Study type: Medical/biological study (experimental study)

Immunotropic influence of 900 MHz microwave GSM signal on human blood immune cells activated in vitro. med./bio.

Published in: Electromagn Biol Med 2006; 25 (1): 45-51

Aim of study (acc. to author)

The authors investigated how active cells, e.g. stimulated in vitro with mitogens and entering G1 phase and S phase, will react to the exposure to microwaves.

Background/further details

Cells were stimulated with phytohemagglutinin or with concanavalin A.
Cells were exposed immediately after entering the G1 phase (first day of exposure), again when the majority of cells responding to mitogen entered the S phase (second day of exposure), and finally when the responding cells reached G2 phase and mitosis (third day of exposure).

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: repeated daily exposure, 15 min at the beginning of each day, for 3 days

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Charakteristic
Exposure duration repeated daily exposure, 15 min at the beginning of each day, for 3 days
Modulation
Modulation type pulsed
Pulse width 577 µs
Repetition frequency 217 Hz
Additional info

GSM system

Exposure setup
Exposure source
Distance between exposed object and exposure source 6 cm
Chamber A miniature anechoic chamber of 23 x 23 x 23 cm internal dimensions was located inside an incubator.
Setup A microplate with cultured cells was placed in the middle of the chamber with a mobile phone on the floor.
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 27 V/m - measured - ±15%
power density 1.93 W/m² - measured - -
SAR 0.024 W/kg - measured and calculated - -

Reference articles

  • Dabrowski MP et al. (2003): Immunotropic effects in cultured human blood mononuclear cells pre-exposed to low-level 1300 MHz pulse-modulated microwave field

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

Peripheral blood mononuclear cells exposed to microwaves demonstrated significantly higher response to mitogens and higher immunogenic activity of monocytes than control cultures. The proliferative response of T lymphocytes exposed to microwaves increased significantly.
The data suggest that immune activity of responding lymphocytes and monocytes can be additionally intensified by 900 MHz microwaves.

Study character:

Study funded by

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