Study type: Medical/biological study (experimental study)

Effects of 900-MHz electromagnetic field emitted from cellular phone on brain oxidative stress and some vitamin levels of guinea pigs. med./bio.

Published in: Brain Res 2007; 1169: 120-124

Aim of study (acc. to author)

To study the effects of 900 MHz electromagnetic field emitted from cellular phone on brain tissue and blood malondialdehyde, glutathione, retinol (vitamin A), vitamin D3 and tocopherol (vitamin E) levels, and catalase enzyme activity of guinea pigs (n=14).

Endpoint

Exposure

Exposure Parameters
Exposure 1: 890–915 MHz
Modulation type: pulsed
Exposure duration: continuous for 12 h/day (11 h 45 min stand-by mode, 15 min speaking mode) on 30 days

Exposure 1

Main characteristics
Frequency 890–915 MHz
Type
Exposure duration continuous for 12 h/day (11 h 45 min stand-by mode, 15 min speaking mode) on 30 days
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power 2 W peak value - - -
SAR 0.95 W/kg - - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Malondialdehyde level increased, glutathione level and catalase enzyme activity decreased, and vitamin A, vitamine E and vitamin D3 levels did not change in the brain tissues of exposed guinea pigs.
In addition, malondialdehyde, vitamin A, vitamin D3 and vitamin E levels, and catalse enzyme activity increased, and glutathione level decreased in the blood of exposed guinea pigs.
The authors conclude that electromagnetic field emitted from cellular phone might produce oxidative stress in brain tissue of guinea pigs. However, more studies are needed to demonstrate whether these effects are harmful.

Study character:

Study funded by

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