Abstract

Overview

With the advancement of ultra-high-voltage direct-current (UHVDC) transmission systems, there has been a significant increase in the intensity of static electric fields (SEF) surrounding these power lines. This has led to heightened public concern regarding the possible health implications of SEF exposure.

Findings

• The study utilized Institute of Cancer Research mice, subjecting them to 56.3 kV/m SEF for varying durations:
• Short-term exposure (7 days) resulted in:
• Increased escape latency in the Morris water maze test.
• Decreased number of platform-site crossovers and less time spent in the target quadrant.
• Significant changes in levels of serotonin and glutamate to γ-aminobutyric acid ratios.
• Increased malondialdehyde content and glutathione peroxidase activity, with decreased superoxide dismutase activity.
• No significant differences were observed between SEF and sham exposure mice after long-term exposure (49 days), suggesting a temporary impact.

Conclusion

Exposure to a static electric field of 56.3 kV/m may induce reversible disturbances in neurotransmitters and oxidative balance in mice, impacting learning and memory abilities temporarily. These findings underscore potential concerns over short-term SEF exposure, but also show a normalization of functions with prolonged exposure.