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Dong L, Xia P, Tian L, Tian C, Zhao W, Zhao L, Duan J, Zhao Y, Zheng Y. A Review of Aspects of Synaptic Plasticity in Hippocampus via mT Extremely Low-Frequency Magnetic Fields. Bioelectromagnetics 2023; 44:63-70. [PMID: 36786476 DOI: 10.1002/bem.22437] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/20/2022] [Accepted: 01/28/2023] [Indexed: 02/15/2023]
Abstract
The subthreshold magnetic modulation technique stimulates cells with mT extremely low-frequency magnetic fields (ELF-MFs), which are insufficient to induce neuronal action potentials. Although they cannot directly induce resting neurons to discharge, mT magnetic stimulation can regulate the excitability of the nervous system, which regulates learning and memory by some unknown mechanisms. Herein, we describe the regulation of mT ELF-MFs with different parameters on synaptic plasticity in hippocampal neurons. Additionally, we summarize the latest research on the possible mechanism of the effect of ELF-MFs on synaptic plasticity. Some studies have shown that ELF-MFs are able to inhibit long-term potentiation (LTP) by increasing concentration of intracellular Ca2+ concentration ([Ca2+ ]i ), as well as concentration of reactive oxygen species. The research in this paper has significance for the comprehensive understanding of relevant neurological mechanisms of learning and memory by mT ELF-MFs stimulation. However, more high-quality research is necessary to determine the regulatory mechanism of mT ELF-MFs on synaptic plasticity in order to optimize this technique as a treatment for neurological diseases. © 2023 Bioelectromagnetics Society.
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Affiliation(s)
- Lei Dong
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Pei Xia
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Lei Tian
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Chunxiao Tian
- School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Wenjun Zhao
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Ling Zhao
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Jiakang Duan
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Yuhan Zhao
- School of Life Sciences, Tiangong University, Tianjin, China
| | - Yu Zheng
- School of Life Sciences, Tiangong University, Tianjin, China
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2
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Abkhezr H, Mohaddes G, Nikniaz Z, Abbasalizad Farhangi M, Heydari H, Nikniaz L. The effect of Extremely Low Frequency Electromagnetic Field on spatial memory of mice and rats: A systematic review. LEARNING AND MOTIVATION 2023. [DOI: 10.1016/j.lmot.2023.101873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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3
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Zadeh-Haghighi H, Simon C. Magnetic field effects in biology from the perspective of the radical pair mechanism. J R Soc Interface 2022; 19:20220325. [PMID: 35919980 PMCID: PMC9346374 DOI: 10.1098/rsif.2022.0325] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 07/14/2022] [Indexed: 04/07/2023] Open
Abstract
Hundreds of studies have found that weak magnetic fields can significantly influence various biological systems. However, the underlying mechanisms behind these phenomena remain elusive. Remarkably, the magnetic energies implicated in these effects are much smaller than thermal energies. Here, we review these observations, and we suggest an explanation based on the radical pair mechanism, which involves the quantum dynamics of the electron and nuclear spins of transient radical molecules. While the radical pair mechanism has been studied in detail in the context of avian magnetoreception, the studies reviewed here show that magnetosensitivity is widespread throughout biology. We review magnetic field effects on various physiological functions, discussing static, hypomagnetic and oscillating magnetic fields, as well as isotope effects. We then review the radical pair mechanism as a potential unifying model for the described magnetic field effects, and we discuss plausible candidate molecules for the radical pairs. We review recent studies proposing that the radical pair mechanism provides explanations for isotope effects in xenon anaesthesia and lithium treatment of hyperactivity, magnetic field effects on the circadian clock, and hypomagnetic field effects on neurogenesis and microtubule assembly. We conclude by discussing future lines of investigation in this exciting new area of quantum biology.
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Affiliation(s)
- Hadi Zadeh-Haghighi
- Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, Canada T2N 1N4
- Institute for Quantum Science and Technology, University of Calgary, Calgary, Alberta, Canada T2N 1N4
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Christoph Simon
- Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, Canada T2N 1N4
- Institute for Quantum Science and Technology, University of Calgary, Calgary, Alberta, Canada T2N 1N4
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada T2N 1N4
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4
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Lai H. Neurological effects of static and extremely-low frequency electromagnetic fields. Electromagn Biol Med 2022; 41:201-221. [DOI: 10.1080/15368378.2022.2064489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Henry Lai
- Department of Bioengineering, University of Washington, Seattle, WA, USA
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5
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Moretti J, Rodger J. A little goes a long way: Neurobiological effects of low intensity rTMS and implications for mechanisms of rTMS. CURRENT RESEARCH IN NEUROBIOLOGY 2022; 3:100033. [PMID: 36685761 PMCID: PMC9846462 DOI: 10.1016/j.crneur.2022.100033] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 01/26/2022] [Accepted: 02/15/2022] [Indexed: 01/25/2023] Open
Abstract
Repetitive transcranial magnetic stimulation (rTMS) is a widespread technique in neuroscience and medicine, however its mechanisms are not well known. In this review, we consider intensity as a key therapeutic parameter of rTMS, and review the studies that have examined the biological effects of rTMS using magnetic fields that are orders of magnitude lower that those currently used in the clinic. We discuss how extensive characterisation of "low intensity" rTMS has set the stage for translation of new rTMS parameters from a mechanistic evidence base, with potential for innovative and effective therapeutic applications. Low-intensity rTMS demonstrates neurobiological effects across healthy and disease models, which include depression, injury and regeneration, abnormal circuit organisation, tinnitus etc. Various short and long-term changes to metabolism, neurotransmitter release, functional connectivity, genetic changes, cell survival and behaviour have been investigated and we summarise these key changes and the possible mechanisms behind them. Mechanisms at genetic, molecular, cellular and system levels have been identified with evidence that low-intensity rTMS and potentially rTMS in general acts through several key pathways to induce changes in the brain with modulation of internal calcium signalling identified as a major mechanism. We discuss the role that preclinical models can play to inform current clinical research as well as uncover new pathways for investigation.
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Affiliation(s)
- Jessica Moretti
- School of Biological Sciences, The University of Western Australia, Perth, WA, Australia,Perron Institute for Neurological and Translational Science, Perth, WA, Australia
| | - Jennifer Rodger
- School of Biological Sciences, The University of Western Australia, Perth, WA, Australia,Perron Institute for Neurological and Translational Science, Perth, WA, Australia,Corresponding author. School of Biological Sciences M317, The University of Western Australia, 35 Stirling Highway, Crawley WA, 6009, Australia.
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6
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Motolese F, Capone F, Di Lazzaro V. New tools for shaping plasticity to enhance recovery after stroke. HANDBOOK OF CLINICAL NEUROLOGY 2022; 184:299-315. [PMID: 35034743 DOI: 10.1016/b978-0-12-819410-2.00016-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Stroke is the second most common cause of death worldwide and its prevalence is projected to increase in the coming years in parallel with the increase of life expectancy. Despite the great improvements in the management of the acute phase of stroke, some residual disability persists in most patients thus requiring rehabilitation. One third of patients do not reach the maximal recovery potential and different approaches have been explored with the aim to boost up recovery. In this regard, noninvasive brain stimulation techniques have been widely used to induce neuroplasticity phenomena. Different protocols of repetitive transcranial magnetic stimulation (rTMS) and transcranial electrical stimulation (tES) can induce short- and long-term changes of synaptic excitability and are promising tools for enhancing recovery in stroke patients. New options for neuromodulation are currently under investigation. They include: vagal nerve stimulation (VNS) that can be delivered invasively, with implanted stimulators and noninvasively with transcutaneous VNS (tVNS); and extremely low-frequency (1-300Hz) magnetic fields. This chapter will provide an overview on the new techniques that are used for neuroprotection and for enhancing recovery after stroke.
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Affiliation(s)
- Francesco Motolese
- Neurology, Neurophysiology and Neurobiology Unit, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Fioravante Capone
- Neurology, Neurophysiology and Neurobiology Unit, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Vincenzo Di Lazzaro
- Neurology, Neurophysiology and Neurobiology Unit, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy.
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7
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Dong L, Li G, Gao Y, Lin L, Zheng Y, Cao XB. Exploring the form- And time-dependent effect of low-frequency electromagnetic fields on maintenance of hippocampal long-term potentiation. Eur J Neurosci 2020; 52:3166-3180. [PMID: 32065697 DOI: 10.1111/ejn.14705] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 12/15/2022]
Abstract
Low-frequency electromagnetic field (LF-EMF) stimulation is an emerging neuromodulation tool that is attracting more attention because of its non-invasive and well-controlled characteristics. However, the effect of different LF-EMF features including the forms and the time of addition on neuronal activity has not been completely understood. In this study, we used multi-electrode array (MEA) systems to develop a flexible in vitro magnetic stimulation device with plug-and-play features that allows for real-time delivery of LF-EMFs to biological tissues. Crucially, the method enables different forms of LF-EMF to be added at any time to a long-term potentiation (LTP) experiment without interrupting the process of LTP induction. We demonstrated that the slope of field excitatory postsynaptic potentials (fEPSPs) decreased significantly under post or priming uninterrupted sine LF-EMFs. The fEPSPs slope would continue to decline significantly when LF-EMFs were added two times with a 20-min interval. Paired-pulse ratio (PPR) was analyzed and the results reflected that LF-EMFs induced LTP was expressed postsynaptically. The results of pharmacological experiments indicated that AMPA receptor activity was involved in the process of LTP loss caused by post-LF-EMFs. Moreover, the effect of priming sine or Quadripulse stimulation (QPS)-patterned LF-EMFs depended on the time interval between the end of LF-EMF and the beginning of baseline recording. Interestingly, the effect of sine LF-EMFs on LTP would not disappear within 120 min, while the impact of QPS-patterned LF-EMFs on LTP might disappear after 90 min. These results indicated that LF-EMF might have a form- and time-dependent effect on LTP.
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Affiliation(s)
- Lei Dong
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin, China.,Tianjin Key Laboratory of Biomedical Detecting Techniques & Instruments, Tianjin University, Tianjin, China
| | - Gang Li
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin, China.,Tianjin Key Laboratory of Biomedical Detecting Techniques & Instruments, Tianjin University, Tianjin, China
| | - Yang Gao
- School of Information Technology and Electrical Engineering, The University of Queensland, St Lucia, Brisbane, Queensland, Australia
| | - Ling Lin
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin, China.,Tianjin Key Laboratory of Biomedical Detecting Techniques & Instruments, Tianjin University, Tianjin, China
| | - Yu Zheng
- School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin, China
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8
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Capone F, Pellegrino G, Motolese F, Rossi M, Musumeci G, Di Lazzaro V. Extremely Low Frequency Magnetic Fields Do Not Affect LTP-Like Plasticity in Healthy Humans. Front Hum Neurosci 2020; 14:14. [PMID: 32116603 PMCID: PMC7014826 DOI: 10.3389/fnhum.2020.00014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/14/2020] [Indexed: 11/17/2022] Open
Abstract
Introduction Several studies explored the biological effects of extremely low-frequency magnetic fields (ELF-MFs) in vitro, reporting the induction of functional changes in neuronal activity. In particular, ELF-MFs can influence synaptic plasticity both in vitro and in animal models but some studies reported an increase in long-term potentiation (LTP) whereas others suggested its reduction. However, no specific study has investigated such effect on humans. Aims To evaluate whether ELF-MFs affect the propensity of the human cortex to undergo LTP-like plasticity. Methods We designed a randomized, single-blind, sham-controlled, cross-over study on 10 healthy subjects. Cortical plasticity was induced by intermittent theta burst stimulation (iTBS) before and after 45-min ELF-MFs (75 Hz; 1.8 mT) or sham exposure and was estimated by measuring the changes of motor evoked potentials (MEP) amplitude before and after each iTBS. Results No adverse events were reported. No significant effects of ELF-MFs on cortical plasticity were found. Conclusion Whole-brain exposure to ELF-MFs (75 Hz; 1.8 mT) is safe and does not seem to significantly affect LTP-like plasticity in human motor cortex.
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Affiliation(s)
- Fioravante Capone
- Unit of Neurology, Neurophysiology, and Neurobiology, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy.,NeXT: Neurophysiology and Neuroengineering of Human-Technology Interaction Research Unit, Campus Bio-Medico University, Rome, Italy
| | - Giovanni Pellegrino
- Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, McGill University, Montreal, QC, Canada
| | - Francesco Motolese
- Unit of Neurology, Neurophysiology, and Neurobiology, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy.,NeXT: Neurophysiology and Neuroengineering of Human-Technology Interaction Research Unit, Campus Bio-Medico University, Rome, Italy
| | - Mariagrazia Rossi
- Unit of Neurology, Neurophysiology, and Neurobiology, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy.,NeXT: Neurophysiology and Neuroengineering of Human-Technology Interaction Research Unit, Campus Bio-Medico University, Rome, Italy
| | - Gabriella Musumeci
- Unit of Neurology, Neurophysiology, and Neurobiology, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy.,NeXT: Neurophysiology and Neuroengineering of Human-Technology Interaction Research Unit, Campus Bio-Medico University, Rome, Italy
| | - Vincenzo Di Lazzaro
- Unit of Neurology, Neurophysiology, and Neurobiology, Department of Medicine, Università Campus Bio-Medico di Roma, Rome, Italy
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9
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Zheng Y, Cheng J, Dong L, Ma X, Kong Q. Effects of exposure to extremely low frequency electromagnetic fields on hippocampal long-term potentiation in hippocampal CA1 region. Biochem Biophys Res Commun 2019; 517:513-519. [PMID: 31376941 DOI: 10.1016/j.bbrc.2019.07.085] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 07/22/2019] [Indexed: 11/17/2022]
Abstract
Exposure to environmental electromagnetic fields, especially to the extremely low-frequency (ELF < 300 Hz) electromagnetic fields (EMFs) might produce modulation effects on neuronal activity. Long-term changes in synaptic plasticity such as long-term potentiation (LTP) involved in learning and memory may have contributions to a number of neurological diseases. However, the modulation effects of ELF-EMFs on LTP are not yet fully understood. In our present study, we aimed to evaluate the effects of exposure to ELF-EMFs on LTP in hippocampal CA1 region in rats. Hippocampal slices were exposed to magnetic fields generated by sXcELF system with different frequencies (15, 50, and 100 Hz [Hz]), intensities (0.5, 1, and 2 mT [mT]), and duration (10 s [s], 20 s, 40 s, 60 s, and 5 min), then the baseline signal recordings for 20 min and the evoked field excitatory postsynaptic potentials (fEPSPs) were recorded. We found that the LTP amplitudes decreased after magnetic field exposure, and the LTP amplitudes decreased in proportion to exposure doses and durations, suggesting ELF-EMFs may have dose and duration-dependent inhibition effects. Among multiple exposure duration and doses combinations, upon 5 min magnetic field exposure, 15 Hz/2 mT maximally inhibited LTP. Under 15 Hz/2 mT ELF-EMFs, LTP amplitude decreases in proportion to the length of exposure durations within 5 min time frame. Our findings illustrated the potential effects of ELF-EMFs on synaptic plasticity and will lead to better understanding of the influence on learning and memory.
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Affiliation(s)
- Yu Zheng
- School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin, 300387, China.
| | - Jianhao Cheng
- School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Lei Dong
- State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin, 300072, China
| | - Xiaoxu Ma
- School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Qingyao Kong
- Department of Anesthesia and Critical Care, University of Chicago, Chicago, IL, USA
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10
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Rekena A, Didrihsone E, Vegere K. The role of magnetic field in the biopharmaceutical production: Current perspectives. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2019; 22:e00334. [PMID: 31011551 PMCID: PMC6460295 DOI: 10.1016/j.btre.2019.e00334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/19/2019] [Accepted: 03/28/2019] [Indexed: 01/02/2023]
Abstract
Current scientific evidence on the influence of magnetic field on mammalian cell lines used for industrial production of biopharmaceuticals, on human cell lines and on potential cell lines for the biopharmaceutical production is presented in this review. A novel magnetic coupling induced agitation could be the best solution to eliminate sources of contamination in stirred tank bioreactors which is especially important for mammalian cell cultures. Nevertheless, the side effect of magnetically-coupled stirring mechanism is that cells are exposed to the generated magnetic field. The influence of magnetic field on biological systems has been investigated for several decades. The research continues nowadays as well, investigating the influence of various types of magnetic field in a variety of experimental setups. In the context of bioreactors, only the lower frequencies and intensities of the magnetic field are relevant.
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Affiliation(s)
- Alina Rekena
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga, LV1007, Latvia
| | - Elina Didrihsone
- Bioengineering Laboratory, Latvian State Institute of Wood Chemistry, Dzerbenes 27, Riga, LV1006, Latvia
- Institute of Polymer Materials, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena 3, Riga, LV-1048, Latvia
| | - Kristine Vegere
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Pulka 3, Riga, LV1007, Latvia
- Water Research Laboratory, Faculty of Civil Engineering, Riga Technical University, Paula Valdena 1-205, Riga, LV1048, Latvia
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11
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Téglás T, Dörnyei G, Bretz K, Nyakas C. Whole-body pulsed EMF stimulation improves cognitive and psychomotor activity in senescent rats. Behav Brain Res 2018; 349:163-168. [DOI: 10.1016/j.bbr.2018.04.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 04/03/2018] [Accepted: 04/23/2018] [Indexed: 01/01/2023]
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12
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Dong L, Zheng Y, Li ZY, Li G, Lin L. Modulating effects of on-line low frequency electromagnetic fields on hippocampal long-term potentiation in young male Sprague-Dawley rat. J Neurosci Res 2018; 96:1775-1785. [DOI: 10.1002/jnr.24276] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Lei Dong
- State Key Laboratory of Precision Measurement Technology and Instruments; Tianjin University; Tianjin 300072 China
- Tianjin Key Laboratory of Biomedical Detecting Techniques & Instruments; Tianjin University; Tianjin 300072 China
| | - Yu Zheng
- School of Electronics and Information Engineering; Tianjin Polytechnic University; Tianjin 300387 China
| | - Ze-Yan Li
- Viterbi School of Engineering; University of Southern California; Los Angeles 90007
| | - Gang Li
- State Key Laboratory of Precision Measurement Technology and Instruments; Tianjin University; Tianjin 300072 China
- Tianjin Key Laboratory of Biomedical Detecting Techniques & Instruments; Tianjin University; Tianjin 300072 China
| | - Ling Lin
- State Key Laboratory of Precision Measurement Technology and Instruments; Tianjin University; Tianjin 300072 China
- Tianjin Key Laboratory of Biomedical Detecting Techniques & Instruments; Tianjin University; Tianjin 300072 China
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13
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Ahmadi S, Alavi SS, Jadidi M, Ardjmand A. Exposure to GSM 900-MHz mobile radiation impaired inhibitory avoidance memory consolidation in rat: Involvements of opioidergic and nitrergic systems. Brain Res 2018; 1701:36-45. [PMID: 30030983 DOI: 10.1016/j.brainres.2018.07.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 07/11/2018] [Accepted: 07/12/2018] [Indexed: 12/23/2022]
Abstract
The use of mobile phones is increasing, and the main health concern is the possible deleterious effects of radiation on brain functioning. The present study aimed to examine the effects of exposure to a global system for mobile communication (GSM) with mobile phones on inhibitory avoidance (IA) memory performance as well as the involvement of endogenous opioids and nitric oxide (NO) in this task. Male Wistar rats, 10-12 weeks old, were used. The results showed that four weeks of mobile phone exposure impaired IA memory performance in rats. The results also revealed that post-training, but not pre-training, as well as pre-test intracerebroventricular (i.c.v.) injections of naloxone (0.4, 4 and 40 ng/rat), dose-dependently recovered the impairment of IA memory performance induced by GSM radiation. Additionally, the impairment of IA memory performance was completely recovered in the exposed animals with post-training treatment of naloxone (40 ng/rat) plus pre-test i.c.v. injections of L-arginine (100 and 200 nmol/rat). However, pre-test i.c.v. injections of L-NAME (10 and 20 nmol/rat), impaired IA memory performance in the animals receiving post-training naloxone (40 ng/rat). In the animals receiving post-training naloxone treatment, the impairment of IA memory performance due to pre-test i.c.v. injections of L-NAME was recovered by the pre-test co-administration of L-arginine. It was concluded that the recovery from impairment of IA memory in GSM-exposed animals with post-training naloxone treatment was the result of blockade of the opioidergic system in early memory consolidation as well as activation of the nitrergic system in the retrieval phase of memory.
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Affiliation(s)
- Shamseddin Ahmadi
- Department of Biological Science, Faculty of Science, University of Kurdistan, Sanandaj, Iran
| | - Samaneh Sadat Alavi
- Physiology Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Majid Jadidi
- Department of Medical Physics, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Abolfazl Ardjmand
- Physiology Research Center, Kashan University of Medical Sciences, Kashan, Iran; Department of Physiology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.
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14
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Hong I, Garrett A, Maker G, Mullaney I, Rodger J, Etherington SJ. Repetitive low intensity magnetic field stimulation in a neuronal cell line: a metabolomics study. PeerJ 2018; 6:e4501. [PMID: 29576970 PMCID: PMC5853602 DOI: 10.7717/peerj.4501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 02/21/2018] [Indexed: 12/12/2022] Open
Abstract
Low intensity repetitive magnetic stimulation of neural tissue modulates neuronal excitability and has promising therapeutic potential in the treatment of neurological disorders. However, the underpinning cellular and biochemical mechanisms remain poorly understood. This study investigates the behavioural effects of low intensity repetitive magnetic stimulation (LI-rMS) at a cellular and biochemical level. We delivered LI-rMS (10 mT) at 1 Hz and 10 Hz to B50 rat neuroblastoma cells in vitro for 10 minutes and measured levels of selected metabolites immediately after stimulation. LI-rMS at both frequencies depleted selected tricarboxylic acid (TCA) cycle metabolites without affecting the main energy supplies. Furthermore, LI-rMS effects were frequency-specific with 1 Hz stimulation having stronger effects than 10 Hz. The observed depletion of metabolites suggested that higher spontaneous activity may have led to an increase in GABA release. Although the absence of organised neural circuits and other cellular contributors (e.g., excitatory neurons and glia) in the B50 cell line limits the degree to which our results can be extrapolated to the human brain, the changes we describe provide novel insights into how LI-rMS modulates neural tissue.
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Affiliation(s)
- Ivan Hong
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Andrew Garrett
- School of Biological Sciences, Experimental and Regenerative Neuroscience, The University of Western Australia, Crawley, WA, Australia
| | - Garth Maker
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Ian Mullaney
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Jennifer Rodger
- School of Biological Sciences, Experimental and Regenerative Neuroscience, The University of Western Australia, Crawley, WA, Australia.,Brain Plasticity laboratory, Perron Institute for Neurological and Translational Science, Perth, WA, Australia
| | - Sarah J Etherington
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
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15
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Sakhaie MH, Soleimani M, Pourheydar B, Majd Z, Atefimanesh P, Asl SS, Mehdizadeh M. Effects of Extremely Low-Frequency Electromagnetic Fields on Neurogenesis and Cognitive Behavior in an Experimental Model of Hippocampal Injury. Behav Neurol 2017; 2017:9194261. [PMID: 29259353 PMCID: PMC5702423 DOI: 10.1155/2017/9194261] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 07/23/2017] [Accepted: 08/08/2017] [Indexed: 01/19/2023] Open
Abstract
Exposure to extremely low-frequency electromagnetic fields may induce constant modulation in neuronal plasticity. In recent years, tremendous efforts have been made to design a suitable strategy for enhancing adult neurogenesis, which seems to be deterred due to brain senescence and several neurodegenerative diseases. In this study, we evaluated the effects of ELF-EMF on neurogenesis and memory, following treatment with trimethyltin chloride (TMT) as a neurotoxicant. The mice in all groups (n = 56) were injected with BrdU during the experiment for seven consecutive days to label newborn cells. Spatial memory was assessed by the Morris water maze (MWM) test. By the end of the experiment, neurogenesis and neuronal differentiation were assessed in the hippocampus, using immunohistochemistry and Western blot analysis. Based on the findings, exposure to ELF-EMF enhanced spatial learning and memory in the MWM test. ELF-EMF exposure significantly enhanced the number of BrdU+ and NeuN+ cells in the dentate gyrus of adult mice (P < 0.001 and P < 0.05, resp.). Western blot analysis revealed significant upregulation of NeuroD2 in ELF-EMF-exposed mice compared to the TMT-treated group (P < 0.05). These findings suggest that ELF-EMF might have clinical implications for the improvement of neurodegenerative processes and could help develop a novel therapeutic approach in regenerative medicine.
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Affiliation(s)
- Mohammad Hassan Sakhaie
- Cellular and Molecular Research Center and Department of Anatomy, Iran University of Medical Sciences, Tehran, Iran
- Department of Anatomy, Arak University of Medical Sciences, Arak, Iran
| | - Mansoureh Soleimani
- Cellular and Molecular Research Center and Department of Anatomy, Iran University of Medical Sciences, Tehran, Iran
| | - Bagher Pourheydar
- Urmia University of Medical Sciences, Faculty of Medicine, Neurophysiology Research Center, Department of Anatomy, Urmia, Iran
| | - Zahra Majd
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Pezhman Atefimanesh
- Cellular and Molecular Research Center, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Sara Soleimani Asl
- Endometrium and Endometriosis Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
- Anatomy Department, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mehdi Mehdizadeh
- Cellular and Molecular Research Center, Faculty of Advanced Technologies in Medicine, Department of Anatomy, Iran University of Medical Sciences, Tehran, Iran
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Abouelela A, Wieraszko A. The Influence of Glutamate on Axonal Compound Action Potential In Vitro. J Brachial Plex Peripher Nerve Inj 2017; 11:e29-e37. [PMID: 28077958 DOI: 10.1055/s-0036-1593441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 08/14/2016] [Indexed: 10/20/2022] Open
Abstract
Background Our previous experiments demonstrated modulation of the amplitude of the axonal compound action potential (CAP) by electrical stimulation. To verify assumption that glutamate released from axons could be involved in this phenomenon, the modification of the axonal CAP induced by glutamate was investigated. Objectives The major objective of this research is to verify the hypothesis that axonal activity would trigger the release of glutamate, which in turn would interact with specific axonal receptors modifying the amplitude of the action potential. Methods Segments of the sciatic nerve were exposed to exogenous glutamate in vitro, and CAP was recorded before and after glutamate application. In some experiments, the release of radioactive glutamate analog from the sciatic nerve exposed to exogenous glutamate was also evaluated. Results The glutamate-induced increase in CAP was blocked by different glutamate receptor antagonists. The effect of glutamate was not observed in Ca-free medium, and was blocked by antagonists of calcium channels. Exogenous glutamate, applied to the segments of sciatic nerve, induced the release of radioactive glutamate analog, demonstrating glutamate-induced glutamate release. Immunohistochemical examination revealed that axolemma contains components necessary for glutamatergic neurotransmission. Conclusion The proteins of the axonal membrane can under the influence of electrical stimulation or exogenous glutamate change membrane permeability and ionic conductance, leading to a change in the amplitude of CAP. We suggest that increased axonal activity leads to the release of glutamate that results in changes in the amplitude of CAPs.
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Affiliation(s)
- Ahmed Abouelela
- Department of Biology, The College of Staten Island, City University of New York, New York, NY, USA; Program in Neuroscience, The College of Staten Island, City University of New York, New York, NY, USA
| | - Andrzej Wieraszko
- Department of Biology, The College of Staten Island, City University of New York, New York, NY, USA; Program in Neuroscience, The College of Staten Island, City University of New York, New York, NY, USA; Graduate Center, City University of New York, New York, USA
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Shang Y, Wang X, Shang X, Zhang H, Liu Z, Yin T, Zhang T. Repetitive transcranial magnetic stimulation effectively facilitates spatial cognition and synaptic plasticity associated with increasing the levels of BDNF and synaptic proteins in Wistar rats. Neurobiol Learn Mem 2016; 134 Pt B:369-78. [PMID: 27555233 DOI: 10.1016/j.nlm.2016.08.016] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 07/07/2016] [Accepted: 08/19/2016] [Indexed: 12/27/2022]
Abstract
Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive technique, by which cognitive deficits can be alleviated. Furthermore, rTMS may facilitate learning and memory. However, its underlying mechanism is still little known. The aim of this study was to investigate if the facilitation of spatial cognition and synaptic plasticity, induced by rTMS, is regulated by enhancing pre- and postsynaptic proteins in normal rats. Morris water maze (MWM) test was performed to examine the spatial cognition. The synaptic plasticity, including long-term potentiation (LTP) and depotentiation (DEP), presynaptic plasticity paired-pulse facilitation (PPF), from the hippocampal Schaffer collaterals to CA1 region was subsequently measured using in vivo electrophysiological techniques. The expressions of brain-derived neurotrophic factor (BDNF), presynaptic protein synaptophysin (SYP) and postsynaptic protein NR2B were measured by Western blot. Our data show that the spatial learning/memory and reversal learning/memory in rTMS rats were remarkably enhanced compared to that in the Sham group. Furthermore, LTP and DEP as well as PPF were effectively facilitated by 5Hz-rTMS. Additionally, the expressions of BDNF, SYP and NR2B were significantly increased via magnetic stimulation. The results suggest that rTMS considerably increases the expressions of BDNF, postsynaptic protein NR2B and presynaptic protein SYP, and thereby significantly enhances the synaptic plasticity and spatial cognition in normal animals.
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Affiliation(s)
- Yingchun Shang
- College of Life Sciences and State Key Laboratory of Medicinal Chemical Biology & Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071 Tianjin, PR China
| | - Xin Wang
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, PR China
| | - Xueliang Shang
- College of Life Sciences and State Key Laboratory of Medicinal Chemical Biology & Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071 Tianjin, PR China
| | - Hui Zhang
- College of Life Sciences and State Key Laboratory of Medicinal Chemical Biology & Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071 Tianjin, PR China
| | - Zhipeng Liu
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, PR China
| | - Tao Yin
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, PR China.
| | - Tao Zhang
- College of Life Sciences and State Key Laboratory of Medicinal Chemical Biology & Key Laboratory of Bioactive Materials Ministry of Education, Nankai University, 300071 Tianjin, PR China.
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Early exposure to intermediate-frequency magnetic fields alters brain biomarkers without histopathological changes in adult mice. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:4406-21. [PMID: 25913185 PMCID: PMC4410255 DOI: 10.3390/ijerph120404406] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 04/08/2015] [Accepted: 04/15/2015] [Indexed: 11/25/2022]
Abstract
Recently we have reported that intermediate-frequency magnetic field (IF-MF) exposure transiently altered the mRNA expression levels of memory function-related genes in the hippocampi of adult male mice. However, the effects of IF-MF exposure during brain development on neurological biomarkers have not yet been clarified. In the present study, we investigated the effect of IF-MF exposure during development on neurological and immunological markers in the mouse hippocampus in 3- and 7-week-old male mice. Pregnant C57BL/6J mice were exposed to IF-MF (21 kHz, 3.8 mT) for one hour per day from organogenesis period day 7 to 17. At adolescence, some IF-MF-exposed mice were further divided into exposure, recovery, and sham-exposure groups. The adolescent-exposure groups were exposed again to IF-MF from postnatal day 27 to 48. The expression of mRNA in the hippocampi was examined using a real-time RT-PCR method, and microglia activation was examined by immunohistochemical analysis. The expression levels of NR1 and NR2B as well as transcription factors (CaMKIV, CREB1), inflammatory mediators (COX2, IL-1 β,TNF-α), and the oxidative stress marker heme-oxygenase (HO)-1 were significantly increased in the IF-MF-exposed mice, compared with the control group, in the 7-week-old mice, but not in the 3-week-old mice. Microglia activation was not different between the control and other groups. This study provides the first evidence that early exposure to IF-MF reversibly affects the NMDA receptor, its related signaling pathways, and inflammatory mediators in the hippocampus of young adult mice; these changes are transient and recover after termination of exposure without histopathological changes.
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Ahmed Z, Wieraszko A. Pulsed magnetic stimulation modifies amplitude of action potentials in vitro via ionic channels-dependent mechanism. Bioelectromagnetics 2015; 36:386-97. [DOI: 10.1002/bem.21917] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 03/11/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Zaghloul Ahmed
- Department of Physical Therapy; The Program for Developmental Neuroscience; The College of Staten Island, Staten Island, and Graduate Center/The City University of New York; New York NY
| | - Andrzej Wieraszko
- The Department of Biology; The Program for Developmental Neuroscience; The College of Staten Island, Staten Island, and Graduate Center/The City University of New York; New York NY
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Abstract
Cardiac muscular contraction of the neurogenic heart that could be excited by pulsed magnetic stimulation (PMS) was investigated using preparation of the isolated crayfish heart. When a figure-eight magnetic coil was set over the isolated heart, cardiac contraction induced by a single PMS was not observed. Cardiac arrest occurred immediately after repetitive PMS and persisted for dozens of seconds depending on the number of stimuli. We concluded that PMS caused neuronal modulation in the neuronal network in the cardiac ganglion.
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Affiliation(s)
- Atsushi Chiba
- a Department of Physiology , Kinki University , Osaka-Sayama, Japan
| | - Masahiko Inase
- a Department of Physiology , Kinki University , Osaka-Sayama, Japan
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21
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LI Y, ZHANG C, SONG T. Disturbance of the Magnetic Field Did Not Affect Spatial Memory. Physiol Res 2014; 63:377-85. [DOI: 10.33549/physiolres.932594] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Extremely low-frequency magnetic field (ELF-MF) has been suggested to influence the cognitive capability but this should be dynamically evaluated in a longitudinal study. Previous training can affect performance, but the influence under magnetic field is unclear. This study aims to evaluate the effects of previous training and ELF-MF exposure on learning and memory using the Morris water maze (MWM). Sprague-Dawley rats were subjected to MWM training, ELF-MF exposure (50 Hz, 100 µT), or ELF-MF exposure combined with MWM training for 90 days. Normal rats were used as controls. The MWM was used to test. The data show that the rats exposed to training and ELF-MF with training performed better on spatial acquisition when re-tested. However, during the probe trial the rats showed no change between the training phase and the test phase. Compared with the control group, the ELF-MF group showed no significant differences. These results confirm that previous training can improve the learning and memory capabilities regarding spatial acquisition in the MWM and this effect can last for at least 90 days. However, this improvement in learning and memory capabilities was not observed during the probe trial. Furthermore, ELF-MF exposure did not interfere with the improvement in learning and memory capabilities.
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Affiliation(s)
| | | | - T. SONG
- Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China
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22
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Expression of neurogranin in hippocampus of rat offspring exposed to restraint stress and pulsed magnetic fields. Brain Res 2014; 1570:26-34. [DOI: 10.1016/j.brainres.2014.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 04/28/2014] [Accepted: 05/02/2014] [Indexed: 11/23/2022]
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Effects of exposure to an extremely low frequency electromagnetic field on hippocampal long-term potentiation in rat. Brain Res 2014; 1564:1-8. [DOI: 10.1016/j.brainres.2014.03.041] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 03/25/2014] [Accepted: 03/28/2014] [Indexed: 11/20/2022]
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Salunke BP, Umathe SN, Chavan JG. Experimental evidence for involvement of nitric oxide in low frequency magnetic field induced obsessive compulsive disorder-like behavior. Pharmacol Biochem Behav 2014; 122:273-8. [PMID: 24780504 DOI: 10.1016/j.pbb.2014.04.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 03/27/2014] [Accepted: 04/18/2014] [Indexed: 01/12/2023]
Abstract
It is well documented that extremely low frequency magnetic field (ELF MF) produced effects on the function of nervous system in humans and laboratory animals. Dopaminergic and serotonergic pathways have been implicated in obsessive compulsive disorder (OCD). Recently involvement of nitric oxide (NO) in OCD-like behavior is suggested. Hence, the present study was carried out to understand the involvement of dopamine, serotonin and NO in ELF MF induced OCD-like behavior. Swiss albino mice were exposed to ELF MF (50 Hz, 10G) for 8 h/day for 7, 30, 60, 90 and 120 days by subjecting them to Helmholtz coils. OCD-like behavior was assessed in terms of marble burying behavior (MBB) test. Results revealed that ELF MF induced time dependant MBB, on 7th, 30th, 60th, 90th, and 120th exposure day. Further, levels of dopamine, serotonin and NO after 120 days of ELF MF exposure were determined in the regions of the brain. The neurohumoral studies revealed that exposure to ELF MF increased NO levels in cortex, hippocampus and hypothalamus, and levels of dopamine and serotonin remain unaffected. As OCD-like behavior after ELF MF exposure was associated with higher levels of NO with no significant change in serotonin and dopamine. The effect of such exposure was studied in groups concurrently treated with NO modulators, NO precursor, L-ARG (400 mg/kg) or NOS inhibitor, L-NAME (15.0mg/kg) or 7-NI (10.0 mg/kg). These treatments revealed that NO precursor exacerbated and NOS inhibitors attenuated ELF MF induced OCD-like behavior with corresponding changes in the levels of NO.
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Affiliation(s)
- Balwant P Salunke
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Mahatma Jyotiba Fuley Shaikshanik Parisar, Amravati Road, Nagpur, MS,440 033, India.
| | - Sudhir N Umathe
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Mahatma Jyotiba Fuley Shaikshanik Parisar, Amravati Road, Nagpur, MS,440 033, India
| | - Jagatpalsingh G Chavan
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Mahatma Jyotiba Fuley Shaikshanik Parisar, Amravati Road, Nagpur, MS,440 033, India
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Razavi S, Salimi M, Shahbazi-Gahrouei D, Karbasi S, Kermani S. Extremely low-frequency electromagnetic field influences the survival and proliferation effect of human adipose derived stem cells. Adv Biomed Res 2014; 3:25. [PMID: 24592372 PMCID: PMC3928843 DOI: 10.4103/2277-9175.124668] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 05/05/2013] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Extremely low-frequency electromagnetic fields (ELF-EMF) can effect on biological systems and alters some cell functions like proliferation rate. Therefore, we aimed to attempt the evaluation effect of ELF-EMF on the growth of human adipose derived stem cells (hADSCs). MATERIALS AND METHODS ELF-EMF was generated by a system including autotransformer, multi-meter, solenoid coils, teslameter and its probe. We assessed the effect of ELF-EMF with intensity of 0.5 and 1 mT and power line frequency 50 Hz on the survival of hADSCs for 20 and 40 min/day for 7 days by MTT assay. One-way analysis of variance was used to assessment the significant differences in groups. RESULTS ELF-EMF has maximum effect with intensity of 1 mT for 20 min/day on proliferation of hADSCs. The survival and proliferation effect (PE) in all exposure groups were significantly higher than that in sham groups (P < 0.05) except in group of 1 mT and 40 min/day. CONCLUSION Our results show that between 0.5 m and 1 mT ELF-EMF could be enhances survival and PE of hADSCs conserving the duration of exposure.
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Affiliation(s)
- Shahnaz Razavi
- Department of Anatomical Sciences, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Marzieh Salimi
- Department of Medical Physics and Medical Engineering, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Daryoush Shahbazi-Gahrouei
- Department of Medical Physics and Medical Engineering, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Saeed Karbasi
- Department of Medical Physics and Medical Engineering, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Saeed Kermani
- Department of Medical Physics and Medical Engineering, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Salunke BP, Umathe SN, Chavan JG. Involvement of NMDA receptor in low-frequency magnetic field-induced anxiety in mice. Electromagn Biol Med 2013; 33:312-26. [DOI: 10.3109/15368378.2013.839453] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Azanza MJ, del Moral A, Calvo AC, Pérez-Bruzón RN, Junquera C. Synchronization dynamics induced on pairs of neurons under applied weak alternating magnetic fields. Comp Biochem Physiol A Mol Integr Physiol 2013; 166:603-18. [PMID: 24012769 DOI: 10.1016/j.cbpa.2013.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 08/09/2013] [Accepted: 08/26/2013] [Indexed: 11/29/2022]
Abstract
Pairs of Helix aspersa neurons show an alternating magnetic field dependent frequency synchronization (AMFS) when exposed to a weak (amplitude B0 between 0.2 and 150 Gauss (G)) alternating magnetic field (AMF) of extremely low frequency (ELF, fM = 50 Hz). We have compared the AMFS patterns of discharge with: i) the synaptic activity promoted by glutamate and acetylcholine; ii) the activity induced by caffeine; iii) the bioelectric activity induced on neurons interconnected by electric synapses. AMFS activity reveals several specific features: i) a tight coincidence in time of the pattern and frequency, f, of discharge; ii) it is induced in the time interval of field application; iii) it is dependent on the intensity of the sinusoidal applied magnetic field; iv) elicited biphasic responses (excitation followed by inhibition) run in parallel for the pair of neurons; and v) some neuron pairs either spontaneously or AMF synchronized can be desynchronized under applied higher AMF. Our electron microscopy studies reveal gap-like junctions confirming our immunocytochemistry results about expression of connexin 26 (Cx26) in 4.7% of Helix neurons. AMF and carbenoxolone did not induce any significant effect on spontaneous synchronization through electric synapses.
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Affiliation(s)
- María J Azanza
- Laboratorio de Magnetobiología, Departamento de Anatomía e Histología, Facultad de Medicina, Universidad de Zaragoza, 50009 Zaragoza, Spain.
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Balassa T, Varró P, Elek S, Drozdovszky O, Szemerszky R, Világi I, Bárdos G. Changes in synaptic efficacy in rat brain slices following extremely low‐frequency magnetic field exposure at embryonic and early postnatal age. Int J Dev Neurosci 2013; 31:724-30. [DOI: 10.1016/j.ijdevneu.2013.08.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/26/2013] [Accepted: 08/26/2013] [Indexed: 11/16/2022] Open
Affiliation(s)
- Tímea Balassa
- Department of Physiology and NeurobiologyInstitute of BiologyFaculty of ScienceEötvös Loránd UniversityBudapestHungary
| | - Petra Varró
- Department of Physiology and NeurobiologyInstitute of BiologyFaculty of ScienceEötvös Loránd UniversityBudapestHungary
| | - Szilvia Elek
- Department of Physiology and NeurobiologyInstitute of BiologyFaculty of ScienceEötvös Loránd UniversityBudapestHungary
| | - Orsolya Drozdovszky
- Department of Physiology and NeurobiologyInstitute of BiologyFaculty of ScienceEötvös Loránd UniversityBudapestHungary
| | - Renáta Szemerszky
- Department of Physiology and NeurobiologyInstitute of BiologyFaculty of ScienceEötvös Loránd UniversityBudapestHungary
- Institute for Health Promotion and Sport SciencesEötvös Loránd University, Faculty of Education and PsychologyBudapestHungary
| | - Ildikó Világi
- Department of Physiology and NeurobiologyInstitute of BiologyFaculty of ScienceEötvös Loránd UniversityBudapestHungary
| | - György Bárdos
- Department of Physiology and NeurobiologyInstitute of BiologyFaculty of ScienceEötvös Loránd UniversityBudapestHungary
- Institute for Health Promotion and Sport SciencesEötvös Loránd University, Faculty of Education and PsychologyBudapestHungary
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Cui Y, Ge Z, Rizak JD, Zhai C, Zhou Z, Gong S, Che Y. Deficits in water maze performance and oxidative stress in the hippocampus and striatum induced by extremely low frequency magnetic field exposure. PLoS One 2012; 7:e32196. [PMID: 22570685 PMCID: PMC3343077 DOI: 10.1371/journal.pone.0032196] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2011] [Accepted: 01/24/2012] [Indexed: 11/20/2022] Open
Abstract
The exposures to extremely low frequency magnetic field (ELF-MF) in our environment have dramatically increased. Epidemiological studies suggest that there is a possible association between ELF-MF exposure and increased risks of cardiovascular disease, cancers and neurodegenerative disorders. Animal studies show that ELF-MF exposure may interfere with the activity of brain cells, generate behavioral and cognitive disturbances, and produce deficits in attention, perception and spatial learning. Although, many research efforts have been focused on the interaction between ELF-MF exposure and the central nervous system, the mechanism of interaction is still unknown. In this study, we examined the effects of ELF-MF exposure on learning in mice using two water maze tasks and on some parameters indicative of oxidative stress in the hippocampus and striatum. We found that ELF-MF exposure (1 mT, 50 Hz) induced serious oxidative stress in the hippocampus and striatum and impaired hippocampal-dependent spatial learning and striatum-dependent habit learning. This study provides evidence for the association between the impairment of learning and the oxidative stress in hippocampus and striatum induced by ELF-MF exposure.
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Affiliation(s)
- Yonghua Cui
- Medical College of Soochow University, Suzhou, People’s Republic of China
| | - Zhiqiang Ge
- Medical College of Soochow University, Suzhou, People’s Republic of China
| | - Joshua Dominic Rizak
- Laboratory of Primate Neuroscience Research, Key Laboratory of Animal Models, Kunming Institute of Zoology, Chinese Academy of Science, Kunming, People’s Republic of China
| | - Chao Zhai
- Medical College of Soochow University, Suzhou, People’s Republic of China
| | - Zhu Zhou
- Medical College of Soochow University, Suzhou, People’s Republic of China
| | - Songjie Gong
- Medical College of Soochow University, Suzhou, People’s Republic of China
| | - Yi Che
- Medical College of Soochow University, Suzhou, People’s Republic of China
- * E-mail:
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Ahmed Z, Wieraszko A. The influence of pulsed magnetic fields (PMFs) on nonsynaptic potentials recorded from the central and peripheral nervous systems in vitro. Bioelectromagnetics 2010; 30:621-30. [PMID: 19551768 DOI: 10.1002/bem.20516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The influence of pulsed magnetic fields (PMFs) on nonsynaptic potentials recorded from the central and peripheral nervous system in vitro has been investigated. The population spikes (PSs) recorded from hippocampal slices during antidromic stimulation and compound action potentials (CAPs) recorded from the segments of the sciatic nerve were used as indicators of neuronal activity. The potentials recorded from both preparations were significantly and permanently enhanced following PMF (0.16 Hz, 15 mT) exposure. The increase in the antidromic PS occurred even in the presence of potassium channel blocker tetraethylammonium (TEA) and was accompanied by multiple spiking. Among all frequencies of PMF tested (0.5, 0.16, 0.07, 0.03, 0.0 Hz), the frequency of 0.5 Hz was the most effective in enhancement of potential amplitude. The influence of PMF on the amplitude of two CAPs evoked by the pair of electrical stimuli applied in rapid succession has also been evaluated. In control conditions the potential triggered by the second stimuli was slightly smaller expressing the phenomenon of short-term depression (STD). Although PMF exposure amplified the amplitude of both potentials, the increase in the size of the first potential was significantly greater increasing further the magnitude of STD. The blocking of potassium channels reversed STD into facilitation. One of the possible mechanisms involved in PMF action could be the modification of the axonal threshold, which was significantly reduced following exposure to PMF.
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Affiliation(s)
- Zaghloul Ahmed
- Department of Physical Therapy, The College of Staten Island/CUNY, Victory Boulevard, Staten Island, New York 10314, USA
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Tokay T, Holl N, Kirschstein T, Zschorlich V, Köhling R. High-frequency magnetic stimulation induces long-term potentiation in rat hippocampal slices. Neurosci Lett 2009; 461:150-4. [DOI: 10.1016/j.neulet.2009.06.032] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Revised: 06/09/2009] [Accepted: 06/11/2009] [Indexed: 11/25/2022]
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Axonal release of glutamate analog, d-2,3-3H-Aspartic acid and l-14C-proline from segments of sciatic nerve following electrical and magnetic stimulation. Neurosci Lett 2009; 458:19-22. [DOI: 10.1016/j.neulet.2009.04.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2009] [Revised: 03/31/2009] [Accepted: 04/10/2009] [Indexed: 11/21/2022]
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Mach QH, Persinger MA. Behavioral changes with brief exposures to weak magnetic fields patterned to stimulate long-term potentiation. Brain Res 2009; 1261:45-53. [PMID: 19210956 DOI: 10.1016/j.brainres.2009.01.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2008] [Revised: 01/01/2009] [Accepted: 01/05/2009] [Indexed: 10/21/2022]
Abstract
Brief whole body exposures of rats to weak (1 microT) complex magnetic fields whose patterns induce long term potential (LTP) when applied as electric current to hippocampal slices produced powerful behavioral changes. Rats exposed for 30 min before but not 30 min after hourly training sessions for spatial memory displayed impairments comparable to those elicited by complete electrode-induced saturation of hippocampal activity. Exposure to the same LTP-patterned magnetic fields after weaning during the induction of limbic seizures produced diminished learning of conditioned contextual fear during adulthood. However exposure to magnetic fields designed to simulate a "virtual" hippocampal state during acquisition of a timed inhibitory task (DRL) facilitated performance. These results show that physiologically-patterned magnetic fields can produce dramatic changes in behavior when they are applied during states associated with marked synaptic plasticity.
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Affiliation(s)
- Quoc Hao Mach
- Behavioural Neuroscience Program, Laurentian University, Sudbury, Ontario, Canada
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Lagace N, St-Pierre LS, Persinger M. Attenuation of epilepsy-induced brain damage in the temporal cortices of rats by exposure to LTP-patterned magnetic fields. Neurosci Lett 2009; 450:147-51. [DOI: 10.1016/j.neulet.2008.11.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Revised: 10/31/2008] [Accepted: 11/04/2008] [Indexed: 10/21/2022]
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