LI Liª²Li1, LIU Yunª²Hua2, HOU Deª²Xing3, YIN Yuª²Long1, ZHANG Bin2, HOU Zhenª²Ping1, QIU Xiª²Min4

    1Institute of Subtropical Agriculture, Chinese Academy of Science, Changsha 410125,China, 2College of Animal Science and Technoª²logy, Hunan Agricultural University,Changsha 410128,China, 3Department of Biochemical and Technology, Faculty of Agriculture, Kagoshima University, Kagoshima 890ª²8580, Japan, 4Medical College,Hunan Normal University,Changsha 410006,China

    ¡¾Abstract¡¿ AIM: To inverstigate the effects of exogenous Znª²metallothionein (Znª²MT) on antiª²oxidative function and gene expression of SOD in weaning piglets. METHODS: Eighteen piglets (Duroc¡ÁLandrace¡ÁYorkshire) were selected and divided into 3 groups (1, 2 and 3) randomly. The piglets were sport to produce stress. Znª²MT of piglet liver dissolved in physiological saline were then injected into the piglets of group 1, 2 and 3 with the concentrations of 0, 0.8, 1.6 mg/kg, respectively. Three and 6 h later, 3 piglets were selected from each group randomly and slaughtered to get liver samples. The biochemical indexes related to antioxidation and the level of SOD gene expression in liver were determined. RESULTS: After Znª²MT injection, the activities of SOD and GSHª²PX increased significantly (P<0.05) ......