Nittby H, Brun A, Eberhardt J, Malmgren L, Persson BR, Leif SG. 2009. Increased blood–brainbarrier permeability in mammalian brain 7 days after exposure to the radiation from a GSM-900mobile phone. Pathophysiology 16(2-3): 103-112. The blood-brain barrier (BBB) is necessary for the protection of the mammalian brainfrom potentially harmful substances circulating in the blood. It consists of the vascularendotelial cells of the capillaries of the brain and the glial cells wrapped around them. In thisresearch, scientists investigated the effects of GSM (Global System for Mobile communications)mobile phone radiation upon the blood–brain barrier permeability of rats 7 days after a singleexposure in TEM-cells for 2 hrs. at non-thermal specific absorption rates (SARs) of 0 mW/kg,0.12 mW/kg, 1.2 mW/kg, 12 mW/kg and 120 mW/kg. There was a low, but significantcorrelation between the SAR value and occurrence of focal albumin extravasation (escape) overthe blood-brain barrier. This study provides evidence that GSM exposure results in disruption ofthe BBB permeability 7 days after the exposure occurred.