畜牧兽医学报 ›› 2024, Vol. 55 ›› Issue (10): 4773-4778.doi: 10.11843/j.issn.0366-6964.2024.10.046

• 研究简报 • 上一篇    下一篇

猫传染性腹膜炎病毒N蛋白表达及其多克隆抗体制备

刘福康1,2(), 袁莉刚1,*(), 张达2, 汤傲星2, 刘光清2, 朱杰2,*()   

  1. 1. 甘肃农业大学动物医学院, 兰州 730070
    2. 中国农业科学院上海兽医研究所, 上海 200241
  • 收稿日期:2023-10-07 出版日期:2024-10-23 发布日期:2024-11-04
  • 通讯作者: 袁莉刚,朱杰 E-mail:liufukang1015@163.com;yuan2918@126.com;zj121@shvri.ac.cn
  • 作者简介:刘福康(1998-), 男, 甘肃庆阳人, 硕士生, 主要从事动物解剖与组织胚胎学研究, E-mail: liufukang1015@163.com
  • 基金资助:
    上海市市级科技重大专项(ZD2021CY001);上海市自然科学基金项目(22ZR1476300)

Preparation and Application of N Protein Polyclonal Antibody of Feline Infectious Peritonitis Virus SH2021 Strain

Fukang LIU1,2(), Ligang YUAN1,*(), Da ZHANG2, Aoxing TANG2, Guangqing LIU2, Jie ZHU2,*()   

  1. 1. College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, China
    2. Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China
  • Received:2023-10-07 Online:2024-10-23 Published:2024-11-04
  • Contact: Ligang YUAN, Jie ZHU E-mail:liufukang1015@163.com;yuan2918@126.com;zj121@shvri.ac.cn

摘要:

本研究旨在体外原核表达猫传染性腹膜炎病毒(feline infectious peritonitis virus, FIPV)SH2021株核衣壳蛋白(nucleocapsid, N),制备兔源多克隆抗体。根据FIPV SH2021株N基因序列设计引物,构建pCold-I-N重组表达质粒。随后,将重组质粒转化至表达感受态细胞BL21(DE3),在终浓度为1.0 mmol·L-1的IPTG和16 ℃的诱导条件下进行表达。最后,利用His层析柱进行纯化,纯化后的重组蛋白免疫新西兰大白兔制备多克隆抗体。结果表明,纯化获得重组N蛋白大小约为45 ku,制备的N蛋白兔多克隆抗体效价可达1∶512 000,该抗体对N蛋白具有良好的反应原性。本研究成功所制备了FIPV N蛋白兔多克隆抗体,该抗体具有良好的反应原性和特异性,为FIPV抗原抗体检测以及研究N蛋白生物学功能研究提供重要工具。

关键词: 猫传染性腹膜炎病毒, 猫冠状病毒, N蛋白, 基因克隆, 原核表达, 多克隆抗体

Abstract:

This study aimed to express the nucleocapsid protein (N) of feline infectious peritonitis virus (FIPV) strain SH2021 in vitro and prepare rabbit polyclonal antibodies. Primers were designed based on the N gene sequence of FIPV strain SH2021 to construct the recombinant expression plasmid pCold-I-N. Subsequently, the recombinant plasmid was transformed into expression-competent cells BL21 (DE3), and expression was induced under conditions of 1.0 mmol·L-1 IPTG and 16 ℃. Finally, purification was performed using a His column, and the purified recombinant protein was used to immunize New Zealand white rabbits to prepare polyclonal antibodies. The experimental results showed that the purified recombinant N protein had a size of approximately 45 ku, and the titer of the prepared rabbit polyclonal antibodies against the N protein reached 1∶512 000. The antibodies exhibited good reactivity and specificity towards the N protein. This study successfully prepared rabbit polyclonal antibodies against the FIPV N protein, which showed good reactivity and specificity, providing important tools for FIPV antigen-antibody detection and research on the biological functions of the N protein.

Key words: feline infectious peritonitis virus, feline coronavirus, N protein, gene cloning, prokaryotic expression, polyclonal antibody

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