Environmental Science and Pollution Research

, Volume 20, Issue 5, pp 2735–2746

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

  • Amandine Pelletier
  • Stéphane Delanaud
  • Pauline Décima
  • Gyorgy Thuroczy
  • René de Seze
  • Matteo Cerri
  • Véronique Bach
  • Jean-Pierre Libert
  • Nathalie Loos
Ecotoxicology and Environmental Toxicology : new concepts, new tools

Abstract

The effects of radiofrequency electromagnetic fields (RF-EMF) on the control of body energy balance in developing organisms have not been studied, despite the involvement of energy status in vital physiological functions. We examined the effects of chronic RF-EMF exposure (900 MHz, 1 V m−1) on the main functions involved in body energy homeostasis (feeding behaviour, sleep and thermoregulatory processes). Thirteen juvenile male Wistar rats were exposed to continuous RF-EMF for 5 weeks at 24 °C of air temperature (Ta) and compared with 11 non-exposed animals. Hence, at the beginning of the 6th week of exposure, the functions were recorded at Ta of 24 °C and then at 31 °C. We showed that the frequency of rapid eye movement sleep episodes was greater in the RF-EMF-exposed group, independently of Ta (+42.1 % at 24 °C and +31.6 % at 31 °C). The other effects of RF-EMF exposure on several sleep parameters were dependent on Ta. At 31 °C, RF-EMF-exposed animals had a significantly lower subcutaneous tail temperature (−1.21 °C) than controls at all sleep stages; this suggested peripheral vasoconstriction, which was confirmed in an experiment with the vasodilatator prazosin. Exposure to RF-EMF also increased daytime food intake (+0.22 g h−1). Most of the observed effects of RF-EMF exposure were dependent on Ta. Exposure to RF-EMF appears to modify the functioning of vasomotor tone by acting peripherally through α-adrenoceptors. The elicited vasoconstriction may restrict body cooling, whereas energy intake increases. Our results show that RF-EMF exposure can induce energy-saving processes without strongly disturbing the overall sleep pattern.

Keywords

Radiofrequency electromagnetic field Sleep Feeding behaviour Thermoregulation Young rat 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Amandine Pelletier
    • 1
  • Stéphane Delanaud
    • 1
  • Pauline Décima
    • 1
  • Gyorgy Thuroczy
    • 2
  • René de Seze
    • 2
  • Matteo Cerri
    • 3
  • Véronique Bach
    • 1
  • Jean-Pierre Libert
    • 1
  • Nathalie Loos
    • 1
  1. 1.PériTox Laboratory (EA 4285-UMI01), Faculty of MedicineJules Verne University of Picardy (UPJV)Amiens cedex 1France
  2. 2.PériTOX Laboratory (EA 4285-UMI01), VIVA/TOXINational Institute of Industrial Environment and Risks (INERIS)Verneuil-en-HalatteFrance
  3. 3.Department of Human and General PhysiologyAlma Mater Studiorum-University of BolognaBolognaItaly

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