Pulsed magnetic field enhances therapeutic efficiency of mesenchymal stem cells in chronic neuropathic pain model
Cell‐based or magnetic field therapies as alternative approaches to pain management have been tested in several experimental pain models. The aim of this study therefore was to investigate the actions of the cell‐based therapy (adipose tissue derived mesenchymal stem cells; ADMSC) or pulsed magnetic field (PMF) therapy and magneto‐cell therapy (combination of ADMSC and PMF) in chronic constriction nerve injury model (CCI). The actions of individual ADMSC (route dependent [systemic or local], time‐dependent [a day or a week after surgery]), or PMF and their combination (magneto‐cell) therapies on hyperalgesia and ...
Source: Bioelectromagnetics - January 27, 2017 Category: Radiology Authors: Tufan Mert, Akif Hakan Kurt, İdiris Altun, Ahmet Celik, Furkan Baran, Ismail Gunay Tags: Research Article Source Type: research
Efficacy of 50 Hz electromagnetic fields on human epidermal stem cell transplantation seeded in collagen sponge scaffolds for wound healing in a murine model
To explore the possible efficacy of electromagnetic fields (EMF) for skin tissue engineering, effects of EMF exposure on epidermal stem cells (ESC) seeded in collagen sponge scaffolds for wound healing in a murine model were investigated. The wound models of a full‐thickness defect established with 36 7 ∼ 8‐week‐old nude mice were randomly divided into three groups: a control group, an ESC‐only group, and an ESC with EMF exposure group (frequency of 50 Hz, magnetic induction of 5 mT, 60 min per day for 20 days). ESC were separated from human foreskin and cultured in vitro, and then transplanted with col...
Source: Bioelectromagnetics - January 20, 2017 Category: Radiology Authors: Wen ‐Fang Bai, Wei‐Cheng Xu, Hong‐Xiang Zhu, Hong Huang, Bo Wu, Ming‐Sheng Zhang Tags: Research Article Source Type: research
Can body ‐worn devices be used for measuring personal exposure to mm waves?
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - January 19, 2017 Category: Radiology Authors: Arno Thielens, Luc Martens, Wout Joseph Tags: Letter to the Editor Source Type: research
Can body ‐worn devices be used for measuring personal exposure to mm waves¿
Fifth generation (5G) telecommunication networks will require more bandwidth and will use mm waves (30–300 GHz). Consequently, the aperture of antennas that are used for electromagnetic field measurements will be reduced in comparison to the ones currently used for lower frequencies (0.1–6 GHz). In combination with existing limits on incident power density prescribed by exposure guidelines, this provides an upper limit to received powers during exposure measurements. Simultaneously, an increase in the noise floor of transmitted signals will occur. These effects limit the dynamic range of measurements to 53 dB (2...
Source: Bioelectromagnetics - January 19, 2017 Category: Radiology Authors: Arno Thielens, Luc Martens, Wout Joseph Tags: Letter to the Editor Source Type: research
Study of potential health effects of electromagnetic fields of telephony and Wi ‐Fi, using chicken embryo development as animal model
The objective of this study is to investigate possible biological effects of radiofrequency electromagnetic fields (RF‐EMF) as used in modern wireless telecommunication in a well‐controlled experimental environment using chicken embryo development as animal model. Chicken eggs were incubated under continuous experimental exposure to GSM (1.8 GHz), DECT (1.88 GHz), UMTS (2.1 GHz), and WLAN (5.6 GHz) radiation, with the appropriate modulation protocol, using a homogeneous field distribution at a field strength of approximately 3 V/m, representing the maximum field level in a normal living environment. Radiation...
Source: Bioelectromagnetics - January 16, 2017 Category: Radiology Authors: Henri Woelders, Agnes de Wit, Alexander Lourens, Norbert Stockhofe, Bas Engel, Ina Hulsegge, Dirkjan Schokker, Paula van Heijningen, Stefan Vossen, Dave Bekers, Peter Zwamborn Tags: Research Article Source Type: research
Adverse and beneficial effects in Chinese hamster lung fibroblast cells following radiofrequency exposure
In this study, the effect of radiofrequency (RF) exposure to 1950 MHz, Universal Mobile Telecommunication System signal, was investigated in Chinese hamster lung fibroblast cell line (V79). Genotoxic and cytotoxic effects of 20‐h exposure at specific absorption rate (SAR) values from 0.15 W/kg to 1.25 W/kg were measured by means of cytokinesis‐block micronucleus (MN) assay. Exposure was carried out blinded under strictly controlled conditions of dosimetry and temperature. The effect of RF exposure alone at four SAR values was tested, that is, 0.15, 0.3, 0.6, and 1.25 W/kg. A statistically significant increase i...
Source: Bioelectromagnetics - January 10, 2017 Category: Radiology Authors: Anna Sannino, Olga Zeni, Stefania Romeo, Rita Massa, Maria Rosaria Scarfi Tags: Research Article Source Type: research
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(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - January 4, 2017 Category: Radiology Tags: Issue Information ‐ Page Source Type: research
The effects of electromagnetic fields on B16 ‐BL6 cells are dependent on their spatial and temporal character
Exposure to low intensity, low frequency electromagnetic fields (EMF) has effects on several biological systems. Spatiotemporal characteristics of these EMFs are critical. The effect of several complex EMF patterns on the proliferation of B16‐BL6 mouse melanoma cells was tested. Exposure to one of these patterns, the Thomas‐EMF, inhibited cell proliferation and promoted calcium uptake. The Thomas‐EMF is coded from a digital‐to‐analog file comprised of 849 points, which provides power to solenoids and can be set to alter timing, intensity, and duration of variable EMF. Setting the point duration to 3 ms generate...
Source: Bioelectromagnetics - December 27, 2016 Category: Radiology Authors: Carly A. Buckner, Alison L. Buckner, Stan A. Koren, Michael A. Persinger, Robert M. Lafrenie Tags: Research Article Source Type: research
Consideration of different heating lengths of needles with induction heating and resistance system: A novel design of needle module for thermal ablation
Thermal ablation using alternating electromagnetic fields is a promising method to treat tissues including tumors. With this approach, an electromagnetic field is generated around an induction coil, which is supplied with high frequency current from a power source. Any electrically conducting object, which is placed in the electromagnetic field, is then heated due to eddy currents. Basic principles underlying this novel thermotherapy needle system are internal induction and resistance heating. This presents a new design of a standard gauge 18 percutaneous trans‐hepatic cholangiography needle module combined with a compac...
Source: Bioelectromagnetics - December 26, 2016 Category: Radiology Authors: Huy ‐Tien Bui, Sheng‐Jye Hwang, Huei‐Huang Lee, Durn‐Yuan Huang Tags: Research Article Source Type: research
Pulsed electromagnetic field at different stages of knee osteoarthritis in rats induced by low ‐dose monosodium iodoacetate: Effect on subchondral trabecular bone microarchitecture and cartilage degradation
The aim of the study was to investigate the efficacy of pre‐emptive, early, and delayed pulsed electromagnetic field (PEMF) treatment on cartilage and subchondral trabecular bone in knee osteoarthritis (OA) rats induced by low‐dose monosodium iodoacetate (MIA). Seventy‐five 12‐week‐old male Sprague–Dawley rats were assigned to five groups: OA (n = 30), pre‐emptive PEMF (n = 10), early PEMF (n = 10), delayed PEMF (n = 10), and control (n = 15). Osteoarthritis was induced by injecting 0.2 mg MIA in rat's right knee joint. Control rats received a single sterile saline injection in the right...
Source: Bioelectromagnetics - December 26, 2016 Category: Radiology Authors: Xiaotian Yang, Hongchen He, Yuan Zhou, Yujing Zhou, Qiang Gao, Pu Wang, Chengqi He Tags: Research Article Source Type: research
RF ‐EMF exposure at 1800 MHz did not elicit DNA damage or abnormal cellular behaviors in different neurogenic cells
Despite many years of studies, the debate on genotoxic effects of radiofrequency electromagnetic fields (RF‐EMF) continues. To systematically evaluate genotoxicity of RF‐EMF, this study examined effects of RF‐EMF on DNA damage and cellular behavior in different neurogenic cells. Neurogenic A172, U251, and SH‐SY5Y cells were intermittently (5 min on/10 min off) exposed to 1800 MHz RF‐EMF at an average specific absorption rate (SAR) of 4.0 W/kg for 1, 6, or 24 h. DNA damage was evaluated by quantification of γH2AX foci, an early marker of DNA double‐strand breaks. Cell cycle progression, cell prolifera...
Source: Bioelectromagnetics - December 26, 2016 Category: Radiology Authors: Liling Su, Xiaoxia Wei, Zhengping Xu, Guangdi Chen Tags: Research Article Source Type: research
Assessment of polarization dependence of body shadow effect on dosimetry measurements in 2.4 GHz band
Personal exposure meters (PEMs) are portable measuring devices of electromagnetic field levels. Extreme proximity of the wearer causes an underestimation in logged data, known as body shadow effect (BSE), which undermines the reliability of exposure measurements. This paper analyzes the influence of horizontal polarization of the radiation source on PEM measurements in four multipath environments and under dynamic conditions, at a frequency band of 2.4 GHz. By comparing experimental measurements and simulated results, the PEM wearer is modeled theoretically as a shadow angle whose value is determined in terms of maximum ...
Source: Bioelectromagnetics - December 26, 2016 Category: Radiology Authors: Silvia de Miguel ‐Bilbao, Victoria Ramos, Juan Blas Tags: Letter to the Editor Source Type: research
Theoretical evidence of maximum intracellular currents versus frequency in an Escherichia coli cell submitted to AC voltage
In this work, the problem of intracellular currents in longilinear bacteria, such as Escherichia coli, suspended in a physiological medium and submitted to a harmonic voltage (AC), is analyzed using the Finite‐Element‐based software COMSOL Multiphysics. Bacterium was modeled as a cylindrical capsule, ended by semi‐spheres and surrounded by a dielectric cell wall. An equivalent single‐layer cell wall was defined, starting from the well‐recognized three‐shell modeling approach. The bacterium was considered immersed in a physiological medium, which was also taken into account in the modeling. A new complex transco...
Source: Bioelectromagnetics - December 24, 2016 Category: Radiology Authors: Pascal Xavier, Dominique Rauly, Eric Chamberod, Jean M.F. Martins Tags: Research Article Source Type: research
Effects of electromagnetic fields on bone loss in hyperthyroidism rat model
Optimal therapeutics for hyperthyroidism‐induced osteoporosis are still lacking. As a noninvasive treatment, electromagnetic fields (EMF) have been proven to be effective for treating osteoporosis in non‐hyperthyroidism conditions. We herein systematically evaluated the reduced effects of EMF on osteoporosis in a hyperthyroidism rat model. With the use of Helmholtz coils and an EMF stimulator, 15 Hz/1 mT EMF was generated. Forty‐eight 5‐month‐old male Sprague–Dawley rats were randomly divided into four different groups: control, levothyroxine treated (L‐T4), EMF exposure + levothyroxine (EMF + L...
Source: Bioelectromagnetics - December 14, 2016 Category: Radiology Authors: Chaoxu Liu, Yingchi Zhang, Tao Fu, Yang Liu, Sheng Wei, Yong Yang, Dongming Zhao, Wenchun Zhao, Mingyu Song, Xiangyu Tang, Hua Wu Tags: Research Article Source Type: research
Issue Information ‐ Page
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - December 6, 2016 Category: Radiology Tags: Issue Information ‐ Page Source Type: research
