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Hu X, Su Y, Xu J, Cheng YY, Liu T, Li X, Ma X, Chen Z, Song K. Electromagnetic field-mediated chitosan/gelatin/nano-hydroxyapatite and bone-derived scaffolds regulate the osteoblastic and chondrogenic phenotypes of adipose-derived stem cells to construct osteochondral tissue engineering niche in vitro. Int J Biol Macromol 2024; 258:128829. [PMID: 38128807 DOI: 10.1016/j.ijbiomac.2023.128829] [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: 10/01/2023] [Revised: 11/17/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
It is critical to explore the effects of electromagnetic field (EMF) on the construction of functional osteochondral tissue, which has shown certain clinical significance for the treatment of osteochondral injury. At present, there are few studies on the effect of the direction of EMF on cells. This study aimed to investigate the effects of EMF coupling on different parameters to control adipose-derived stem cells (ADSCs) proliferation and specific chondrogenic and osteogenic differentiation at 2D level and 3D level. The proliferation and differentiation of EMF-induced ADSCs are jointly regulated by EMF and space structure. In this study, Cs7/Gel3/nHAP scaffolds were prepared with good degradation rate (86.75 ± 4.96 %) and absorb water (1100 %), and the pore size was 195.63 ± 54.72 μm. The bone-derived scaffold with a pore size of 267.17 ± 129.18 μm was obtained and its main component was hydroxyapatite. Cs7/Gel3/nHAP scaffolds and bone-derived scaffolds are suitable as 3D level materials. The optimal EMF intensity was 2 mT for chondrogenic differentiation and proliferation and 1 mT for osteogenic differentiation and proliferation. It is noteworthy that EMF has a negative correlation with ADSCs proliferation in the vertical direction at 2D level, while it has a positive correlation with ADSCs proliferation at 3D level. EMF mediated 3D osteochondral scaffold provide good strategy for osteochondral tissue engineering construction.
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Affiliation(s)
- Xueyan Hu
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China
| | - Ya Su
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jie Xu
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yuen Yee Cheng
- Institute for Biomedical Materials and Devices, Faculty of Science, University of Technology Sydney, NSW 2007, Australia
| | - Tianqing Liu
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xiangqin Li
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China.
| | - Xiao Ma
- Department of Anesthesia, First Affiliated Hospital of Dalian Medical University, Dalian 116011, China.
| | - Zhen Chen
- Clinical Laboratory, First Affiliated Hospital of Dalian Medical University, Dalian 116011, China.
| | - Kedong Song
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, China.
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2
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Irani M, Aradmehr M, Ghorbani M, Baghani R. Electromagnetic Field Exposure and Abortion in Pregnant Women: A Systematic Review and Meta-Analysis. Malays J Med Sci 2023; 30:70-80. [PMID: 37928787 PMCID: PMC10624444 DOI: 10.21315/mjms2023.30.5.6] [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: 01/26/2022] [Accepted: 05/09/2022] [Indexed: 11/07/2023] Open
Abstract
This study examined the effects of exposure to electromagnetic fields (EMF) on pregnancy and the risk of miscarriage. We performed a systematic search for relevant studies published to August 2021 in the medical databases of PubMed, CINAHL, Scopus, Web of Science, Google Scholar and Cochrane Library. The following key terms were used: 'electromagnetic field,' 'mobile phones,' 'mobile phone base stations,' 'watching TV,' 'using Internet,' 'miscarriage,' 'abortions,' 'spontaneous abortion,' 'early abortion' and 'late abortion'. All case-control and cohort studies that investigated the effect of EMF exposure on the risk of miscarriage were included without any restriction of language or time. Statistical analyses were done using Comprehensive Meta-Analysis software (version 2.0). A random-effects model was performed to calculate the overall effect size. A primary search revealed a total of 982 relevant studies; six articles (N = 3,187 participants) met the inclusion criteria for the meta-analysis. The results of the random-effects meta-analysis indicated that EMF exposure had a significant effect on miscarriage: rate ratio (RR) = 1.699; 95% confidence interval (CI): 1.121, 2.363 (P < 0.001); and heterogeneity (I2) = 84.55% (P < 0.001). The findings showed that pregnant woman who were exposed to high levels of EMF had an increased risk of miscarriage.
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Affiliation(s)
- Morvarid Irani
- Department of Midwifery, School of Nursing and Midwifery, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
- Health Sciences Research Center, School of Health, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Maryam Aradmehr
- Department of Midwifery, School of Nursing and Midwifery, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
- Health Sciences Research Center, School of Health, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Mohammad Ghorbani
- Health Sciences Research Center, School of Health, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Roya Baghani
- Department of Midwifery, School of Nursing and Midwifery, Shahroud University of Medical Sciences, Shahroud, Iran
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Huang S, Zhang J, Pi J, Gong L, Zhu G. Long-term electricity generation and denitrification performance of MFCs with different exchange membranes and electrode materials. Bioelectrochemistry 2021; 140:107748. [PMID: 33609890 DOI: 10.1016/j.bioelechem.2021.107748] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 11/16/2022]
Abstract
Different biocathode electrode materials (graphite felt and carbon brush, GF and CB) and exchange membranes (proton exchange membrane and cation exchange membrane, PEM and CEM) were used in three microbial fuel cell (MFC) configurations operated for 300-days to investigate the power generation and the COD and N removal performance. Results showed no effect on the COD removal (all above 96%); however, the power generation (46.11 mW·h) and denitrification performance (68.0 ± 1.6%) of the MFC-B (GF + PEM) system were higher than those of the other systems (MFC-A: CB + PEM; MFC-C: CB + CEM) (P < 0.01), and the power generation and denitrification performance of all three systems decreased with time (P < 0.01). By analyzing the physicochemical properties of the exchange membrane and cathode electrode materials, the reasons that affect the power generation performance of the system were clarified. Furthermore, the increase in bioelectricity enhanced the electricity-related nitrification and denitrification reactions. The average 300-day unit denitrification cost of MFC-A was 4.2 and 6.3 times that of MFC-B and MFC-C, respectively. Comprehensive consideration of electricity generation, denitrification, and service life, combined with cost analysis and better selection of construction materials, provides a theoretical basis for the long-term stable operation and sustainable application of MFCs.
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Affiliation(s)
- Shan Huang
- School of Energy and Environment, Southeast University, Nanjing 210096, China; State Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China.
| | - Jingran Zhang
- School of Energy and Environment, Southeast University, Nanjing 210096, China.
| | - Jiachang Pi
- School of Energy and Environment, Southeast University, Nanjing 210096, China; State Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China.
| | - Liying Gong
- School of Energy and Environment, Southeast University, Nanjing 210096, China; State Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China.
| | - Guangcan Zhu
- School of Energy and Environment, Southeast University, Nanjing 210096, China; State Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China.
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4
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Cruciani S, Garroni G, Ventura C, Danani A, Nečas A, Maioli M. Stem cells and physical energies: can we really drive stem cell fate? Physiol Res 2020; 68:S375-S384. [PMID: 32118467 DOI: 10.33549/physiolres.934388] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Adult stem cells are undifferentiated elements able to self-renew or differentiate to maintain tissue integrity. Within this context, stem cells are able to divide in a symmetric fashion, feature characterising all the somatic cells, or in an asymmetric way, which leads daughter cells to different fates. It is worth highlighting that cell polarity have a critical role in regulating stem cell asymmetric division and the proper control of cell division depends on different proteins involved in cell development, differentiation and maintenance of tissue homeostasis. Moreover, the interaction between cells and the extracellular matrix are crucial in influencing cell behavior, included in terms of mechanical properties as cytoskeleton plasticity and remodelling, and membrane tension. Finally, the activation of specific transcriptional program and epigenetic modifications contributes to cell fate determination, through modulation of cellular signalling cascades. It is well known that physical and mechanical stimuli are able to influence biological systems, and in this context, the effects of electromagnetic fields (EMFs) have already shown a considerable role, even though there is a lack of knowledge and much remains to be done around this topic. In this review, we summarize the historical background of EMFs applications and the main molecular mechanism involved in cellular remodelling, with particular attention to cytoskeleton elasticity and cell polarity, required for driving stem cell behavior.
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Affiliation(s)
- S Cruciani
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy.
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5
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Tang JY, Yeh TW, Huang YT, Wang MH, Jang LS. Effects of extremely low-frequency electromagnetic fields on B16F10 cancer cells. Electromagn Biol Med 2019; 38:149-157. [PMID: 30889982 DOI: 10.1080/15368378.2019.1591438] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
This paper presents a method to inhibit B16F10 cancer cells using extremely low-frequency electromagnetic fields (ELF-EMFs) and to evaluate cell viability using MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay. The study examined the effect of a natural EMF resonance frequency (7.83 Hz) and a power line frequency (60 Hz) on B16F10 cancer cells for 24 and 48 h. The B16F10 cancer cells were also exposed to sweep frequencies in several sweep intervals to quantitatively analyze the viability of cancer cells. The results yielded a 17% inhibition rate under 7.83 Hz compared with that of the control group. Moreover, sweep frequencies in narrow intervals (7.83 ± 0.1 Hz for the step 0.05 Hz) caused an inhibition rate of 26.4%, and inhibitory effects decreased as frequency sweep intervals increased. These results indicate that a Schumann resonance frequency of 7.83 Hz can inhibit the growth of cancer cells and that using a specific frequency type can lead to more effective growth inhibition.
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Affiliation(s)
- Jing-Yau Tang
- a Department of Electrical Engineering , National Cheng Kung University , Tainan , Taiwan
| | - Te-Wei Yeh
- a Department of Electrical Engineering , National Cheng Kung University , Tainan , Taiwan
| | - Yu-Ting Huang
- a Department of Electrical Engineering , National Cheng Kung University , Tainan , Taiwan
| | - Min-Haw Wang
- b Department of Electrical Engineering , Chinese Culture University , Taipei , Taiwan
| | - Ling-Sheng Jang
- a Department of Electrical Engineering , National Cheng Kung University , Tainan , Taiwan
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6
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Wang YY, Pu XY, Shi WG, Fang QQ, Chen XR, Xi HR, Gao YH, Zhou J, Xian CJ, Chen KM. Pulsed electromagnetic fields promote bone formation by activating the sAC-cAMP-PKA-CREB signaling pathway. J Cell Physiol 2019; 234:2807-2821. [PMID: 30067871 DOI: 10.1002/jcp.27098] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 06/28/2018] [Indexed: 02/06/2023]
Abstract
The application of pulsed electromagnetic fields (PEMFs) in the prevention and treatment of osteoporosis has long been an area of interest. However, the clinical application of PEMFs remains limited because of the poor understanding of the PEMF action mechanism. Here, we report that PEMFs promote bone formation by activating soluble adenylyl cyclase (sAC), cyclic adenosine monophosphate (cAMP), protein kinase A (PKA), and cAMP response element-binding protein (CREB) signaling pathways. First, it was found that 50 Hz 0.6 millitesla (mT) PEMFs promoted osteogenic differentiation of rat calvarial osteoblasts (ROBs), and that PEMFs activated cAMP-PKA-CREB signaling by increasing intracellular cAMP levels, facilitating phosphorylation of PKA and CREB, and inducing nuclear translocation of phosphorylated (p)-CREB. Blocking the signaling by adenylate cyclase (AC) and PKA inhibitors both abolished the osteogenic effect of PEMFs. Second, expression of sAC isoform was found to be increased significantly by PEMF treatment. Blocking sAC using sAC-specific inhibitor KH7 dramatically inhibited the osteogenic differentiation of ROBs. Finally, the peak bone mass of growing rats was significantly increased after 2 months of PEMF treatment with 90 min/day. The serum cAMP content, p-PKA, and p-CREB as well as the sAC protein expression levels were all increased significantly in femurs of treated rats. The current study indicated that PEMFs promote bone formation in vitro and in vivo by activating sAC-cAMP-PKA-CREB signaling pathway of osteoblasts directly or indirectly.
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Affiliation(s)
- Yuan-Yuan Wang
- Department of Bioengineering, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Xiu-Ying Pu
- Department of Bioengineering, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Wen-Gui Shi
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Qing-Qing Fang
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Xin-Ru Chen
- Department of Biology, College of Life Sciences, Northwest A & F University, Yanglin, China
| | - Hui-Rong Xi
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Yu-Hai Gao
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Jian Zhou
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
| | - Cory J Xian
- Sansom Institute for Health Research, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Ke-Ming Chen
- Institute of Orthopaedics, Lanzhou General Hospital of CPLA, Lanzhou, China
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7
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Khoshroo MMZ, Mehrjan MS, Samiee F, Soltani M, Shekarabi SPH. Some immunological responses of common carp (Cyprinus carpio) fingerling to acute extremely low-frequency electromagnetic fields (50 Hz). FISH PHYSIOLOGY AND BIOCHEMISTRY 2018; 44:235-243. [PMID: 29022155 DOI: 10.1007/s10695-017-0429-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Increasing of anthropogenic electromagnetic fields in aquatic environments has been recently become the core of attention. In this study, the effect of extremely low-frequency electromagnetic fields (50 Hz) on immune status and metabolic markers of common carp fingerling was assessed. The fish were exposed to extremely low-frequency electromagnetic fields at four intensities of 0.1, 0.5, 1, and 2 mT only once for 2 h; then, they were reared for 60 days. Results showed that the levels of aspartate aminotransferase (AST) and alanine transaminase (ALT) and alkaline phosphatase (ALP) were increased with an increase in the electromagnetic field intensity on 15 and 60 days post exposure. A significant increase was obtained in these enzyme levels in all the tested intensities compared to the control one (p < 0.05), with a maximum value measured in 2-mT trail. Conversely, with an increasing in the electromagnetic intensity, the levels of C3, C4, and lysozyme were reduced in all the treated groups in comparison with the control group (p < 0.05). The results suggested a significant impact of electromagnetic on fish immunophysiological functions. Therefore, it is required to have serious attention in aquatic ecosystems.
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Affiliation(s)
| | - Mehdi Shamsaie Mehrjan
- Department of Fisheries Science, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Farzaneh Samiee
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mehdi Soltani
- Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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8
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Parate D, Franco-Obregón A, Fröhlich J, Beyer C, Abbas AA, Kamarul T, Hui JHP, Yang Z. Enhancement of mesenchymal stem cell chondrogenesis with short-term low intensity pulsed electromagnetic fields. Sci Rep 2017; 7:9421. [PMID: 28842627 PMCID: PMC5572790 DOI: 10.1038/s41598-017-09892-w] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/28/2017] [Indexed: 12/22/2022] Open
Abstract
Pulse electromagnetic fields (PEMFs) have been shown to recruit calcium-signaling cascades common to chondrogenesis. Here we document the effects of specified PEMF parameters over mesenchymal stem cells (MSC) chondrogenic differentiation. MSCs undergoing chondrogenesis are preferentially responsive to an electromagnetic efficacy window defined by field amplitude, duration and frequency of exposure. Contrary to conventional practice of administering prolonged and repetitive exposures to PEMFs, optimal chondrogenic outcome is achieved in response to brief (10 minutes), low intensity (2 mT) exposure to 6 ms bursts of magnetic pulses, at 15 Hz, administered only once at the onset of chondrogenic induction. By contrast, repeated exposures diminished chondrogenic outcome and could be attributed to calcium entry after the initial induction. Transient receptor potential (TRP) channels appear to mediate these aspects of PEMF stimulation, serving as a conduit for extracellular calcium. Preventing calcium entry during the repeated PEMF exposure with the co-administration of EGTA or TRP channel antagonists precluded the inhibition of differentiation. This study highlights the intricacies of calcium homeostasis during early chondrogenesis and the constraints that are placed on PEMF-based therapeutic strategies aimed at promoting MSC chondrogenesis. The demonstrated efficacy of our optimized PEMF regimens has clear clinical implications for future regenerative strategies for cartilage.
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Affiliation(s)
- Dinesh Parate
- Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 11, 1E Kent Ridge Road, Singapore, 119288, Singapore
| | - Alfredo Franco-Obregón
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 8, IE Kent Ridge Road, Singapore, 119228, Singapore. .,BioIonic Currents Electromagnetic Pulsing Systems Laboratory, BICEPS, National University of Singapore, MD6, 14 medical Drive, #14-01, Singapore, 117599, Singapore.
| | - Jürg Fröhlich
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 8, IE Kent Ridge Road, Singapore, 119228, Singapore.,Institute for Electromagnetic Fields, Swiss Federal Institute of Technology (ETH), Rämistrasse 101, 8092, Zurich, Switzerland
| | - Christian Beyer
- Institute for Electromagnetic Fields, Swiss Federal Institute of Technology (ETH), Rämistrasse 101, 8092, Zurich, Switzerland
| | - Azlina A Abbas
- Tissue Engineering Group (TEG), National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Department of Orthopaedic Surgery, Faculty of Medicine, University of Malaya, Pantai Valley, Kuala Lumpur, 50603, Malaysia
| | - Tunku Kamarul
- Tissue Engineering Group (TEG), National Orthopaedic Centre of Excellence for Research and Learning (NOCERAL), Department of Orthopaedic Surgery, Faculty of Medicine, University of Malaya, Pantai Valley, Kuala Lumpur, 50603, Malaysia
| | - James H P Hui
- Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 11, 1E Kent Ridge Road, Singapore, 119288, Singapore. .,Tissue Engineering Program, Life Sciences Institute, National University of Singapore, DSO (Kent Ridge) Building, #04-01, 27 Medical Drive, Singapore, 117510, Singapore.
| | - Zheng Yang
- Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, NUHS Tower Block, Level 11, 1E Kent Ridge Road, Singapore, 119288, Singapore. .,Tissue Engineering Program, Life Sciences Institute, National University of Singapore, DSO (Kent Ridge) Building, #04-01, 27 Medical Drive, Singapore, 117510, Singapore.
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9
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Salmen SH, Alharbi SA, Faden AA, Wainwright M. Evaluation of effect of high frequency electromagnetic field on growth and antibiotic sensitivity of bacteria. Saudi J Biol Sci 2017; 25:105-110. [PMID: 29379365 PMCID: PMC5775109 DOI: 10.1016/j.sjbs.2017.07.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 05/25/2017] [Accepted: 07/17/2017] [Indexed: 12/31/2022] Open
Abstract
This study was aimed to evaluate the impact of high frequency electromagnetic fields (HF-EMF at 900 and 1800 MHz) on DNA, growth rate and antibiotic susceptibility of S. aureus, S. epidermidis, and P. aeruginosa. In this study, bacteria were exposed to 900 and 1800 MHz for 2 h and then inoculated to new medium when their growth rate and antibiotic susceptibility were evaluated. Results for the study of bacterial DNA unsuccessful to appearance any difference exposed and non-exposed S. aureus and S. epidermidis. Exposure of S. epidermidis and S. aureus to electromagnetic fields mostly produced no statistically significant decrease in bacterial growth, except for S. aureus when exposure to 900 MHz at 12 h. Exposure of P. aeruginosa to electromagnetic fields at 900 MHz however, lead to a significant reduction in growth rate, while 1800 MHz had insignificant effect. With the exception of S. aureus, treated with amoxicillin (30 µg) and exposed to electromagnetic fields, radiation treatment had no significant effect on bacterial sensitivity to antibiotics.
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Affiliation(s)
- Saleh H Salmen
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Sulaiman A Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Asmaa A Faden
- Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - M Wainwright
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.,Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, UK
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10
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Electrolytic Stimulating Continuous Culture of Enterobacter dissolvens. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2017. [DOI: 10.22207/jpam.11.1.70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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11
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Qian J, Zhou C, Ma H, Li S, Yagoub AEA, Abdualrahman MAY. Biological Effect and Inactivation Mechanism of Bacillus subtilis Exposed to Pulsed Magnetic Field: Morphology, Membrane Permeability and Intracellular Contents. FOOD BIOPHYS 2016. [DOI: 10.1007/s11483-016-9442-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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David GF, Perez VH, Justo OR, Cubides DC, Cardona CA, Hristov J. Glycerol bioconversion in unconventional magnetically assisted bioreactor seeking whole cell biocatalyst (intracellular lipase) production. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2016.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Safari M, Jadidi M, Baghian A, Hasanzadeh H. Proliferation and differentiation of rat bone marrow stem cells by 400μT electromagnetic field. Neurosci Lett 2015; 612:1-6. [PMID: 26639423 DOI: 10.1016/j.neulet.2015.11.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 11/25/2015] [Accepted: 11/25/2015] [Indexed: 10/22/2022]
Abstract
The interaction between environment electromagnetic field (EMF) and cells can effect on various physiological processes. EMF as an external inducing factor, could effect on proliferation or differentiation of cells. The purpose of this study was to evaluate the influence of the electromagnetic field on the viability, proliferation and differentiation rate of bone marrow stem cells (BMSCs) to neuron. BMSCs were obtained from 42 adult male rats. The cells incubated and cultured in 96-wells and 6-wells plates and exposed to electromagnetic field (40 or 400μT) with a selected waveform: AC (alternative current), rectified half wave (RHW) and rectified full wave (RFW), for a week. To assess the viability and proliferation rate of treated cells, MTT assay was done, and then immunocytochemistry staining Neu N was used to evaluate cell differentiation to neuron. Results showed that EMF decreases the viability and proliferation in treated groups. But in AC group's reduction was significant. Minimum viability and proliferation rate was observed in RHW 400μT group compared with sham. Immunocytochemistry showed that EMF can induce BMSC differentiation into neuron in AC 400μT and RFW 400μT. Evidences of this research support the hypothesis that EMF can induce differentiation of BMSCs to neuron.
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Affiliation(s)
- Manouchehr Safari
- Research Center of Nervous System Stem Cells and Department of Anatomy, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Majid Jadidi
- Department of Medical Physics, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
| | - Atefeh Baghian
- Department of Medical Physics, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Hadi Hasanzadeh
- Department of Medical Physics, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
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14
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Kipriyanov A, Doktorov A, Purtov P. Magnetic field effects on bistability and bifurcation phenomena in lipid peroxidation. Bioelectromagnetics 2015; 36:485-93. [DOI: 10.1002/bem.21934] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 08/07/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Alexey Kipriyanov
- Voevodsky Institute of Chemical Kinetics and Combustion; Novosibirsk Russia
| | - Alexander Doktorov
- Voevodsky Institute of Chemical Kinetics and Combustion; Novosibirsk Russia
- Department of Physics; Novosibirsk State University; Novosibirsk Russia
| | - Peter Purtov
- Voevodsky Institute of Chemical Kinetics and Combustion; Novosibirsk Russia
- Department of Physics; Novosibirsk State University; Novosibirsk Russia
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15
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Baraúna RA, Santos AV, Graças DA, Santos DM, Ghilardi R, Pimenta AMC, Carepo MSP, Schneider MPC, Silva A. Exposure to an extremely low-frequency electromagnetic field only slightly modifies the proteome of Chromobacterium violaceumATCC 12472. Genet Mol Biol 2015; 38:227-30. [PMID: 26273227 PMCID: PMC4530650 DOI: 10.1590/s1415-4757382220140240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 11/30/2014] [Indexed: 11/21/2022] Open
Abstract
Several studies of the physiological responses of different organisms exposed to extremely low-frequency electromagnetic fields (ELF-EMF) have been described. In this work, we report the minimal effects of in situ exposure to ELF-EMF on the global protein expression of Chromobacterium violaceum using a gel-based proteomic approach. The protein expression profile was only slightly altered, with five differentially expressed proteins detected in the exposed cultures; two of these proteins (DNA-binding stress protein, Dps, and alcohol dehydrogenase) were identified by MS/MS. The enhanced expression of Dps possibly helped to prevent physical damage to DNA. Although small, the changes in protein expression observed here were probably beneficial in helping the bacteria to adapt to the stress generated by the electromagnetic field.
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Affiliation(s)
- Rafael A Baraúna
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Agenor V Santos
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Diego A Graças
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Daniel M Santos
- Laboratório de Venenos e Toxinas, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Rubens Ghilardi
- Superintendência do Meio Ambiente, Centrais Elétricas do Norte do Brasil S/A, Brasília, DF, Brazil
| | - Adriano M C Pimenta
- Laboratório de Venenos e Toxinas, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marta S P Carepo
- Rede de Química e Tecnologia, Centro de Química Fina e Biotecnologia, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Maria P C Schneider
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Artur Silva
- Laboratório de Polimorfismo de DNA, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
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Bakacak M, Bostancı MS, Attar R, Yıldırım ÖK, Yıldırım G, Bakacak Z, Sayar H, Han A. The effects of electromagnetic fields on the number of ovarian primordial follicles: An experimental study. Kaohsiung J Med Sci 2015; 31:287-92. [PMID: 26043407 DOI: 10.1016/j.kjms.2015.03.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 01/12/2015] [Accepted: 01/25/2015] [Indexed: 10/23/2022] Open
Abstract
The aim of this study was to evaluate the effect of an electromagnetic field (EMF), generated close to the ovaries, on primordial follicles. A total of 16 rats were used in this study. The study group consisted of rats exposed to an EMF in the abdominal region for 15 min/d for 15 days. Both the study and control group were composed of eight rats. After the treatment period of 15 days, the ovaries of the rats were extracted, and sections of ovarian tissue were taken for histological evaluation. The independent samples t test was used to compare the two groups. In the study group, the means of the right and left ovarian follicle numbers were 34.00 ± 10.20 and 36.00 ± 10.53, respectively. The average total ovarian follicle number was 70.00 ± 19.03. In the control group, the means of the right and left ovarian follicle numbers were 78.50 ± 25.98 and 71.75 ± 29.66, respectively, and the average total ovarian follicle number was 150.25 ± 49.53. The comparisons of the means of the right and left ovarian follicle numbers and the means of the total ovarian follicle numbers between the study and control groups indicated that the study group had significantly fewer follicles (p < 0.001, p = 0.011, and p = 0.002, respectively). This study found a significant decrease in the number of ovarian follicles in rats exposed to an EMF. Further clinical studies are needed to reveal the effects of EMFs on ovarian reserve and infertility.
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Affiliation(s)
- Murat Bakacak
- Department of Obstetrics and Gynecology, Kahramanmaras Sutcu Imam University, School of Medicine, Kahramanmaraş, Turkey.
| | - Mehmet Sühha Bostancı
- Department of Obstetrics and Gynecology, Sakarya University Research and Education Hospital, Sakarya, Turkey
| | - Rukset Attar
- Department of Obstetrics and Gynecology, Yeditepe University School of Medicine, İstanbul, Turkey
| | - Özge Kizilkale Yıldırım
- Department of Obstetrics and Gynecology, Yeditepe University School of Medicine, İstanbul, Turkey
| | - Gazi Yıldırım
- Department of Obstetrics and Gynecology, Yeditepe University School of Medicine, İstanbul, Turkey
| | - Zeyneb Bakacak
- Department of Obstetrics and Gynecology, Private Caka Vatan Hospital, Kahramanmaraş, Turkey
| | - Hamide Sayar
- Department of Pathology, Kahramanmaras Sutcu Imam University School of Medicine, Kahramanmaraş, Turkey
| | - Agahan Han
- Department of Obstetrics and Gynecology, Kanuni Sultan Suleyman Research and Education Hospital, İstanbul, Turkey
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17
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Baek S, Quan X, Kim S, Lengner C, Park JK, Kim J. Electromagnetic fields mediate efficient cell reprogramming into a pluripotent state. ACS NANO 2014; 8:10125-10138. [PMID: 25248035 DOI: 10.1021/nn502923s] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Life on Earth is constantly exposed to natural electromagnetic fields (EMFs), and it is generally accepted that EMFs may exert a variety of effects on biological systems. Particularly, extremely low-frequency electromagnetic fields (EL-EMFs) affect biological processes such as cell development and differentiation; however, the fundamental mechanisms by which EMFs influence these processes remain unclear. Here we show that EMF exposure induces epigenetic changes that promote efficient somatic cell reprogramming to pluripotency. These epigenetic changes resulted from EMF-induced activation of the histone lysine methyltransferase Mll2. Remarkably, an EMF-free system that eliminates Earth's naturally occurring magnetic field abrogates these epigenetic changes, resulting in a failure to undergo reprogramming. Therefore, our results reveal that EMF directly regulates dynamic epigenetic changes through Mll2, providing an efficient tool for epigenetic reprogramming including the acquisition of pluripotency.
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Affiliation(s)
- Soonbong Baek
- Lab of Stem Cells and Cell Reprogramming, Department of Biomedical Engineering, Dongguk University , Seoul 100-715, Korea
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18
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Laramee CB, Frisch P, McLeod K, Li GC. Elevation of heat shock gene expression from static magnetic field exposure in vitro. Bioelectromagnetics 2014; 35:406-13. [PMID: 24839179 DOI: 10.1002/bem.21857] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 03/20/2014] [Indexed: 02/02/2023]
Abstract
Previously, we found that extremely low frequency (ELF) electric fields were able to elicit an approximate 3.5-fold increase in heat shock gene expression, a response which may have applicability to cancer therapy. Based on recent studies demonstrating the ability of magnetic fields to influence gene expression, we hypothesized that low level static magnetic fields may be able to affect heat shock gene expression while avoiding some of the clinical difficulties that arise with electric fields. Transfected rat primary cells in monolayer were exposed to magnetic fields of 1 to 440 mT for 16, 24, or 48 h starting at 24 and 48 h post transfection. Heat shock protein (HSP70) expression, as indicated by a promoter linked luciferase reporter, was followed for up to 96 h and showed a dependence on flux density, exposure duration, and start time post transfection. A nonlinear response was observed for increasing flux density with a maximum of a 3.5-fold increase in expression for 48 h of exposure starting 48 h after transfection. These results demonstrate an enhancement of gene expression similar in magnitude to that observed with external electric field exposure, while eliminating many of the clinical complications.
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Affiliation(s)
- Craig B Laramee
- Biomedical Engineering Program, Department of Bioengineering, Binghamton University, Binghamton, New York
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19
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Makarov VI. Reduction of laser-induced retinal injury applying the combination of the 3D variable electric and magnetic fields in "vivo". Electromagn Biol Med 2013; 33:103-17. [PMID: 23781999 DOI: 10.3109/15368378.2013.784980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Oscillating Low Frequency Electro-Magnetic Fields action on eye retina restoration in Rattus Norvegicus was studied in the present work. A beneficial effect of 3-Dimention Oscillating Low Frequency Electro-Magnetic Field was found for the specific values of Electro-Magnetic Field parameters. We found that eye retina damaged by radiation of the fundamental frequency harmonic of a YAG laser has recovered earlier and rehabilitated to the original 3D-state in the presence of OLFEMF, with the parameters listed below in the text. The results obtained were explained by the action of oscillating sub-macro-motions in the cells upon the metabolic processes in these cells.
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Affiliation(s)
- Vladimir I Makarov
- Department of Physics, University of Puerto Rico , Rio Piedras, San Juan , Puerto Rico
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20
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Suszyński K, Marcol W, Szajkowski S, Pietrucha-Dutczak M, Cieślar G, Sieroń A, Lewin-Kowalik J. Variable spatial magnetic field influences peripheral nerves regeneration in rats. Electromagn Biol Med 2013; 33:198-205. [PMID: 23781984 DOI: 10.3109/15368378.2013.801351] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Generator of spatial magnetic field is one of most recent achievements among the magnetostimulators. This apparatus allows to obtain the rotating magnetic field. This new method may be more effective than other widely used techniques of magnetostimulation and magnetotherapy. We investigated the influence of alternating, spatial magnetic field on the regeneration of the crushed rat sciatic nerves. Functional and morphological evaluations were used. After crush injury of the right sciatic nerve, Wistar C rats (n = 80) were randomly divided into four groups (control and three experimental). The experimental groups (A, B, C) were exposed (20 min/day, 5 d/week, 4 weeks) to alternating spatial magnetic field of three different intensities. Sciatic Functional Index (SFI) and tensometric assessments were performed every week after nerve crush. Forty-eight hours before the sacrificing of animals, DiI (1,1'-di-octadecyl-3,3,3',3'-tetramethyloindocarbocyanine perchlorate) was applied 5 mm distally to the crush site. Collected nerves and dorsal root ganglia (DRG) were subjected to histological and immunohistochemical staining. The survival rate of DRG neurons was estimated. Regrowth and myelination of the nerves was examined. The results of SFI and tensometric assessment showed improvement in all experimental groups as compared to control, with best outcome observed in group C, exposed to the strongest magnetic field. In addition, DRG survival rate and nerve regeneration intensity were significantly higher in the C group. Above results indicate that strong spatial alternating magnetic field exerts positive effect on peripheral nerve regeneration and its application could be taken under consideration in the therapy of injured peripheral nerves.
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Affiliation(s)
- Krzysztof Suszyński
- Department of Physiology, Medical University of Silesia , Katowice , Poland and
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21
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Ramírez-Cadavid DA, Galindo-Muñoz AR, Zapata-Ocampo PA, Rojas-Vahos DF, Fernández-Ossa C, Atehortúa-Garcés L. Efecto de los campos eléctricos sobre la producción de biomasa micelial del hongo medicinal <i>Ganoderma lucidum</i> [(W. Curt.: Fr.) P. Karst. (Ganodermataceae)]. ACTUALIDADES BIOLÓGICAS 2012. [DOI: 10.17533/udea.acbi.331479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Se evaluó el efecto de los campos eléctricos sobre el crecimiento del hongo Ganoderma lucidum [(W. Curt.: Fr.) P. Karst. Ganodermataceae] bajo condiciones de cultivo sumergido, con el objetivo de optimizar su producción de biomasa. Ganoderma lucidum fue expuesto a tres factores diferentes [tipo de campo eléctrico corriente alterna (AC), corriente continua (DC) y corriente pulsada (IM)]; intensidad del campo [siete intensidades de campo desde 0,0 kV cm-1] (cultivo control) hasta 3,0 kV cm-1; y periodo de estimulación [dependiendo de la fase de crecimiento del hongo, después de la inoculación día 0 (fase lag), día 3 (fase exponencial o log) y día 6 (fase estacionaria)]. Los resultados mostraron que la combinación del campo eléctrico AC, con una intensidad de 1,5 kV cm-1 y aplicado al día 3 presentaron una mejor producción de biomasa con una media de 35,6450 ± 0,6684 g l-1, mientras que la combinación de los tres factores tipo de campo eléctrico DC a una intensidad de 2,5 kV cm-1 y aplicado el día 6 presentaron una menor producción de biomasa con una media de 26,2950 ± 3,9926 g l-1. Los anteriores resultados muestran que según la combinación de los factores evaluados es posible estimular la producción de biomasa del hongo Ganoderma lucidum bajo condiciones de cultivo sumergido mediante la aplicación de campo eléctrico.
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Poniedzialek B, Rzymski P, Nawrocka-Bogusz H, Jaroszyk F, Wiktorowicz K. The effect of electromagnetic field on reactive oxygen species production in human neutrophils in vitro. Electromagn Biol Med 2012; 32:333-41. [PMID: 23137127 DOI: 10.3109/15368378.2012.721845] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The present study was undertaken in order to determine the effect of low frequency electromagnetic field (EMF) on reactive oxygen species (ROS) production in human neutrophils in peripheral blood in vitro. We investigated how differently generated EMF and several levels of magnetic induction affect ROS production. To evaluate the level of ROS production, two fluorescent dyes were used: 2'7'-dichlorofluorscein-diacetate and dihydrorhodamine. Phorbol 12-myristate 13-acetate (PMA), known as strong stimulator of the respiratory burst, was also used. Alternating magnetic field was generated by means of Viofor JPS apparatus. Three different levels of magnetic induction have been analyzed (10, 40 and 60 μT). Fluorescence of dichlorofluorescein and 123 rhodamine was measured by flow cytometry. The experiments demonstrated that only EMF tuned to the calcium ion cyclotron resonance frequency was able to affect ROS production in neutrophils. Statistical analysis showed that this effect depended on magnetic induction value of applied EMF. Incubation in EMF inhibited cell activity slightly in unstimulated neutrophils, whereas the activity of PMA-stimulated neutrophils has increased after incubation in EMF.
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Affiliation(s)
- Barbara Poniedzialek
- Department of Biology and Environmental Protection, Poznan University of Medical Sciences, Poznań, Poland.
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23
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Assessment of genotoxic and cytotoxic hazards in brain and bone marrow cells of newborn rats exposed to extremely low-frequency magnetic field. J Biomed Biotechnol 2012; 2012:716023. [PMID: 23091355 PMCID: PMC3471024 DOI: 10.1155/2012/716023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 08/10/2012] [Indexed: 11/17/2022] Open
Abstract
The present study aimed to evaluate the association between whole body exposure to extremely low frequency magnetic field (ELF-MF) and genotoxic , cytotoxic hazards in brain and bone marrow cells of newborn rats. Newborn rats (10 days after delivery) were exposed continuously to 50 Hz, 0.5 mT for 30 days. The control group was treated as the exposed one with the sole difference that the rats were not exposed to magnetic field. Comet assay was used to quantify the level of DNA damage in isolated brain cells. Also bone marrow cells were flushed out to assess micronucleus induction and mitotic index. Spectrophotometric methods were used to measure the level of malondialdehyde (MDA) and the activity of glutathione (GSH) and superoxide dismutase (SOD). The results showed a significant increase in the mean tail moment indicating DNA damage in exposed group (P < 0.01, 0.001, 0.0001). Moreover ELF-MF exposure induced a significant (P < 0.01, 0.001) four folds increase in the induction of micronucleus and about three folds increase in mitotic index (P < 0.0001). Additionally newborn rats exposed to ELF-MF showed significant higher levels of MDA and SOD (P < 0.05). Meanwhile ELF-MF failed to alter the activity of GSH. In conclusion, the present study suggests an association between DNA damage and ELF-MF exposure in newborn rats.
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Corallo C, Rigato M, Battisti E, Albanese A, Gonnelli S, Giordano N. Therapeutic Application of Musically Modulated Electromagnetic Fields in the Treatment of Musculoskeletal Disorders. EUR J INFLAMM 2012. [DOI: 10.1177/1721727x1201000302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Different studies have demonstrated the efficacy of extremely low frequency electromagnetic fields (ELF EMFs) in the treatment of pain. In particular, the positive effects of ELF EMFs seems to depend on their respective codes, such as frequency, intensity and waveform, even if the exact mechanism of interaction is still debated. The most commonly used for extremely low frequency magnetotherapy is a 100Hz sinusoidal field (ELF) with a mean of induction of few Gauss. This article reviews the therapeutic application of a musically modulated electromagnetic field (TAMMEF), a new-generation of electromagnetic field used for extremely low frequency magnetotherapy characterized by variable frequencies, intensities and waveforms. Both clinical and experimental studies, performed by authors of the present review, have demonstrated the efficacy of ELF and the new TAMMEF systems in several musculoskeletal disorders such as osteoarthritis, rheumatoid arthritis, carpal tunnel syndrome, shoulder periarthritis and cervical spondylosis. Moreover, it has been demonstrated that ELF and TAMMEF systems are not only effective, but also safe, from clinical and experimental point of view. In fact, clinical trials did not reported any undesired side effect, while in vitro studies showed that ELF EMFs did not induce uncontrolled cell proliferation, did not affect cell viability and did not induce apoptosis. With their efficacy and safety, ELF and even more the new TAMMEF systems represent a valid complementary or alternative treatment to standard pharmacological therapies in reducing both pain and inflammation of patients affected by musculoskeletal disorders.
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Affiliation(s)
- C. Corallo
- Department of Internal Medicine, Endocrine-Metabolic Sciences and Biochemistry, University of Siena, Siena, Italy
- TAMMEF Centre, Department of Medical Physics, University of Siena, Siena, Italy
| | - M. Rigato
- TAMMEF Centre, Department of Medical Physics, University of Siena, Siena, Italy
| | - E. Battisti
- TAMMEF Centre, Department of Medical Physics, University of Siena, Siena, Italy
| | - A. Albanese
- TAMMEF Centre, Department of Medical Physics, University of Siena, Siena, Italy
| | - S. Gonnelli
- Department of Internal Medicine, Endocrine-Metabolic Sciences and Biochemistry, University of Siena, Siena, Italy
| | - N. Giordano
- Department of Internal Medicine, Endocrine-Metabolic Sciences and Biochemistry, University of Siena, Siena, Italy
- TAMMEF Centre, Department of Medical Physics, University of Siena, Siena, Italy
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Ravera S, Pepe IM, Calzia D, Morelli A, Panfoli I. Extremely low-frequency electromagnetic fields affect lipid-linked carbonic anhydrase. Electromagn Biol Med 2011; 30:67-73. [PMID: 21591890 DOI: 10.3109/15368378.2011.566770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In the last years, the effect of extremely low-frequency electromagnetic fields (ELF-EMF) on the activity of different enzymes were investigated. Only the membrane-anchored enzymes did decrease their activity, up to 50%. In this work, the effect of ELF-EMF on bovine lung membrane carbonic anhydrase (CA) were studied. Carbonic anhydrases are a family of 14 zinc-containing isozymes catalyzing the reversible reaction: CO(2)+H(2)O = HCO(3)(- )+H(+). CA differ in catalytic activity and subcellular localization. CA IV, IX, XII, XIV, and XV are membrane bound. In particular, CA IV, which is expressed in the lung, is glycosyl phosphatidyl inositol-linked to the membrane, therefore it was a candidate to inhibition by ELF-EMF. Exposure to the membranes to a field of 75 Hz frequency and different amplitudes caused CA activity to a reproducible decrease in enzymatic activity by 17% with a threshold of about 0.74 mT. The decrease in enzymatic activity was independent of the time of permanence in the field and was completely reversible. When the source of enzyme was solubilized with Triton, the field lost its effect on CA enzymatic activity, suggesting a crucial role of the membrane, as well as of the particular linkage of the enzyme to it, in determining the conditions for CA inactivation. Results are discussed in terms of the possible physiologic effects of CA inhibition in target organs.
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Affiliation(s)
- Silvia Ravera
- Department of Biology, University of Genoa, Genova, Italy.
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26
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Makarov VI, Khmelinskii I. FTIR and UV spectroscopy in real-time monitoring of S. cerevisiae cell culture. Electromagn Biol Med 2011; 30:181-97. [PMID: 22047457 DOI: 10.3109/15368378.2011.587927] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A combination of FTIR and UV spectroscopy is proposed as a novel technique for integrated real-time monitoring of metabolic activity and growth rates of cell cultures, required for systematic studies of cellular low-frequency (LF) electric and magnetic field (EMF) effects. As an example, we investigated simultaneous influence of periodic LF 3D EMFs on a culture of Saccharomyces cerevisiae (baker's yeast) cells. Amplitudes, frequencies and phases of the field components were the variable parameters. Electromagnetic fields were found to efficiently control the activity of the yeast cells, with the resulting CO(2) production rates, as monitored by FTIR spectroscopy, varying by at least one order of magnitude due to the field action. Additionally, population dynamics of the yeast cells was monitored by UV absorption of the yeast culture at λ(prob) = 320 nm, and compared to the CO(2) production rates. The detected physiologically active frequencies are all below 1 kHz, namely, 800 Hz excitation was effective in reducing the metabolic rates and arresting cell proliferation, whereas 200 Hz excitation was active in accelerating both cell proliferation and overall metabolic rates. The proposed methods produce objective, reliable and quantitative real-time results within minutes and may be used in various tasks that could benefit from a rapid feedback they provide in the form of metabolic and growth rates. Amplitude and frequency dependences of the LF EMF effects from individual field components with different polarizations were recorded and qualitatively interpreted based on a simple model, describing ion diffusion through a membrane channel.
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Affiliation(s)
- Vladimir I Makarov
- Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico
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Effect of Four Different Wave of 1.8mT 50Hz Electromagnetic Fields on Proliferation and Differentiation of Osteoblasts In vitro*. PROG BIOCHEM BIOPHYS 2011. [DOI: 10.3724/sp.j.1206.2011.00148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhou J, Ming LG, Ge BF, Wang JQ, Zhu RQ, Wei Z, Ma HP, Xian CJ, Chen KM. Effects of 50 Hz sinusoidal electromagnetic fields of different intensities on proliferation, differentiation and mineralization potentials of rat osteoblasts. Bone 2011; 49:753-61. [PMID: 21726678 DOI: 10.1016/j.bone.2011.06.026] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2011] [Revised: 06/17/2011] [Accepted: 06/18/2011] [Indexed: 11/25/2022]
Abstract
Electromagnetic fields (EMFs) have been used clinically to slow down osteoporosis and promote fracture healing for many years. However, the underlying action mechanisms and optimal parameters of the EMF applications are unclear. In this study, we investigated the effects of treatment for different durations with 50 Hz sinusoidal electromagnetic fields (SEMFs) at different intensities on proliferation, differentiation and mineralization potentials of rat osteoblasts. Osteoblasts isolated from neonatal rats were treated with SEMFs (50 Hz at 0.9 mT-4.8 mT, 0.3 mT interval, 30 min/day up to 15 days). Compared to untreated control, SEMFs inhibited osteoblast proliferation (after 3 days' treatment) but increased alkaline phosphatase (ALP) activity (after treatment for 9 days) from 0.9 mT to 1.8 mT, declined from 1.8 mT until 3.0 mT, and then increased again from 3.0 mT to 3.6 mT and decreased once again from 3.6 mT to 4.8 mT. Numbers of colonies stained positive for ALP after 8 days and mineralized nodules stained by Alizarin red after 10 days showed the same bimodal tendency as with the ALP activity, with two peaks at 1.8 mT and 3.6 mT. SEMFs also bimodally increased Runx-2, Col1α2 and Bmp-2 mRNA expression levels in osteoblasts at 12, 24 and 96 h after exposure. The results indicated that while exposure to 50 Hz SEMFs inhibits the osteoblast proliferation, it significantly promotes differentiation and mineralization potentials of osteoblasts in an intensity-dependent manner with peak activity at 1.8 mT and 3.6 mT.
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Affiliation(s)
- Jian Zhou
- Institute of Orthopaedics, Lanzhou General Hospital, [corrected] Lanzhou Command of CPLA, Lanzhou 730050, People's Republic of China.
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29
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Sert C, Söker S, Deniz M, Nergiz Y. Intracellular Ca2+levels in rat ventricle cells exposed to extremely low frequency magnetic field. Electromagn Biol Med 2011; 30:14-20. [DOI: 10.3109/15368378.2011.566773] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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30
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Santana-Blank L, Rodríguez-Santana E, Santana-Rodríguez K. Theoretic, experimental, clinical bases of the water oscillator hypothesis in near-infrared photobiomodulation. Photomed Laser Surg 2010; 28 Suppl 1:S41-52. [PMID: 20649429 DOI: 10.1089/pho.2009.2647] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The objective of this review is to propose and document a role for the water oscillator in near-infrared (NIR) photobiomodulation. Greater understanding of the role of the water oscillator may add to a more-coherent description of central effects of NIR light on redox centers and key transmembrane enzymes such as cytochrome c oxidase (CcO). In addition, water provides a complementary pathway for absorption and transportation of NIR energy in photobiomodulation. Because of its unexpected potential, we propose terming it the "water oscillator paradox." Photobiologic mechanisms involved in the treatment of complex diseases are discussed in light of the present state of the art.
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Affiliation(s)
- Luis Santana-Blank
- Fundalas, Foundation Interdisciplinary for Research and Development, Caracas, Venezuela.
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Berg H, GÜnther B, Hilger I, Radeva M, Traitcheva N, Wollweber L. Bioelectromagnetic Field Effects on Cancer Cells and Mice Tumors. Electromagn Biol Med 2010; 29:132-43. [DOI: 10.3109/15368371003776725] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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32
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Fojt L, Strašák L, Vetterl V. Extremely-low frequency magnetic field effects on sulfate reducing bacteria viability. Electromagn Biol Med 2010; 29:177-85. [PMID: 20923330 DOI: 10.3109/15368378.2010.513304] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
50 Hz magnetic fields effects on Sulfate Reducing Bacteria (SRB) viability were studied by colony forming units (CFU) counting. We found a 15% decrease of CFU number after magnetic field exposure (B=7.1 mT, f=50 Hz, t=24 min) compared to the control samples. These results are in good agreement with our previous work on other bacterial strains. The magnetic field effects on SRB are relatively large for small magnetic fields. The data correlations have been subjected to a simple physical chemical analysis, yielding surprisingly large estimates for the characteristic magnetic reaction susceptibility, even when the entire bacterium is assumed to be the direct target of interaction of the magnetic ac fields for the exposures in the time range from 3-24 min.
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Affiliation(s)
- Lukáš Fojt
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Královopolská 135, Brno, Czech Republic.
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33
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Ruiz-Gómez MJ, Ristori-Bogajo E, Prieto-Barcia MI, Martínez-Morillo M. No Evidence of Cellular Alterations by MilliTesla-Level Static and 50 Hz Magnetic Fields onS. cerevisiae. Electromagn Biol Med 2010; 29:154-64. [DOI: 10.3109/07435800.2010.505158] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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34
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Franzellitti S, Valbonesi P, Ciancaglini N, Biondi C, Contin A, Bersani F, Fabbri E. Transient DNA damage induced by high-frequency electromagnetic fields (GSM 1.8 GHz) in the human trophoblast HTR-8/SVneo cell line evaluated with the alkaline comet assay. Mutat Res 2010; 683:35-42. [PMID: 19822160 DOI: 10.1016/j.mrfmmm.2009.10.004] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 09/16/2009] [Accepted: 10/02/2009] [Indexed: 11/20/2022]
Abstract
One of the most controversial issue regarding high-frequency electromagnetic fields (HF-EMF) is their putative capacity to affect DNA integrity. This is of particular concern due to the increasing use of HF-EMF in communication technologies, including mobile phones. Although epidemiological studies report no detrimental effects on human health, the possible disturbance generated by HF-EMF on cell physiology remains controversial. In addition, the question remains as to whether cells are able to compensate their potential effects. We have previously reported that a 1-h exposure to amplitude-modulated 1.8 GHz sinusoidal waves (GSM-217 Hz, SAR=2 W/kg) largely used in mobile telephony did not cause increased levels of primary DNA damage in human trophoblast HTR-8/SVneo cells. Nevertheless, further investigations on trophoblast cell responses after exposure to GSM signals of different types and durations were considered of interest. In the present work, HTR-8/SVneo cells were exposed for 4, 16 or 24h to 1.8 GHz continuous wave (CW) and different GSM signals, namely GSM-217 Hz and GSM-Talk (intermittent exposure: 5 min field on, 10 min field off). The alkaline comet assay was used to evaluate primary DNA damages and/or strand breaks due to uncompleted repair processes in HF-EMF exposed samples. The amplitude-modulated signals GSM-217 Hz and GSM-Talk induced a significant increase in comet parameters in trophoblast cells after 16 and 24h of exposure, while the un-modulated CW was ineffective. However, alterations were rapidly recovered and the DNA integrity of HF-EMF exposed cells was similar to that of sham-exposed cells within 2h of recovery in the absence irradiation. Our data suggest that HF-EMF with a carrier frequency and modulation scheme typical of the GSM signal may affect the DNA integrity.
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Affiliation(s)
- Silvia Franzellitti
- Interdepartment Centre for Environmental Science Research, University of Bologna, Ravenna, Italy.
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35
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Sekine K, Takeda T, Nagaomo K, Matsushima E. Boundary-element calculations for amplification of effects of low-frequency electric fields in a doublet-shaped biological cell. Bioelectrochemistry 2010; 77:106-13. [DOI: 10.1016/j.bioelechem.2009.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Revised: 05/18/2009] [Accepted: 07/07/2009] [Indexed: 10/20/2022]
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36
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Lazutkin D, Husar P. Modeling of electromagnetic stimulation of the human brain. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2010; 2010:581-584. [PMID: 21095888 DOI: 10.1109/iembs.2010.5626402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The World Health Organization estimates depression as a serious threat to the health of millions of people worldwide. The purpose of this paper is to introduce the ongoing research devoted to the investigation of a possibility to use low-field electromagnetic stimulation of the human brain in the treatment of depressive disorder. In the course of the work the 3D models of transcranial magnetic stimulation and low-field magnetic stimulation based upon the use of a layered sphere head model have been developed. An initial approach towards the realistic human head reconstruction has been made. The revealed order of the stimulating electromagnetic field suitable for operation makes it possible to draft a technical specification for the stimulation device.
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Affiliation(s)
- Dmitry Lazutkin
- Division of Biological Signal Processing, Department of Biomedical Engineering and Medical Informatics, Ilmenau University of Technology, PO Box 100565, 98684, Germany.
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37
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Hristov J. Magnetic field assisted fluidization – a unified approach. Part 8. Mass transfer: magnetically assisted bioprocesses. REV CHEM ENG 2010. [DOI: 10.1515/revce.2010.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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38
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Effects of extremely low-frequency electromagnetic fields on Helicobacter pylori biofilm. Curr Microbiol 2009; 60:412-8. [PMID: 20033173 DOI: 10.1007/s00284-009-9558-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Accepted: 11/12/2009] [Indexed: 02/08/2023]
Abstract
The aim of this work was to investigate the effects of exposure to extremely low-frequency electromagnetic fields (ELF-EMF) both on biofilm formation and on mature biofilm of Helicobacter pylori. Bacterial cultures and 2-day-old biofilm of H. pylori ATCC 43629 were exposed to ELF-EMF (50 Hz frequency-1 mT intensity) for 2 days to assess their effect on the cell adhesion and on the mature biofilm detachment, respectively. All the exposed cultures and the respective sham exposed controls were studied for: the cell viability status, the cell morphological analysis, the biofilm mass measurement, the genotypic profile, and the luxS and amiA gene expression. The ELF-EMF acted on the bacterial population during the biofilm formation displaying significant differences in cell viability, as well as, in morphotypes measured by the prevalence of spiral forms (58.41%) in respect to the controls (33.14%), whereas, on mature biofilm, no significant differences were found when compared to the controls. The measurement of biofilm cell mass was significantly reduced in exposed cultures in both examined experimental conditions. No changes in DNA patterns were recorded, whereas a modulation in amiA gene expression was detected. An exposure to ELF-EMF of H. pylori biofilm induces phenotypic changes on adhering bacteria and decreases the cell adhesion unbalancing the bacterial population therefore reducing the H. pylori capability to protect itself.
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39
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50Hz magnetic field effect on the morphology of bacteria. Micron 2009; 40:918-22. [DOI: 10.1016/j.micron.2009.06.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 06/19/2009] [Accepted: 06/20/2009] [Indexed: 11/23/2022]
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40
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Alterations in adenylate kinase activity in human PBMCs after in vitro exposure to electromagnetic field: comparison between extremely low frequency electromagnetic field (ELF) and therapeutic application of a musically modulated electromagnetic field (TAMMEF). J Biomed Biotechnol 2009; 2009:717941. [PMID: 19763276 PMCID: PMC2744884 DOI: 10.1155/2009/717941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2009] [Revised: 05/20/2009] [Accepted: 07/07/2009] [Indexed: 11/17/2022] Open
Abstract
This study investigated the effects of electromagnetic fields on enzymes involved in purine
metabolism in human peripheral blood mononuclear cells in vitro. Cells were obtained from 20
volunteers. We tested both low-energy, extremely low frequency (ELF; 100-Hz) electromagnetic
fields and the Therapeutic Application of Musically Modulated Electromagnetic Fields
(TAMMEFs); the latter is characterized by variable frequencies, intensities, and wave shapes.
Adenylate kinase activity was increased after ELF field exposure but decreased slightly after
TAMMEF exposure. Neither of the two electromagnetic field affected the activities of the purine
metabolism enzymes ecto-5′-nucleotidase, adenosine deaminase, and adenosine kinase. We concluded that ELF fields may influence cellular electrical charge stability; stimulation of adenylate kinase activity could restore the cell to a state of equilibrium. In contrast, TAMMEF fields may be useful for maintaining and regulating the cellular electrical charge.
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41
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Strasák L, Bártová E, Krejci J, Fojt L, Vetterl V. Effects of ELF-EMF on brain proteins in mice. Electromagn Biol Med 2009; 28:96-104. [PMID: 19337900 DOI: 10.1080/15368370802711870] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Effect of electromagnetic low frequency fields was studied on mice. We analyzed level of protein in brain of mouse. The levels of c-Jun and c-Fos in brains were measured using Western-blot techniques. Female and male laboratory mice were exposed for 4 days to magnetic field (Bm = 2 mT, f = 50 Hz). The exposure took place in cylindrical coil at laboratory temperature. After the experiment they were sacrificed and the level of protein c-Jun and c-Fos in different parts of brain were estimated. The expression of c-Fos was not affected by magnetic field on the other hand the expression of c-Jun decreased after magnetic field exposure. The results did not depend on sex of mice.
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Affiliation(s)
- Ludĕk Strasák
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic.
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42
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Long Y, Cai GP, Guan ZC, Liu H, Liang XD. Effects of Electromagnetic Fields on the Bioactivities of an Osteoblast-Like Cell Line (UMR-106). ACTA ACUST UNITED AC 2009. [DOI: 10.3109/15368370009167840] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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43
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Ruiz-Gómez MJ, Martínez-Morillo M. Electromagnetic Fields and the Induction of DNA Strand Breaks. Electromagn Biol Med 2009; 28:201-14. [DOI: 10.1080/15368370802608696] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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44
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Berg H. Bioelectric and Biomagnetic Methods for Cancer Research and Therapy—A Survey. Electromagn Biol Med 2009. [DOI: 10.1080/15368370500382180] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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45
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Baciu C, Salus HP, Berg H. ELECTROMAGNETIC PERMEABILIZATION OF YEAST CELL MEMBRANES YIELDING ENHANCED PHOTODYNAMIC ACTION: A SYNERGISM. ACTA ACUST UNITED AC 2009. [DOI: 10.1081/jbc-100108576] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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46
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Berg A, Berg H. Influence of ELF Sinusoidal Electromagnetic Fields on Proliferation and Metabolite Yield of Fungi. Electromagn Biol Med 2009; 25:71-7. [PMID: 16595336 DOI: 10.1080/15368370600581947] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The response of mycelium proliferation in 12 strains of fungi were tested by sinusoidal ELF 50 Hz electromagnetic field treatment in the range B = 0.6-10 mT over 10 days. The ratio of experiment/control indicated three types of proliferation changes: a) no significant change, b) a strong decrease down to E/C = 0.2, c) a maximization of mycelium diameter by treatment at 5-7 mT. According to these results, effects can be produced noninvasively by varying either magnetic intensities or time of treatment. As yet, systematic bioelectromagnetic research using sinusoidal electromagnetic fields (SEMF)-on fermentation of fungi is still in its initial stages.
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Affiliation(s)
- Albrecht Berg
- Laboratory Bioelectrochemistry, Beutenberg Campus, Jena, Germany.
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47
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Zhou A, Liu M, Wang X, Yu H, Zhu M, Pang L, Wang L, Berg H. Effects of ELF Inductively Coupled Weak Magnetic Fields on Proliferation of 6B1 Cells. ACTA ACUST UNITED AC 2009. [DOI: 10.3109/15368379909022589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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48
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Huang L, Dong L, Chen Y, Qi H, Xiao D. Effects of Sinusoidal Magnetic Field Observed on Cell Proliferation, Ion Concentration, and Osmolarity in Two Human Cancer Cell Lines. Electromagn Biol Med 2009; 25:113-26. [PMID: 16771300 DOI: 10.1080/15368370600719067] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Low frequency magnetic fields have previously been shown to affect cell functions. In this article, the effects of 20 mT, 50 Hz sinusoidal magnetic field on cell proliferation, ion concentration, and osmolarity in two human cancer cell lines (HL-60 and SK-Hep-1) were investigated. Inhibition of cell growth was observed. On the other hand, the exposure also increased the Na+, K+ ion concentration and osmolarity in cell supernatant compared to the control group. To our knowledge, this is the first study on cancer cells where magnetic fields affect osmolarity in cell supernatant. In addition, a model of cells exposed to the oscillating magnetic field is described as well as the characteristics of ions in and out of cells. The experimental data appears to be consistent with the theoretical analysis. The results are also discussed in terms of the relationships among cell growth, ion concentration, and osmolarity. Magnetic field inhibitions of cell growth in vitro may relate to changes in cell ion concentration and osmolarity.
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Affiliation(s)
- Lingzhen Huang
- Department of Electrical Engineering, Shanghai Jiaotong University, Shanghai, China
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49
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Strašák L, Vetterl V, Fojt L. Effects of 50 Hz Magnetic Fields on the Viability of Different Bacterial Strains. Electromagn Biol Med 2009. [DOI: 10.1080/15368370500379715] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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50
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Dini L, Dwikat M, Panzarini E, Vergallo C, Tenuzzo B. Morphofunctional study of 12-O-tetradecanoyl-13-phorbol acetate (TPA)-induced differentiation of U937 cells under exposure to a 6 mT static magnetic field. Bioelectromagnetics 2009; 30:352-64. [PMID: 19189300 DOI: 10.1002/bem.20474] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Luciana Dini
- Department of Biological and Environmental Science and Technology (Disteba), University of Salento, Via per Monteroni, Lecce, Italy.
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