Circularly polarized, sinusoidal, 50 Hz magnetic field exposure does not influence plasma testosterone levels of rats

Abstract

We exposed rats to circularly polarized 50 Hz magnetic fields to determine if plasma testosterone concentration was affected. Previous experiments indicate that magnetic fields suppress the nighttime rise in melatonin, suggesting that other neuroendocrine changes might occur as well. Male Wistar-King rats were exposed almost continuously for 6 weeks to magnetic flux densities of 1, 5, or 50 microT. Blood samples were obtained by decapitation at 12:00 h and 24:00 h. Plasma testosterone concentration showed a significant day-night difference, with a higher level at 12:00 h when studied in July and December, but night difference, with a higher level at 12:00 h when studied in July and December, but the day-night difference disappeared when concentrations were studied in April. In three experiments, magnetic field exposure had no statistically significant effect on plasma testosterone levels compared with the sham-exposed groups. These findings indicate that 6 weeks of nearly continuous exposure to circularly polarized, 50 Hz magnetic fields did not change plasma testosterone concentration in rats.

Eight-Week Toxicity Study of 60 Hz Magnetic Fields in F344 Rats and B6C3F1 Mice

“…Similar results have been found with electric field exposure (Ragan et al, 1983). In another study, circularly polarized 50 Hz fields did not alter the male hormone, testosterone (Kato et al, 1994b). This same investigator found that linear fields, either horizontal or vertical, did not affect the pineal melatonin levels (Kato et al, 1994c) while circularly polarized fields exposures did cause a decrease in pineal melatonin (Kato et al, 1994a).…”

Effects of long-term exposure to radiofrequency radiations emitted by mobile Jammers on reproduction parameters in rats

“…In spite of, exposure to electromagnetic field 1 800 and 900 MHz for 2 h continuously per day for 90 d [31] and exposure to 1 800 MHz GSM-like [32] caused an enhance in testosterone level. However, exposure to circularly polarized with 50 Hz magnetic fields continuously for 6 wk in rats [33]; exposure to static magnetic fields 50 Hz for 40 min daily for 17 d [34]; and exposure to 50 Hz, 5 mT magnetic field for periods of 1, 2 and 4 wk [35] have no significant effects on testosterone level of male rats.…”

Endonuclease G is Upregulated and Required in Testicular Germ Cell Apoptosis after Exposure to 60 Hz at 200 μT

“…Those results suggested that germ cell apoptosis induced by ELF MF may not be hormonally mediated. Kato et al [36] reported that continuous exposure to circularly polarized 50 Hz magnetic fields of 50 μT for 6 weeks did not affect the plasma testosterone level in rats. In other report, exposure to a 50 Hz magnetic field of 5 mT had no effect on the testosterone level of rats for periods of 1, 2, and 4 weeks [37].…”