Melatonin and puberty in female lambs exposed to EMF: A replicate study

Lee, J. M.; Stormshak, F.; Thompson, J. M.; Hess, David L.; Foster, Douglas L.

doi:10.1002/bem.2250160208

Cited by 28 publications

(9 citation statements)

References 13 publications

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“…Decreased melatonin levels have also been previously reported both in experimental animals as well as in humans post EMF exposure however under differing exposure paradigms (Burch et al, 1999;Pfluger & Minder, 1996;Reiter et al, 1998;Rogers et al, 1995b;Selmaoui and Touitou, 1995). At the same time, our results are in contradiction to the investigations reporting rise in melatonin (Dyche et al, 2012;Kumlin et al, 2005) as well as the studies observing no change (Cocco et al, 2005;Graham et al, 2001;Lee et al, 1995). The latter effect however, has been found in exposure group I (registering minor but not significant difference in melatonin level), which is consistent with the previous findings as well.…”

Section: Discussioncontrasting

confidence: 85%

Effect of occupational EMF exposure from radar at two different frequency bands on plasma melatonin and serotonin levels

Singh

Mani

Kapoor

2015

International Journal of Radiation Biology

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Section: Discussioncontrasting

confidence: 85%

Effect of occupational EMF exposure from radar at two different frequency bands on plasma melatonin and serotonin levels

Singh

Mani

Kapoor

2015

International Journal of Radiation Biology

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“…Previous ruminant studies have not observed an effect of EMF exposure on MLT levels. In two different studies, EMF did not decrease MLT in lambs [Lee et al, 1993[Lee et al, , 1995. One previous study in cattle did not find an effect of EMF on nocturnal MLT concentrations; but in this study, diurnal concentrations of the hormone were not measured [Burchard et al, 1998].…”

Section: Melatoninmentioning

confidence: 53%

Blood melatonin and prolactin concentrations in dairy cows exposed to 60 Hz electric and magnetic fields during 8 h photoperiods

Rodríguez

Petitclerc

Burchard

et al. 2004

Bioelectromagnetics

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Two experiments were conducted to test the hypothesis that electric and magnetic field (EMF) exposure may result in endocrine responses similar to those observed in animals exposed to long days. In the first experiment, 16 lactating, pregnant Holstein cows were assigned to two replicates according to a crossover design with treatment switchback. All animals were confined to wooden metabolic cages and maintained under short day photoperiods (8 h light/16 h dark). Treated animals were exposed to a vertical electric field of 10 kV/m and a horizontal magnetic field of 30 microT (EMF) for 16 h/day for 4 weeks. In a second, similar experiment, 16 nonlactating, nonpregnant Holstein cows subjected to short days were exposed to EMF, using a similar protocol, for periods corresponding to the duration of one estrous cycle. In the first experiment, circulating MLT concentrations during the light period showed a small numerical decrease during EMF exposure (P < .05). Least-square means for the 8 h light period were 9.9 versus 12.4 pg/ml, SE = 1.3. Melatonin concentrations during the dark period were not affected by the treatment. A similar trend was observed in the second experiment, where MLT concentrations during the light period tended to be lower (8.8 pg/ml vs. 16.3 pg/ml, P < .06) in the EMF exposed group, and no effects were observed during the dark period. Plasma prolactin (PRL) was increased in the EMF exposed group (16.6 vs. 12.7 ng/ml, P < .02) in the first experiment. In the second experiment, the overall PRL concentrations found were lower, and the mean plasma PRL concentration was not affected by treatment. These experiments provide evidence that EMF exposure may modify the response of dairy cows to photoperiod.

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“…The exposure of dairy cattle to a vertical electric field of 10 kV/m and a uniform horizontal magnetic field of 30 μ T for 28 days did not change the nocturnal blood melatonin level [86]. Similarly, no changes in melatonin secretion were observed in other experiments performed on dairy cows [87, 88] and on lambs [89, 90]. The studies of American kestrels reveled that a long-term exposure to electromagnetic fields (60 Hz, 30 μ T, 10 kV · m −1 ) caused changes in melatonin secretion [91].…”

Section: Effects Of Electric Magnetic and Electromagnetic Fieldsmentioning

confidence: 95%

Influence of Electric, Magnetic, and Electromagnetic Fields on the Circadian System: Current Stage of Knowledge

Lewczuk

Redlarski

Żak

et al. 2014

BioMed Research International

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One of the side effects of each electrical device work is the electromagnetic field generated near its workplace. All organisms, including humans, are exposed daily to the influence of different types of this field, characterized by various physical parameters. Therefore, it is important to accurately determine the effects of an electromagnetic field on the physiological and pathological processes occurring in cells, tissues, and organs. Numerous epidemiological and experimental data suggest that the extremely low frequency magnetic field generated by electrical transmission lines and electrically powered devices and the high frequencies electromagnetic radiation emitted by electronic devices have a potentially negative impact on the circadian system. On the other hand, several studies have found no influence of these fields on chronobiological parameters. According to the current state of knowledge, some previously proposed hypotheses, including one concerning the key role of melatonin secretion disruption in pathogenesis of electromagnetic field induced diseases, need to be revised. This paper reviews the data on the effect of electric, magnetic, and electromagnetic fields on melatonin and cortisol rhythms—two major markers of the circadian system as well as on sleep. It also provides the basic information about the nature, classification, parameters, and sources of these fields.

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Melatonin and puberty in female lambs exposed to EMF: A replicate study

Cited by 28 publications

References 13 publications

Effect of occupational EMF exposure from radar at two different frequency bands on plasma melatonin and serotonin levels

Effect of occupational EMF exposure from radar at two different frequency bands on plasma melatonin and serotonin levels

Blood melatonin and prolactin concentrations in dairy cows exposed to 60 Hz electric and magnetic fields during 8 h photoperiods

Influence of Electric, Magnetic, and Electromagnetic Fields on the Circadian System: Current Stage of Knowledge

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