TY - JOUR T1 - Comparison of Central Effects of L-Ornithine Metabolites on the Stress Responses of Neonatal Chicks AU - Kurauchi, I. AU - Shigemi, K. AU - Yamada, S. AU - Aoki, M. AU - Kawada, Y. AU - Morishita, K. AU - Denbow, D.M. AU - Furuse, M. JO - Journal of Animal and Veterinary Advances VL - 8 IS - 12 SP - 2580 EP - 2584 PY - 2009 DA - 2001/08/19 SN - 1680-5593 DO - javaa.2009.2580.2584 UR - https://makhillpublications.co/view-article.php?doi=javaa.2009.2580.2584 KW - L-ornithine KW -D-ornithine KW -L-citrulline KW -intracerebroventricular injection KW -social separation stress KW -neonatal chick AB - Recently, we observed that central administration of L-arginine attenuated the stress responses of neonatal chicks by inducing a sedative and hypnotic effect. In addition, L-ornithine, which is produced from L-arginine in the brain, appeared to interact with L-arginine during a stress response. Several putative metabolites from L-ornithine, including L-citrulline and D-ornithine, were therefore investigated in the present study. The effects of intracerebroventricular injection of L-ornithine, L-citrulline and D-ornithine were compared in chicks under an isolation-induced stress. L-ornithine greatly attenuated the stress response and induced sedative and hypnotic effects. D-ornithine weakly attenuated the stress responses, while L-citrulline had no effect. ER -