Melatonin Metabolite Levels in Workers Exposed to 60-Hz Magnetic Fields:Work in Substations and with 3-Phase Conductors
作者:
James Burch,
John Reif,
Curtis Noonan,
Michael Yost,
期刊:
Journal of Occupational and Environmental Medicine
(OVID Available online 2000)
卷期:
Volume 42,
issue 2
页码: 136-142
ISSN:1076-2752
年代: 2000
出版商: OVID
数据来源: OVID
摘要:
Melatonin suppression by 50/60-Hz magnetic fields represents a plausible biological mechanism for explaining increased health risks in workers. Personal exposure to magnetic fields and ambient light, and excretion of the melatonin metabolite 6-hydroxymelatonin sulfate (6-OHMS), were measured over 3 consecutive workdays in electric utility workers. There was a magnetic field–dependent reduction in adjusted mean nocturnal and post-work 6-OHMS levels among men working more than 2 hours per day in substation and 3-phase environments and no effect among those working 2 hours or less. No changes were observed among men working in 1-phase environments. The results suggest that circular or elliptical magnetic field polarization, or another factor linked to substations and 3-phase electricity, is associated with magnetic field induced melatonin suppression in humans.
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