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[Possible mutagenic effects of magnetic fields].

E M Teichmann1, J G Hengstler, W G Schreiber

  • 1Klinik für Radiologie und Strahlentherapie. teich@radiologie.klinik.uni-mainz.de

Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|January 6, 2001
PubMed
Summary

Static magnetic fields up to 7.2 T, gradient fields, and high-frequency fields did not demonstrate mutagenic effects in bacterial strains. The Salmonella mutagenicity test (Ames test) confirmed no significant alterations in mutagenicity, even with genotoxic chemicals.

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Area of Science:

  • Biophysics
  • Genetics
  • Medical Imaging

Background:

  • Magnetic Resonance Imaging (MRI) utilizes static and dynamic magnetic fields.
  • Assessing the safety of these fields, particularly potential mutagenicity, is crucial for clinical applications.

Purpose of the Study:

  • To evaluate the mutagenic potential of static magnetic fields (1.5 T and 7 T), gradient fields, and high-frequency magnetic fields.
  • To determine if these fields influence the mutagenicity of known genotoxic chemicals.

Main Methods:

  • The Salmonella mutagenicity test (Ames test) was employed.
  • Bacterial strains (his- to his+) were exposed to various magnetic field conditions (1.5 T, 7.2 T static, gradient, high-frequency) with and without genotoxic chemicals.

Main Results:

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  • No significant difference in the number of revertants was observed between exposed and control bacterial cells.
  • Co-exposure with known genotoxic chemicals did not alter the mutagenicity results.

Conclusions:

  • Static magnetic fields, even at 7.2 T, do not appear to affect mutagenicity in standard tester strains.
  • Exposure to gradient or high-frequency fields also showed no alteration in bacterial mutagenicity.