Authors : S. Mosaferi, P. Khatamino, Z. Ostadi, T. Jalili, A. Davasaztabrizi and A. Kaveh
Abstract: Retained placenta (after birth of calves) in cattle (especially dairy) is seen in comparison with other animals. Typically, placenta of cows should be expelled within 24 h after delivery. If whole or some part of the placenta remained after birth for a longer time, it is considered a pathological or abnormal condition. Remaining part of the placenta is more common and most commonly involved parts are the pregnant ovaries. The frequency of retained placenta in cattle herds is 7-10% in normal condition. The purpose of this study is to inspect a metabolic parameter with the retained placenta rate. Researchers measured activity of glutathione peroxidase enzyme dependent to selenium in blood samples of healthy cows and remained placenta cows. After statistical analyzing, it was seen that difference between activity levels mean of GPX enzyme dependent to selenium in healthy cows is significantly more than placenta remained cows (p<0.0001). The average level of selenium-dependent GPX in healthy cows is 73/78 u/g Hb and its in placenta remained cows is 58/25 u/g Hb. According to the lack of other pathogenic and mechanical factors that cause placental retention in this study and absence of other disease and consider to providing enough proteins in these cows, researchers can suppose that the activity level of GPX enzyme in blood samples in direct relation to selenium amount. Although, researchers can say in the absence of pathogen factors, increasing placenta retention rate shows metabolic deficit and here vitamin E and selenium has the main role.
S. Mosaferi, P. Khatamino, Z. Ostadi, T. Jalili, A. Davasaztabrizi and A. Kaveh, 2013. Study of Relationship Between Selenium-Dependent Glutathione Peroxidase and Retained Placenta in Dairy Cows. Research Journal of Biological Sciences, 8: 119-123.