Pérez-Llamas F, Garaulet M, Martínez J A, Marín J F, Larqué E, Zamora S
Department of Physiology, Faculty of Biology, University of Murcia, Spain.
J Physiol Biochem. 2001 Dec;57(4):321-8. doi: 10.1007/BF03179826.
The apparent digestibility coefficient (ADC) of amino acids and the balance of minerals (calcium, phosphorus, magnesium and iron) has been determined in rats fed four diets differing in the protein type (casein or soy protein) and iron source (ferrous sulphate or lactate) in order to study the possible interactions of these nutrients. The availability of amino acids, especially essential amino acids, was greater in the diet made with animal protein (casein). The iron source also affected the absorption of most amino acids in all the diets assayed with ferrous sulphate being greater. The balance of iron, magnesium and phosphorus was higher in the diets containing animal protein. The retention of calcium and magnesium was significantly greater when ferrous sulphate was used as iron source. These results demonstrate the important interaction between amino acids and minerals and between the minerals themselves, which must be carefully studied when selecting different types of protein or mineral sources in human or animal nutrition.
为了研究这些营养素之间可能的相互作用，已在喂食四种蛋白质类型（酪蛋白或大豆蛋白）和铁源（硫酸亚铁或乳酸亚铁）不同的日粮的大鼠中测定了氨基酸的表观消化率系数（ADC）以及矿物质（钙、磷、镁和铁）的平衡。动物蛋白（酪蛋白）制成的日粮中氨基酸，尤其是必需氨基酸的利用率更高。铁源也影响了所有测定日粮中大多数氨基酸的吸收，硫酸亚铁的吸收量更大。含动物蛋白的日粮中铁、镁和磷的平衡更高。当使用硫酸亚铁作为铁源时，钙和镁的保留量显著更高。这些结果证明了氨基酸与矿物质之间以及矿物质本身之间的重要相互作用，在人类或动物营养中选择不同类型的蛋白质或矿物质来源时，必须仔细研究这种相互作用。
