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中国精品科技期刊2020
梁夏夏,袁倩云,刘蕾,等. 副溶血性弧菌外膜蛋白VP1008和弧菌铁蛋白受体的重组表达及抗体交叉反应[J]. 食品工业科技,2021,42(19):144−151. doi: 10.13386/j.issn1002-0306.2021030061.
引用本文: 梁夏夏,袁倩云,刘蕾,等. 副溶血性弧菌外膜蛋白VP1008和弧菌铁蛋白受体的重组表达及抗体交叉反应[J]. 食品工业科技,2021,42(19):144−151. doi: 10.13386/j.issn1002-0306.2021030061.
LIANG Xiaxia, YUAN Qianyun, LIU Lei, et al. Recombinant Expression and Antibody Cross-reaction of the Outer Membrane Protein VP1008 and Ferric Vibrioferrin Receptor of Vibrio parahaemolyticus[J]. Science and Technology of Food Industry, 2021, 42(19): 144−151. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021030061.
Citation: LIANG Xiaxia, YUAN Qianyun, LIU Lei, et al. Recombinant Expression and Antibody Cross-reaction of the Outer Membrane Protein VP1008 and Ferric Vibrioferrin Receptor of Vibrio parahaemolyticus[J]. Science and Technology of Food Industry, 2021, 42(19): 144−151. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021030061.

副溶血性弧菌外膜蛋白VP1008和弧菌铁蛋白受体的重组表达及抗体交叉反应

Recombinant Expression and Antibody Cross-reaction of the Outer Membrane Protein VP1008 and Ferric Vibrioferrin Receptor of Vibrio parahaemolyticus

  • 摘要: 目的:副溶血性弧菌特异性表面抗原对副溶血性弧菌免疫检测具有重要意义,目前外膜孔蛋白VP1008(39.3 kDa)和弧菌铁蛋白受体(78.7 kDa)的免疫原性仍不清楚。方法:从基因组DNA扩增了目的基因,分别构建了含目的基因的pET-28a(+)重组质粒,转入大肠杆菌BL21并经异丙基-β-D-硫代半乳糖苷(IPTG)诱导表达两种重组蛋白。采用镍柱纯化的重组蛋白分别免疫了BALB/c小鼠,并通过酶联免疫吸附反应(ELISA)和免疫印迹研究了小鼠多抗与不同株副溶血性弧菌、其它弧菌等菌株的交叉反应。结果:重组蛋白VP1008和弧菌铁蛋白受体均以包涵体形式表达,小鼠多抗与免疫的重组蛋白的效价>1000 K,与7株副溶血性弧菌的效价在4.5~13.5 K,与10株弧菌基本无交叉反应,与肠杆菌的交叉反应和纯化过程中大肠杆菌蛋白的微量残留有关;多抗均与副溶血性弧菌全菌蛋白在目标位置出现反应条带,其中VP1008多抗效价和免疫原性相对较好。结论:外膜蛋白VP1008小鼠多抗对副溶血性弧菌识别性、免疫原性较好,为建立新的副溶血性弧菌免疫检测方法奠定了基础。

     

    Abstract: Objective: The study of V. parahaemolyticus specific surface antigens is of importance to develop immunoassays of immune detection. The immunogenicity study of V. parahaemolyticus differential outer membrane protein (VP1008) and ferric vibrioferrin receptor (pvuA) has not been revealed. Methods: The target genes were amplified from the genome DNA and the recombinant plasmids pET-28a(+) were respectively constructed and transformed into E. coli BL21. The two recombinant proteins were both induced by Isopropyl-β-D-Thiogalactoside (IPTG). After purified by a NI-NTA column, the purified recombinant proteins were immunized to the BALB/c mice. The cross-reaction of the polyclone antibodies (pAb) with different isolates of V. parahaemolyticus and other Vibrio species was studied by enzyme-linked immunosorbent assay (ELISA) and immunoblotting. Results: The recombinant protein VP1008 and Vibrio ferritin receptor were expressed as inclusion bodies, the pAb both strongly reacted to the corresponding recombinant protein (>1000 K), reacted with 7 strains of V. parahaemolyticus (4.5~13.5 K), and basically did not react with 10 strains of Vibrio, the cross-reaction with Enterobacteriaceae strains was related with the residual proteins of E. coli during the purification steps. The pAb also both reacted with the target protein in the cell lysates of the V. parahaemolyticus strains. Comparatively, the pAb against VP1008 had a higher antibody titer and immunogenicity. Conclusion: The pAb against the recombinant Omp VP1008 recognized the V. parahaemolyticus strains with higher titer, which laid the foundation for preparing a new immunoassay against V. parahaemolyticus.

     

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