Study type: Medical/biological study (experimental study)

Effects of Electromagnetic Field of UHV Transmission Lines Exposure on Testis Tissue in Mice med./bio.

Published in: IEEE Trans Magn 2009; 45 (10): 4853-4856

Aim of study (acc. to author)

To investigate whether extremely low frequency magnetic fields similar to those of transmission lines affect the testis tissue of mice.

Background/further details

40 mice (20 male, 20 female) were divided into an exposure and a sham exposure group (10 males and 10 females in each group).
Remark EMF-Portal: The employment of female mice does not make sense in the examined endpoints (testis).

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: continuous for 7 weeks (24 h/day)

Exposure 1

Main characteristics
Frequency 50 Hz
Type
Exposure duration continuous for 7 weeks (24 h/day)
Exposure setup
Exposure source
Chamber 5 mice were kept in one cage, respectively
Setup electric field was induced by three-phase voltage lines which were connected to a secondary coil of the step-up transformer; lines were assumed to be straight, parallel to each other, with an equal distance (0.3 m); magnetic field was induced by three-phase current lines connected to a secondary coil of the step-down transformer and located beneath the insulating board; ground clearance of central line of the insulating board was 0.45 meter; primary coils of two transformers were respectively connected to two three-phase voltage dividers; mice cages were fixed at one side of B phase line (mid line)
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 4.5 kV/m maximum calculated - -
electric field strength 3.5 kV/m minimum calculated - -
magnetic flux density 40 µT minimum - - -
magnetic flux density 48 µT maximum - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

No significant differences in the serum level of gamma-glutamyltransferase were found between the exposure and the sham exposure group (remark EMF-Portal: no data given for the level of gamma-glutamyltransferase in the testis).
The histopathological examination of the testis revealed no differences between the exposure and the sham exposure group.
In exposed rats, the cell proliferation and the number of germ cells in the S-phase were significantly decreased compared to the sham exposed rats, while no difference regarding the number of chromosome sets was observed.

Study character:

Study funded by

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