›› 2018, Vol. 45 ›› Issue (6): 1677-1682.doi: 10.16431/j.cnki.1671-7236.2018.06.032

Previous Articles     Next Articles

Cloning and Expression of Bc48 Gene of Babesia caballi Xinjiang Yili Strain and Preparation of Its Polyclonal Antibody

WANG Panju1, AIRIDENG Caicike2, XU Zhengmao1, WEN Xiuxiu1, DANG Nana3, SONG Jingjing1, ZHANG Mengyuan1, BA Yinchahan1   

  1. 1. College of Veterinary Medicine, Xinjiang Agricultureal University, Urumqi 830052, China;
    2. Autonomous Region Animal Health Supervision Office, Urumqi 830011, China;
    3. Hejing Town Station of Veterinary in Hejing Xinjiang, Hejing 841300, China
  • Received:2017-12-21 Online:2018-06-20 Published:2018-06-15

Abstract:

In order to express Bc48 gene of Babesia caballi from Xinjiang Yili,and prepare its polyclonal antibody,a pair of specific primers was designed according to Bc48 gene sequence of Babesia caballi in GenBank.The genomic DNA was extracted from Babesia caballi,and Bc48 gene was cloned into pET-28a(+) expression vector.The positive plasmid was transformed to Escherichia coli BL21(DE3).After IPTG induction,the product was analyzed by SDS-PAGE,six weeks old female BALB/c mice were immunized with purified Bc48 protein to prepare polyclonal antibodies.Meanwhile Bc48 gene was cloned into eukaryotic expression vector pCMV-N-flag.The positive plasmid was transformed to Escherichia coli DH5α,eukaryotic expression of pCMV-N-flag-Bc48 plasmid was transfected into 293T cells.The results showed that the recombinant protein with 15 ku was obtained,which was consistent with the expected protein size;Western blotting analysis showed that polyclonal antibodies could specifically identify the corresponded antigens;ELISA analysis showed that the antibodies had high titer (1:128 000);And eukaryotic expression plasmids expressed Bc48 protein in 293T cells.This test could lay the foundation for further study on the functional genes and establish quick detection method of Babesia caballi.It had important significance in the study of strain taxonomy and the development of candidate vaccine.

Key words: Babesia caballi; Bc48 gene; prokaryotic expression; eukaryotic expression; polyclonal antibody

CLC Number: