Tsuji S, Hirata Y, Mukai F, Ohtagaki S
Faculty of Agriculture Kobe University, Japan.
J Dairy Sci. 1990 Jan;73(1):125-8. doi: 10.3168/jds.S0022-0302(90)78654-7.
Lactoferrin content of colostrum obtained from cows within 24 h after parturition was measured using a single radial immunodiffusion test and was compared among cows of two dairy breeds (Holstein-Friesian, Jersey) and two beef breeds (Japanese Black and Japanese Brown). Average lactoferrin content in colostrum of dairy breeds was 2 mg/ml and in colostrum of beef breeds was .5 mg/ml. Lactoferrin content of colostrum due to lactation number was also different among breeds. In dairy breeds, multiparous cows had lactoferrin content two to three times higher than that of primiparous cows; beef breeds showed no obvious differences between lactation years. Lactoferrin content also varied considerably within breed. In beef breeds, half the cows had values of nearly zero. Transferrin content in colostrum was fairly constant (.9 mg/ml) and was not as variable among and within breeds. There was no correlation between lactoferrin and transferrin contents in colostrum. Examination of cows lacking lactoferrin suggested that transferrin plays an important role as an iron carrier from a cow to her newborn calf.
使用单向辐射免疫扩散试验测定分娩后24小时内从奶牛获取的初乳中的乳铁蛋白含量，并在两个奶牛品种（荷斯坦-弗里生牛、泽西牛）和两个肉牛品种（日本黑牛和日本褐牛）之间进行比较。奶牛品种初乳中的乳铁蛋白平均含量为2毫克/毫升，肉牛品种初乳中的乳铁蛋白平均含量为0.5毫克/毫升。不同品种初乳中乳铁蛋白含量因产次而异。在奶牛品种中，经产奶牛的乳铁蛋白含量比初产奶牛高出两到三倍；肉牛品种在不同产次之间没有明显差异。乳铁蛋白含量在品种内也有很大差异。在肉牛品种中，一半奶牛的乳铁蛋白含量几乎为零。初乳中的转铁蛋白含量相当恒定（0.9毫克/毫升），在品种间和品种内的变化都不大。初乳中乳铁蛋白和转铁蛋白含量之间没有相关性。对缺乏乳铁蛋白的奶牛进行检查表明，转铁蛋白作为从奶牛到其新生犊牛的铁载体发挥着重要作用。
