To assess the relationship between occupational magnetic field exposure, the urinary melatonin metabolite 6-hydroxymelatoninsulfate and concentrations of amyloid beta protein, a protein (40-42 amino acids) associated with the lesions of Alzheimer's disease.
60 male employees from three electric utilities participated.
Exposure duration: during the first 3 days of the week
|magnetic flux density||0.12 µT||-||measured||-||distribution and generation workers|
|magnetic flux density||0.06 µT||-||measured||-||administration and maintenance workers|
|magnetic flux density||0.3 µT||mean||measured||-||arithmetic mean for all workers|
|magnetic flux density||0.11 µT||mean||measured||-||geometric mean for all workers|
Average amyloid beta protein levels were positively associated with categories of magnetic field exposure, but this relationship was weak and not statistically significant. The melatonin metabolite was inversely correlated with amyloid beta protein (amino acids 1-42) and the ratio of "amyloid beta protein (amino acids 1-42) to amyloid beta protein (amino acids 1-40)".