Circadian activity rhythm influenced by near zero magnetic field

Bliss, Virginia L.; Heppner, Frank

doi:10.1038/261411a0

Cited by 93 publications

(34 citation statements)

References 13 publications

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“…Exposure to the HMF has been shown to have adverse effects on embryonic development and brain function [35]. HMF exposure has also been shown to lead to increased occurrences of developmental abnormalities in the newt and Xenopus laevis [6,7], alteration of the vocal behavior [8] and circadian rhythm of birds [9] and rats [10], dysfunction in the learning and memory of Drosophila and chicks [1113], and a reduction in stress-induced analgesia in mice [1416]. There are reports indicating that even short-term HMF exposure can increase the number of errors and the task processing time of human subjects during learning [17].…”

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confidence: 99%

Transcriptome profile of human neuroblastoma cells in the hypomagnetic field

Liu

Bartlett

et al. 2014

Sci. China Life Sci.

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Research has shown that the hypomagnetic field (HMF) can affect embryo development, cell proliferation, learning and memory, and in vitro tubulin assembly. In the present study, we aimed to elucidate the molecular mechanism by which the HMF exerts its effect, by comparing the transcriptome profiles of human neuroblastoma cells exposed to either the HMF or the geomagnetic field. A total of 2464 differentially expressed genes (DEGs) were identified, 216 of which were up-regulated and 2248 of which were down-regulated after exposure to the HMF. These DEGs were found to be significantly clustered into several key processes, namely macromolecule localization, protein transport, RNA processing, and brain function. Seventeen DEGs were verified by real-time quantitative PCR, and the expression levels of nine of these DEGs were measured every 6 h. Most notably, MAPK1 and CRY2, showed significant up-and down-regulation, respectively, during the first 6 h of HMF exposure, which suggests involvement of the MAPK pathway and cryptochrome in the early bio-HMF response. Our results provide insights into the molecular mechanisms underlying the observed biological effects of the HMF. hypomagnetic field, geomagnetic field, transcriptome profile, massively parallel sequencing, MAPK1, CRY2 Citation:Mo WC, Liu Y, Bartlett PF, He RQ. Transcriptome profile of human neuroblastoma cells in the hypomagnetic field.

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confidence: 99%

Transcriptome profile of human neuroblastoma cells in the hypomagnetic field

Liu

Bartlett

et al. 2014

Sci. China Life Sci.

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“…The results showed that there was an improvement in ADL activities more than ROM in lumbar region. These results were supported by [44] when they examined the beneficial effects of EMS 0.4 Hz on 5 idiopathic male Parkinsonian patients. The main problems of patients were short stride length and lack of reciprocal arm motion during walking.…”

Section: Discussionmentioning

confidence: 73%

“…Recent studies on Parkinsonian patients suggested that the dopaminergic neurons were in a state of oxidative stress as evidenced by increased cellular iron accumulation, decreased glutathione levels and damage of neurons molecules including lipids, protein and deoxyneuclic acid (DNA) [44]. This oxidative stress was believed to facilitate the degeneration of striate dopamine neurons in Parkinson's disease and limited their ability to synthesis, store and release of dopamine.…”

Section: Discussionmentioning

confidence: 99%

Future of Treatment of Temporomandibular Joint Dysfunctions in Parkinsonian Patients

Nofal¹,

Altaweel²,

Seada³

2014

OJST

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The purpose of the study was designed to clarify the modern trends of physical therapy in treatment of temporomandibular joint dysfunctions in Parkinsonian patients, which in this respect included the degree of pain, the muscles power of both masseter and pterygoid, the range of TMJ motion, the angle of mouth opening and their effects on electromyography study in both sexes. Subjects: Thirty males and females were the same degree of disabilities according to modified Hoehn and Yahr scales (grade 3) of Parkinsonian patients, and their age ranged from 50 -77 years old and their weight ranged from 60 -88 kg. They were randomly divided into two equal groups (G1 and G2). G1 (control) consisted of 15 patients of both sexes and was treated by exercises therapy program and G2 (experimental) consisted of 15 Parkinsonian patients of both sexes and was treated by the same exercises therapy program and low level pulsed electromagnetic therapy. Vital signs such as blood pressure, body temperature, pulse rate and respiratory rate were measured before and after the treatment sessions. Assessments: Visual analogue scale was used to measure degree of pain. Tensiometer was used to measure the muscle power of masseter and pterygoid, the digital goniometer was used to investigate the range of TMJ movement. Moreover, standard electromyography test (EMG) was used to measure the compound muscle action potentials. Statistically the results for all groups were analyzed by t-test to compare the differences between the two groups. The statistical package of social sciences (SPSS, version 10) was used for data processing using the P-value 0.05 as a level of significance. Results showed that there were significant improvements in all variables in G2 only. However, there was a little improvement but not significant in both G1. Therefore, it could be concluded that the use of low level pulsed electromagnetic therapy combined with exercises program was the good method to control pain of TMJ, increase of muscle power and the range of their movements together with determination of electromyography. Our results opened a new link to manage the TMJ dysfunctions in Parkinsonian patients via the use of low level pulsed electromagnetic therapy combined with exercises program. * Corresponding author. R. A. Nofal et al.209

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“…Even Eskimos are reported not to show the regular 24-hour periodicity of urine production and potassium excretion (Lobban 1967) and in European volunteers of Svalbard (Spitzbergen) synchronization of the circadian system did not take place supposedly because of the weakness of the Zeitgeber (Johnson et al 1979). On the evidence of these publications neither the sun nor cyclic fluctuations in the vertical component intensity of the earth's magnetic field, as suggested by Bliss and Heppner (1976) must have been strong or clear enough clues to set up and maintain circadian rhythms.…”

Section: Discussionmentioning

confidence: 95%

Rhythmicity of chromophore turnover of visual pigment in the Antarctic amphipod Orchomene plebs (Crustacea; Amphipoda)

1993

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Abstract. 1. Relative retinal amounts in the compound eye of the Antarctic amphipod Orchomene plebs were assessed during conditions of continuous summer daylight every 3 h over a period of 48 h. The habitat of the experimental animal is the bottom of the Ross Sea (78~ 166~ down to depths of at least 400 m; water temperature is a constant -1.8 ~ C. A periodicity of 12 h was detected with relative amounts of 11-cis retinal exhibiting peaks at midday and at midnight and troughs at 7.00 h and 19.00 h.2. The result that 90% of retinoid were insoluble in n-hexane suggests that at least 90% of the measured retinoid were attached to membrane-bound proteins such as opsin.3. Selective light adaptation showed that the visual pigments were thermostable and photoregenerable. The main absorbance peak of rhodopsin, compared with metarhodopsin, seems to be in the longer wavelengths.

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Circadian activity rhythm influenced by near zero magnetic field

Cited by 93 publications

References 13 publications

Transcriptome profile of human neuroblastoma cells in the hypomagnetic field

Transcriptome profile of human neuroblastoma cells in the hypomagnetic field

Future of Treatment of Temporomandibular Joint Dysfunctions in Parkinsonian Patients

Rhythmicity of chromophore turnover of visual pigment in the Antarctic amphipod Orchomene plebs (Crustacea; Amphipoda)

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