食品科学 ›› 2010, Vol. 31 ›› Issue (22): 86-90.doi: 10.7506/spkx1002-6630-201022018

• 工艺技术 • 上一篇    下一篇

基于超滤法从牛初乳中分离胰岛素样生长因子- Ⅰ的工艺条件

郭 洪,陈庆森* ,闫亚丽   

  1. 天津市食品生物技术重点实验室,天津商业大学生物技术与食品科学学院
  • 收稿日期:2010-07-20 修回日期:2010-10-22 出版日期:2010-11-25 发布日期:2010-12-29
  • 通讯作者: 陈庆森 E-mail:chqsen@tjcu.edu.cn
  • 基金资助:

    天津市科技支撑计划重点项目(09ZCKFNC00700)

Use of Ultra-filtration for Separation of Insulin-like Growth Factor-Ⅰ from Bovine Colostrums

GUO Hong,CHEN Qing-sen*,YAN Ya-li   

  1. Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology and Food Science, Tianjin University of
    Commerce, Tianjin 300134, China
  • Received:2010-07-20 Revised:2010-10-22 Online:2010-11-25 Published:2010-12-29
  • Contact: CHEN Qing-sen E-mail:chqsen@tjcu.edu.cn

摘要:

利用超滤技术从牛初乳中分离IGF-Ⅰ,并对脱脂和超滤条件进行优化。IGF-Ⅰ的质量浓度检测采用放射免疫法测定,总蛋白质量浓度采用考马斯亮蓝法测定。结果表明:牛初乳中分离IGF-Ⅰ过程中制备脱脂乳最适工艺条件为36℃、4000r/min 离心15min;经截留分子质量为10~20kD 的中空纤维膜超滤除杂蛋白和6kD 的中空纤维膜超滤去除乳糖等小分子物质,所得的IGF-Ⅰ的纯度浓度较初乳中提高了约3660 倍。本方法确立了从牛初乳中分离纯化较高纯度IGF-Ⅰ的技术路线。

关键词: 牛初乳, 胰岛素样生长因子-Ⅰ(IGF-Ⅰ), 脱脂, 超滤法, 工艺条件

Abstract:

Insulin-like growth factors play important roles in the cell differentiation, animal growth, development, reproduction and metabolism, and are largely present in the bovine colostrums. In present study, insulin-like growth factor-Ⅰ(IGF-Ⅰ) was separated from bovine colostrums by using ultra-filtration, and the degreasing and ultra-filtration conditions were optimized. The IGF-Ⅰand total protein concentrations were detected by radio-immunoassay(RIA) and coomassie blue staining, respectively. The results showed that the optimum degreasing conditions were as follows: centrifugation temperature 36 ℃, centrifugation speed 4000 r/min and centrifugation time 15 min. Macromolecular impurities protein and lactose could be removed after ultra-filtration with molecular weight cut-off 10-20 kD and 6 kD membrane, respectively. The relative concentration of IGF-Ⅰwas 3660 times higher than that in colostrums after ultra-filtration.

Key words: colostrums, insulin-like growth factor- Ⅰ(IGF- Ⅰ), lipid extraction, ultra-filtration, technological conditions

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