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Xiaoqian Cheng, Kenan Rajjoub, Alexey Shashurin, Dayun Yan, Jonathan H Sherman, Ka Bian, Ferid Murad, Michael Keidar
It has been reported since late 1970 that magnetic field interacts strongly with biological systems. Cold atmospheric plasma (CAP) has also been widely studied over the past few decades in physics, biology, and medicine. In this study, we propose a novel idea to combine static magnetic field (SMF) with CAP as a tool for cancer therapy. Breast cancer cells and wild type fibroblasts were cultured in 96-well plates and treated by CAP with or without SMF. Breast cancer cells MDA-MB-231 showed a significant decrease in viability after direct plasma treatment with SMF (compared to only plasma treatment)...
October 17, 2016: Bioelectromagnetics
Dongmei Ye, Chen Chen, Liang Wang, Mei Shen
A patient with spontaneous pneumothorax of 40% was treated by short-wave diathermy without chest drainage. A 5-day course of therapy achieved a satisfactory outcome, with the mean rate of air absorption being about 8% per day. We reviewed previous studies and found that short-wave and ultrashort-wave therapy could be feasible treatment options for minimal pneumothorax and residual pneumothorax after aspiration. Our study provides a case for further clinical application of short-wave therapy. We recommend further large-scale, randomized controlled studies to evaluate the effects of this mode of treatment...
October 8, 2016: Bioelectromagnetics
Alireza Lajevardipour, Andrew W Wood, Robert L McIntosh, Steve Iskra
As the availability of Terahertz (THz) sources and their application expands, interaction with biological material needs to be well-understood. In order to accurately estimate the energy absorption pattern in skin and other tissues in the THz and far Infrared regions, values of dielectric parameters ϵ and σ are required. We present an approach for tissue water, which uses literature values of complex refractive index for pure water together with some considerations regarding the effects of dissolved salts...
October 7, 2016: Bioelectromagnetics
Jun Zhou, Yuan Liao, Haitao Xie, Ying Liao, Yahua Zeng, Neng Li, Guanghua Sun, Qi Wu, Guijuan Zhou
Ibandronate (IBN) and pulsed electromagnetic field (PEMF) have each shown positive effects for treating osteoporosis, but no study has evaluated the relative effects of these treatments combined. This study investigated the effects of IBN + PEMF on bone turnover, mineral density, microarchitecture, and biomechanical properties in an ovariectomized (OVX) rat model of osteoporosis. Fifty 3-month-old rats were randomly apportioned to receive a sham-operation (n = 10), or ovariectomy (n = 40). The latter group was equally divided as the model (OVX control) or to receive IBN, PEMF, or IBN + PEMF...
October 6, 2016: Bioelectromagnetics
Thomas Lemaire, Joe Wiart, Philippe De Doncker
The spatial structure of the vertical component of the electric field emitted by base stations in the Brussels region (Belgium) is measured, and studied using the variogram. A relationship between the variogram shape and base station antenna density in each measurement area is found; the variogram range and sill level are shown to depend on cellular base stations' antenna density, following exponential laws. Bioelectromagnetics. © 2016 Wiley Periodicals, Inc.
October 5, 2016: Bioelectromagnetics
Beadaa Mohammed, Konstanty Bialkowski, Amin Abbosh, Paul C Mills, Andrew P Bradley
Dielectric properties of dead Greyhound female dogs' brain tissues at different ages were measured at room temperature across the frequency range of 0.3-3 GHz. Measurements were made on excised tissues, in vitro in the laboratory, to carry out dielectric tests on sample tissues. Each dataset for a brain tissue was parametrized using the Cole-Cole expression, and the relevant Cole-Cole parameters for four tissue types are provided. A comparison was made with the database available in literature for other animals and human brain tissue...
September 22, 2016: Bioelectromagnetics
Oliver Rick, Ulrike von Hehn, Eberhard Mikus, Hermann Dertinger, Georg Geiger
No causal treatment for chemotherapy-induced peripheral neuropathy (CIPN) is known. Therefore, there is an urgent need to develop a therapy for CIPN. Only scarce clinical data are available concerning magnetic field therapy (MFT) in this context. We conducted a unicentric, randomized, double-blind, placebo-controlled phase-III trial of an MFT device versus placebo. In this study, we randomized 44 patients with CIPN to two treatment groups, where 21 patients were treated with MFT (Group 1) and 23 patients received placebo (Group 2)...
September 22, 2016: Bioelectromagnetics
Chunxiao Xu, Yang Yu, Yuxia Zhang, Yue Li, Shufeng Wei
We previously found that flowering of Arabidopsis was suppressed by near-null magnetic field, which was related to the modification of cryptochrome. To disclose the physiological mechanism of this effect, we detected gibberellin (GA) levels and expressions of GA biosynthetic and signaling genes in wild type Arabidopsis plants and cryptochrome double mutant, cry1/cry2, grown in near-null magnetic field. We found that levels of GA4 , GA9 , GA34 , and GA51 in wild type plants in near-null magnetic field were significantly decreased compared with local geomagnetic field controls...
September 6, 2016: Bioelectromagnetics
Vida Mildaziene, Giedre Pauzaite, Asta Malakauskiene, Rasa Zukiene, Zita Nauciene, Irina Filatova, Viktor Azharonok, Veronika Lyushkevich
Radiofrequency (5.28 MHz) electromagnetic radiation and low-temperature plasma were applied as short-term (2-15 min) seed treatments to two perennial woody plant species, including Smirnov's rhododendron (Rhododendron smirnowii Trautv.) and black mulberry (Morus nigra L.). Potential effects were evaluated using germination indices and morphometry. The results suggest that treatment with electromagnetic field stimulated germination of freshly harvested R. smirnowii seeds (increased germination percentage up to 70%), but reduced germination of fresh M...
August 30, 2016: Bioelectromagnetics
Maxim Zhadobov, Stanislav I Alekseev, Ronan Sauleau, Yann Le Page, Yves Le Dréan, Evgeny E Fesenko
Due to shallow penetration of millimeter waves (MMW) and convection in liquid medium surrounding cells, the problem of accurate assessment of local MMW heating in in vitro experiments remains unsolved. Conventional dosimetric MMW techniques, such as infrared imaging or fiber optic (FO) sensors, face several inherent limits. Here we propose a methodology for accurate local temperature measurement and subsequent specific absorption rate (SAR) retrieval using microscale thermocouples (TC). SAR was retrieved by fitting the measured initial temperature rise to the numerical solution of an equivalent thermal model...
August 29, 2016: Bioelectromagnetics
Mónica Ambriz-Tututi, Beatriz Alvarado-Reynoso, René Drucker-Colín
The objective of the present study was to assess the benefits of 1-week repetitive transcranial magnetic stimulation (rTMS) in patients with chronic low back pain (LBP). The visual analogue scale (VAS), Short Form McGill pain questionnaire (SF-MPQ), and Short Form 36 Health Survey were used to evaluate the effect of this treatment. Eighty-two patients diagnosed with LBP were divided randomly into three groups: rTMS-treated group, sham group, and physical therapy-treated group. We observed a significant reduction in VAS and SF-MPQ scores in the rTMS-treated group, but not in the sham group...
August 22, 2016: Bioelectromagnetics
Hayk Harutyunyan, Vahe Mkrtchyan, Karine Sukiasyan, Gohar Sahakyan, Gayane Poghosyan, Ani Soghomonyan, Eugene Cherniavsky, Ekaterina Bondarenko, Vladimir Shkumatov
The aim of this study was to investigate the effect of the external electrostatic field (ESF) on some hematological parameters in rats. Both in vivo and in vitro experiments were carried out. In in vivo investigations, rats were exposed to ESF (200 kV/m) during short (1 h) and long periods (6 days, 6 h daily). For in vitro study, the blood of intact rats was exposed to ESF for 1 h. Blood hematology was measured using validated ABX Micros ESV 60 Veterinary Hematology Analyzer. DNA damage in blood leucocytes was detected by means of comet assay...
August 17, 2016: Bioelectromagnetics
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October 2016: Bioelectromagnetics
Stan de Kleijn, Gerben Ferwerda, Michelle Wiese, Jos Trentelman, Jan Cuppen, Tamas Kozicz, Linda de Jager, Peter W M Hermans, B M Lidy Verburg-van Kemenade
There is still uncertainty whether extremely low frequency electromagnetic fields (ELF-EMF) can induce health effects like immunomodulation. Despite evidence obtained in vitro, an unambiguous association has not yet been established in vivo. Here, mice were exposed to ELF-EMF for 1, 4, and 24 h/day in a short-term (1 week) and long-term (15 weeks) set-up to investigate whole body effects on the level of stress regulation and immune response. ELF-EMF signal contained multiple frequencies (20-5000 Hz) and a magnetic flux density of 10 μT...
October 2016: Bioelectromagnetics
Murat Aydin, Mahmut Sinan Taspinar, Zeynep Elibol Cakmak, Rahmi Dumlupinar, Guleray Agar
Deoxyribonucleic acid (DNA) is always damaged by endogenous and exogenous factors. Magnetic field (MF) is one of these exogenous factors. When repair mechanisms are not sufficient, mainly because of imbalance in damage or mistakes in repair mechanisms, methylation of DNA results in polymorphism-related abnormalities. In this study, low intensity static magnetic field-induced DNA damage and methylation in wheat calli were investigated by using Random Amplified Polymorphic DNA and Coupled Restriction Enzyme Digestion-Random Amplification techniques...
October 2016: Bioelectromagnetics
Leeor Alon, Daniel K Sodickson, Cem M Deniz
Deposition of radiofrequency (RF) energy can be quantified via electric field or temperature change measurements. Magnetic resonance imaging has been used as a tool to measure three dimensional small temperature changes associated with RF radiation exposure. When duration of RF exposure is long, conversion from temperature change to specific absorption rate (SAR) is nontrivial due to prominent heat-diffusion and conduction effects. In this work, we demonstrated a method for calculation of SAR via an inversion of the heat equation including heat-diffusion and conduction effects...
October 2016: Bioelectromagnetics
Alexis J Haas, Yann Le Page, Maxim Zhadobov, Artem Boriskin, Ronan Sauleau, Yves Le Dréan
Millimeter waves (MMW) will be increasingly used for future wireless telecommunications. Previous studies on skin keratinocytes showed that MMW could impact the mRNA expression of Transient Receptor Potential cation channel subfamily Vanilloid, member 2 (TRPV2). Here, we investigated the effect of MMW exposure on this marker, as well as on other membrane receptors such as Transient Receptor Potential cation channel subfamily Vanilloid, member 1 (TRPV1) and purinergic receptor P2X, ligand-gated ion channel, 3 (P2 × 3)...
October 2016: Bioelectromagnetics
Yu Zheng, Yang Gao, Ruijuan Chen, Huiquan Wang, Lei Dong, Junrong Dou
Time-varying electromagnetic fields (EMF) can induce some physiological effects in neuronal tissues, which have been explored in many applications such as transcranial magnetic stimulation. Although transmembrane potentials and induced currents have already been the subjects of many theoretical studies, most previous works about this topic are mainly completed by utilizing Maxwell's equations, often by solving a Laplace equation. In previous studies, cells were often considered to be three-compartment models with different electroconductivities in different regions (three compartments are often intracellular regions, membrane, and extracellular regions)...
October 2016: Bioelectromagnetics
Li Wang, Stan Jelle Hoogcarspel, Zhifei Wen, Marco van Vulpen, David P Molkentine, Jan Kok, Steven H Lin, Roel Broekhuizen, Kie-Kian Ang, Niels Bovenschen, Bas W Raaymakers, Steven J Frank
Devices that combine magnetic resonance imaging with linear accelerators (MRL) represent a novel tool for MR-guided radiotherapy. However, whether magnetic fields (MFs) generated by these devices affect the radiosensitivity of tumors is unknown. We investigated the influence of a 1.5-T MF on cell viability and radioresponse of human solid tumors. Human head/neck cancer and lung cancer cells were exposed to single or fractionated 6-MV X-ray radiation; effects of the MF on cell viability were determined by cell plating efficiency and on radioresponsiveness by clonogenic cell survival...
October 2016: Bioelectromagnetics
Lokesh Baghel, Sunita Kataria, Kadur Narayan Guruprasad
The effectiveness of magnetopriming was assessed for alleviation of salt-induced adverse effects on soybean growth. Soybean seeds were pre-treated with static magnetic field (SMF) of 200 mT for 1 h to evaluate the effect of magnetopriming on growth, carbon and nitrogen metabolism, and yield of soybean plants under different salinity levels (0, 25, and 50 mM NaCl). The adverse effect of NaCl-induced salt stress was found on growth, yield, and various physiological attributes of soybeans. Results indicate that SMF pre-treatment significantly increased plant growth attributes, number of root nodules, nodules, fresh weight, biomass accumulation, and photosynthetic performance under both non-saline and saline conditions as compared to untreated seeds...
October 2016: Bioelectromagnetics
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