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DNA & Genetic Damage

Genome-wide transcription analysis of Escherichia coli in response to extremely low-frequency magnetic fields

No Effects Found

Huwiler SG et al · 2012

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The study found that 50 Hz, 1 mT magnetic fields did not affect transcription in E. coli.

Plain English Summary

Summary written for general audiences

No changes in bacterial growth or culturable counts were observed for any of the magnetic field types. Gene expression analysis of 4,358 genes and 714 intergenic regions showed no statistically significant changes after exposures of 2.5 hours or 15 hours.

Why This Matters

The study aimed to test whether extremely low-frequency magnetic fields influence transcription in E. coli. The authors concluded that the tested magnetic fields did not affect transcription.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 50 Hz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 50 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Cite This Study
Huwiler SG et al (2012). Genome-wide transcription analysis of Escherichia coli in response to extremely low-frequency magnetic fields.
Show BibTeX
@article{huwiler_sg_et_al_february_2012_genome_wide_transcription_analysis_of_escherichia_coli_in_response_to_extremely_low_frequency_magnetic_fields_bioelectromagnetics_ce2093,
  author = {Huwiler SG et al},
  title = {Genome-wide transcription analysis of Escherichia coli in response to extremely low-frequency magnetic fields},
  year = {2012},
  doi = {10.1002/bem.21709},
  
}
DOI: 10.1002/bem.21709PubMed: 22331529

Quick Questions About This Study

The study tested three signal types: sinusoidal continuous, sinusoidal intermittent, and power line intermittent, all at 50 Hz and 1 mT.
Gene expression was monitored at the transcript level using an Affymetrix whole-genome microarray representing 4,358 genes and 714 intergenic regions.
For all three magnetic field types, neither bacterial growth nor culturable counts were affected.
No statistically significant changes in gene expression were detected after exposures of 2.5 hours or 15 hours.
The researchers concluded that the tested magnetic fields did not affect transcription in E. coli.