Abstract
Abstract—A significant decrease in the respiratory burst activity of a neutrophil suspension has been recorded in response to N-formyl–Met–Leu–Phe peptide activation after a 40-min exposure to weak combined magnetic fields: a static magnetic field (60 μT) and a collinear low-frequency magnetic field with a frequency of 49.5 Hz within the 60–180 nT range. This lower response was shown by luminol-dependent chemiluminescence. The frequency of 49.5 Hz of the alternating component of combined magnetic fields nominally corresponds to the Fe3+ ion cyclotron resonance frequency. At closely spaced frequencies (46 and 48.5 Hz), the biological effect of the combined magnetic fields was three times less pronounced. There was no biological effect at 33 Hz, the frequency of the alternating component of combined magnetic fields. The exposure to a magnetic signal that is the sum of all of the investigated frequencies (33.0, 46.0, 48.5 and 49.5 Hz) resulted in a effect that was two times less pronounced compared to that after the exposure to combined magnetic fields at 49.5 Hz.
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