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Wójcik-Piotrowicz K, Kaszuba-Zwoińska J, Piszczek P, Nowak B, Guzdek P, Gil K, Rokita E. Low-frequency electromagnetic fields influence the expression of calcium metabolism related proteins in leukocytic cell lines. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 104:104320. [PMID: 37984675 DOI: 10.1016/j.etap.2023.104320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 11/11/2023] [Accepted: 11/15/2023] [Indexed: 11/22/2023]
Abstract
Our study aimed to verify the hypothesis concerning low-frequency magnetic fields (LF-MFs)-related changes in cell viability through the biomechanism(s) based on calcineurin (CaN)-mediated signaling pathways triggered via ROS-like molecules. For experiments, Mono Mac 6 and U937 leukocytic cell lines were chosen and exposed to various LF-MFs and/or puromycin (PMC). The protein expression level of key regulatory proteins of calcium metabolism was examined by Western Blot analysis. In turn, the reactive oxygen species (ROS) and cell viability parameters were evaluated by cytochrome C reduction assay and flow cytometry, respectively. The simultaneous action of applied MF and PMC influenced cell viability in a MF-dependent manner. The changes in cell viability were correlated with protein expression and ROS levels. It was verified experimentally that applied stress stimuli influence cell susceptibility to undergo cell death. Moreover, the evoked bioeffects might be recognized as specific to both types of leukocyte populations.
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Affiliation(s)
- Karolina Wójcik-Piotrowicz
- Department of Biophysics, Jagiellonian University Medical College, Łazarza street 16, 31-530 Cracow, Poland.
| | - Jolanta Kaszuba-Zwoińska
- Department of Pathophysiology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Piotr Piszczek
- Department of Pathophysiology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Bernadeta Nowak
- Department of Immunology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Piotr Guzdek
- Łukasiewicz Research Network - Institute of Microelectronics and Photonics, Lotników street 32/46, 02-668 Warsaw, Poland
| | - Krzysztof Gil
- Department of Pathophysiology, Jagiellonian University Medical College, Czysta street 18, 31-121 Cracow, Poland
| | - Eugeniusz Rokita
- Department of Biophysics, Jagiellonian University Medical College, Łazarza street 16, 31-530 Cracow, Poland
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2
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Wei Y, Wang X. Biological effects of rotating magnetic field: A review from 1969 to 2021. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2023; 178:103-115. [PMID: 36574882 DOI: 10.1016/j.pbiomolbio.2022.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 11/28/2022] [Accepted: 12/22/2022] [Indexed: 12/25/2022]
Abstract
As one of the common variable magnetic fields, rotating magnetic field (RMF) plays a crucial role in modern human society. The biological effects of RMF have been studied for over half a century, and various results have been discovered. Several reports have shown that RMF can inhibit the growth of various types of cancer cells in vitro and in vivo and improve clinical symptoms of patients with advanced cancer. It can also affect endogenous opioid systems and rhythm in central nerve systems, promote nerve regeneration and regulate neural electrophysiological activity in the human brain. In addition, RMF can influence the growth and metabolic activity of some microorganisms, alter the properties of fermentation products, inhibit the growth of some harmful bacteria and increase the susceptibility of antibiotic-resistant bacteria to common antibiotics. Besides, there are other biological effects of RMF on blood, bone, prenatal exposure, enzyme activity, immune function, aging, parasite, endocrine, wound healing, and plants. These discoveries demonstrate that RMF have great application potential in health care, medical treatment, fermentation engineering, and even agriculture. However, in some cases like pregnancy, RMF exposure may need to be avoided. Finally, the specific mechanisms of RMF's biological effects remain unrevealed, despite various hypotheses and theories. It does not prevent us from using it for our good.
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Affiliation(s)
- Yunpeng Wei
- Department of Physiology, School of Medical Science, Shenzhen University, Shenzhen, Guangdong, 518061, China
| | - Xiaomei Wang
- Department of Physiology, School of Medical Science, Shenzhen University, Shenzhen, Guangdong, 518061, China.
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3
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Hypomagnetic Fields and Their Multilevel Effects on Living Organisms. Processes (Basel) 2023. [DOI: 10.3390/pr11010282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The Earth’s magnetic field is one of the basic abiotic factors in all environments, and organisms had to adapt to it during evolution. On some occasions, organisms can be confronted with a significant reduction in a magnetic field, termed a “hypomagnetic field—HMF”, for example, in buildings with steel reinforcement or during interplanetary flight. However, the effects of HMFs on living organisms are still largely unclear. Experimental studies have mostly focused on the human and rodent models. Due to the small number of publications, the effects of HMFs are mostly random, although we detected some similarities. Likely, HMFs can modify cell signalling by affecting the contents of ions (e.g., calcium) or the ROS level, which participate in cell signal transduction. Additionally, HMFs have different effects on the growth or functions of organ systems in different organisms, but negative effects on embryonal development have been shown. Embryonal development is strictly regulated to avoid developmental abnormalities, which have often been observed when exposed to a HMF. Only a few studies have addressed the effects of HMFs on the survival of microorganisms. Studying the magnetoreception of microorganisms could be useful to understand the physical aspects of the magnetoreception of the HMF.
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Chen Y, Lu C, Shang X, Wu K, Chen K. Primary cilia: The central role in the electromagnetic field induced bone healing. Front Pharmacol 2022; 13:1062119. [DOI: 10.3389/fphar.2022.1062119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/07/2022] [Indexed: 12/03/2022] Open
Abstract
Primary cilia have emerged as the cellular “antenna” that can receive and transduce extracellular chemical/physical signals, thus playing an important role in regulating cellular activities. Although the electromagnetic field (EMF) is an effective treatment for bone fractures since 1978, however, the detailed mechanisms leading to such positive effects are still unclear. Primary cilia may play a central role in receiving EMF signals, translating physical signals into biochemical information, and initiating various signalingsignaling pathways to transduce signals into the nucleus. In this review, we elucidated the process of bone healing, the structure, and function of primary cilia, as well as the application and mechanism of EMF in treating fracture healing. To comprehensively understand the process of bone healing, we used bioinformatics to analyze the molecular change and associated the results with other studies. Moreover, this review summarizedsummarized some limitations in EMFs-related research and provides an outlook for ongoing studies. In conclusion, this review illustrated the primary cilia and related molecular mechanisms in the EMF-induced bone healing process, and it may shed light on future research.
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Ozturk H, Saribal D, Gelmez YM, Deniz G, Yilmaz A, Kirectepe A, Ercan AM. Extremely low frequency electromagnetic fields exposure during the prenatal and postnatal periods alters pro-inflammatory cytokines levels by gender. Electromagn Biol Med 2022; 41:163-173. [PMID: 35232334 DOI: 10.1080/15368378.2022.2046045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Maternal exposure to the excessive electromagnetic fields is considered harmful to infants and associated with several health problems in life, such as neurological or immune diseases. In this present study we aimed to investigate the potential effects of extremely low-frequency electromagnetic field (ELF-EMF) exposure during the gestational and lactational period of dams on immune system parameters. The development of white blood cells (WBC), lymphocyte subpopulations (CD4+ T cells, CD8+ T cells, Natural Killer (NK) cells, and B cells) and production of T cell related cytokines were explored in the offsprings. Significant changes were found in WBC and lymphocyte counts. Although no changes in lymphocyte subunits were observed among groups, CD4+ cells were significantly increased in the female group exposed to ELF-EMF. Also, IL-17A and IFN-γ levels increased in plasma and spleen. The mean IL-4 level and the expression level of the IL-4 gene were not changed, in the experimental groups. But the expression of the IL-17A gene was also upregulated, which supports cytokine quantification analyses. In conclusion, ELF-EMF exposure in the prenatal and postnatal period increases the level of IL-17A in the spleen and blood of young female rats, and it upregulates IL-17 gene expression in the spleen, resulting in CD4+ cell proliferation and inflammation.
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Affiliation(s)
- Hilal Ozturk
- Faculty of Medicine, Department of Biophysics, Karadeniz Technical Unicersity, Trabzon, Turkey.,Faculty of Medicine, Department of Biophysics, Istanbul University/Cerrahpaşa, İstanbul, Turkey
| | - Devrim Saribal
- Faculty of Medicine, Department of Biophysics, Istanbul University/Cerrahpaşa, İstanbul, Turkey
| | - Yusuf Metin Gelmez
- Faculty of Medicine, Department of Immunology, Istanbul University, İstanbul, Turkey
| | - Gunnur Deniz
- Faculty of Medicine, Department of Immunology, Istanbul University, İstanbul, Turkey
| | - Abdullah Yilmaz
- Faculty of Medicine, Department of Immunology, Istanbul University, İstanbul, Turkey
| | - Asli Kirectepe
- Faculty of Medicine, Department of Medical Biology, Nisantasi University, İstanbul, Turkey
| | - Alev Meltem Ercan
- Faculty of Medicine, Department of Biophysics, Istanbul University/Cerrahpaşa, İstanbul, Turkey
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6
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Piszczek P, Wójcik-Piotrowicz K, Gil K, Kaszuba-Zwoińska J. Immunity and electromagnetic fields. ENVIRONMENTAL RESEARCH 2021; 200:111505. [PMID: 34126050 DOI: 10.1016/j.envres.2021.111505] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/23/2021] [Accepted: 06/07/2021] [Indexed: 06/12/2023]
Abstract
Despite many studies, the question about the positive or negative influence of electromagnetic fields (EMF) on living organisms still remains an unresolved issue. To date, the results are inconsistent and hardly comparable between different laboratories. The observed bio-effects are dependent not only on the applied EMF itself, but on many other factors such as the model system tested or environmental ones. In an organism, the role of the defense system against external stressors is played by the immune system consisting of various cell types. The immune cells are engaged in many physiological processes and responsible for the proper functioning of the whole organism. Any factor with an ability to cause immunomodulatory effects may weaken or enhance the response of the immune system. This review is focused on a wide range electromagnetic fields as a possible external factor which may modulate the innate and/or adaptive immunity. Considering the existing databases, we have compiled the bio-effects evoked by EMF in particular immune cell types involved in different types of immune response with the common mechanistic models and mostly activated intracellular signaling cascade pathways.
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Affiliation(s)
- Piotr Piszczek
- Department of Pathophysiology, Faculty of Medicine, Jagiellonian University Medical College, 31-121, Krakow, Czysta street 18, Poland.
| | - Karolina Wójcik-Piotrowicz
- Department of Biophysics, Jagiellonian University Medical College, Łazarza street 16, 31-530, Cracow, Poland
| | - Krzysztof Gil
- Department of Pathophysiology, Faculty of Medicine, Jagiellonian University Medical College, 31-121, Krakow, Czysta street 18, Poland
| | - Jolanta Kaszuba-Zwoińska
- Department of Pathophysiology, Faculty of Medicine, Jagiellonian University Medical College, 31-121, Krakow, Czysta street 18, Poland
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7
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Wu J, Ning P, Gao R, Feng Q, Shen Y, Zhang Y, Li Y, Xu C, Qin Y, Plaza GR, Bai Q, Fan X, Li Z, Han Y, Lesniak MS, Fan H, Cheng Y. Programmable ROS-Mediated Cancer Therapy via Magneto-Inductions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1902933. [PMID: 32596106 PMCID: PMC7312334 DOI: 10.1002/advs.201902933] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/06/2020] [Indexed: 05/05/2023]
Abstract
Reactive oxygen species (ROS), a group of oxygen derived radicals and derivatives, can induce cancer cell death via elevated oxidative stress. A spatiotemporal approach with safe and deep-tissue penetration capabilities to elevate the intracellular ROS level is highly desirable for precise cancer treatment. Here, a mechanical-thermal induction therapy (MTIT) strategy is developed for a programmable increase of ROS levels in cancer cells via assembly of magnetic nanocubes integrated with alternating magnetic fields. The magneto-based mechanical and thermal stimuli can disrupt the lysosomes, which sequentially induce the dysfunction of mitochondria. Importantly, intracellular ROS concentrations are responsive to the magneto-triggers and play a key role for synergistic cancer treatment. In vivo experiments reveal the effectiveness of MTIT for efficient eradication of glioma and breast cancer. By remote control of the force and heat using magnetic nanocubes, MTIT is a promising physical approach to trigger the biochemical responses for precise cancer treatment.
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Affiliation(s)
- Jiaojiao Wu
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
- Collaborative Innovation Center for Brain ScienceTongji UniversityShanghai200092China
| | - Peng Ning
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Rui Gao
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Qishuai Feng
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Yajing Shen
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Yifan Zhang
- College of Chemistry and Materials ScienceNorthwest UniversityXi'an710127China
| | - Yingze Li
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Chang Xu
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Yao Qin
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Gustavo R. Plaza
- Center for Biomedical TechnologyUniversidad Politécnica de MadridPozuelo de Alarcón28223Spain
| | - Qianwen Bai
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Xing Fan
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Zhenguang Li
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
| | - Yu Han
- Feinberg School of MedicineNorthwestern University676 North Saint Clair Street, Suite 2210ChicagoIL60611USA
| | - Maciej S. Lesniak
- Feinberg School of MedicineNorthwestern University676 North Saint Clair Street, Suite 2210ChicagoIL60611USA
| | - Haiming Fan
- College of Chemistry and Materials ScienceNorthwest UniversityXi'an710127China
| | - Yu Cheng
- Institute for Regenerative Medicine, Institute for Translational Nanomedicine, Shanghai East HospitalTongji University School of Medicine1800 Yuntai RoadShanghai200123China
- Collaborative Innovation Center for Brain ScienceTongji UniversityShanghai200092China
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8
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Magnetic Fields and Reactive Oxygen Species. Int J Mol Sci 2017; 18:ijms18102175. [PMID: 29057846 PMCID: PMC5666856 DOI: 10.3390/ijms18102175] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/30/2017] [Accepted: 10/13/2017] [Indexed: 12/21/2022] Open
Abstract
Reactive oxygen species (ROS) ubiquitously exist in mammalian cells to participate in various cellular signaling pathways. The intracellular ROS levels are dependent on the dynamic balance between ROS generation and elimination. In this review, we summarize reported studies about the influences of magnetic fields (MFs) on ROS levels. Although in most cases, MFs increased ROS levels in human, mouse, rat cells, and tissues, there are also studies showing that ROS levels were decreased or not affected by MFs. Multiple factors could cause these discrepancies, including but not limited to MF type/intensity/frequency, exposure time and assay time-point, as well as different biological samples examined. It will be necessary to investigate the influences of different MFs on ROS in various biological samples systematically and mechanistically, which will be helpful for people to get a more complete understanding about MF-induced biological effects. In addition, reviewing the roles of MFs in ROS modulation may open up new scenarios of MF application, which could be further and more widely adopted into clinical applications, particularly in diseases that ROS have documented pathophysiological roles.
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9
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Low Frequency Magnetic Fields Induce Autophagy-associated Cell Death in Lung Cancer through miR-486-mediated Inhibition of Akt/mTOR Signaling Pathway. Sci Rep 2017; 7:11776. [PMID: 28924214 PMCID: PMC5603574 DOI: 10.1038/s41598-017-10407-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 08/04/2017] [Indexed: 12/19/2022] Open
Abstract
Low frequency magnetic fields (LF-MFs) can affect cell proliferation in a cell-type and intensity-dependent way. Previous study has reported the anti-tumor effect of LF-MFs in lung cancers. Our previous study also optimized the intensity and duration of LF-MFs to effectively inhibit the proliferation of lung cancer cells. However, the anti-tumor mechanism of LF-MFs remains unclear, which limit the clinical application of LF-MFs in anti-tumor therapy. Here, in a well-established Lewis Lung Cancer (LLC) mouse model, we found that LF-MFs inhibit tumor growth and induce an autophagic cell death in lung cancer. We also found that LF-MFs could up-regulate the expression level of miR-486, which was involved in LF-MFs activated cell autophagy. Furthermore, we found B-cell adaptor for phosphatidylinositol 3-kinase (BCAP) is a direct target of miR-486. miR-486 inhibit AKT/mTOR signaling through inhibiting expression of BCAP. Moreover, a decreased expression of miR-486 and an increased expression of BCAP were found in tumor tissues of lung cancer patients. Taken together, this study proved that LF-MFs can inhibit lung cancers through miR-486 induced autophagic cell death, which suggest a clinical application of LF-MFs in cancer treatment.
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10
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Nakamura K, Peng Y, Utsumi F, Tanaka H, Mizuno M, Toyokuni S, Hori M, Kikkawa F, Kajiyama H. Novel Intraperitoneal Treatment With Non-Thermal Plasma-Activated Medium Inhibits Metastatic Potential of Ovarian Cancer Cells. Sci Rep 2017; 7:6085. [PMID: 28729634 PMCID: PMC5519696 DOI: 10.1038/s41598-017-05620-6] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 05/31/2017] [Indexed: 12/20/2022] Open
Abstract
Non-thermal atmospheric pressure plasma has been proposed as a new therapeutic tool for cancer treatment. Recently, plasma-activated medium (PAM) has been widely studied in various cancer types. However, there are only few reports demonstrating the anti-tumour effects of PAM in an animal model reflecting pathological conditions and the accompanying mechanism. Here we investigated the inhibitory effect of PAM on the metastasis of ovarian cancer ES2 cells in vitro and in vivo. We demonstrated that ES2 cell migration, invasion and adhesion were suppressed by PAM at a certain PAM dilution ratio, whereas cell viability remained unaffected. In an in vivo mouse model of intraperitoneal metastasis, PAM inhibited peritoneal dissemination of ES2 cells, resulting in prolonged survival. Moreover, we assessed the molecular mechanism and found that MMP-9 was decreased by PAM. On further investigation, we also found that PAM prevented the activation of the MAPK pathway by inhibiting the phosphorylation of JNK1/2 and p38 MAPK. These findings indicate that PAM inhibits the metastasis of ovarian cancer cells through reduction of MMP-9 secretion, which is critical for cancer cell motility. Our findings suggest that PAM intraperitoneal therapy may be a promising treatment option for ovarian cancer.
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Affiliation(s)
- Kae Nakamura
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan
| | - Yang Peng
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan
| | - Fumi Utsumi
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan
| | - Hiromasa Tanaka
- Institute of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.,Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan
| | - Masaaki Mizuno
- Center for Advanced Medicine and Clinical Research, Nagoya University Hospital, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan
| | - Shinya Toyokuni
- Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan
| | - Masaru Hori
- Institute of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Fumitaka Kikkawa
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan
| | - Hiroaki Kajiyama
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Tsurumai-cho 65, Showa-ku, Nagoya, 466-8550, Japan.
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11
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LF-MF inhibits iron metabolism and suppresses lung cancer through activation of P53-miR-34a-E2F1/E2F3 pathway. Sci Rep 2017; 7:749. [PMID: 28389657 PMCID: PMC5429732 DOI: 10.1038/s41598-017-00913-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/16/2017] [Indexed: 12/15/2022] Open
Abstract
Our previous studies showed that low frequency magnetic fields (LF-MF) suppressed tumor growth and influenced the function of immune system. Nevertheless the mechanisms behind the effect of LF-MF still remain to be elucidated. In this study, Tumor- bearing mice subcutaneously inoculated with Lewis lung cancer cells were exposed to a LF-MF (0.4T, 7.5 Hz) for 35 days and Survival rate, tumor growth and the tumor markers were measured. Results showed that tumor growth was obviously inhibited with a prolonged survival of tumor- bearing mice by LF-MF exposure. In vitro experiments, LF-MF was found to induce cell growth arrest, cell senescence and inhibit iron metabolism of lung cancer cells. Moreover, LF-MF stabilized p53 protein via inhibiting cell iron metabolism and the stabilized p53 protein enhanced miR-34a transcription. Furthermore, increased expression of miR-34a induced cell proliferation inhibition, cell cycle arrest and cell senescence of lung cancer cells by targeting E2F1/E2F3. We also detected the relevant indicator in tumor tissue such as the iron content, the level of miR-34a and related protein, corresponding results were obtained. Taken together, these observations imply that LF-MF suppressed lung cancer via inhibiting cell iron metabolism, stabilizing p53 protein and activation P53- miR-34a-E2F1/E2F3 pathway.
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12
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Zeng Y, Shen Y, Hong L, Chen Y, Shi X, Zeng Q, Yu P. Effects of Single and Repeated Exposure to a 50-Hz 2-mT Electromagnetic Field on Primary Cultured Hippocampal Neurons. Neurosci Bull 2017; 33:299-306. [PMID: 28265899 DOI: 10.1007/s12264-017-0113-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Accepted: 01/10/2017] [Indexed: 11/29/2022] Open
Abstract
The prevalence of domestic and industrial electrical appliances has raised concerns about the health risk of extremely low-frequency magnetic fields (ELF-MFs). At present, the effects of ELF-MFs on the central nervous system are still highly controversial, and few studies have investigated its effects on cultured neurons. Here, we evaluated the biological effects of different patterns of ELF-MF exposure on primary cultured hippocampal neurons in terms of viability, apoptosis, genomic instability, and oxidative stress. The results showed that repeated exposure to 50-Hz 2-mT ELF-MF for 8 h per day after different times in culture decreased the viability and increased the production of intracellular reactive oxidative species in hippocampal neurons. The mechanism was potentially related to the up-regulation of Nox2 expression. Moreover, none of the repeated exposure patterns had significant effects on DNA damage, apoptosis, or autophagy, which suggested that ELF-MF exposure has no severe biological consequences in cultured hippocampal neurons.
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Affiliation(s)
- Ying Zeng
- Bioelectromagnetics Laboratory, Department of Occupational and Environmental Health, School of Public Health, Zhejiang University, Hangzhou, 310058, China
| | - Yunyun Shen
- Bioelectromagnetics Laboratory, Department of Occupational and Environmental Health, School of Public Health, Zhejiang University, Hangzhou, 310058, China.,Institute of Cognitive Neuroscience and Department of Psychology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Ling Hong
- Bioelectromagnetics Laboratory, Department of Occupational and Environmental Health, School of Public Health, Zhejiang University, Hangzhou, 310058, China
| | - Yanfeng Chen
- Bioelectromagnetics Laboratory, Department of Occupational and Environmental Health, School of Public Health, Zhejiang University, Hangzhou, 310058, China
| | - Xiaofang Shi
- Department of Neurobiology, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Qunli Zeng
- Bioelectromagnetics Laboratory, Department of Occupational and Environmental Health, School of Public Health, Zhejiang University, Hangzhou, 310058, China.
| | - Peilin Yu
- Department of Toxicology, School of Public Health, Zhejiang University, Hangzhou, 310058, China.
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