含有分子内佐剂的CIC蛋白表达及免疫活性初步研究

doi:10.16431/j.cnki.1671-7236.2017.12.031

Abstract

Abstract:

To express CTB-IsdBid-Clfais(CIC) protein and evaluate its immunogenicity, CTB (as a molecular adjuvant) could be tandem linked with IsdBid-Clfais gene by the overlapping PCR method, then CTB-IsdBid-Clfais(CIC) was inserted into pET-32a(+) vector to construct recombinant plasmids pET-32a(+)-CTB-IsdBid-Clfais. The recombinant plasmids pET-32a(+)-CTB-IsdBid-Clfais were transformed into Escherichia coli (E.coli) BL21 to express the CTB-IsdBid-Clfa(CIC) protein, the CIC expression protein and its immune activity were detected by Western blotting and ELISA,respectively. The results showed that the length of CIC gene were 2 072 bp, and CIC was correctly inserted into the pET-32a(+) plasmids, the pET-32a(+)-CTB-IsdBid-Clfais recombinant plasmids were successfully constructed. Western blotting result confirmed that the molecular weight of CIC proteins was 95.9 ku, which were correctly expressed by E.coli BL21 with pET-32a (+)-CTB-IsdBid-Clfais plasmids. ELISA results showed that there was no significant difference among the CIC, IsdBid and Clfais protein groups (P>0.05), and there was extremely significant difference between CIC and BSA protein groups (P<0.01). In conclusion, the pET-32a(+)-CTB-IsdBid-Clfais recombinant plasmids were successfully constructed, CIC proteins were correctly expressed, and were able to react with serum from mice immunized with IsdBid and Clfais,respectively,therefore, CIC proteins had strong immune activity.

Key words: Staphylococcus aureus; CTB-IsdBid-Clfais protein; protein expression; immunogenicity

CLC Number:

S852.4

ZHANG Shao-duo, LAI Yi-jun, JIANG Hui, CHENG Xin-ran, YE Yu-ting, HE Xi-yu, XU Le, SONG Bai-fen, YU Li-quan, CUI Yu-dong, MA Jin-zhu. Study on Expression and Preliminary Immunocompetence of CIC Protein Containing Molecular Adjuvants[J]. , 2017, 44(12): 3612-3617.

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Study on Expression and Preliminary Immunocompetence of CIC Protein Containing Molecular Adjuvants

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