Effects of chronic exposure to radiofrequency electromagnetic fields on energy balance in developing rats

Pelletier, Amandine; Delanaud, Stéphane; Décima, Pauline; Thuróczy, György; Seze, René de; Cerri, Matteo; Bach, Véronique; Libert, Jean‐Pierre; Loos, Nathalie

doi:10.1007/s11356-012-1266-5

Cited by 25 publications

(24 citation statements)

References 37 publications

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“…As previous study, spectral analysis confirmed that there were no effects of RF-EMF exposure on the EEG signal measured at the electrodes [4].…”

Section: Methodssupporting

confidence: 85%

“…Our previous study showed that this intensity of exposure does not induce central heating. In this work, this intensity was associated with a significantly lower tail skin temperature (1.21°C below the control value at a T a of 31°C), independently of the sleep stage [4]. The present study aimed at assessing the changes in thermal preference and sleep stage distribution that may potentially be influenced by a difference in skin temperature [11], [16].…”

Section: Introductionmentioning

confidence: 75%

“…In our earlier study, the tail skin temperature was recorded with temperature probe located at the base of the tail [4]. The skin temperature will depend on where on the tail it is measured.…”

Section: Methodsmentioning

confidence: 99%

“…Although a number of studies have found a relationship between the proximity of a base station antenna and the presence of symptoms (such as headache, memory changes, anxiety, sleep disturbance or feelings of discomfort) but this topic remains subject to debate [1], [2], [3]. In previous research, we found that rats exposed to low-intensity RF-EMF (900 MHz, 1 V.m −1 ) at an ambient temperature (T a) of 31°C exhibited (i) unusually high peripheral vasoconstrictor tone and (ii) fragmentation of their paradoxical sleep (relative to non-exposed controls) [4]. The core temperature inside the brain was normal.…”

Section: Introductionmentioning

confidence: 92%

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Does Exposure to a Radiofrequency Electromagnetic Field Modify Thermal Preference in Juvenile Rats?

et al. 2014

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Some studies have shown that people living near a mobile phone base station may report sleep disturbances and discomfort. Using a rat model, we have previously shown that chronic exposure to a low-intensity radiofrequency electromagnetic field (RF-EMF) was associated with paradoxical sleep (PS) fragmentation and greater vasomotor tone in the tail. Here, we sought to establish whether sleep disturbances might result from the disturbance of thermoregulatory processes by a RF-EMF. We recorded thermal preference and sleep stage distribution in 18 young male Wistar rats. Nine animals were exposed to a low-intensity RF-EMF (900 MHz, 1 V.m−1) for five weeks and nine served as non-exposed controls. Thermal preference was assessed in an experimental chamber comprising three interconnected compartments, in which the air temperatures (Ta) were set to 24°C, 28°C and 31°C. Sleep and tail skin temperature were also recorded. Our results indicated that relative to control group, exposure to RF-EMF at 31°C was associated with a significantly lower tail skin temperature (−1.6°C) which confirmed previous data. During the light period, the exposed group preferred to sleep at Ta = 31°C and the controls preferred Ta = 28°C. The mean sleep duration in exposed group was significantly greater (by 15.5%) than in control group (due in turn to a significantly greater amount of slow wave sleep (SWS, +14.6%). Similarly, frequency of SWS was greater in exposed group (by 4.9 episodes.h−1). The PS did not differ significantly between the two groups. During the dark period, there were no significant intergroup differences. We conclude that RF-EMF exposure induced a shift in thermal preference towards higher temperatures. The shift in preferred temperature might result from a cold thermal sensation. The change in sleep stage distribution may involve signals from thermoreceptors in the skin. Modulation of SWS may be a protective adaptation in response to RF-EMF exposure.

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“…As previous study, spectral analysis confirmed that there were no effects of RF-EMF exposure on the EEG signal measured at the electrodes [4].…”

Section: Methodssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 75%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

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Does Exposure to a Radiofrequency Electromagnetic Field Modify Thermal Preference in Juvenile Rats?

et al. 2014

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“…Concern has been raised about the potential negative influence of RF on a developing brain [75]. Brain development in mammals is time and growth factor-dependent and extremely sensitive to external insult that might compromise future network functions.…”

Section: The Effect Of Rf Exposure In Vivo: New Insights On Biosystemmentioning

confidence: 99%

Searching for the Perfect Wave: The Effect of Radiofrequency Electromagnetic Fields on Cells

Gherardini

Ciuti

Tognarelli

et al. 2014

IJMS

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There is a growing concern in the population about the effects that environmental exposure to any source of “uncontrolled” radiation may have on public health. Anxiety arises from the controversial knowledge about the effect of electromagnetic field (EMF) exposure to cells and organisms but most of all concerning the possible causal relation to human diseases. Here we reviewed those in vitro and in vivo and epidemiological works that gave a new insight about the effect of radio frequency (RF) exposure, relating to intracellular molecular pathways that lead to biological and functional outcomes. It appears that a thorough application of standardized protocols is the key to reliable data acquisition and interpretation that could contribute a clearer picture for scientists and lay public. Moreover, specific tuning of experimental and clinical RF exposure might lead to beneficial health effects.

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Low‐Level Radiofrequency Exposure Induces Vasoconstriction in Rats

Cuc

Braun

Bach

et al. 2021

Bioelectromagnetics

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Recent studies have revealed that rodents' physiological responses to low intensity radiofrequency electromagnetic fields (RF) were similar to thermoregulatory responses to cold conditions. The primary autonomic response to cold exposure is peripheral vasoconstriction that allows rodents to reduce heat loss and maintain a relatively constant internal body temperature. In the present study, we investigated the effects of 900 MHz RF at a low level (SAR of 0.35 W.kg -1 ) on tail skin temperature (T tail ) in rats. We showed that rats exposed to RF had lower T tail than control rats at ambient temperatures between 27 and 28 °C, suggesting that RF could induce a noticeable degree of vasoconstriction under mild-warm ambient temperatures. This difference in T tail was suppressed after the intraperitoneal injection of a vasodilator, an α-adrenergic antagonist, confirming the hypothesis of the vasoconstriction in exposed rats. Moreover, like a response to cold stimuli, RF exposure led to a higher plasma concentration of important factors involved in response to cold: noradrenaline, a neurotransmitter responsible for vasoconstriction and thermogenesis, and fatty acids, markers of activated thermogenesis. Taken together, these findings indicate that low-intensity RF levels triggered some key physiological events usually associated with responses to cold in rats.

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Effects of chronic exposure to radiofrequency electromagnetic fields on energy balance in developing rats

Cited by 25 publications

References 37 publications

Does Exposure to a Radiofrequency Electromagnetic Field Modify Thermal Preference in Juvenile Rats?

Does Exposure to a Radiofrequency Electromagnetic Field Modify Thermal Preference in Juvenile Rats?

Searching for the Perfect Wave: The Effect of Radiofrequency Electromagnetic Fields on Cells

Low‐Level Radiofrequency Exposure Induces Vasoconstriction in Rats

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