Dietary Copper Affects Lipid and Cholesterol Metabolism in Finishing Steers
Dietary Copper Affects Lipid and Cholesterol Metabolism in Finishing Steers
复制标题
DOI：
10.1007/0-306-47466-2_235
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Engle;J. Spears;C. Wright;T. A. Armstrong
中科院分区：
文献类型：
--
作者：
T. Engle;J. Spears;C. Wright;T. A. Armstrong
研究表明，在非反刍动物中添加超过推荐需要量的铜可以降低家禽的血浆和胸肌胆固醇浓度(Bakalli和Pesti，1994)，并降低猪脂肪组织中饱和脂肪酸与不饱和脂肪酸的比率(Amer和Elliot，1973)。在反刍动物中，在铜含量较低的日粮中添加铜导致绵羊脂肪细胞体积和脂解率增加(Sinnett-Smith和Woolliams，1987)，并减少牛的背脂深度和增加肋眼面积(Ward和Spears，1997)。因此，本研究旨在探讨不同铜源和水平对肉牛脂肪和胆固醇代谢的影响。
Supplementation of copper (Cu) to nonruminants above their recommended requirement has been shown to decrease plasma and breast muscle cholesterol concentrations in poultry (Bakalli and Pesti, 1994) and decrease the saturated to unsaturated fatty acid ratio in swine adipose tissue (Amer and Elliot, 1973). In ruminants, Cu supplementation to diets marginal in Cu led to an increase in adipose cell volume and lipolytic rate in sheep (Sinnett-Smith and Woolliams, 1987) and decreased backfat depth and increased rib eye area in cattle (Ward and Spears, 1997). Therefore, the present studies were conducted to determine the effects of dietary Cu source and level on lipid and cholesterol metabolism in beef cattle.