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Medical/biological study (observational study)

Micronucleus frequency in buccal mucosa cells of mobile phone users.

Published in: Toxicol Lett 2010; 193 (1): 124-130

Aim of study (acc. to author)

To investigate the effect of mobile phone use on genomic instability of the human oral cavitiy's mucosa cells.
Background/further details: The study of Yadav et al (2008) in which increased numbers of micronuclei among mobile phone users were found should be replicated. In the present study a higher number of participants (n=131) was examined and a double amount of cells (2000 cells/individual) was counted to increase the statistical power. Furthermore a different, DNA-specific staining procedure was applied.
Each participant filled out a questionnaire about mobile phone use including duration of weekly use, overall period of use and headset usage for exposure assessment. The participants were divided into eleven groups: no use of mobile phones, 0-3 h/week, >3-6 h/week, >6-9 h/week, >9-12 h/week, and >12-15 h/week; <5 years, 5-10 years and >10 years period of mobile phone use; use and non-use of headsets.
Cells of four patients after four weeks of radiotherapy served as positive controls for the micronucleus test.

Endpoint

Exposure

Exposure Parameters
Exposure 1:
  • unspecified
Exposure duration: up to 15 hr/week for up to 10 years and more
-
Exposure 1
Main characteristics
Frequency
  • unspecified
Type
Exposure duration up to 15 hr/week for up to 10 years and more
Exposure setup
Exposure source
Parameters
No parameters are specified for this exposure.
Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated material:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

No differences in micronucleus frequencies were found between persons with different periods of duration (in years) of mobile phone use. No differences in micronucleus frequencies were observed between head set users or persons without headset use. No influence on the micronucleus frequencies was found for different duration of daily mobile phone use (h/week).
The authors concluded that mobile phone use did not lead to significantly higher number of micronuclei. The results of study by Yadav et al (2008) could not be confirmed.
Study character:

Study funded by

  • Elite Network of Bavaria (Elitenetzwerk Bayern), Germany

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