Effects of the electromagnetic field, 60 Hz, 3 microT, on the hormonal and metabolic regulation of undernourished pregnant rats.
Epidemiological studies have implicated maternal protein-calorie deficiency as an important public health problem in developing countries. Over the last decades, a remarkable diffusion of electricity and an increased level of the electromagnetic field (EMF) in the environment have characterized modern societies. Therefore, researchers are concerned with the biological effects of 50-60 Hz, EMF. The aim of this paper is to show the effects of EMF of 60 Hz, 3 muT, exposure for two hours per day in the regulation of the hormonal and metabolic concentrations in pregnant rats, which were fed by Regional Basic Diet (RBD) during their pregnancy as compared with pregnant rats fed a standard diet. Pregnant rats exposed to EMF of 60 Hz, 3 muT, over the pregnancy and fed with RBD presented an increase in glucose release when compared with the Group subjected only to the RBD ration. Rats fed RBD presented a decrease in their insulin and cortisol serum levels when compared with the Group fed with casein. The T3 and T4 concentrations presented the greatest variation among the Groups. The relation T4:T3 was much exaggerated in the Group subjected to RDB and exposed to EMF when compared to the others. In conclusion, the group subjected to the association of EMF and undernutrition suffered a decrease in its serum concentration of T4 and T3 when compared to the well-nourished group and the relationship T4:T3 in the former group was almost eighteen-fold the later one.
Anselmo
C W S F
CW
Departamento de Fisioterapia, Universidade Federal de Pernambuco, Recife, PE, Brazil, 50670-901. cwsfa@hotmail.com
Pereira
P B
PB
Catanho
M T J A
MT
Medeiros
M C
MC
D000818:Animals; D004574:Electromagnetic Fields / Q000009:adverse effects*; D005260:Female; D006854:Hydrocortisone / Q000097:blood / Q000528:radiation effects; D007328:Insulin / Q000097:blood / Q000528:radiation effects; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects / Q000097:blood*; D011502:Protein-Energy Malnutrition / Q000097:blood*; D051381:Rats; D017208:Rats, Wistar; D013974:Thyroxine / Q000097:blood / Q000528:radiation effects; D013997:Time Factors; D014284:Triiodothyronine / Q000097:blood / Q000528:radiation effects
D007328:Insulin; D014284:Triiodothyronine; D013974:Thyroxine; D006854:Hydrocortisone