Changes in Serum ACTH and Cortisol Concentrations after Administration of Arginine-Vasopressin (AVP) in Dairy Cattle

抄録

AVP (0.18mg/animal) was intravenously injected in dairy cattle to evaluate the potential of AVP as a releaser of ACTH and cortisol. AVP administration immediately increased serum ACTH concentration from 151.9±96.9pg/ml to the peak valne of 880.8±269.5pg/ml at 10min post injection (p<0.05), and then tended to decrease to the preinjection level. Serum cortisol concentration significantly increased from 0.65±0.32μg /dl to 9.02±1.52μg/dl at 20min post injection (p<0.05).These results indicate that AVP injection causes a significant increase in the serum concentration of ACTH followed by an incrcasc in cortisol in dairy cattle.