食品科学 ›› 2011, Vol. 32 ›› Issue (13): 151-155.doi: 10.7506/spkx1002-6630-201113033

• 生物工程 • 上一篇    下一篇

鼠伤寒沙门氏菌特异性多克隆抗体的纯化方法

牛瑞江,赖卫华*,熊齐荣,魏华,熊勇华   

  1. 南昌大学食品科学与技术国家重点实验室
  • 出版日期:2011-07-15 发布日期:2011-07-02
  • 基金资助:
    科技部中小企业创新基金项目(10C26223601934)

Purification of Specific Polyclonal Antibody against Salmonella typhimurium

NIU Rui-jiang,LAI Wei-hua*,XIONG Qi-rong,WEI Hua,XIONG Yong-hua   

  1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
  • Online:2011-07-15 Published:2011-07-02

摘要: 以福尔马林灭活的鼠伤寒沙门氏菌免疫雌性日本大耳兔,制备抗沙门氏菌的多克隆抗体。分别通过辛酸-硫酸铵沉淀法、磁珠偶联抗原吸附法纯化抗体,所制备的抗体效价为3.2×105,纯度较高,但交叉反应现象较严重。本实验以杂菌抗原反向吸附法纯化抗体,有效消除了抗体与杂菌的交叉反应,初步建立了一种高特异性多克隆抗体的纯化方法。

关键词: 关键词:鼠伤寒沙门氏菌, 多克隆抗体, 反向吸附, 交叉反应

Abstract: A highly specific anti-Salmonella typhimurium polyclonal antibody was prepared for immunological determination of Salmonella typhimurium. Anti-Salmonella typhimurium polyclonal antibody was generated in Japanese rabbits using formalin-inactivated Salmonella typhimurium as antigen and purified by octanoic acid-ammonium sulfate precipitation and magnetic bead-antigen coupling. The titer of the prepared highly pure antibody was 3.2 × 105; however, this antibody revealed serious cross-reaction with other bacteria. In this paper, the antibody was purified by miscellaneous bacterial antigens in a reverse adsorption mode, which could eliminate the cross reaction between the antibody and miscellaneous bacteria. Therefore, an effective purification method to obtain specific polyclonal antibody was established.

Key words: Salmonella typhimurium, polyclonal antibody, reverse adsorption, cross reactivity

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