Endocrine Abstracts

In this study, the effects of exposure to a 900 MHz electromagnetic field (EMF) on serum cortisol and triiodothronine–thyroxin (T₃–T₄) hormones levels of adult male Syrian Hamster were evaluated. Seventy two hamsters were used in three independent groups, 24 of which were control (without stress and EMF), 24 of which were exposed to 900 MHz EMF for 10 days and 24 of which were exposed to 900 MHz EMF for 50 days. The exposures were performed 1 h/d to 900 MHz EMF emitted from cellular phone. The concentration of cortisol and T₃–T₄ hormones in the hamster serum was measured by using an immunoradiometric assay (IRMA) method. Results showed cortisol values at the 900 MHz EMF group for 50 days higher than the other groups (P<0.01).Concentration of T₃ in the control group higher than the other groups (P<0.01) and Concentration of T₄ in the 900 MHz EMF group for 50 days higher than the other groups (P<0.01). These results indicate that 900 MHz EMF emitted by cellular telephones in long term exposure increased serum cortisol and T₄ levels and decreased T₃ level in Syrian Hamster, and it can destroy endocrine system generally.