
| | - Serdar Karakurt
- Department of Biochemistry, Faculty of Science, Selçuk University, Konya, Turkey
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Zhang Q, Hou Q, An G. Effects of electromagnetic pulses, exosomes inhibition and their coaction on A549 cells. Bioelectromagnetics 2024; 45:218-225. [PMID: 38533693 DOI: 10.1002/bem.22500] [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: 01/20/2023] [Revised: 11/16/2023] [Accepted: 02/09/2024] [Indexed: 03/28/2024]
Abstract
Mounting literature indicates that electromagnetic pulses (EMP) is the promising modality to treat cancers with advantages such as noninvasiveness and few side-effects, but its appropriate parameters and underlying mechanisms such as its influence on tumor-derived exosomes (TDEs) are largely unknown. This study aimed to elucidate effects of EMP, exosome inhibition and their coaction on A549 lung adenocarcinoma cells. A549 cells were randomly divided into control group, GW4869 group treated by 20 μM GW4869, vehicle group treated by dimethyl sulfoxide, EMP group treated by EMP exposure, and EMPG group treated by EMP exposure combined with 20 μM GW4869. After EMP exposure, cell proliferation was determined by CCK8 assay, cell cycle and apoptosis was detected by flow cytometry, and cell migration was determined by transwell assay. The results showed that EMP or exosomes inhibition did not affect cell proliferation, cell cycle, apoptosis and cell migration (p > 0.05), but cell migration in EMPG group was significantly decreased compared with vehicle group (p < 0.05). We concluded that under the experimental condition, EMP or GW4869 alone had no effects on behaviors of A549 cells, but their coaction could effectively inhibit the migration of A549 cells.
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Affiliation(s)
- Qian Zhang
- Cadet Brigade, College of Basic Medicine, Air Force Medical University, Xi'an City, Shannxi Province, China
| | - Qingxia Hou
- State Key Laboratory of Cancer Biology, Department of Pathology, Xijing Hospital and School of Basic Medicine, Air Force Medical University, Xi'an City, Shannxi Province, China
| | - Guangzhou An
- Department of Radiation Protection Medicine, Ministry of Education Key Laboratory of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an City, Shannxi Province, China
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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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4
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Liu Y, Tang Q, Tao Q, Dong H, Shi Z, Zhou L. Low-frequency magnetic field therapy for glioblastoma: Current advances, mechanisms, challenges and future perspectives. J Adv Res 2024:S2090-1232(24)00125-5. [PMID: 38565404 DOI: 10.1016/j.jare.2024.03.024] [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: 12/28/2023] [Revised: 03/10/2024] [Accepted: 03/29/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Glioblastoma (GBM) is the most common malignant tumour of the central nervous system. Despite recent advances in multimodal GBM therapy incorporating surgery, radiotherapy, systemic therapy (chemotherapy, targeted therapy), and supportive care, the overall survival (OS) remains poor, and long-term survival is rare. Currently, the primary obstacles hindering the effectiveness of GBM treatment are still the blood-brain barrier and tumor heterogeneity. In light of its substantial advantages over conventional therapies, such as strong penetrative ability and minimal side effects, low-frequency magnetic fields (LF-MFs) therapy has gradually caught the attention of scientists. AIM OF REVIEW In this review, we shed the light on the current status of applying LF-MFs in the treatment of GBM. We specifically emphasize our current understanding of the mechanisms by which LF-MFs mediate anticancer effects and the challenges faced by LF-MFs in treating GBM cells. Furthermore, we discuss the prospective applications of magnetic field therapy in the future treatment of GBM. Key scientific concepts of review: The review explores the current progress on the use of LF-MFs in the treatment of GBM with a special focus on the potential underlying mechanisms of LF-MFs in anticancer effects. Additionally, we also discussed the complex magnetic field features and biological characteristics related to magnetic bioeffects. Finally, we proposed a promising magnetic field treatment strategy for future applications in GBM therapy.
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Affiliation(s)
- Yinlong Liu
- Department of Neurosurgery, Huashan Hospital, Fudan University, China
| | - Qisheng Tang
- Department of Neurosurgery, Huashan Hospital, Fudan University, China; National Center for Neurological Disorders, China; Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, China; Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, China
| | - Quan Tao
- Shanghai Institute of Microsystem and Information Technology, China
| | - Hui Dong
- Shanghai Institute of Microsystem and Information Technology, China
| | - Zhifeng Shi
- Department of Neurosurgery, Huashan Hospital, Fudan University, China; National Center for Neurological Disorders, China; Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, China; Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, China.
| | - Liangfu Zhou
- Department of Neurosurgery, Huashan Hospital, Fudan University, China; National Center for Neurological Disorders, China; Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, China; Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, China.
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Liu L, Huang B, Lu Y, Zhao Y, Tang X, Shi Y. Interactions between electromagnetic radiation and biological systems. iScience 2024; 27:109201. [PMID: 38433903 PMCID: PMC10906530 DOI: 10.1016/j.isci.2024.109201] [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] [Indexed: 03/05/2024] Open
Abstract
Even though the bioeffects of electromagnetic radiation (EMR) have been extensively investigated during the past several decades, our understandings of the bioeffects of EMR and the mechanisms of the interactions between the biological systems and the EMRs are still far from satisfactory. In this article, we introduce and summarize the consensus, controversy, limitations, and unsolved issues. The published works have investigated the EMR effects on different biological systems including humans, animals, cells, and biochemical reactions. Alternative methodologies also include dielectric spectroscopy, detection of bioelectromagnetic emissions, and theoretical predictions. In many studies, the thermal effects of the EMR are not properly controlled or considered. The frequency of the EMR investigated is limited to the commonly used bands, particularly the frequencies of the power line and the wireless communications; far fewer studies were performed for other EMR frequencies. In addition, the bioeffects of the complex EM environment were rarely discussed. In summary, our understanding of the bioeffects of the EMR is quite restrictive and further investigations are needed to answer the unsolved questions.
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Affiliation(s)
- Lingyu Liu
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Bing Huang
- Brain Function and Disease Laboratory, Department of Pharmacology, Shantou University Medical College, 22 Xin-Ling Road, Shantou 515041, China
| | - Yingxian Lu
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Yanyu Zhao
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Xiaping Tang
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
| | - Yigong Shi
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Westlake Laboratory of Life Sciences and Biomedicine, Xihu District, Hangzhou 310024, Zhejiang Province, China
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake University; Institute of Biology, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
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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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Aydemir E, Arslan İİ, Görkay AH. The Application of Electromagnetic Fields in Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1450:103-120. [PMID: 37755661 DOI: 10.1007/5584_2023_788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
The use of nonionizing electromagnetic fields (EMFs) has attracted interest in cancer research during the past few decades due to its noninvasive therapeutic successes in the treatment of cancer. Some epidemiological studies suggest that there may be a link between exposure to EMF and developing malignancies (such as leukemia and gliomas) or neurodegenerative diseases since EMF has a variety of biological effects such as altering reactive oxygen species (ROS)-regulated pathways. EMF exposure, however, has the potential to cause cancer cells to undergo a period of regulated cell death. Therefore, it is important to thoroughly investigate how EMF might influence cellular processes such as proliferation, differentiation, and apoptosis - processes that are targeted in cancer treatment. In this chapter, we give a thorough summary of the most recent studies on the potential use of various EMF applications with adjustable settings to treat different forms of cancer.
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Affiliation(s)
- Esra Aydemir
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey.
| | - İsmail İshak Arslan
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey
| | - Ahmet Hakan Görkay
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences, Biruni University, Istanbul, Turkey
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8
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Amirinejad M, Eftekhar-Vaghefi SH, Nematollahi Mahani SN, Salari M, Yahyapour R, Ahmadi-Zeidabadi M. Exposure to Low-Frequency Radiation Changes the Expression of Nestin, VEGF, BCRP and Apoptosis Markers During Glioma Treatment Strategy: An In Vitro Study. Curr Radiopharm 2024; 17:55-67. [PMID: 38817005 DOI: 10.2174/0118744710258350230921065159] [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: 04/17/2023] [Revised: 08/20/2023] [Accepted: 08/28/2023] [Indexed: 06/01/2024]
Abstract
BACKGROUND Exposure to physical contamination during chemotherapy, including non-ionizing electromagnetic fields, raises concerns about the widespread sources of exposure to this type of radiation. Glioblastoma multiforme (GBM) is an aggressive central nervous system tumor that is hard to treat due to resistance to drugs such as temozolomide (TMZ). OBJECTIVE Electromagnetic fields (EMF) and haloperidol (HLP) may have anticancer effects. In this study, we investigated the effects of TMZ, HLP, and EMF on GBM cell lines and analyzed the association between non-ionizing radiation and the risk of change in drug performance. METHODS Cell viability and reactive oxygen species (ROS) generation were measured by MTT and NBT assay, respectively. Then, the expression levels of breast cancer-resistant protein (BCRP), Bax, Bcl2, Nestin, vascular endothelial growth factor (VEGF) genes, and P53, Bax, and Bcl2 Proteins were evaluated by real-time PCR and western blot. RESULTS Co-treatment of GBM cells by HLP and TMZ enhanced apoptosis in T-98G and A172 cells by increasing the expression of P53 and Bax and decreasing Bcl-2. Interestingly, exposure of GBM cells to EMF decreased apoptosis in the TMZ+HLP group. CONCLUSION In conclusion, EMF reduced the synergistic effect of TMZ and HLP. This hypothesis that patients who are treated for brain tumors and suffer from depression should not be exposed to EMF is proposed in the present study. There appears to be an urgent need to reconsider exposure limits for low-frequency magnetic fields, based on experimental and epidemiological research, the relationship between exposure to non-ionizing radiation and adverse human health effects.
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Affiliation(s)
- Maryam Amirinejad
- Department of Anatomy, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Seyed Hassan Eftekhar-Vaghefi
- Department of Anatomy, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | | | | | - Rasoul Yahyapour
- School of Medicine, Jiroft University of Medical Sciences, Jiroft, Iran
| | - Meysam Ahmadi-Zeidabadi
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
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Eskandani R, Zibaii MI. Unveiling the biological effects of radio-frequency and extremely-low frequency electromagnetic fields on the central nervous system performance. BIOIMPACTS : BI 2023; 14:30064. [PMID: 39104617 PMCID: PMC11298025 DOI: 10.34172/bi.2023.30064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 11/09/2023] [Accepted: 11/26/2023] [Indexed: 08/07/2024]
Abstract
Introduction Radiofrequency electromagnetic radiation (RF-EMR) and extremely low-frequency electromagnetic fields (ELF-EMF) have emerged as noteworthy sources of environmental pollution in the contemporary era. The potential biological impacts of RF-EMR and ELF-EMF exposure on human organs, particularly the central nervous system (CNS), have garnered considerable attention in numerous research studies. Methods This article presents a comprehensive yet summarized review of the research on the explicit/implicit effects of RF-EMR and ELF-EMF exposure on CNS performance. Results Exposure to RF-EMR can potentially exert adverse effects on the performance of CNS by inducing changes in the permeability of the blood-brain barrier (BBB), neurotransmitter levels, calcium channel regulation, myelin protein structure, the antioxidant defense system, and metabolic processes. However, it is noteworthy that certain reports have suggested that RF-EMR exposure may confer cognitive benefits for various conditions and disorders. ELF-EMF exposure has been associated with the enhancement of CNS performance, marked by improved memory retention, enhanced learning ability, and potential mitigation of neurodegenerative diseases. Nevertheless, it is essential to acknowledge that ELF-EMF exposure has also been linked to the induction of anxiety states, oxidative stress, and alterations in hormonal regulation. Moreover, ELF-EMR exposure alters hippocampal function, notch signaling pathways, the antioxidant defense system, and synaptic activities. Conclusion The RF-EMR and ELF-EMF exposures exhibit both beneficial and adverse effects. Nevertheless, the precise conditions and circumstances under which detrimental or beneficial effects manifest (either individually or simultaneously) remain uncertain.
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Affiliation(s)
- Ramin Eskandani
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran 19839-69411, Iran
| | - Mohammad Ismail Zibaii
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran 19839-69411, Iran
- Institute for Cognitive and Brain Sciences, Shahid Beheshti University, Tehran 19839-69411, Iran
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Mehdizadeh R, Ansari AM, Forouzesh F, Ghadirian R, Shahriari F, Shariatpanahi SP, Javidi MA. Cross-talk between non-ionizing electromagnetic fields and metastasis; EMT and hybrid E/M may explain the anticancer role of EMFs. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2023:S0079-6107(23)00060-3. [PMID: 37302516 DOI: 10.1016/j.pbiomolbio.2023.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/06/2023] [Accepted: 06/09/2023] [Indexed: 06/13/2023]
Abstract
Recent studies have shown that non-ionizing electromagnetic fields (NIEMFs) in a specific frequency, intensity, and exposure time can have anti-cancer effects on various cancer cells; however, the underlying precise mechanism of action is not transparent. Most cancer deaths are due to metastasis. This important phenomenon plays an inevitable role in different steps of cancer including progression and development. It has different stages including invasion, intravasation, migration, extravasation, and homing. Epithelial-mesenchymal transition (EMT), as well as hybrid E/M state, are biological processes, that involve both natural embryogenesis and tissue regeneration, and abnormal conditions including organ fibrosis or metastasis. In this context, some evidence reveals possible footprints of the important EMT-related pathways which may be affected in different EMFs treatments. In this article, critical EMT molecules and/or pathways which can be potentially affected by EMFs (e.g., VEGFR, ROS, P53, PI3K/AKT, MAPK, Cyclin B1, and NF-кB) are discussed to shed light on the mechanism of EMFs anti-cancer effect.
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Affiliation(s)
- Romina Mehdizadeh
- Department of Genetics, Faculty of Advanced Science, and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Alireza Madjid Ansari
- Department of Integrative Oncology, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Flora Forouzesh
- Department of Genetics, Faculty of Advanced Science, and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Reyhane Ghadirian
- Department of Integrative Oncology, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Fatemeh Shahriari
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | | | - Mohammad Amin Javidi
- Department of Integrative Oncology, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran; Department of Genetics, Faculty of Advanced Science, and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
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Askaripour K, Żak A. A mechanistically approached review upon assorted cell lines stimulated by athermal electromagnetic irradiation. Cell Cycle 2023; 22:1319-1342. [PMID: 37144743 PMCID: PMC10228405 DOI: 10.1080/15384101.2023.2206682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/21/2022] [Accepted: 11/21/2022] [Indexed: 05/06/2023] Open
Abstract
The probable influence of electromagnetic irradiation on cancer treatment has been deduced from the interaction of artificial electromagnetic emissions with biological organisms. Nonetheless, the suspected health effects induced by electromagnetic-based technology imply that such a treatment may contaminate the adjacent healthy cells. Thus, gaining mechanistic insights into the problem is required to avoid athermal health hazards. To tackle that, the current review, based upon in vitro studies into assorted cell lines, depicts the alterations in physiological processes triggered by electromagnetic irradiation via addressing gene regulatory cascades. Furthermore, decisive factors in the hypothesized cause-effect linkage in terms of the cell line-associated, exposure-associated, or endpoint-associated parameters are highlighted. As a result, subcellular structures such as aberrant Ca2+ channels, rich glycocalyx charge, or high water content in cancerous cells, which have attracted a great deal of attention, can explain their higher susceptibility compared with healthy cells under irradiation. Affected by cell components or geometry, the cellular biological window correlates with the metabolic or cell cycle status and determines the irradiation that causes the maximum influence. For instance, correlations between the frequency (or intensity) of irradiation and cell excitability or between the duration of irradiation and cell doubling time are observed. There are unspecified signaling pathways such as the pathway of PPAR-γ or MAPKs, and also proteins devoid of any investigation such as p14, or S phase-related and G2 phase-related proteins. Other chains, such as the cAMP connection with mitochondrial ATP or ERK signaling, the association of Hsps releases with signaling pathways of MAPKs, or the role of different ion channels in regulating various cell processes, require further investigation.
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Affiliation(s)
- Khadijeh Askaripour
- Department of Biomechatronics, Gdansk University of Technology, Gdansk, Poland
| | - Arkadiusz Żak
- Department of Biomechatronics, Gdansk University of Technology, Gdansk, Poland
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Tekam CKS, Majumdar S, Kumari P, Prajapati SK, Sahi AK, Shinde S, Singh R, Samaiya PK, Patnaik R, Krishnamurthy S, Mahto SK. Effects of ELF-PEMF exposure on spontaneous alternation, anxiety, motor co-ordination and locomotor activity of adult wistar rats and viability of C6 (Glial) cells in culture. Toxicology 2023; 485:153409. [PMID: 36572170 DOI: 10.1016/j.tox.2022.153409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 12/18/2022] [Accepted: 12/19/2022] [Indexed: 12/25/2022]
Abstract
The effects of ELF-PEMF exposure on spontaneous alternation, anxiety, motor coordination, and locomotor activity have been discussed in various pre-clinical and clinical settings. Several epidemiological and experimental studies have demonstrated the potential effects of ELF-PEMF when exposed > ∼1 h/day; however, very few studies have focused on understanding the influence of ELF-PEMF exposure of 1-3 mT with an exposure duration of < 1 h/day on spontaneous alternation, anxiety, motor coordination, and locomotor activity. Hence, we attempted to study the effects of ELF-PEMF exposure of 1-3 mT, 50 Hz with an exposure duration of 20 min each with a 4 h gap (2 times) on the cellular proliferation and morphologies of C6 (Glial) cells and spontaneous alternation, anxiety, motor coordination and locomotor activity of Wistar rats under in vitro and in vivo conditions, respectively. The results showed that ELF-PEMF exposure did not induce any significant levels of cellular fragmentation and changes in the morphology of glial cells. Also, the outcomes revealed no noticeable effects on spontaneous alternation, anxiety, motor coordination, and locomotor activity in PEMF-exposed groups compared with the control. No undesirable side effects were observed at the highest dose (B=3 mT). We also performed histological analysis of the selected brain sections (hippocampus and cortex) following ELF-PEMF exposure. Incidentally, no significant changes were observed in cortical cell counts, tissue structure, and morphology.
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Affiliation(s)
- Chandra Kant Singh Tekam
- Tissue Engineering and Bio-Microfluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, India
| | - Shreyasi Majumdar
- Neurotherapeutics Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University) Varanasi, India
| | - Pooja Kumari
- Tissue Engineering and Bio-Microfluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, India
| | - Santosh Kumar Prajapati
- Neurotherapeutics Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University) Varanasi, India; Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, FL 33613, USA
| | - Ajay Kumar Sahi
- Tissue Engineering and Bio-Microfluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, India
| | - Saksha Shinde
- Department of Biomedical Engineering, Shri Govindram Seksariya Institute of Technology and Science, Indore, India
| | - Richa Singh
- Tissue Engineering and Bio-Microfluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, India
| | - Puneet Kumar Samaiya
- Department of Pharmacy, Shri Govindram Seksariya Institute of Technology and Science, Indore, India
| | - Ranjana Patnaik
- School of Biological and Biomedical Sciences, Galgotias University, Greater Noida, UP, India; Electrophysiology Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, India
| | - Sairam Krishnamurthy
- Neurotherapeutics Laboratory, Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University) Varanasi, India
| | - Sanjeev Kumar Mahto
- Tissue Engineering and Bio-Microfluidics Laboratory, School of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University) Varanasi, India.
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13
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Jagetia GC. Genotoxic effects of electromagnetic field radiations from mobile phones. ENVIRONMENTAL RESEARCH 2022; 212:113321. [PMID: 35508219 DOI: 10.1016/j.envres.2022.113321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/18/2021] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
The use of wireless communication technology in mobile phones has revolutionized modern telecommunication and mobile phones have become so popular that their number exceeds the global population. Electromagnetic field radiations (EMR) are an integral part of wireless technology, which are emitted by mobile phones, mobile tower antennas, electric power stations, transmission lines, radars, microwave ovens, television sets, refrigerators, diagnostic, therapeutic, and other electronic devices. Manmade EMR sources have added to the existing burden of natural EMR human exposure arising from the Sun, cosmos, atmospheric discharges, and thunder storms. EMR including radiofrequency waves (RF) and extremely low-frequency radiation (ELF) has generated great interest as their short-term exposure causes headache, fatigue, tinnitus, concentration problems, depression, memory loss, skin irritation, sleep disorders, nausea, cardiovascular effects, chest pain, immunity, and hormonal disorders in humans, whereas long-term exposure to EMR leads to the development of cancer. The review has been written by collecting the information using various search engines including google scholar, PubMed, SciFinder, Science direct, EMF-portal, saferemr, and other websites from the internet. The main focus of this review is to delineate the mutagenic and genotoxic effects of EMR in humans and mammals. Numerous investigations revealed that exposure in the range of 0-300 GHz EMR is harmless as it did not increase micronuclei and chromosome aberrations. On the contrary, several other studies have demonstrated that exposure to EMR is genotoxic and mutagenic as it increases the frequency of micronuclei, chromosome aberrations, DNA adducts, DNA single and double strand breaks at the molecular level in vitro and in vivo. The EMR exposure induces reactive oxygen species and changes the fidelity of genes involved in signal transduction, cytoskeleton formation, and cellular metabolism.
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14
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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: 0] [Impact Index Per Article: 0] [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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15
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Aparicio-Bautista DI, Chávez-Valenzuela D, Ambriz-Álvarez G, Córdova-Fraga T, Reyes-Grajeda JP, Medina-Contreras Ó, Rodríguez-Cruz F, García-Sierra F, Zúñiga-Sánchez P, Gutiérrez-Gutiérrez AM, Arellanes-Robledo J, Basurto-Islas G. An Extremely Low-Frequency Vortex Magnetic Field Modifies Protein Expression, Rearranges the Cytoskeleton, and Induces Apoptosis of a Human Neuroblastoma Cell Line. Bioelectromagnetics 2022; 43:225-244. [PMID: 35437793 DOI: 10.1002/bem.22400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 11/10/2021] [Accepted: 03/19/2022] [Indexed: 11/07/2022]
Abstract
Homogeneous extremely low-frequency electromagnetic fields (ELF-EMFs) alter biological phenomena, including the cell phenotype and proliferation rate. Heterogenous vortex magnetic fields (VMFs), a new approach of exposure to magnetic fields, induce systematic movements on charged biomolecules from target cells; however, the effect of VMFs on living systems remains uncertain. Here, we designed, constructed, and characterized an ELF-VMF-modified Rodin's coil to expose SH-SY5Y cells. Samples were analyzed by performing 2D-differential-gel electrophoresis, identified by MALDI-TOF/TOF, validated by western blotting, and characterized by confocal microscopy. A total of 106 protein spots were differentially expressed; 40 spots were downregulated and 66 were upregulated in the exposed cell proteome, compared to the control cell proteome. The identified spots are associated with cytoskeleton and cell viability proteins, and according to the protein-protein interaction network, a significant interaction among them was found. Our data revealed a decrease in cell survival associated with apoptotic cells without effects on the cell cycle, as well as evident changes in the cytoskeleton. We demonstrated that ELF-VMFs, at a specific frequency and exposure time, alter the cell proteome and structurally affect the target cells. This is the first report showing that VMF application might be a versatile system for testing different hypotheses in living systems, using appropriate exposure parameters.© 2022 Bioelectromagnetics Society.
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Affiliation(s)
- Diana I Aparicio-Bautista
- Laboratorio de Estructura de Proteínas, Instituto Nacional de Medicina Genómica, Ciudad de México, México
| | | | | | - Teodoro Córdova-Fraga
- División de Ciencias e Ingenierías, Universidad de Guanajuato, León, Guanajuato, México
| | - Juan P Reyes-Grajeda
- Laboratorio de Estructura de Proteínas, Instituto Nacional de Medicina Genómica, Ciudad de México, México
| | - Óscar Medina-Contreras
- Laboratorio de Investigación en Inmunología y Proteómica, Hospital Infantil de México Federico Gómez, Ciudad de México, México
| | - Fanny Rodríguez-Cruz
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) Unidad Zacatenco, Ciudad de México, México
| | - Francisco García-Sierra
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) Unidad Zacatenco, Ciudad de México, México
| | | | | | - Jaime Arellanes-Robledo
- CONACYT-Laboratorio de Enfermedades Hepáticas, Instituto Nacional de Medicina Genómica, Ciudad de México, México
| | - Gustavo Basurto-Islas
- División de Ciencias e Ingenierías, Universidad de Guanajuato, León, Guanajuato, México
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16
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Chen MY, Li J, Zhang N, Waldorff EI, Ryaby JT, Fedor P, Jia Y, Wang Y. In Vitro and in Vivo Study of the Effect of Osteogenic Pulsed Electromagnetic Fields on Breast and Lung Cancer Cells. Technol Cancer Res Treat 2022; 21:15330338221124658. [PMID: 36172744 PMCID: PMC9523832 DOI: 10.1177/15330338221124658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Introduction: Although there have been significant advances in research and treatments over the past decades, cancer remains a leading cause of morbidity and mortality, mostly due to resistance to standard therapies. Pulsed electromagnetic field (PEMF), a newly emerged therapeutic strategy, has been highly regarded as less invasive and almost safe to patients, is now a clinically accepted form to treat diseases including cancer. Breast and lung cancer are the most prevalent forms of human cancers, yet reported investigations on exploring regimes including PEMF are limited. Methods: Intended to examine the anti-tumor effects of a clinically accepted osteogenic PEMF and the possibility of including PEMF in breast and lung cancer treatments, we studied the effects of 2 PEMF signals (PMF1 and PMF2) on breast and lung cancer cell growth and proliferation, as well as the possible underline mechanisms in vitro and in vivo. Results: We found that both signals caused modest but significant growth inhibition (∼5%) in MCF-7 and A549 cancer cells. Interestingly, mice xenograft tumors with A549 cells treated by PEMF were smaller in sizes than controls. However, for mice with MCF-7 tumor implants, treatment with PMF1 resulted in a slight increase (2.8%) in mean tumor size, while PMF2 treated tumors showed a 9% reduction in average size. Furthermore, PEMF increased caspase 3/7 expression levels and percentage of annexin stained cells, indicating the induction of apoptosis. It also increased G0 by 8.5%, caused changes in the expression of genes associated with cell growth suppression, DNA damage, cell cycle arrest, and apoptosis. When cancer cells or xenograft tumors treated with combined PEMF and chemotherapy drugs, PEMF showed growth inhibition effect independent of cisplatin in A549 cells, but with added effect by pemetrexed for the inhibition of MCF-7 growth. Conclusion: Together, our data suggested that clinically used osteogenic PEMF signals moderately suppressed cancer cell growth and proliferation both in vitro and in vivo.
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Affiliation(s)
- Mike Y Chen
- Division of Neurosurgery, 20220City of Hope National Medical Center, Duarte, CA, USA
| | - Jing Li
- Division of Neurosurgery, 20220City of Hope National Medical Center, Duarte, CA, USA
| | | | | | | | - Philip Fedor
- Division of Neurosurgery, 20220City of Hope National Medical Center, Duarte, CA, USA
| | - Yongsheng Jia
- Division of Neurosurgery, 20220City of Hope National Medical Center, Duarte, CA, USA
| | - Yujun Wang
- Division of Neurosurgery, 20220City of Hope National Medical Center, Duarte, CA, USA
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17
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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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18
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Barati M, Darvishi B, Javidi MA, Mohammadian A, Shariatpanahi SP, Eisavand MR, Madjid Ansari A. Cellular stress response to extremely low-frequency electromagnetic fields (ELF-EMF): An explanation for controversial effects of ELF-EMF on apoptosis. Cell Prolif 2021; 54:e13154. [PMID: 34741480 PMCID: PMC8666288 DOI: 10.1111/cpr.13154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 09/21/2021] [Accepted: 10/12/2021] [Indexed: 12/12/2022] Open
Abstract
Impaired apoptosis is one of the hallmarks of cancer, and almost all of the non‐surgical approaches of eradicating tumour cells somehow promote induction of apoptosis. Indeed, numerous studies have stated that non‐ionizing non‐thermal extremely low‐frequency magnetic fields (ELF‐MF) can modulate the induction of apoptosis in exposed cells; however, much controversy exists in observations. When cells are exposed to ELF‐EMF alone, very low or no statistically significant changes in apoptosis are observed. Contrarily, exposure to ELF‐EMF in the presence of a co‐stressor, including a chemotherapeutic agent or ionizing radiation, can either potentiate or inhibit apoptotic effects of the co‐stressor. In our idea, the main point neglected in interpreting these discrepancies is “the cellular stress responses” of cells following ELF‐EMF exposure and its interplay with apoptosis. The main purpose of the current review was to outline the triangle of ELF‐EMF, the cellular stress response of cells and apoptosis and to interpret and unify discrepancies in results based on it. Therefore, initially, we will describe studies performed on identifying the effect of ELF‐EMF on induction/inhibition of apoptosis and enumerate proposed pathways through which ELF‐EMF exposure may affect apoptosis; then, we will explain cellular stress response and cues for its induction in response to ELF‐EMF exposure; and finally, we will explain why such controversies have been observed by different investigators.
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Affiliation(s)
- Mojdeh Barati
- Integrative Oncology Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Behrad Darvishi
- Recombinant Proteins Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Mohammad Amin Javidi
- Integrative Oncology Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Ali Mohammadian
- Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | | | - Mohammad Reza Eisavand
- Recombinant Proteins Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Alireza Madjid Ansari
- Integrative Oncology Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
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19
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Evaluation of Pulsed Electromagnetic Field Effects: A Systematic Review and Meta-Analysis on Highlights of Two Decades of Research In Vitro Studies. BIOMED RESEARCH INTERNATIONAL 2021; 2021:6647497. [PMID: 34368353 PMCID: PMC8342182 DOI: 10.1155/2021/6647497] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 05/30/2021] [Accepted: 06/27/2021] [Indexed: 12/13/2022]
Abstract
Pulsed electromagnetic field (PEMF) therapy is a type of physical stimulation that affects biological systems by producing interfering or coherent fields. Given that cell types are significantly distinct, which represents an important factor in stimulation, and that PEMFs can have different effects in terms of frequency and intensity, time of exposure, and waveform. This study is aimed at investigating if distinct positive and negative responses would correspond to specific characteristics of cells, frequency and flux density, time of exposure, and waveform. Necessary data were abstracted from the experimental observations of cell-based in vitro models. The observations were obtained from 92 publications between the years 1999 and 2019, which are available on PubMed and Web of Science databases. From each of the included studies, type of cells, pulse frequency of exposure, exposure flux density, and assayed cell responses were extracted. According to the obtained data, most of the experiments were carried out on human cells, and out of 2421 human cell experiments, cell changes were observed only in 51.05% of the data. In addition, the results pointed out the potential effects of PEMFs on some human cell types such as MG-63 human osteosarcoma cells (p value < 0.001) and bone marrow mesenchymal stem cells. However, human osteogenic sarcoma SaOS-2 (p < 0.001) and human adipose-derived mesenchymal stem cells (AD-MSCs) showed less sensitivity to PEMFs. Nevertheless, the evidence suggests that frequencies higher than 100 Hz, flux densities between 1 and 10 mT, and chronic exposure more than 10 days would be more effective in establishing a cellular response. This study successfully reported useful information about the role of cell type and signal characteristic parameters, which were of high importance for targeted therapies using PEMFs. Our findings would provide a deeper understanding about the effect of PEMFs in vitro, which could be useful as a reference for many in vivo experiments or preclinical trials.
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20
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An G, Shen M, Guo J, Miao X, Jing Y, Zhang K, Guo L, Xing J. Effects of pulsed electromagnetic fields on tumor cell viability: a meta-analysis of in vitro randomized controlled experiments. Electromagn Biol Med 2021; 40:467-474. [PMID: 34311647 DOI: 10.1080/15368378.2021.1958341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Malignant tumor treatment remains a big challenge till now, and expanding literature indicated that pulsed electromagnetic fields (PEMF) is promising in tumor treatment with the advantage of safety and being economical, but it is still controversial on whether PEMF could affect the tumor cell viability. Therefore, we conducted the meta-analysis to evaluate effects of PEMF on tumor cell viability. The PubMed, EMBASE, Web of Science, and Cochrane Library databases were searched for studies published up to February 2021. Studies on the direct effects of PEMF on tumor cell viability, determined using colorimetric analysis, were included. Two authors extracted the data and completed the quality assessment. A meta-analysis was performed to calculate the absorbance values and 95% confidence intervals (CIs) using random-effects models. Seven studies, including 32 randomized controlled experiments, were analyzed. Compared with the control group, tumor cell viability in the PEMF exposure group was obviously lower (SMD, -0.67; 95% CI: -1.12 to -0.22). The subgroup meta-analysis results showed that PEMF significantly reduced epithelial cancer cell viability (SMD, -0.58; 95% CI: -0.92 to -0.23) but had no influence on stromal tumor cell viability (SMD, -0.93; 95% CI: -0.21 to 0.15). Our study demonstrated that PEMF could inhibit tumor cell proliferation to some extent, but the risk of bias and high heterogeneity (I2 > 75%) weakened the strength of the conclusions drawn from the analysis.
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Affiliation(s)
- Guangzhou An
- Department of Radiation Protection Medicine, Shaanxi Key Laboratory of Free Radical Biology and Medicine, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an, Shaanxi Province, China
| | - Meilun Shen
- Department of Radiation Protection Medicine, Shaanxi Key Laboratory of Free Radical Biology and Medicine, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an, Shaanxi Province, China
| | - Juan Guo
- Department of Radiation Protection Medicine, Shaanxi Key Laboratory of Free Radical Biology and Medicine, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an, Shaanxi Province, China
| | - Xia Miao
- Department of Radiation Protection Medicine, Shaanxi Key Laboratory of Free Radical Biology and Medicine, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an, Shaanxi Province, China
| | - Yuntao Jing
- Department of Radiation Protection Medicine, Shaanxi Key Laboratory of Free Radical Biology and Medicine, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an, Shaanxi Province, China
| | - Keying Zhang
- Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi Province, China
| | - Ling Guo
- Department of Radiation Protection Medicine, Shaanxi Key Laboratory of Free Radical Biology and Medicine, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an, Shaanxi Province, China
| | - Junling Xing
- Department of Radiation Protection Medicine, Shaanxi Key Laboratory of Free Radical Biology and Medicine, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Faculty of Preventive Medicine, Air Force Medical University, Xi'an, Shaanxi Province, China
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21
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Oladnabi M, Mishan MA, Rezaeikanavi M, Zargari M, Sadeghi RN, Bagheri A. Correlation between ELF-PEMF exposure and Human RPE Cell Proliferation, Apoptosis and Gene Expression. J Ophthalmic Vis Res 2021; 16:202-211. [PMID: 34055258 PMCID: PMC8126745 DOI: 10.18502/jovr.v16i2.9084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 09/22/2020] [Indexed: 11/24/2022] Open
Abstract
Purpose Emerging evidence implies that electromagnetic fields (EMFs) can negatively affect angiogenesis. In this regard, the effects of extremely low frequency pulsed electromagnetic field (ELF-PEMF) exposure on the relative expression level of angiogenic factors involved in the pathogenesis of ocular disorders were evaluated in human retinal pigment epithelial (hRPE) cells in order to investigate a noninvasive therapeutic method for patients with several ocular diseases associated with neovascularization. Methods After separating hRPE cells from globes, hRPE cells were exposed to 15 mT of ELF-PEMF (120 Hz) at 5, 10, and 15 min for seven days. Cell proliferation and apoptosis of treated cells were evaluated via ELISA assay. Moreover, relative expression changes of HIF-1α, CTGF, VEGFA, MMP-2, cathepsin D, and E2F3 were performed using real-time RT-PCR. Results ELF-PEMF exposure had no significant effects on the apoptosis and proliferation rate of hRPE cells. Expression level of HIF-1α, CTGF, VEGFA, MMP-2, cathepsin D, and E2F3 was downregulated following 5 min of ELF-PEMF exposure. Conclusion As ELF-PEMF showed inhibitory effects on the expression of angiogenic genes in hRPE cells with no cytotoxic or proliferative side effects, it can be introduced as a useful procedure for managing angiogenesis induced by retinal pathogenesis, although more studies with adequate follow-up in animal models are needed.
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Affiliation(s)
- Morteza Oladnabi
- Stem Cell Research Center, Golestan University of Medical Sciences, Gorgan, Iran.,Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran.,Both authors contributed equally to the manuscript
| | - Mohammad Amir Mishan
- Ocular Tissue Engineering Research Center, Research Institute for Ophthalmology and Vision Science, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Both authors contributed equally to the manuscript
| | - Mozhgan Rezaeikanavi
- Ocular Tissue Engineering Research Center, Research Institute for Ophthalmology and Vision Science, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehryar Zargari
- Department of Clinical Biochemistry and Medical Genetics, Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Rouhallah Najjar Sadeghi
- Department of Clinical Biochemistry and Medical Genetics, Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Abouzar Bagheri
- Department of Clinical Biochemistry and Medical Genetics, Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
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22
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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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Dehghani-Soltani S, Eftekhar-Vaghefi SH, Babaee A, Basiri M, Mohammadipoor-Ghasemabad L, Vosough P, Ahmadi-Zeidabadi M. Pulsed and Discontinuous Electromagnetic Field Exposure Decreases Temozolomide Resistance in Glioblastoma by Modulating the Expression of O 6-Methylguanine-DNA Methyltransferase, Cyclin-D1, and p53. Cancer Biother Radiopharm 2020; 36:579-587. [PMID: 32644826 DOI: 10.1089/cbr.2020.3851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Background: Glioblastoma is a malignant and very aggressive brain tumor with a poor prognosis. Despite having chemotherapy concomitant with surgery and/or radiation therapy, the median survival of glioblastoma-affected people is less than 1 year. Temozolomide (TMZ) is a chemotherapeutic used as a first line treatment of glioblastoma. Several studies have reported that resistance to TMZ due to overexpression of O6-methylguanine-DNA methyltransferase (MGMT) is the main reason for treatment failure. Several studies described that pulsed-electromagnetic field (EMF) exposure could induce cell death and influence gene expression. Materials and Methods: In this study the authors assessed the effects of EMF (50 Hz, 70 G) on cytotoxicity, cell migration, gene expression, and protein levels in TMZ-treated T98 and A172 cell lines. Results: In this study, the authors show that treatment with a combination of TMZ and EMF enhanced cell death and decreased the migration potential of T98 and A172 cells. The authors also observed overexpression of the p53 gene and downregulation of cyclin-D1 protein in comparison to controls. In addition, T98 cells expressed the MGMT protein following treatment, while the A172 cells did not express MGMT. Conclusion: Their data indicate that EMF exposure improved the cytotoxicity of TMZ on T98 and A172 cells and could partially affect resistance to TMZ in T98 cells.
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Affiliation(s)
- Samereh Dehghani-Soltani
- Anatomical Sciences Department, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Seyed Hassan Eftekhar-Vaghefi
- Anatomical Sciences Department, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.,Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Abdolreza Babaee
- Anatomical Sciences Department, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohsen Basiri
- Anatomical Sciences Department, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | | | - Parisa Vosough
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Meysam Ahmadi-Zeidabadi
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
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24
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Xu A, Wang Q, Lin T. Low-Frequency Magnetic Fields (LF-MFs) Inhibit Proliferation by Triggering Apoptosis and Altering Cell Cycle Distribution in Breast Cancer Cells. Int J Mol Sci 2020; 21:ijms21082952. [PMID: 32331350 PMCID: PMC7215396 DOI: 10.3390/ijms21082952] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 02/06/2023] Open
Abstract
Breast cancer is a common malignancy threatening women’s health around the world. Despite improved treatments for different subtypes of breast tumors that have been put forward, there still exists a poor therapeutic response and prognosis. Magnetic fields, as a non-invasive therapy, have shown anti-tumor effects in vitro and in vivo; however, the detailed mechanisms involved are still not clear. In this study, we found that in exposure to low-frequency magnetic fields (LF-MFs) with an intensity of 1 mT and frequencies of 50, 125, 200, and 275 Hz, separately, the proliferation of breast cancer cells was inhibited and LF-MF with 200 Hz reached the optimum inhibition effect, on exposure time-dependently. Notably, we found that exposure to LF-MF led to MCF-7 and ZR-75-1 cell apoptosis and cell cycle arrest. Moreover, we also discovered that LF-MF effectively increased the level of reactive oxygen species (ROS), suppressed the PI3K/AKT signaling pathway, and activated glycogen synthase kinase-3β (GSK-3β). We demonstrated that the GSK3β activity contributed to LF-MF-induced cell proliferation inhibition and apoptosis, while the underlying mechanism was associated with the inhibition of PI3K/AKT through increasing the intracellular ROS accumulation. These results indicate that LF-MF with a specific frequency may be an attractive therapy to treat breast cancers.
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Affiliation(s)
- Aoshu Xu
- College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China; (A.X.); (Q.W.)
- Key Laboratory of Geophysics Exploration Equipment, Ministry of Education of China, Changchun 130061, China
| | - Qian Wang
- College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China; (A.X.); (Q.W.)
- Key Laboratory of Geophysics Exploration Equipment, Ministry of Education of China, Changchun 130061, China
| | - Tingting Lin
- College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China; (A.X.); (Q.W.)
- Key Laboratory of Geophysics Exploration Equipment, Ministry of Education of China, Changchun 130061, China
- Correspondence: ; Tel.: +86-135-0081-8835
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25
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Polymeric Composites Based on Carboxymethyl Cellulose Cryogel and Conductive Polymers: Synthesis and Characterization. JOURNAL OF COMPOSITES SCIENCE 2020. [DOI: 10.3390/jcs4020033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In this study, a super porous polymeric network prepared from a natural polymer, carboxymethyl cellulose (CMC), was used as a scaffold in the preparation of conductive polymers such as poly(Aniline) (PANi), poly(Pyrrole) (PPy), and poly(Thiophene) (PTh). CMC–conductive polymer composites were characterized by Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) techniques, and conductivity measurements. The highest conductivity was observed as 4.36 × 10−4 ± 4.63 × 10−5 S·cm−1 for CMC–PANi cryogel composite. The changes in conductivity of prepared CMC cryogel and its corresponding PAN, PPy, and PTh composites were tested against HCl and NH3 vapor. The changes in conductivity values of CMC cryogel upon HCl and NH3 vapor treatment were found to increase 1.5- and 2-fold, respectively, whereas CMC–PANi composites showed a 143-fold increase in conductivity upon HCl and a 12-fold decrease in conductivity upon NH3 treatment, suggesting the use of natural polymer–conductive polymer composites as sensor for these gases.
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26
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Induction of apoptosis and ferroptosis by a tumor suppressing magnetic field through ROS-mediated DNA damage. Aging (Albany NY) 2020; 12:3662-3681. [PMID: 32074079 PMCID: PMC7066880 DOI: 10.18632/aging.102836] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/27/2020] [Indexed: 12/12/2022]
Abstract
Magnetic field (MF) is being used in antitumor treatment; however, the underlying biological mechanisms remain unclear. In this study, the potency and mechanism of a previously published tumor suppressing MF exposure protocol were further investigated. This protocol, characterized as a 50 Hz electromagnetic field modulated by static MF with time-average intensity of 5.1 mT, when applied for 2 h daily for over 3 consecutive days, selectively inhibited the growth of a broad spectrum of tumor cell lines including lung cancer, gastric cancer, pancreatic cancer and nephroblastoma. The level of intracellular reactive oxygen species (ROS) increased shortly after field exposure and persisted. Subsequently, pronounced DNA damage and activation of DNA repair pathways were identified both in vitro and in vivo. Furthermore, use of free radical scavenger alleviated DNA damage and partially reduced cell death. Finally, this field was found to inhibit cell proliferation, and simultaneously induced two types of programmed cell death, apoptosis and ferroptosis. In conclusion, this tumor suppressing MF could determine cell fate through ROS-induced DNA damage, inducing oxidative stress and activation of the DNA damage repair pathways, eventually lead to apoptosis and ferroptosis, as well as inhibition of tumor growth.
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27
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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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28
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Verginadis II, Karkabounas SC, Simos YV, Velalopoulou AP, Peschos D, Avdikos A, Zelovitis I, Papadopoulos N, Dounousi E, Ragos V, Evangelou AM. Antitumor effects of the electromagnetic resonant frequencies derived from the 1H NMR spectrum of Ph 3Sn(Mercaptonicotinic)SnPh 3 complex. Med Hypotheses 2019; 133:109393. [PMID: 31563097 DOI: 10.1016/j.mehy.2019.109393] [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: 06/28/2019] [Revised: 09/01/2019] [Accepted: 09/05/2019] [Indexed: 10/26/2022]
Abstract
The aim of this article is to investigate the potential cytotoxic and antitumor effects of the resonant electromagnetic fields (rEMFs) derived from the 1H NMR spectrum of the Ph3Sn(Mercaptonicotinic)SnPh3 complex (SnMNA). The ability of the complex's rEMFs to induce leiomyosarcoma (LMS) cell death and to recess tumor (leiomyosarcoma) development in Wistar rats was evaluated. The effects of the simultaneous administration of the SnMNA complex at extremely low concentrations and exposure to its rEMFs was also investigated. The emission of the 1H NMR spectrum of the complex alone or in a combination with low ineffective doses of the complex decreased LMS cell viability mainly through apoptosis. Moreover, the results from the in vivo experiments showed a significant prolongation of life expectancy in tumor-bearing rats exposed to the rEMFs alongside a deceleration in tumor growth rate. We speculate that the rEMFs of a biologically active substance could exert similar biological effects as the substance itself, mainly when is combined with extremely low ineffective concentrations of the substance.
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Affiliation(s)
- Ioannis I Verginadis
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Spyridon Ch Karkabounas
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Yannis V Simos
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Anastasia P Velalopoulou
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Dimitrios Peschos
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Antonis Avdikos
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Ioannis Zelovitis
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Nikolaos Papadopoulos
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Evangelia Dounousi
- Department of Nephrology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece
| | - Vasilios Ragos
- Clinic of Maxillofacial Surgery, Medical Department, University of Ioannina, Ioannina 45110, Ioannina, Greece
| | - Angelos M Evangelou
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Ioannina, 45110 Ioannina, Greece.
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The extremely low frequency electromagnetic stimulation selective for cancer cells elicits growth arrest through a metabolic shift. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1866:1389-1397. [DOI: 10.1016/j.bbamcr.2019.05.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/09/2019] [Accepted: 05/29/2019] [Indexed: 02/07/2023]
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Frantsiyants EM, Sheiko EA. ANTITUMOR EFFECT OF ELECTROMAGNETIC FIELDS AND THEIR EFFECT ON PAIN IN EXPERIMENTAL AND CLINICAL ONCOLOGY. RESEARCH'N PRACTICAL MEDICINE JOURNAL 2019. [DOI: 10.17709/2409-2231-2019-6-2-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The review examined and analyzed scientific publications on the effect of electromagnetic fields (EMF) on various systems of the human body and animals with tumors, as well as on pain in the experiment and the clinic. The theoretical foundations and practical results of the use of EMF in various modulations and modes in the goals and objectives of oncology, including how to optimize the process of anesthesia and correct the vital activity of the body's functional systems with a tumor, are consecrated. Information is given on possible physicochemical effects, features, and mechanisms of therapeutic influence at various levels of a living organism. The ability of electromagnetic waves to transfer information both within a single biosystem and at the level of a whole living organism with a tumor is shown. Studies of combined action of EMF and chemotherapy were analyzed. It has been established that there are experimental prerequisites for using this factor in order to induce changes in the permeability of the membranes of tumor cells by increasing the internalization of chemotherapeutic agents and, thus, enhance the antitumor effect. The role of EMF in the induction of apoptosis in tumor cells is shown. It has been shown that chemotherapy together with electromagnetic fields induces apoptosis and has an inhibitory effect on DNA synthesis in osteosarcoma cells, breast cancer, colon cancer, melanoma and other tumors. The role of magnetic fields in order to enhance the analgesic effect was investigated. The analgesic effect is due to the cessation or weakening of nerve impulses from the painful focus due to the elimination of hypoxia, the improvement of microcirculation, and the reduction of edema, it has been shown. Transcranial magnetic therapy is used as an analgesic tool in onconurology. The therapeutic anti-pain effect is associated with the stimulation of the antinociceptive system, an increase in the synthesis of natural analgesics — endorphins with their subsequent release into the cerebrospinal fluid and blood. As it has already been shown, with the increase in the intensity of pain and its duration, all indicators of the quality of life and the results of treatment of the patient deteriorate, so the search for ways to improve the antitumor effectiveness of specialized treatment and eliminate the causes that prevent their implementation continue to be relevant and in demand.
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Significant Cellular Viability Dependence on Time Exposition at ELF-EMF and RF-EMF In Vitro Studies. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16122085. [PMID: 31200435 PMCID: PMC6617398 DOI: 10.3390/ijerph16122085] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 06/07/2019] [Accepted: 06/09/2019] [Indexed: 02/06/2023]
Abstract
The human concern about the effect of electromagnetic fields (EMFs) has changed over time from the effects produced by EMFs of extremely low frequencies (ELFs) to the effects produced by exposure to a radio frequency (RF), with concerns shifting toward EMFs due to the development of new technologies and forms of communication. Previous studies have analysed the effects produced at different frequencies without considering in detail the effect of the time of exposure. Therefore, in the present study, we analysed in vitro the effect produced by a 100 µT EMF at different ELFs and exposure times in glioblastomas, as well as the effect produced in a fibroblast by an RF-EMF of 2.54 GHz. Our results indicate a significant time dependence in cell viability of fibroblasts exposed to an RF-EMF of 2.54 GHz and a non-time-dependent effect in cell viability of glioblastomas exposed to an ELF-EMF, highlighting the possible relation between frequency and time of exposure.
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Ahmadi-Zeidabadi M, Akbarnejad Z, Esmaeeli M, Masoumi-Ardakani Y, Mohammadipoor-Ghasemabad L, Eskandary H. Impact of extremely low-frequency electromagnetic field (100 Hz, 100 G) exposure on human glioblastoma U87 cells during Temozolomide administration. Electromagn Biol Med 2019; 38:198-209. [PMID: 31179753 DOI: 10.1080/15368378.2019.1625784] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Glioblastoma multiforme (GBM) is a highly malignant brain tumor with an extremely dismal prognosis, a median survival is12 months. Temozolomide (TMZ) is an alkylating agent widely used to treat cancer, resistance to this drug is often found. One unexplored possibility for overcoming this resistance is a treatment based on concomitant exposure to electromagnetic fields (EMF) and TMZ. Indeed, many evidences show that EMF affects cancer cells and drug performance. Therefore, the present study was carried out to evaluate the potential synergistic effect of 100 µM TMZ and EMF (100 Hz, 100 G) on human glioma cell line U87 U87 cells with four experimental groups (I-IV) were exposed to ELF-EMF and TMZ for 120 and 144 h, as follows: (I) control; (II) ELF-EMF; (III) TMZ; (IV) ELF-PEMFs / TMZ. mRNA expression of genes such as (Nestin,CD133, Notch4 and GFAP) were investigated by Real-time PCR and western blot. We also evaluated, SOD activity, MDA and calcium concentration by ELISA assay. Co-treatment synergistically decreased the expression of Nestin,CD133, and Notch4 and increased the GFAP genes. We also observed an increase in Superoxide dismutase (SOD) activity, Malondialdehyde (MDA) and Ca2+concentration in comparison to controls.TMZ prevents cancer progression not only through the induction of cell death, but also by inducing differentiation in cancer cells. In addition, our data demonstrate ELF-EMF (100 Hz, 100 G) can significantly enhance the effects of TMZ on human glioblastoma U87 cell. These findings may open new window for future studies.
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Affiliation(s)
- Meysam Ahmadi-Zeidabadi
- a Neuroscience Research Center, Institute of Neuropharmacology , Kerman University of Medical Sciences , Kerman , Iran
| | - Zeinab Akbarnejad
- b ENT and Head & Neck Research center and department, Hazrat Rasoul Hospital , The five senses Institute, Iran University of medical sciences , Tehran , Iran
| | - Marzie Esmaeeli
- a Neuroscience Research Center, Institute of Neuropharmacology , Kerman University of Medical Sciences , Kerman , Iran
| | - Yaser Masoumi-Ardakani
- c Physiology Research Center, Institute of Basic and Clinical Physiology Science , Kerman University of Medical Sciences , Kerman , Iran
| | | | - Hossein Eskandary
- a Neuroscience Research Center, Institute of Neuropharmacology , Kerman University of Medical Sciences , Kerman , Iran.,e Afzal Research Institute (NGO) , Kerman , Iran
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33
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Makinistian L, Marková E, Belyaev I. A high throughput screening system of coils for ELF magnetic fields experiments: proof of concept on the proliferation of cancer cell lines. BMC Cancer 2019; 19:188. [PMID: 30819144 PMCID: PMC6396543 DOI: 10.1186/s12885-019-5376-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 02/18/2019] [Indexed: 12/26/2022] Open
Abstract
Background It has been demonstrated that relatively small variations of the parameters of exposure to extremely low frequency magnetic fields (ELF-MF) can change significantly the outcome of experiments. Hence, either in trying to elucidate if these fields are carcinogenic, or in exploring their possible therapeutic use, it is desirable to screen through as many different exposures as possible. The purpose of this work is to provide a proof of concept of how a recently reported system of coils allows testing different field exposures, in a single experiment. Methods Using a novel exposure system, we subjected a glioblastoma cancer cell line (U251) to three different time modulations of an ELF-MF at 60 different combinations of the alternated current (AC) and direct current (DC) components of the field. One of those three time modulations was also tested on another cell line, MDA-MB-231 (breast cancer). After exposure, proliferation was assessed by colorimetric assays. Results For the U251 cells, a total of 180 different exposures were tested in three different experiments. Depending on exposure modulation and AC field intensity (but, remarkably, not on DC intensity), we found the three possible outcomes: increase (14.3% above control, p < 0.01), decrease (16.6% below control, p < 0.001), and also no-effect on proliferation with respect to control. Only the time modulation that inhibited proliferation of U251 was also tested on MDA-MB-231 cells which, in contrast, showed no alteration of their proliferation on any of the 60 AC/DC field combinations tested. Conclusions We demonstrated, for the first time, the use of a novel system of coils for magnetobiology research, which allowed us to find that differences of only a few μT resulted in statistically different results. Not only does our study demonstrate the relevance of the time modulation and the importance of finely sweeping through the AC and DC amplitudes, but also, and most importantly, provides a proof of concept of a system that sensibly reduces the time and costs of screening. Electronic supplementary material The online version of this article (10.1186/s12885-019-5376-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Leonardo Makinistian
- Department of Radiobiology, Cancer Research Institute, Biomedical Center, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05, Bratislava, Slovakia.,Department of Physics and Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis-CONICET, Ejército de los Andes 950, CP5700, San Luis, Argentina
| | - Eva Marková
- Department of Radiobiology, Cancer Research Institute, Biomedical Center, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05, Bratislava, Slovakia
| | - Igor Belyaev
- Department of Radiobiology, Cancer Research Institute, Biomedical Center, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05, Bratislava, Slovakia.
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Consales C, Panatta M, Butera A, Filomeni G, Merla C, Carrì MT, Marino C, Benassi B. 50-Hz magnetic field impairs the expression of iron-related genes in the in vitro SOD1 G93A model of amyotrophic lateral sclerosis. Int J Radiat Biol 2019; 95:368-377. [PMID: 30513241 DOI: 10.1080/09553002.2019.1552378] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE We characterized the response to the extremely low frequency magnetic field (ELF-MF) in an in vitro model of familial Amyotrophic Lateral Sclerosis (fALS), carrying two mutant variants of the superoxide dismutase 1 (SOD1) gene. MATERIALS AND METHODS SH-SY5Y human neuroblastoma cells, stably over-expressing the wild type, the G93A or the H46R mutant SOD1 cDNA, were exposed to either the ELF-MF (50 Hz, 1 mT) or the sham control field, up to 72 h. Analysis of (i) viability, proliferation and apoptosis, (ii) reactive oxygen species generation, and (iii) assessment of the iron metabolism, were carried out in all clones in response to the MF exposure. RESULTS We report that 50-Hz MF exposure induces: (i) no change in proliferation and viability; (ii) no modulation of the intracellular superoxide and H2O2 levels; (iii) a significant deregulation in the expression of iron-related genes IRP1, MFRN1 and TfR1, this evidence being exclusive for the SOD1G93A clone and associated with a slight (p = .0512) difference in the total iron content. CONCLUSIONS 50-Hz MF affects iron homeostasis in the in vitro SOD1G93A ALS model.
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Affiliation(s)
- Claudia Consales
- a Department of Energy and Sustainable Economic Development , Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies , Rome , Italy
| | - Martina Panatta
- a Department of Energy and Sustainable Economic Development , Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies , Rome , Italy.,b Department of Chemistry and Biochemistry , University of Bern , Bern , Switzerland
| | - Alessio Butera
- a Department of Energy and Sustainable Economic Development , Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies , Rome , Italy
| | - Giuseppe Filomeni
- c Department of Biology , University of Rome Tor Vergata , Rome , Italy.,d Cell Stress and Survival Unit, Center for Autophagy, Recycling and Disease (CARD) , Danish Cancer Society Research Center , Copenhagen , Denmark
| | - Caterina Merla
- a Department of Energy and Sustainable Economic Development , Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies , Rome , Italy
| | | | - Carmela Marino
- a Department of Energy and Sustainable Economic Development , Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies , Rome , Italy
| | - Barbara Benassi
- a Department of Energy and Sustainable Economic Development , Division of Health Protection Technologies, ENEA-Italian National Agency for New Technologies , Rome , Italy
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Sengupta S, Balla VK. A review on the use of magnetic fields and ultrasound for non-invasive cancer treatment. J Adv Res 2018; 14:97-111. [PMID: 30109147 PMCID: PMC6090088 DOI: 10.1016/j.jare.2018.06.003] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 06/19/2018] [Accepted: 06/19/2018] [Indexed: 12/23/2022] Open
Abstract
Current popular cancer treatment options, include tumor surgery, chemotherapy, and hormonal treatment. These treatments are often associated with some inherent limitations. For instances, tumor surgery is not effective in mitigating metastases; the anticancer drugs used for chemotherapy can quickly spread throughout the body and is ineffective in killing metastatic cancer cells. Therefore, several drug delivery systems (DDS) have been developed to target tumor cells, and release active biomolecule at specific site to eliminate the side effects of anticancer drugs. However, common challenges of DDS used for cancer treatment, include poor site-specific accumulation, difficulties in entering the tumor microenvironment, poor metastases and treatment efficiency. In this context, non-invasive cancer treatment approaches, with or without DDS, involving the use of light, heat, magnetic field, electrical field and ultrasound appears to be very attractive. These approaches can potentially improve treatment efficiency, reduce recovery time, eliminate infections and scar formation. In this review we focus on the effects of magnetic fields and ultrasound on cancer cells and their application for cancer treatment in the presence of drugs or DDS.
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Affiliation(s)
- Somoshree Sengupta
- Bioceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute, 196 Raja S.C. Mullick Road, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Glass and Ceramic Research Institute Campus, 196 Raja S.C. Mullick Road, Kolkata 700032, India
| | - Vamsi K. Balla
- Bioceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute, 196 Raja S.C. Mullick Road, Kolkata 700032, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Glass and Ceramic Research Institute Campus, 196 Raja S.C. Mullick Road, Kolkata 700032, India
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Comparative Analysis of Biological Effects Induced on Different Cell Types by Magnetic Fields with Magnetic Flux Densities in the Range of 1–60 mT and Frequencies up to 50 Hz. SUSTAINABILITY 2018. [DOI: 10.3390/su10082776] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Moderate static magnetic fields (SMFs) are generated from sources such as new-generation electric trams and trains, electric arc welding, and magnetic resonance imaging (MRI) devices, as well as during the industrial production of aluminium, while extremely low frequency pulsed magnetic fields (ELF-PMFs) are produced by house power installations, household appliances, and high voltages transmission lines. Moderate SMFs and ELF-PMFs with magnetic flux densities (B) in the range of 1–60 mT and frequencies (f) up to 50 Hz are common MF exposure sources for the population. Even though humans are continually exposed to these MFs, to date no definitive endpoint has been drawn about their safety. In this review, the state of knowledge about the biological effects induced by these MFs on different cell types will be addressed. In our own observation, the putative modulation of Ca2+/H+ and Na+/H+ plasma membrane antiporters of human peripheral blood lymphocytes (PBLs) was found to occur after a 24 h exposure to a 6 mT SMF, and the bystander effect observed on U937 cells cultivated for up to 6 h in the conditioned medium harvested from human PBLs previously exposed for 24 h to the same MF (secondary necrosis induction) will be also herein discussed.
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37
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Amiri M, Basiri M, Eskandary H, Akbarnejad Z, Esmaeeli M, Masoumi-Ardakani Y, Ahmadi-Zeidabadi M. Cytotoxicity of carboplatin on human glioblastoma cells is reduced by the concomitant exposure to an extremely low-frequency electromagnetic field (50 Hz, 70 G). Electromagn Biol Med 2018; 37:138-145. [DOI: 10.1080/15368378.2018.1477052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Maryam Amiri
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
- Department of Anatomy, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohsen Basiri
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
- Department of Anatomy, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Hossein Eskandary
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Zeinab Akbarnejad
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Marzie Esmaeeli
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Yaser Masoumi-Ardakani
- Physiology Research center, Institute of Basic and Clinical physiology Science, Kerman University of Medical Sciences, Kerman, Iran
| | - Meysam Ahmadi-Zeidabadi
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
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38
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Falone S, Santini S, Cordone V, Cesare P, Bonfigli A, Grannonico M, Di Emidio G, Tatone C, Cacchio M, Amicarelli F. Power frequency magnetic field promotes a more malignant phenotype in neuroblastoma cells via redox-related mechanisms. Sci Rep 2017; 7:11470. [PMID: 28904402 PMCID: PMC5597619 DOI: 10.1038/s41598-017-11869-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 08/29/2017] [Indexed: 12/27/2022] Open
Abstract
In accordance with the classification of the International Agency for Research on Cancer, extremely low frequency magnetic fields (ELF-MF) are suspected to promote malignant progression by providing survival advantage to cancer cells through the activation of critical cytoprotective pathways. Among these, the major antioxidative and detoxification defence systems might be targeted by ELF-MF by conferring cells significant resistance against clinically-relevant cytotoxic agents. We investigated whether the hyperproliferation that is induced in SH-SY5Y human neuroblastoma cells by a 50 Hz, 1 mT ELF magnetic field was supported by improved defence towards reactive oxygen species (ROS) and xenobiotics, as well as by reduced vulnerability against both H2O2 and anti-tumor ROS-generating drug doxorubicin. ELF-MF induced a proliferative and survival advantage by activating key redox-responsive antioxidative and detoxification cytoprotective pathways that are associated with a more aggressive behavior of neuroblastoma cells. This was coupled with the upregulation of the major sirtuins, as well as with increased signaling activity of the erythroid 2-related nuclear transcription factor 2 (NRF2). Interestingly, we also showed that the exposure to 50 Hz MF as low as 100 µT may still be able to alter behavior and responses of cancer cells to clinically-relevant drugs.
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Affiliation(s)
- S Falone
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.
| | - S Santini
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - V Cordone
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - P Cesare
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - A Bonfigli
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - M Grannonico
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - G Di Emidio
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - C Tatone
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - M Cacchio
- Department of Neurosciences, Imaging and Clinical Sciences, University "G. d'Annunzio", Chieti Scalo (CH), Italy
| | - F Amicarelli
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
- Institute of Translational Pharmacology (IFT) - CNR, L'Aquila, Italy
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