60-Hz electric-field effects on pineal melatonin rhythms: time course for onset and recovery.
Rats exposed for 3 weeks to uniform 60-Hz electric fields of 39 kV/m (effective field strength) failed to show normal pineal gland circadian rhythms in serotonin N-acetyl transferase activity and melatonin concentrations. The time required for recovery of the melatonin rhythm after cessation of field exposure was determined to be less than 3 days. The rapid recovery suggests that the overall metabolic competence of the pineal is not permanently compromised by electric-field exposure, and that the circadian rhythm effect may be neuronally mediated.
D000818:Animals; D001191:Arylamine N-Acetyltransferase / Q000378:metabolism; D002940:Circadian Rhythm / Q000528:radiation effects; D004574:Electromagnetic Fields; D055590:Electromagnetic Phenomena; D007700:Kinetics; D008297:Male; D008550:Melatonin / Q000378:metabolism*; D010870:Pineal Gland / Q000378:metabolism / Q000528:radiation effects*; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors
D001191:Arylamine N-Acetyltransferase; D008550:Melatonin