Exposure of S. cerevisiae to pulsed magnetic field during chronological aging could induce genomic DNA damage

ABSTRACT

This study evaluates the DNA damage induced by pulsed magnetic field (MF) on S. cerevisiae cells exposed during chronological aging. Samples were exposed to 25 Hz pulsed MF (1.5mT, 8 h/day) while cells were aging chronologically. Clonogenic drop test was used to study cellular survival and the mutation frequency was evaluated by scoring the spontaneous revertant mutants. DNA damage analysis was performed after aging by electrophoresis and image analysis. Yeast cells aged during 40 days of exposure showing that pulsed MF exposure induced a premature aging. In addition, a gradual increase in spontaneous mutants was found in pulsed MF samples in relation to unexposed controls. An increase in DNA degradation, over the background level in relation to controls, was observed at the end of the exposure period. In conclusion, exposure of S. cerevisiae cells to pulsed MF during chronological aging could induce genomic DNA damage.

KEYWORDS:

• Aging
• magnetic field
• DNA damage
• S. cerevisiae

Acknowledgments

We wish to thank Dr A. Friedl (Department of Radiation Oncology, Ludwig-Maximilians-Universität München, Munich, Germany) for the supply of yeast cells. Thanks to Ms. L. Gil-Carmona (Universidad de Málaga, Spain) for her technical assistance.

Disclosure statement

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This study was sponsored by: ‘Plan Andaluz de Investigación, Desarrollo e Innovación (PAIDI); Junta de Andalucía’, code CTS-181.