Journal of Henan Agricultural Sciences ›› 2021, Vol. 50 ›› Issue (12): 149-154.DOI: 10.15933/j.cnki.1004-3268.2021.12.017

Special Issue: 非洲猪瘟专题

• Animal Science Veterinary Medicine • Previous Articles     Next Articles

Expression and Monoclonal Antibody Preparation of the p22 Protein of African Swine Fever Virus

YAN Shijun1,2,HAO Liying3,BAI Lulu1,2,ZHENG Dingding3,SONG Huanhuan1,2,LI Shengqiang1,2,WANG Tongyan1,2,TAN Feifei1,2,DENG Junhua3,TIAN Kegong1,2,3   

  1. (1.National Research Center for Veterinary Medicine,Luoyang 471000,China;2.Publike Bioengineering Co.,Ltd.,Luoyang 471000,China;3.Luoyang Putai Biotechnology Co.,Ltd.,Luoyang 471000,China)
  • Received:2021-05-07 Published:2021-12-15 Online:2022-01-28

非洲猪瘟病毒p22 蛋白的表达及单克隆抗体制备

颜世君1,2,郝丽影3,白露露1,2,郑丁丁3,宋欢欢1,2,李胜强1,2,王同燕1,2,谭菲菲1,2,邓均华3,田克恭1,2,3
  

  1. (1.国家兽用药品工程技术研究中心,河南洛阳471000;2.普莱柯生物工程股份有限公司,河南洛阳471000;3.洛阳普泰生物技术有限公司,河南洛阳471000)
  • 通讯作者: 邓均华(1978-),女,四川阆中人,兽医师,硕士,主要从事动物疫病诊断与防控技术研究。E-mail:dengbetter88@163.com 田克恭(1964-),男,山西万荣人,研究员,博士,主要从事动物疫病诊断与防控技术研究。E-mail:vetvac@126.com
  • 作者简介:颜世君(1986-),女,山东淄博人,工程师,硕士,主要从事基因工程疫苗研究。E-mail:xiaohuolong_001@163.com 郝丽影为同等贡献作者
  • 基金资助:
    洛阳市重大科技专项(1901029A)

Abstract: In order to develop an immunodiagnostic reagent for African swine fever virus,the Bac‐to‐Bac baculovirus expression system was used to express the p22 protein of African swine fever virus,the anti‐p22 protein monoclonal antibody was prepared and its reactogenicity with African swine fever virus was identified. The results showed that the recombinant baculovirus AcNPV‐p22 was successfully obtained,and the soluble recombinant protein of p22 with the size of about 22 ku was expressed.Western blot analysis confirmed that the protein had a good reactivity with African swine fever virus positive serum.Positive hybridoma cells(3D2,4A7)stably secreting monoclonal antibodies against African swine fever virus p22 protein were screened. The ascites ELISA titers of the two hybridoma cells were higher than 1∶128 000.Monoclonal antibodies isotype assay showed that the heavy chain was IgG1,and the light chain was κ.The IFA results showed that the prepared monoclonal antibody could specifically react with African swine fever virus.In summary,this study successfully expressed African swine fever virus p22 protein by baculovirus‐insect expression system and the monoclonal antibodies against African swine fever virus p22 protein were successfully prepared.

Key words: African swine fever virus, p22 protein, Baculovirus expression system, Monoclonal antibody, Indirect immunofluorescence assay

摘要: 为研发非洲猪瘟病毒的免疫诊断学试剂,利用Bac-to-Bac杆状病毒表达系统表达非洲猪瘟病毒p22蛋白,制备抗p22蛋白单克隆抗体并鉴定其与非洲猪瘟病毒的反应性。结果显示,成功制备重组杆状病毒AcNPV-p22,表达得到大小约22 ku可溶性的重组p22蛋白。Western blot鉴定结果表明,重组p22蛋白可以与非洲猪瘟病毒阳性血清发生特异性反应。筛选到能够稳定分泌抗非洲猪瘟病毒p22蛋白单克隆抗体的杂交瘤细胞株(3D2、4A7),腹水ELISA效价均高于1∶128 000;单克隆抗体亚类分型鉴定结果表明,重链均为IgG1,轻链均为κ;间接免疫荧光试验(IFA)结果表明,制备的单克隆抗体能与非洲猪瘟病毒发生特异性反应。综上,利用杆状病毒-昆虫表达系统成功表达了可溶性的非洲猪瘟病毒重组p22蛋白,并制备抗p22蛋白单克隆抗体。

关键词: 非洲猪瘟病毒, p22蛋白, 杆状病毒表达系统, 单克隆抗体, 间接免疫荧光试验

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