1.Effects of exposure to GSM mobile phone base station signals on salivary cortisol, alpha-amylase, and immunoglobulin A.
Christoph AUGNER ; Gerhard W HACKER ; Gerd OBERFELD ; Matthias FLORIAN ; Wolfgang HITZL ; Jörg HUTTER ; Gernot PAUSER
Biomedical and Environmental Sciences 2010;23(3):199-207
OBJECTIVEThe present study aimed to test whether exposure to radiofrequency electromagnetic fields (RF-EMF) emitted by mobile phone base stations may have effects on salivary alpha-amylase, immunoglobulin A (IgA), and cortisol levels.
METHODSFifty seven participants were randomly allocated to one of three different experimental scenarios (22 participants to scenario 1, 26 to scenario 2, and 9 to scenario 3). Each participant went through five 50-minute exposure sessions. The main RF-EMF source was a GSM-900-MHz antenna located at the outer wall of the building. In scenarios 1 and 2, the first, third, and fifth sessions were "low" (median power flux density 5.2 microW/m(2)) exposure. The second session was "high" (2126.8 microW/m(2)), and the fourth session was "medium" (153.6 microW/m(2)) in scenario 1, and vice versa in scenario 2. Scenario 3 had four "low" exposure conditions, followed by a "high" exposure condition. Biomedical parameters were collected by saliva samples three times a session. Exposure levels were created by shielding curtains.
RESULTSIn scenario 3 from session 4 to session 5 (from "low" to "high" exposure), an increase of cortisol was detected, while in scenarios 1 and 2, a higher concentration of alpha-amylase related to the baseline was identified as compared to that in scenario 3. IgA concentration was not significantly related to the exposure.
CONCLUSIONSRF-EMF in considerably lower field densities than ICNIRP-guidelines may influence certain psychobiological stress markers.
Adolescent ; Adult ; Aged ; Cell Phone ; Female ; Humans ; Hydrocortisone ; analysis ; Immunoglobulin A ; analysis ; Male ; Middle Aged ; Saliva ; chemistry ; Young Adult ; alpha-Amylases ; analysis