2Ramsay T G. Somatomedins[J].Pig News and Information, 1990,11(4):515-518.
3Froesh E R.Action of insulin-like growth factors[J].Ann Rev Physiol,1985,47:443-467.
4Gronowski A M, Rotwein P. Rapid changes in gene expression after in vivo growth hormone treatment[J].Endocrinology,1995,135(11):4741-4748.
5Yamashita S,Melmed S.Insulin-like growth factor I regulation of growth hormone gene transcription in primary rat pituitary cells[J].J Clin Invest,1987,79:449-452.
6Leung K C,Rajkovic I A,Peters E,et al.Insulin-like growth factor I and insulin-like down-regulate growth hormone receptors in rat osteoblasts:evidence for a peripheral feedback loop regulating[J]. Endocrinology,1996,137:2694-2702.
7Ruan W F,Catanese V,Wieczorek R,et at.Estradiol enhances the stimulatory effect of insulin-like growth factor I(IGF-I)on mammary development and growth hormone-induced IGP-I messenger ribonucleic acid[J].Endocrinology,1995,136:1296-1303.
8Luo X G,Dove C R, Effect of dietary copper and fat on nutrient utilization,digestive enzyme activities,and tissue mineral levels in weanling pig[j].J Anim Sci,1996,74:1888-1896.
9Zhou W,Kornegay E T,Welten M K,et al.Stimulation of growth in weanling pigs by intravenous administratio of copper[J].I Anim Sci,1992,70(Suppl.1):228.
10Zhou W,Kornegay E T,Laar H V. et al.The role of feed consumption and feed efficiency in copper-stimu-lated growth[J].J Anim Sci,1994,72:2385-2394.
