Effects of 50 Hz magnetic fields on circadian rhythm control in mice

Abstract

Overview

This study investigates the influence of 50 Hz magnetic fields and blue LED light on the circadian rhythm control in male C57BL/6J mice.

Findings

• Mice were exposed to 50 Hz magnetic fields at 580 μT and/or a blue LED light at 700 lux.
• Significant adrenal response was noted only to blue light exposure, seen as increased adrenal per1 gene expression, heightened serum corticosterone levels, more time spent sleeping, and reduced locomotor activity.
• No significant modulating effect of the magnetic fields on light response was observed.
• Magnetic fields alone did not show significant effect on gene expression of the cryptochromes cry1 and cry2.
• Decreased locomotor activity was the only significant response to the magnetic fields alone.

Conclusion

The research concludes that 50 Hz magnetic fields, as found commonly in built environments, do not notably alter the acute light-induced adrenal response. It is important to continuously monitor these results to further understand the broader implications of electromagnetic exposure on health.