بررسي مقادير ظرفيت كل آنتي اكسيداني (TAC) پلاسماي گاوهاي شيري نژاد هلشتاين در پايان آبستني و ارتباط آن با مقدار پارامتر فوق در گوساله هاي نوزاد حاصله

Study of plasma total antioxidant capacity (TAC) of dairy Holstein cow in late pregnancy and its correlation with newborn calves

Free radicals can be produced during the respiratory oxidation of different cells. These free radicls can damage to various macromolecules as protein,fat,nucleic acids and...,are harmful for body. The natural defence system that can prevent the damage of free radicals and neutralize them,have tittled under the name of total antioxidant capacity(TAC)and probably can transport from maternal plasma to its fetus or by clostrum after calving. In this respect we have determined 100 dairy cattle(2weeks before calving)and its calves(3 day calf after reciving clostrum) and measured plasma TAC level in them by ferric reducing ability of plasma (frap)method. The results were analyzed by T_test and pearson correlation and positive correlation was shown between maternal and newborn plasma TAC with (r=0.47 and p<0.005)by meanvalue(1222+_0.88) M mol/lit in cows and (963+_0.73) Mmol/lit in calves. Then could be determined the possitive transport of antioxidant agents from maternal blood to fetus in pregnancy course with combination of clostrum after 3 days of calf birth, so care a rich antioxidant status in pregnant cow and then in its newborn calves,is a way to improve management and decrease pathological damage from different oxidative stress in cow and calves. Vet. J. of Islamic. Azad. Univ., Garmsar Branch. 4,1:17-20,2008