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Kim, D.W.; Choi, J.L.; Nam, K.C.; Yang, D.I.; Kwon, M.K. |
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Title |
Origins of electromagnetic hypersensitivity to 60 Hz magnetic fields: A provocation study |
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Journal Article |
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Year |
2011 |
Publication |
Bioelectromagnetics |
Abbreviated Journal |
Bioelectromagnetics |
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With increasing electrical device usage, social concerns about the possible effects of 60 Hz electromagnetic fields on human health have increased. The number of people with self-attributed electromagnetic hypersensitivity (EHS) who complain of various subjective symptoms such as headache and insomnia has also increased. However, it is unclear whether EHS results from physiological or other origins. In this double-blinded study, we simultaneously investigated physiological changes (heart rate, respiration rate, and heart rate variability), subjective symptoms, and perception of the magnetic field to assess origins of the subjective symptoms. Two volunteer groups of 15 self-reported EHS and 16 non-EHS individuals were tested with exposure to sham and real (60 Hz, 12.5 microT) magnetic fields for 30 min. Magnetic field exposure did not have any effects on physiological parameters or eight subjective symptoms in either group. There was also no evidence that the EHS group perceived the magnetic field better than the non-EHS group. In conclusion, the subjective symptoms did not result from the 60 Hz, 12.5 microT magnetic field exposures but from other non-physiological factors. Bioelectromagnetics. (c) 2011 Wiley Periodicals, Inc. |
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Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea; Graduate Program in Biomedical Engineering, Yonsei University, Seoul, Korea; Brain Korea 21 Project for Medical Science, Yonsei University, Seoul, Korea. kdw@yuhs.ac |
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0197-8462 |
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PMID:22012875 |
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CBM.UAM @ ccobaleda @ |
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498 |
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Laudisi, F.; Sambucci, M.; Nasta, F.; Pinto, R.; Lodato, R.; Altavista, P.; Lovisolo, G.A.; Marino, C.; Pioli, C. |
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Title |
Prenatal exposure to radiofrequencies: effects of WiFi signals on thymocyte development and peripheral T cell compartment in an animal model |
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Journal Article |
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Year |
2012 |
Publication |
Bioelectromagnetics |
Abbreviated Journal |
Bioelectromagnetics |
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33 |
Issue |
8 |
Pages |
652-661 |
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Keywords |
Animals; Cell Differentiation/radiation effects; Cell Proliferation/radiation effects; Cytokines/biosynthesis; Female; Fetus/*immunology/*radiation effects; Male; Mice; Mice, Inbred C57BL; Models, Animal; Pregnancy; Radio Waves/*adverse effects; Thymocytes/*cytology/immunology/metabolism/*radiation effects; Thymus Gland/cytology/radiation effects; *Wireless Technology |
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Abstract |
Wireless local area networks are an increasing alternative to wired data networks in workplaces, homes, and public areas. Concerns about possible health effects of this type of signal, especially when exposure occurs early in life, have been raised. We examined the effects of prenatal (in utero) exposure to wireless fidelity (WiFi) signal-associated electromagnetic fields (2450 MHz center-frequency band) on T cell development and function. Pregnant mice were exposed whole body to a specific absorption rate of 4 W/kg, 2 h per day, starting 5 days after mating and ending 1 day before the expected delivery. Sham-exposed and cage control groups were used as controls. No effects on cell count, phenotype, and proliferation of thymocytes were observed. Also, spleen cell count, CD4/CD8 cell frequencies, T cell proliferation, and cytokine production were not affected by the exposure. These findings were consistently observed in the male and female offspring at early (5 weeks of age) and late (26 weeks of age) time points. Nevertheless, the expected differences associated with aging and/or gender were confirmed. In conclusion, our results do not support the hypothesis that the exposure to WiFi signals during prenatal life results in detrimental effects on the immune T cell compartment. |
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ENEA (Italian Agency for New Technologies, Energy and Sustainable Economic Development), Unit of Radiation Biology and Human Health, Rome, Italy |
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0197-8462 |
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PMID:22556007 |
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CBM.UAM @ ccobaleda @ |
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507 |
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Chen, G.; Upham, B.L.; Sun, W.; Chang, C.C.; Rothwell, E.J.; Chen, K.M.; Yamasaki, H.; Trosko, J.E. |
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Title |
Effect of electromagnetic field exposure on chemically induced differentiation of friend erythroleukemia cells |
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Journal Article |
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Year |
2000 |
Publication |
Environmental health perspectives |
Abbreviated Journal |
Environ Health Perspect |
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108 |
Issue |
10 |
Pages |
967-972 |
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Cell Differentiation/*physiology; Cell Division; *Cell Transformation, Neoplastic; Electromagnetic Fields/*adverse effects; *Friend murine leukemia virus; Humans; Leukemia, Erythroblastic, Acute/*pathology; Telomerase/metabolism; Tumor Cells, Cultured |
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Abstract |
Whether exposure of humans to extremely low frequency electromagnetic fields (ELF-EMF) can cause cancer is controversial and therefore needs further research. We used a Friend erythroleukemia cell line that can be chemically induced to differentiate to determine whether ELF-EMF could alter proliferation and differentiation in these cells in a manner similar to that of a chemical tumor promoter. Exposure of this cell line to 60 Hz ELF-EMF resulted in a dose dependent inhibition of differentiation, with maximal inhibition peaking at 40% and 40 mG (4 microT). ELF-EMF at 10 mG (1.0 microT) and 25 mG (2.5 microT) inhibited differentiation at 0 and 20%, respectively. ELF-EMF at 1.0 (100) and 10.0 G (1,000 microT) stimulated cell proliferation 50% above the sham-treated cells. The activity of telomerase, a marker of undifferentiated cells, decreased 100[times] when the cells were induced to differentiate under sham conditions, but when the cells were exposed to 0.5 G (50 microT) there was only a 10[times] decrease. In summary, ELF-EMF can partially block the differentiation of Friend erythroleukemia cells, and this results in a larger population of cells remaining in the undifferentiated, proliferative state, which is similar to the published results of Friend erythroleukemia cells treated with chemical-tumor promoters. |
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0091-6765 |
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WP5 In vitro |
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PMID: 11049817 |
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UNIBAS @ david.schuermann @ Chen2000 |
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72 |
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Hisamitsu, T.; Narita, K.; Kasahara, T.; Seto, A.; Yu, Y.; Asano, K. |
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Title |
Induction of apoptosis in human leukemic cells by magnetic fields |
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Journal Article |
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Year |
1997 |
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The Japanese Journal of Physiology |
Abbreviated Journal |
Jpn J Physiol |
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47 |
Issue |
3 |
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307-310 |
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*Apoptosis; Blood Cells/physiology; DNA Fragmentation; DNA, Neoplasm/genetics; *Electromagnetic Fields; Electrophoresis, Agar Gel; HL-60 Cells; Humans; Leukemia, Myeloid/genetics/*pathology; Leukocytes/physiology; Neutrophils/physiology; Tumor Cells, Cultured |
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When human myelogenous leukemic cell lines, HL-60 and ML-1, were exposed to 50 Hz electromagnetic fields (EMFs), nucleosome-sized DNA fragmentation (a biochemical marker of apoptosis) was induced as assessed by agarose gel electrophoresis. However, EMFs could not induce detectable DNA fragmentation in either human peripheral blood leukocytes or polymorphonuclear cells. The minimum exposure period required for the onset of DNA fragmentation in leukemic cells was 1.0 h. Although adverse effects of EMFs on human health have been reported, the apoptosis-inducing action of EMFs on leukemic cells may suggest a possible medical application. |
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Department of Physiology, School of Medicine, Showa University, Tokyo, Japan. tadashi@med.showa-u.ac.jp |
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0021-521X |
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PMID:9271162 |
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IT'IS @ evaj @ |
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317 |
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Gluck, B.; Guntzschel, V.; Berg, H. |
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Title |
Inhibition of proliferation of human lymphoma cells U937 by a 50 Hz electromagnetic field |
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Journal Article |
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Year |
2001 |
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Cellular and Molecular Biology (Noisy-le-Grand, France) |
Abbreviated Journal |
Cell Mol Biol (Noisy-le-Grand) |
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47 Online Pub |
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Ol115-7 |
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Apoptosis; *Cell Division; *Electromagnetic Fields; Humans; Time Factors; U937 Cells |
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Weak pulsating electromagnetically induced fields (PEMF) by Helmholtz coils changes cell metabolism, if cells are treated with a certain range of frequency and amplitude. The influence on proliferation of human histiocytic lymphoma cells U937 has been studied applying a sinusoidal 50 Hz field with amplitudes of the flux density B = 0.3 to 4.7 mT for 4 days. No difference between experiment and control was found in the region 0.3 and 2 mT. However, stronger fields (> or =2.5 mT) inhibit cell division. Fields > or =3.5 mT treatment kill > or =80% of the cell number at the beginning (1.5 x 10(5)/ml). This effect may be an electromagnetocally induced cell death as the first step for a non-invasive application on cell proliferation process. |
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Laboratory Cell Culture, Institute of Virology, Friedrich-Schiller-University Jena, Germany. i6glbr@rz.uni-jena.de |
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0145-5680 |
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PMID:11936855 |
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IT'IS @ evaj @ |
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309 |
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