Study type: Medical/biological study (experimental study)

Influence of smartphone Wi-Fi signals on adipose-derived stem cells. med./bio.

Published in: J Craniofac Surg 2014; 25 (5): 1902-1907

Aim of study (acc. to author)

The effects of exposure of human adipose derived stem cells to a 2.4 GHz electromagnetic field (WiFi) on cell proliferation, apoptosis and differentiation should be investigated.

Background/further details

Cells were divided into three groups: 1) exposure to the 2.4 GHz electromagnetic field, 2) control group incubated at 37°C, 3) control group incubated at 39°C. Two control groups were used because in a preliminary test a temperature rise of about 2°C was measured in the exposed cell culture. Thus, the 39°C control group should account for possible thermal effects.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 2.4 GHz
Exposure duration: continuous for 10 hours/day for 5 days

Exposure 1

Main characteristics
Frequency 2.4 GHz
Type
Exposure duration continuous for 10 hours/day for 5 days
Additional info WiFi
Exposure setup
Exposure source
Distance between exposed object and exposure source 2 cm
Chamber culture plates in a CO2 incubator
Setup cells were incubated under a smartphone connected to a WiFi local area network (IEEE 802.11 g); the smartphone worked actively, uploading files at 600-KB/s or 4.8 Mbps (remark EMF-Portal: contradictory specifications) speed to a laptop connected to a wireless router; temperature in incubator was maintained at 37°C and CO2 5%
Additional info (remark EMF-Portal: it was not stated whether other potential EMF sources of the smartphone (e.g. GSM, Bluetooth) or MF of the incubator were deactivated during exposure)
Parameters
Measurand Value Type Method Mass Remarks
SAR 240 mW/kg - calculated - -
power density 26 µW/cm² mean - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Cell proliferation was significantly increased in the exposure group and in the 39°C control group compared to the 37°C control group.
All other parameters did not show any significant differences between the groups.
The authors conclude that exposure of human adipose derived stem cells to a 2.4 GHz electromagnetic field (WiFi) has no effects on cell proliferation, apoptosis and differentiation apart from thermal effects.

Study character:

Study funded by

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