Effects of GSM modulated radio-frequency electromagnetic radiation on permeability of blood-brain barrier in male & female rats.


Sırav B1, Seyhan N2

1Gazi University, Faculty of Medicine, Department of Biophysics, Ankara, Turkey; Gazi Non-Ionizing Radiation Protection Center, Ankara, Turkey. Electronic address: bahriyes76@gmail.com.
2Gazi University, Faculty of Medicine, Department of Biophysics, Ankara, Turkey; Gazi Non-Ionizing Radiation Protection Center, Ankara, Turkey.


Article history
Available online: 23 December 2015
In Press, Corrected ProofNote to users

Blood–brain barrier (BBB)
Evans blue (EB)
Radio frequency radiation (RFR)
Mobile phones


• Exposure to the pulse modulated radio-frequency radiation could lead to increase in the permeability of blood–brain barrier.

• New researches are needed to discuss the effects of radio-frequency radiation on children.

• Efforts have to be made to understand the mechanisms of the interaction of radio-frequency radiation and the central nervous system.


With the increased use of mobile phones, their biological and health effects have become more important. Usage of mobile phones near the head increases the possibility of effects on brain tissue. This study was designed to investigate the possible effects of pulse modulated 900MHz and 1800MHz radio-frequency radiation on the permeability of blood-brain barrier of rats. Study was performed with 6 groups of young adult male and female wistar albino rats. The permeability of blood-brain barrier to intravenously injected evans blue dye was quantitatively examined for both control and radio-frequency radiarion exposed groups. For male groups; Evans blue content in the whole brain was found to be 0.08±0.01mg% in the control, 0.13±0.03mg% in 900MHz exposed and 0.26±0.05mg% in 1800MHz exposed animals. In both male radio-frequency radiation exposed groups, the permeability of blood-brain barrier found to be increased with respect to the controls (p<0.01). 1800MHz pulse modulated radio-frequency radiation exposure was found more effective on the male animals (p<0.01). For female groups; dye contents in the whole brains were 0.14±0.01mg% in the control, 0.24±0.03mg% in 900MHz exposed and 0.14±0.02mg% in 1800MHz exposed animals. No statistical variance found between the control and 1800MHz exposed animals (p>0.01). However 900MHz pulse modulated radio-frequency exposure was found effective on the permeability of blood-brain barrier of female animals. Results have shown that 20minutes pulse modulated radio-frequency radiation exposure of 900MHz and 1800MHz induces an effect and increases the permeability of blood-brain barrier of male rats. For females, 900MHz was found effective and it could be concluded that this result may due to the physiological differences between female and male animals. The results of this study suggest that mobile phone radation could lead to increase the permeability of blood-brain barrier under non-thermal exposure levels. More studies are needed to demonstrate the mechanisms of that breakdown.

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