Effets d’une exposition chronique à des ondes radiofréquences sur l’équilibre énergétique chez des rats en développement

Archive ouverte

de Seze, René

Edité par CCSD -

International audience. Main functions involved in body energy homeostasis (feeding, sleep and thermoregulation) were studied in rats chronically exposed to Radiofrequency electromagnetic fields (RF-EMF) (900 MHz, 1 V.m−1). Juvenile male Wistar rats (N=13) were exposed to continuous RF for 5 weeks at 24°C and compared with non-exposed animals (N=11). At the beginning of the 6th week of exposure, functions were recorded for 6 h, first at air temperature (Ta) of 24°C and then at 31°C. The frequency of rapid eye movement sleep episodes was greater in the exposed group, independently of Ta (+42.1% at 24°C and +31.6% at 31°C). Other effects of exposure were dependent on Ta. At 31°C, RF-EMF-exposed rats had a lower subcutaneous tail temperature (−1.2°C) than controls at all sleep stages; suggestion of peripheral vasoconstriction was confirmed with the vasodilatator prazosin. Daytime food intake was also increased (+0.2 g.h−1). RF-EMF modifies the vasomotor tone through peripheral - adrenoceptors. Vasoconstriction restricts body cooling, as energy intake increases. Exposure then induces energy-saving processes without strongly disturbing the sleep pattern. . Les effets d’une exposition continue aux radiofréquences sur les fonctions de l’équilibre énergétique du jeune rat ont été étudiés : le sommeil, la thermorégulation et la prise alimentaire. Le niveau d’exposition simulé dans l’étude correspond à celui rencontré à proximité des antennes-relais. Vingt-quatre rats mâles, âgés de 3 semaines, ont été acclimatés aux conditions de l’étude pendant trois semaines, puis ont été équipés de capteurs physiologiques.

• Description
• Sujet/Public
• Outil
• Outil d'anticipation
• Mémoire et thèse
• Gestion