Bioelectromagnetics最新文献

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Effects of exposure to alternating low-intensity, intermediate-frequency electric fields on the differentiation of human leukemic cell line U937 交变低强度中频电场对人白血病细胞系U937分化的影响。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-10-23 DOI: 10.1002/bem.22487
Rayehe Mamaghaniyeh MSc, Amirali Zandieh MSc, Bahram Goliaei PhD, Maryam S. Nezamtaheri PhD, Seyed P. Shariatpanahi PhD
{"title":"Effects of exposure to alternating low-intensity, intermediate-frequency electric fields on the differentiation of human leukemic cell line U937","authors":"Rayehe Mamaghaniyeh MSc,&nbsp;Amirali Zandieh MSc,&nbsp;Bahram Goliaei PhD,&nbsp;Maryam S. Nezamtaheri PhD,&nbsp;Seyed P. Shariatpanahi PhD","doi":"10.1002/bem.22487","DOIUrl":"10.1002/bem.22487","url":null,"abstract":"<p>Studying the bioeffects of electric fields have been the subject of ongoing research which led to promising therapeutic effect, particularly in cancer treatment. Here, we investigated the impact of low-intensity, intermediate-frequency alternating electric fields on the differentiation of human myeloid leukemia cell line U937. The results showed a near twofold increase in differentiation of U937 cells treated for 24 h by alternating 600 kHz, 150 V/m electric fields, in comparison to their control groups. This measure was evaluated by latex bead phagocytosis assay, nitro blue tetrazolium test, and cell cycle analysis which revealed a significant shift in the number of cells from G<sub>2</sub>+M to G<sub>0</sub>+G<sub>1</sub> phases. The simulation result for the intracellular field intensity showed around 50% attenuation with respect to the applied external field for our setup which ruled out masking of the applied field by the internal electric noise of the cell. Based on previous studies we postulate a possible calcium-related effect for the observed differentiation, yet the exact underlying mechanism requires further investigation. Finally, our results may offer a potential therapeutic method for leukemia in the future.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"45 2","pages":"48-57"},"PeriodicalIF":1.9,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49688636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the radiofrequency-induced heating inside the human head with dental implants at 7 T 7岁时种植牙对人头部射频感应加热的研究 T
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-10-20 DOI: 10.1002/bem.22490
Song Duan MEng, Xiuxiu Wu MEng, Juntian Shi MSc, Wenhui Li MMed, Qingshan Dong MD, Sherman Xuegang Xin PhD
{"title":"Study of the radiofrequency-induced heating inside the human head with dental implants at 7 T","authors":"Song Duan MEng,&nbsp;Xiuxiu Wu MEng,&nbsp;Juntian Shi MSc,&nbsp;Wenhui Li MMed,&nbsp;Qingshan Dong MD,&nbsp;Sherman Xuegang Xin PhD","doi":"10.1002/bem.22490","DOIUrl":"10.1002/bem.22490","url":null,"abstract":"<p>Conductive dental implants are commonly used in restorative therapy to replace missing teeth in patients. Ensuring the radiofrequency (RF) safety of these patients is crucial when performing 7 T magnetic resonance scans of their heads. This study aimed to investigate RF-induced heating inside the human head with dental implants at 7 T. Dental implants and their attachments were fabricated and integrated into an anatomical head model, creating different measurement configurations (MCs). Numerical simulations were conducted using a 7 T transmit coil loaded with the anatomical head model, both with and without dental implants. The maximum temperatures inside the head for various MCs were computed using the maximum permissible input powers (MPIPs) obtained without dental implants and compared with published limits. Additionally, the MPIPs with dental implants were calculated for scenarios where the temperature limits were exceeded. The maximum temperatures observed inside the head ranged from 38.4°C to 39.6°C. The MPIPs in the presence of dental implants were 81.9%–97.3% of the MPIPs in the absence of dental implants for scenarios that exceeded the regulatory limit. RF-induced heating effect of the dental implants was not significant. The safe scanning condition in terms of RF exposure was achievable for patients with dental implants. For patients with conductive dental implants of unknown configuration, it is recommended to reduce the input power by 18.1% of MPIP without dental implants to ensure RF safety.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"45 2","pages":"82-93"},"PeriodicalIF":1.9,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49673963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A systematic review on cellular responses of Escherichia coli to nonthermal electromagnetic irradiation 大肠杆菌对非热电磁辐射的细胞反应系统综述。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-10-08 DOI: 10.1002/bem.22484
Khadijeh Askaripour PhD, Arkadiusz Żak PhD
{"title":"A systematic review on cellular responses of Escherichia coli to nonthermal electromagnetic irradiation","authors":"Khadijeh Askaripour PhD,&nbsp;Arkadiusz Żak PhD","doi":"10.1002/bem.22484","DOIUrl":"10.1002/bem.22484","url":null,"abstract":"<p>Investigation of <i>Escherichia coli</i> under electromagnetic fields is of significance in human studies owing to its short doubling time and human-like DNA mechanisms. The present review aims to systematically evaluate the literature to conclude causality between 0 and 300 GHz electromagnetic fields and biological effects in <i>E. coli</i>. To that end, the OHAT methodology and risk of bias tool were employed. Exponentially growing cells exposed for over 30 min at temperatures up to <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>3</mn>\u0000 \u0000 <msup>\u0000 <mn>7</mn>\u0000 \u0000 <mo>∘</mo>\u0000 </msup>\u0000 \u0000 <mi>C</mi>\u0000 </mrow>\u0000 <annotation> $3{7}^{circ },{rm{C}}$</annotation>\u0000 </semantics></math> with fluctuations below <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mn>1</mn>\u0000 \u0000 <mo>∘</mo>\u0000 </msup>\u0000 \u0000 <mi>C</mi>\u0000 </mrow>\u0000 <annotation> ${1}^{circ },{rm{C}}$</annotation>\u0000 </semantics></math> were included from the Web-of-Knowledge, PubMed, or EMF-Portal databases. Out of 904 records identified, 25 articles satisfied the selection criteria, with four excluded during internal validation. These articles examined cell growth (11 studies), morphology (three studies), and gene regulation (11 studies). Most experiments (85%) in the included studies focused on the extremely low-frequency (ELF) range, with 60% specifically at 50 Hz. Changes in growth rate were observed in 74% of ELF experiments and 71% of radio frequency (RF) experiments. Additionally, 80% of ELF experiments showed morphology changes, while gene expression changes were seen in 33% (ELF) and 50% (RF) experiments. Due to the limited number of studies, especially in the intermediate frequency and RF ranges, establishing correlations between EMF exposure and biological effects on <i>E. coli</i> is not possible.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"45 1","pages":"16-29"},"PeriodicalIF":1.9,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41149075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EMEMI: An interference-free mini-incubator with integrated electric and magnetic field exposure for real-time microscopic imaging of field effects EMEMI:一款集成电场和磁场曝光的无干扰迷你培养箱,用于场效应的实时显微镜成像。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-10-03 DOI: 10.1002/bem.22483
Farhad Alizadeh MSc, Mehrdad Saviz PhD, Farbod Khoraminia MSc, Ali Talebipour MSc, Rana Imani PhD, Iman Shabani PhD
{"title":"EMEMI: An interference-free mini-incubator with integrated electric and magnetic field exposure for real-time microscopic imaging of field effects","authors":"Farhad Alizadeh MSc,&nbsp;Mehrdad Saviz PhD,&nbsp;Farbod Khoraminia MSc,&nbsp;Ali Talebipour MSc,&nbsp;Rana Imani PhD,&nbsp;Iman Shabani PhD","doi":"10.1002/bem.22483","DOIUrl":"10.1002/bem.22483","url":null,"abstract":"<p>Uninterrupted microscopic observation and real-time imaging of cell behavior during exposure to the stimulus, for example, electric and/or magnetic fields, especially for periods of several days, has been a challenge in experimental bioelectromagnetics due to a lack of proper gas/temperature conditions outside the incubator. Conventional mini-incubators might suffer from stray fields produced by heating elements. We report an in vitro electric and magnetic fields (EMF) exposure system embedded inside a novel under-the-microscope mini-CO<sub>2</sub>-incubator with a unique design to avoid electromagnetic interference from the heating and circulation functions while ensuring the requisite temperature. A unique, reconfigurable array of electrodes and/or coils excited by calculated current distributions among array elements is designed to provide excellent field uniformity and controllable linear or circular polarization (even at very low frequencies) of the EMF within the cell culture. Using standard biochemical assays, long-term cell viability has been verified and compared with a conventional incubator. Cell orientation/migration in three-dimensional culture made of collagen-hydrogels has been successfully observed in vitro, in long-term, and in real-time under the influence of DC electric fields with the device.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"45 2","pages":"33-47"},"PeriodicalIF":1.9,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41117934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel nonsurgical therapy for peri-implantitis using focused pulsed electromagnetic field: A pilot randomized double-blind controlled clinical trial 聚焦脉冲电磁场治疗种植体周围炎的一种新的非手术治疗方法:一项随机双盲对照临床试验。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-09-01 DOI: 10.1002/bem.22481
Yaniv Mayer DMD, Juan Khoury DMD, Jacob Horwitz, Ofir Ginesin MSc, Luigi Canullo PhD, Eran Gabay PhD, Hadar Z. Giladi PhD
{"title":"A novel nonsurgical therapy for peri-implantitis using focused pulsed electromagnetic field: A pilot randomized double-blind controlled clinical trial","authors":"Yaniv Mayer DMD,&nbsp;Juan Khoury DMD,&nbsp;Jacob Horwitz,&nbsp;Ofir Ginesin MSc,&nbsp;Luigi Canullo PhD,&nbsp;Eran Gabay PhD,&nbsp;Hadar Z. Giladi PhD","doi":"10.1002/bem.22481","DOIUrl":"10.1002/bem.22481","url":null,"abstract":"<p>Pulsed electromagnetic field (PEMF) therapy modulates the immune response and is successfully used in orthopedics to treat osteoarthritis and improve bone regeneration. This may suggest that this treatment may consequently reduce peri-implant soft tissue inflammation and marginal bone loss. To compare clinical, radiographic, and immunological results following nonsurgical treatment for peri-implantitis with or without PEMF therapy. Patients with peri-implantitis were included: pocket probing depth (PPD) between 6 and 8 mm with bleeding on probing (BOP); crestal bone loss between 3 and 5 mm. A novel healing abutment that contained active (test) or inactive (control) PEMF was connected. PEMF was administered via the abutment at exposure ratio of 1/500–1/5000, intensity: 0.05–0.5 mT, frequency: 10–50 kHz for 30 days. Nonsurgical mechanical implant surface debridement was performed. Patients were examined at baseline, 1 and 3 months. Clinical assessment included: plaque index, BOP, PPD, recession, and bone crest level which was radiography measured. Samples of peri-implant crevicular fluid were taken to analyze interleukin-1β (IL-1β). Twenty-three patients (34 implants; 19 control, 15 test) were included. At the follow-up, mean crestal bone loss was lower in the test group at 1 and 3 months (2.48 mm vs. 3.73 mm, <i>p</i> &lt; 0.05 and 2.39 vs. 3.37, <i>p</i> &lt; 0.01). IL-1β levels were also lower in the test group at 2 weeks (72.86 pg/mL vs. 111.7, <i>p</i> &lt; 0.05). Within all the limitation of this preliminary study, the test group improved clinical parameters after a short-term period compared to the control group.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 7-8","pages":"144-155"},"PeriodicalIF":1.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bem.22481","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10185802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of ultra-strong static magnetic field on the gut microbiota of humans and mice 超强静磁场对人和小鼠肠道菌群的影响。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-09-01 DOI: 10.1002/bem.22482
Wen Zhao PhD, Yijuan Han PhD, Dongyan Shao PhD, Cuicui Han PhD, Yixiao Tian PhD, Qingsheng Huang PhD
{"title":"Effects of ultra-strong static magnetic field on the gut microbiota of humans and mice","authors":"Wen Zhao PhD,&nbsp;Yijuan Han PhD,&nbsp;Dongyan Shao PhD,&nbsp;Cuicui Han PhD,&nbsp;Yixiao Tian PhD,&nbsp;Qingsheng Huang PhD","doi":"10.1002/bem.22482","DOIUrl":"10.1002/bem.22482","url":null,"abstract":"<p>To explore the effect of ultra-strong static magnetic field on gut microbiota, 16 T static magnetic field was used to study the changes in the structure and composition of human and mouse gut microbiota in this environment. In the mouse gut microbiota, at the genus level, the magnetic field significantly decreased the relative abundances of <i>Escherichia-Shigella, Lactobacillus, Enterococcus, Burkholderia-Caballeronia-Paraburkholderia, Parasutterella</i>, and <i>Ralstonia</i> and significantly increased those of <i>Parabacteroides, Alloprevotella, Alistipes, Odoribacter, Bacteroides, Mucispirillum, Sutterella</i>, and <i>Prevotellaceae_UCG-001</i>. Similarly, at the genus level, the relative abundances of <i>Bacteroides</i>, <i>Parabacteroides, Romboutsia, and Streptococcus</i> significantly decreased in the human gut microbiota. Contrary to the changing trend of the abundance in the mouse gut, the abundances of <i>Bacteroides</i> and <i>Parabacteroides</i> in the human gut were significantly reduced under magnetic field. The BugBase phenotypic prediction analysis showed that the relative abundances of five phenotypes, including anaerobism, mobile elements, potential pathogenicity, stress-tolerant, and biofilm formation, changed significantly in the mouse gut microbiota, while the relative abundances of two phenotypes, including Gram-positive and Gram-negative phenotypes, changed significantly in the human gut microbiota. The 16 T magnetic field could differently affect the composition, structure, and phenotypes of gut microbiota in human and mice, suggesting the importance of model selection in studying the biological effects of magnetic field.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 7-8","pages":"211-220"},"PeriodicalIF":1.9,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10129956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to “The effects of weak magnetic fields on radical pairs” 修正“弱磁场对自由基对的影响”。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-08-09 DOI: 10.1002/bem.22480
{"title":"Correction to “The effects of weak magnetic fields on radical pairs”","authors":"","doi":"10.1002/bem.22480","DOIUrl":"10.1002/bem.22480","url":null,"abstract":"<p>Barnes, F.S., Greenebaum, B.: The effects of weak magnetic fields on radical pairs. Bioelectromagnetics 36, 45–54 (2015). https://doi.org/10.1002/bem.21883</p><p>The text in the lines preceding Equation (2) should read:</p><p>The section below should be deleted:</p><p>“where neq is the number of … by a factor of 2.”</p><p>We apologize for these errors.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 7-8","pages":"221"},"PeriodicalIF":1.9,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bem.22480","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10014100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of exposure to radiofrequency LTE signal and coexposure to mitomycin-C in Chinese hamster lung fibroblast V79 cells 中国仓鼠肺成纤维细胞 V79 暴露于射频 LTE 信号和同时暴露于丝裂霉素-C 的影响。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-07-26 DOI: 10.1002/bem.22478
Anna Sannino PhD, Stefania Romeo PhD, Maria Rosaria Scarfì, Daniele Pinchera PhD, Fulvio Schettino PhD, Mario Alonzo PhD, Mariateresa Allocca PhD, Olga Zeni PhD
{"title":"The effect of exposure to radiofrequency LTE signal and coexposure to mitomycin-C in Chinese hamster lung fibroblast V79 cells","authors":"Anna Sannino PhD,&nbsp;Stefania Romeo PhD,&nbsp;Maria Rosaria Scarfì,&nbsp;Daniele Pinchera PhD,&nbsp;Fulvio Schettino PhD,&nbsp;Mario Alonzo PhD,&nbsp;Mariateresa Allocca PhD,&nbsp;Olga Zeni PhD","doi":"10.1002/bem.22478","DOIUrl":"10.1002/bem.22478","url":null,"abstract":"<p>This study aims to investigate the cellular effects of radiofrequency exposure, 1950 MHz, long-term evolution (LTE) signal, administered alone and in combination with mitomycin-C (MMC), a well-known cytotoxic agent. Chinese hamster lung fibroblast (V79) cells were exposed/sham exposed in a waveguide-based system under strictly controlled conditions of both electromagnetic and environmental parameters, at specific absorption rate (SAR) of 0.3 and 1.25 W/kg. Chromosomal damage (micronuclei formation), oxidative stress (reactive oxygen species [ROS] formation), and cell cycle progression were analyzed after exposure and coexposure. No differences between exposed samples and sham-controls were detected following radiofrequency exposure alone, for all the experimental conditions tested and biological endpoints investigated. When radiofrequency exposure was followed by MMC treatment, 3 h pre-exposure did not modify MMC-induced micronuclei. Pre-exposure of 20 h at 0.3 W/kg did not modify the number of micronuclei induced by MMC, while 1.25 W/kg resulted in a significant reduction of MMC-induced damage. Absence of effects was also detected when CW was used, at both SAR levels. MMC-induced ROS formation resulted significantly decreased at both SAR levels investigated, while cell proliferation and cell cycle progression were not affected by coexposures. The results here reported provide no evidence of direct effects of 1950 MHz, LTE signal. Moreover, they further support our previous findings on the capability of radiofrequency pre-exposure to induce protection from a subsequent toxic treatment, and the key role of the modulated signals and the experimental conditions adopted in eliciting the effect.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"45 3","pages":"97-109"},"PeriodicalIF":1.9,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bem.22478","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9870616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of combined effects of brief electrical stimulation and Schwann-like cells on sciatic nerve injury model 短暂电刺激与雪旺样细胞联合作用对坐骨神经损伤模型的影响。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-07-18 DOI: 10.1002/bem.22479
Mahmut Alp Kilic PhD, Aynur Abdulova MSc, Gamze Tanriverdi PhD, Mehmet Dincer Bilgin PhD
{"title":"Evaluation of combined effects of brief electrical stimulation and Schwann-like cells on sciatic nerve injury model","authors":"Mahmut Alp Kilic PhD,&nbsp;Aynur Abdulova MSc,&nbsp;Gamze Tanriverdi PhD,&nbsp;Mehmet Dincer Bilgin PhD","doi":"10.1002/bem.22479","DOIUrl":"10.1002/bem.22479","url":null,"abstract":"<p>Severe nerve injuries can be treated with electrical stimulation and stem cell therapies, but little is known about the potential benefits of combining these two treatments. In an effort to investigate this combination, we conducted a study to evaluate the effectiveness of electrical stimulation and Schwann-like cell transplantation in female Wistar albino rats. Our study consisted of five groups of rats: a sham group, an injury group, an electrical stimulation group, a Schwann-like cell group, and a combination group. The experimental groups received electrical stimulation, Schwann-like cell transplantation, or both. The animals sciatic function index was evaluated during a 6-week recovery period, and nerve conduction velocity, wet muscle mass, and nerve tissues were also analyzed. The results of the study showed that all experimental groups had a faster functional recovery compared to the injury group, although the difference between groups was not statistically significant. Both the combination group and the Schwann-like cell transplantation group had a higher nerve conduction velocity compared to the other experimental groups. However, there was no significant difference between the combination and Schwann-like cell transplantation groups. Nonetheless, histological analysis showed a better axonal reorganization in the combination group. The study provides preliminary evidence of the potential benefits of combining electrical stimulation and Schwann-like cell transplantation in treating severe nerve injuries. However, further studies with larger sample sizes are needed to confirm these findings and optimize the treatment parameters.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 7-8","pages":"192-203"},"PeriodicalIF":1.9,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9822495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A new synthesis method for complex electric field patterning using a multichannel dense array system with applications in low-intensity noninvasive neuromodulation 一种利用多通道密集阵列系统合成复杂电场图的新方法,在低强度无创神经调节中的应用。
IF 1.9 3区 生物学
Bioelectromagnetics Pub Date : 2023-07-15 DOI: 10.1002/bem.22476
Matthew C. Smith PhD, Daniel F. Sievenpiper PhD
{"title":"A new synthesis method for complex electric field patterning using a multichannel dense array system with applications in low-intensity noninvasive neuromodulation","authors":"Matthew C. Smith PhD,&nbsp;Daniel F. Sievenpiper PhD","doi":"10.1002/bem.22476","DOIUrl":"10.1002/bem.22476","url":null,"abstract":"<p>Multichannel coil array systems offer precise spatiotemporal electronic steering and patterning of electric and magnetic fields without the physical movement of coils or magnets. This capability could potentially benefit a wide range of biomagnetic applications such as low-intensity noninvasive neuromodulation or magnetic drug delivery. In this regard, the objective of this work is to develop a unique synthesis method, that enabled by a multichannel dense array system, generates complex current pattern distributions not previously reported in the literature. Simulations and experimental results verify that highly curved or irregular (e.g., zig–zag) patterns at singular and multiple sites can be efficiently formed using this method. The synthesis method is composed of three primary components; a <i>pixel cell</i> (basic unit of pattern formation), a <i>template array</i> (“virtual array”: code that disseminates the coil current weights to the “physical” dense array), and a hexagonal coordinate system. Low-intensity or low-field magnetic stimulation is identified as a potential application that could benefit from this work in the future and as such is used as an example to frame the research.</p>","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 7-8","pages":"156-180"},"PeriodicalIF":1.9,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9834922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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