河南农业科学 ›› 2022, Vol. 51 ›› Issue (11): 135-144.DOI: 10.15933/j.cnki.1004-3268.2022.11.016

所属专题: 动物新型疫苗专题

• 畜牧·兽医 • 上一篇    下一篇

嗜水气单胞菌外膜蛋白AHA1182 的原核表达、纯化与免疫原性研究

简思杰1,2,晁嘉1,2孙薇1,3,陈锐1,4,丁锐1,4,陈琛1,3,5,刘祥1,2
  

  1. (1.陕西理工大学生物科学与工程学院/中德天然产物研究所,陕西 汉中 723001;2.阜阳师范大学 生物与食品工程学院,安徽 阜阳 236037;3.陕南秦巴山区生物资源综合开发协同创新中心,陕西 汉中 723001;4.陕西理工大学 秦巴生物资源与生态环境省部共建国家重点实验室(培育),陕西 汉中 723001;5.陕西省资源生物重点实验室,陕西 汉中 723001)
  • 收稿日期:2022-06-09 出版日期:2022-11-15 发布日期:2023-01-10
  • 通讯作者: 陈琛(1978-),男,陕西宝鸡人,教授,博士,主要从事蛋白质与多肽生物化学研究。E-mail:cchen@snut.edu.cn 刘祥(1983-),男,安徽合肥人,副教授,博士,主要从事动物疫苗开发研究。E-mail:liuxiang888525@163.com
  • 作者简介:简思杰(1997-),男,陕西渭南人,在读硕士研究生,研究方向:动物疫苗开发。E-mail:814964418@qq.com
  • 基金资助:
    陕西省科技厅面上项目(2022JM-120);国家外国专家局项目(GDT20186100426)

Prokaryotic Expression,Purification and Immunogenicity Study of Outer Membrane Protein AHA1182 of Aeromonas hydrophila

JIAN Sijie1,2,CHAO Jia1,2,SUN Wei1,3,CHEN Rui1,4,DING Rui1,4,CHEN Chen1,3,5,LIU Xiang1,2   

  1. (1.Chinese‑German Joint Institute for Naturel Product Research/College of Biological Sciences and Engineering,Shaanxi University of Technology,Hanzhong 723001,China;2.School of Biology and Food Engineering,Fuyang Normal University,Fuyang 236037,China;3.Qinling‑Bashan Mountains Bioresources Comprehensive Development C.I.C.,Hanzhong 723001,China;4.Qinba State Key Laboratory of Biological,Hanzhong 723001,China;5.Shaanxi Province Key Laboratory of Bio‑resources,Hanzhong 723001,China)
  • Received:2022-06-09 Published:2022-11-15 Online:2023-01-10

摘要: 为探究嗜水气单胞菌外膜蛋白AHA1182的免疫原性,依据AHA1182氨基酸序列,采用生物信息学分析嗜水气单胞菌、杀鲑气单胞菌、简氏气单胞菌、多样气单胞菌、舒氏气单胞菌、产碱普罗维登斯菌以及爱德华氏菌之间的亲缘关系;构建AHA1182原核表达菌株并确定最佳诱导表达条件;采用包涵体洗涤及SDS-PAGE 切胶纯化方法获得AHA1182 蛋白并免疫红鲫;利用Western blot 检测红鲫抗AHA1182蛋白血清的特异性与效价;采用酶联免疫吸附(ELISA)法模拟红鲫抗AHA1182蛋白抗体血清与嗜水气单胞菌的体外相互识别作用;通过测定酸性、碱性磷酸酶(ACP、AKP)活性与细胞吞噬作用,评价非特异性免疫;利用组织病理学切片探究AHA1182 蛋白免疫对红鲫内脏的影响。结果显示,AHA1182蛋白家族在不同菌株间均具有亲缘性,尤其在气单胞菌间亲缘关系较近,由此推测,AHA1182蛋白抗血清具有交叉免疫保护作用;成功克隆、表达、纯化AHA1182,最佳诱导条件:菌液浓度OD600=1.0,IPTG终浓度为0.5 mmol/L,在28℃条件下诱导8 h;红鲫AHA1182蛋白抗血清具有良好的特异性,AHA1182蛋白抗体与嗜水气单胞菌特异性结合(滴度可达1∶3 200);AKP、ACP、细胞吞噬作用均显示,AHA1182蛋白可激活红鲫非特异性免疫。从组织病理学切片可以看出,AHA1182蛋白对红鲫内脏结构无影响。综上,嗜水气单胞菌AHA1182蛋白具有良好的免疫原性。

关键词: 嗜水气单胞菌, 外膜蛋白AHA1182, 原核表达, 免疫原性, 红鲫血浆, 组织病理学切片, 主动免疫

Abstract: To evaluate the immunogenicity of outer membrane protein AHA1182 of Aeromonas hydrophila,bioinformatics method was firstly performed to analyze the relationship among A.hydrophilaA.salmonicidaA.schubertiiA.diversaA.jandaeiProvidenci alcalifaciens and Edwardsiella ictaluri.Recombinant expression strain of AHA1182 was constructed by molecular cloning and the optimal expression conditions were identified. AHA1182 was purified by inclusion body washing and SDS‑PAGE,and was used to immunize Carassius auratus.Western blot was used to assess the specificity and titer of the C.auratus serum,and enzyme‑linked immunosorbent assay(ELISA) was used to simulate the recognition effect between anti‑AHA1182 serum and A.hydrophila. Nonspecific immunity was assessed by acid phosphatase(ACP),alkaline phosphatase(AKP)and leukocyte phagocytosis.Furthermore,the toxicity of AHA1182 immunization to C.auratus was investigated by histopathological sections of visceral organ.The results showed that AHA1182 was genetically related among different bacteria,especially in Aeromonas,which meant that AHA1182 serum might have cross‑immune protective ability.AHA1182 was cloned,expressed and purified successfully,and the optimal expression conditions for AHA1182 included strain OD600 value of 1.0,isopropyl‑β‑D‑thiogalactoside(IPTG)concentration of 0.5 mmol/L,inducing temperature of 28 ℃ and inducing time of 8 hours.Western blot showed that AHA1182 serum had a high specificity and could recognize A.hydrophila in vitro with the titer of 1∶3 200.The results of AKP,ACP,and leukocyte phagocytosis indicated that AHA1182 stimulated the non‑specific immune of C.auratus. AHA1182 immunization had no toxicity to the visceral structure of C.auratus.The results suggest that A.hydrophila AHA1182 has good immunogenicity.

Key words: Aeromonas hydrophila, Outer membrane protein AHA1182, Prokaryotic expression, Immunogenicity, C.auratus plasma, Histopathological section, Active immunity

中图分类号: