Effect of Electric Field in Conditioned Aversion Response

Harakawa, Shinji; Nedachi, Takaki; Hori, Takamitsu; Takahashi, Kimiko; Tochio, Koji; Inoue, Noboru

doi:10.1292/jvms.70.611

Cited by 9 publications

(9 citation statements)

References 14 publications

(12 reference statements)

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“…Our previous report suggests suppressive effects of 50 Hz EF on place avoidance response [8], and that the exposure of C57BL/6 J male mice to EF improves their subfertility activity in mating with superovulated females [9]. In addition, our results also indicated that EF depressed plasma adrenocorticotropic hormone levels due to an immobilization [10].…”

Section: Introductionsupporting

confidence: 71%

“…The EF exposure system was composed of 3 major parts, namely, a high voltage transformer unit (Healthtron; maximum output voltage: 9 kV; Hakuju, Japan), a constant voltage unit (Tokyo Seiden, Japan), and EF exposure cages [8-10,12,13]. The reason of usage a constant voltage unit is to avoid unexpected influences by electrical noises originated of commercial power supply (Tokyo Seiden, Japan).…”

Section: Methodsmentioning

confidence: 99%

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Effect of 50 Hz electric field in diacylglycerol acyltransferase mRNA expression level and plasma concentration of triacylglycerol, free fatty acid, phospholipid and total cholesterol

Hori¹,

Harakawa²,

Herbas

et al. 2012

Lipids Health Dis

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BackgroundThe effects of exposure to a 50 Hz electric field (EF) on plasma level of triacylglycerol, free fatty acids, total cholesterol and phospholipid and mRNA expression level of diacylglycerol acyltransferase (DGAT) 1 and 2 in liver and intestines from C57BL/6 J mice were studied.MethodsThe test was based on comparison between mice post treated with 50 Hz EF of 45 kV/m intensity for 30 min per day for 11 days or without EF. DGATs mRNA expression was analyzed by real-time quantitative polymerase chain reaction.ResultsThere was no difference in the gene expression level of DGAT1 in liver and intestines. The DGAT2 gene expression level in liver derived from mice treated with EF was significantly lower than those in the control (P < 0.001). Both plasma total cholesterol (P < 0.01) and phospholipid (P < 0.05) in the group exposed to EF were lower than those in the control, but there was no difference in triacylglycerol or free fatty acid levels.ConclusionExposure to 50 Hz EF decrease the plasma levels of total cholesterol and phospholipids, and downregulated DGAT2 mRNA expression in liver. The mechanisms for the effects of EF on lipid metabolism are not well understand yet, but altered DGAT2 activity may be involved.

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Section: Introductionsupporting

confidence: 71%

Section: Methodsmentioning

confidence: 99%

Effect of 50 Hz electric field in diacylglycerol acyltransferase mRNA expression level and plasma concentration of triacylglycerol, free fatty acid, phospholipid and total cholesterol

Hori¹,

Harakawa²,

Herbas

et al. 2012

Lipids Health Dis

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“…The EF exposure system comprised three major parts as described by Harakawa et al [2005Harakawa et al [ , 2008 and Hori et al [2012]: a high-voltage transformer unit (A30; maximum output voltage, 30 kV; Hakuju, Tokyo, Japan), a constant-voltage unit (CVFT1-200H; Tokyo Seiden, Tokyo, Japan) to avoid unexpected interference from electrical noise originating from the commercial power supply, and EF exposure cages (Hakuju). Exposure cages comprised a cylindrical plastic cage (diameter, 200 mm; height, 100 mm).…”

Section: Ef Exposure Systemmentioning

confidence: 99%

Exposure to 50 Hz electric fields reduces stress‐induced glucocorticoid levels in BALB/c mice in a kV/m‐ and duration‐dependent manner

Hori

Inoue

Suzuki

et al. 2015

Bioelectromagnetics

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Electric fields (EFs) can reduce elevated levels of stress-related hormones in some organisms. In this study, endocrine effects of exposure to a 50 Hz EF were investigated in male BALB/c mice. Specifically, plasma glucocorticoid (GC) levels were examined because GC is known to mediate the stress response in mice, including changes induced by immobilization. Mice were exposed to 50 Hz EFs (at 2.5-200 kV/m) for 60 min. They were immobilized for the latter half (30 min). At the end of exposure period, blood samples were collected and GC levels estimated by spectrofluorometry. GC levels were not influenced by EFs in absence of immobilization, but they were significantly higher in immobilized mice than in non-immobilized mice (P < 0.01). Elevated GC levels induced by immobilization were significantly reduced by exposure to an EF at 10 kV/m (P < 0.05), and the effect of EFs at 0-10 kV/m on GC levels increased in a kV/m-dependent manner (P < 0.05). In contrast, following treatment with EFs at 50 and 200 kV/m, GC levels were higher than those observed at 10 kV/m. To assess the effect of EF treatment duration, mice were also exposed to 50 Hz EFs (10 kV/m) for 6, 20, or 60 min. Immobilization-induced increase in GC levels was significantly suppressed by EF exposure for 20 and 60 min. Therefore, our results demonstrate that extremely low-frequency EFs alter stress response of mice in a kV/m- and duration-dependent manner.

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“…Since the occurrence of all the diseases depends on the intensity of exposure to an electromagnetic field, the list can be further expanded includeing the following: a gastric ulcer, asthma, pineal gland disruption, intestinal diseases [16,17].…”

Section: Electric and Magnetic Fields Distributionsmentioning

confidence: 99%

“…Sexual function. Continuous exposure of the body to EMF leads to reduced activity of pituitary gland, birth abnormalities [16,17].…”

Section: Electric and Magnetic Fields Distributionsmentioning

confidence: 99%

Electric and magnetic field of different transpositions of overhead power line

Deltuva

Lukočius

2017

Archives of Electrical Engineering

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In Lithuanian and Polish electric power supply systems, the power transmission lines of 400 kV voltage represent one of the most potential sources of electric and magnetic fields generation. The 400 kV double-circuit overhead power transmission line and its surrounding environment were herby described and simulated through Finite Element Method using COMSOL Multiphysic software package. This study includes magnetic and electric field calculations. The study shows that the values of magnetic field strength and electric field strength present in the vicinity of a 400 kV overhead power transmission line tend to exceed limit values established in the Normative. Measurements are suggested to be taken for the purpose of finding maximum values of magnetic and electric field strength. To reduce these values, it is recommended to increase the height of supports, and restrict human personal and economic activities.

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Effect of Electric Field in Conditioned Aversion Response

Cited by 9 publications

References 14 publications

Effect of 50 Hz electric field in diacylglycerol acyltransferase mRNA expression level and plasma concentration of triacylglycerol, free fatty acid, phospholipid and total cholesterol

Effect of 50 Hz electric field in diacylglycerol acyltransferase mRNA expression level and plasma concentration of triacylglycerol, free fatty acid, phospholipid and total cholesterol

Exposure to 50 Hz electric fields reduces stress‐induced glucocorticoid levels in BALB/c mice in a kV/m‐ and duration‐dependent manner

Electric and magnetic field of different transpositions of overhead power line

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