食品科学 ›› 2005, Vol. 26 ›› Issue (7): 208-211.

• 营养卫生 • 上一篇    下一篇

牛初乳中乳铁蛋白的分离纯化与免疫功能检测

 叶震敏, 王志耕, 余为一   

  1. 苏州大学医学院,安徽农业大学动物科技学院
  • 出版日期:2005-07-15 发布日期:2011-09-19

Isolation and Purification of Lactoferrin in Bovine Colostrums and Delection of Its Immune Function

 YE  Zhen-Min, WANG  Zhi-Geng, YU  Wei-Yi   

  1. 1.College of Medicine, SooChow University;2.College of Animal Science, Anhui Agricultural University
  • Online:2005-07-15 Published:2011-09-19

摘要: 牛初乳经离心、盐析后获得乳铁蛋白粗提物,通过CM-Sephadex C50离子交换色谱和Heparin-SepharoseCL-6B亲和色谱纯化获得纯度分别为76.98%和92.75%的乳铁蛋白,经SDS-PAGE检测乳铁蛋白存在分子质量分别为76000Da和78000Da的两种异构体,免疫电泳说明提纯样品与乳铁蛋白标准品具有相同的免疫原性。小白鼠喂养和免疫实验说明乳铁蛋白可提高机体免疫功能。

关键词: 初乳, 乳铁蛋白, 分离提纯, 免疫功能

Abstract: The lactoferrin was purified by centrifugation and ammonium sulfate precipitation from the bovine colostrums. Thepurity of lactoferrin after CM-Sephadex C50 ion-exchange chromatograph and Heparin-Sepharose CL-6B affinity chromato-graph was 76.98%and 92.75% respectively. The two kinds of lactoferrin isomers were assayed by SDS-PAGE and HPLC withthe molecular weights 76000Da and 78000Da respectively. The purified sample and standard lactoferrin showed the sameimmunogens through immunoelectrophoresis. The isolated lactoferrin improved the immune function significantly in miceexperiments.

Key words: colostrums, lactoferrin, isolation and purification, immune function